Software Engineer – python – blockchain at Clearmatics

We are scaling rapidly and looking to hire a Software Engineer to join our growing QA and Test function.

You’ll be joining a team that is building innovative tools, services, and frameworks to solve hard engineering problems and ensure that our software achieves our rigorous standards for correctness and high-reliability.

This role will be reporting to our Head of QA and Test.

Responsibilities

You will be responsible for the following:

  • Designing and implementing automated tests or test generators
  • Developing tools, services, and frameworks to facilitate testing
  • Evaluating and implementing solutions to improve the platform
  • Reviewing test results and reporting defects that are found
  • Liaising with other development teams to resolve issues

REQUIREMENTS

Essential Skills & Experience

  • Strong Python programming skills with a focus on back-end or systems-level development
  • Experience programming in at least one statically-typed language (Golang, C/C++, Rust)
  • Strong problem-solving skills and the ability to think critically and systematically
  • A good understanding of Linux OS, TCP/IP networking, and common network protocols
  • Proficient in development and Bash shell scripting in a Linux CLI environment
  • Experience developing/testing REST, gRPC, or JSON-RPC APIs in a microservice architecture
  • An appreciation of the development practices that contribute to software quality
  • Familiar with Docker/OCS container-based development workflow and Kubernetes orchestration

Desirable Skills & Experience

  • Ethereum ecosystem experience: APIs, clients, protocols, algorithms, and technologies
  • Practical knowledge of distributed systems, consensus algorithms, and P2P technologies
  • Knowledge of Solidity smart contract language and testing with Truffle and Node.js
  • Experience with test automation frameworks and component/integration/system testing
  • Expertise in network capture, packet analysis/filtering, and software-defined networking
  • Front-end web development skills: HTML/CSS, JavaScript/TypeScript, JQuery, React or Vue.js
  • Fluency in SQL and experience with relational database management (PostgreSQL, SQLite)
  • Experience with financial products or market infrastructure in a financial institution

What we value at Clearmatics:

  • Collaboration and respect
  • Honesty & Humility
  • Ability to challenge opinions with logic and evidence
  • Willingness to work hard and solve hard problems
  • Passion for distributed technology, cryptography, and their implications for society
  • Continuous improvement and learning.

If you’d like to make significant contributions to the blockchain ecosystem and think you are a match, then we’d like to hear from you.

Senior Java/Kotlin Developer: Financial revolution at OpsTalent

We are accompanying our client – 4 million users award-winning app creator – in building a global bank to suit their customers lifestyle. We agree with them that in today’s hyper-connected world you deserve a progressive financial partner.  One that adapts to your needs, gives you control and constantly pushes you into new exciting spaces.

Imagine a world without traditional banks, without exaggerated bureaucracy, with easy access to your money whenever you are all over the world. Imagine the world where you can easily control your budget, savings, use traditional money and cryptocurrency at the same time. This is the goal.

Help us create the first truly global bank. Join us in our Cracow or London office.

Let’s revolutionize the financial world together!

Requirements

What you will be working on: 

  • In the beginning, you will be part of the operations team working on localisations. Your time and experience will be most valued in helping us make the website, emails, CRM System work more dynamic to create a more personalised experience for the end-user.
  • Building mobile APIs, developing microservices, perfecting a number of systems our app depends on (risk management, fraud detection, payment processing).
  • A great chance to focus on greenfield development with a bit of improvement of existing systems.

What’s in there for you:

  • We’ve hired some of the most talented engineers, so you will definitely grow with us 
  • We believe in people behind the technology, so you will be working only with passionates
  • Our dev team is the heart of everything we do, so you will have a lot of trust and autonomy
  • A huge variety of duties, it means a lot of opportunities to switch between tasks and teams
  • We believe in being flexible, so you can count on working remotely from time to time.

Buzzwords:

  • Java
  • Kotlin
  • Spark
  • TDD
  • Gerkin
  • Continuous integration
  • Internal framework

It would be perfect if you:

  • Have +3 years of experience (Java or Kotlin would be perfect)
  • Enjoy working in the team
  • Have experience in TDD methodology
  • Excellent written and spoken English
  • Have problem-solving attitude
  • Have computer science background
  • Are eager to grow and learn.

Benefits:

  • Competitive salary 
  • Biannual equity bonuses 
  • All the latest tech you need 
  • Home office once a week 
  • Pension plan 
  • Private health insurance 
  • Food on delivery 
  • Fresh fruit and cereals 
  • Juice, tea, coffee and soft drinks on tap.

By choosing to apply you agree on:

1. I hereby give consent to the processing of my personal data, other data contained in my application e.g. a photo attached to a CV (valid if there is a photo visible) and the CV for the needs of the current recruitment process conducted by OpsTalent spóka z o.o. sp.k. registered in the Register of Entrepreneurs of the National Court Register by the District Court for Wrocaw-Fabryczna in Wrocaw, VI Commercial Division, under the number KRS 0000564554; NIP: 899-27-69-445, REGON: 361866553.

This consent allows the processing of any additional data provided in the application, including the processing and sharing of personal data to IT service providers, as well as OpsTalent customers and business partners throughout the European Union for the purposes of current recruitment.

Providing data is voluntary but necessary for this purpose. Processing your data is lawful because it is necessary in order to take steps at the request of the data subject prior to entering into a contract (article 6 point 1b of Regulation EU 2016/679 – GDPR).

2. If you want us to keep your CV in our database, add the following consent in the CV: “I agree with the processing by OpsTalent spóka z o.o. sp.k. registered in the Register of Entrepreneurs of the National Court Register by the District Court for Wrocaw-Fabryczna in Wrocaw, VI Commercial Division, under the number KRS 0000564554; NIP: 899-27-69-445, REGON: 361866553, personal data contained in my recruitment application for future recruitment purposes”  your profile will be stored in our database for a period of 2 years. This consent allows the processing of data provided in the application, including the processing and sharing of personal data to customers and partners of OpsTalent throughout the European Union in future recruitment processes.

3. Obligatory Information. The data administrator is OpsTalent spóka z o.o. sp.k. registered in the Register of Entrepreneurs of the National Court Register by the District Court for Wrocaw-Fabryczna in Wrocaw, VI Commercial Division, under the number KRS 0000564554; NIP: 899-27-69-445, REGON: 361866553.z with its registered office in Wrocaw, ul. lna 132. The data Administrator can be contacted by: email address [email protected] , contact form at www.opstalent.com, by phone on 71 7275700 or in writing to the address of the administrator’s office. Your personal data will be processed: a) in order to perform duties resulting from legal provisions related to the employment process, including in particular the Labor Code – the legal basis for processing is the legal obligation incumbent on the Administrator (Article 6 (1) c of the General Regulation on Personal Data Protection No. 2016 / 679 (Regulation 2016/679) in connection with the provisions of the Labor Code), b) in order to conduct the recruitment process for data not required by law – the legal basis for processing is consent (Article 6 (1) (a) of Regulation 2016/679), c) for purposes of conducting future recruitment processes, in case of consent to the processing of data for this purpose – the legal basis for processing is consent (Article 6 (1) (a) of Regulation 2016/679), d) to establish or pursue possible claims or defend against such claims by the Administrator – the legal basis for data processing is the legitimate interest of the Administrator (Article 6 (1) etter f of Regulation 2016/679). Your personal data may be transferred to entities that process personal data at the request of the Administrator: IT service providers. The data will be processed until you withdraw your consent to the processing of personal data or the expiry of a 2-year period. The period of storage of personal data may be extended each time for a period of limitation of claims if the processing of personal data will be necessary to seek possible claims or defend against such claims by the Administrator. You have the right to access your data and the right to demand rectification, deletion or restriction of their processing or the right to withdraw your consent at any time by providing a contact to the Administrator. 

Python Developer: Project migration (Py2 to Py3) at OpsTalent

We are accompanying our client – NY Stock Exchange-listed company – on an exciting journey towards delivering reinsurance solutions across global platforms and matching well-structured risk with efficient capital.

The original reinsurance system meets the needs of users when making the right risk decisions on grounds of probabilistic risk modeling techniques, in particular of natural hazards such as earthquakes, hurricanes, windstorms or floods.

As the engineering team grows, we are looking to bring on board two Python Software Engineers! For the next few months – together with a team – they will be migrating in-house platform written in Python 2 to Python 3. When the migration is successful, enhancement and development projects will appear.

No risk, no fun? Not in that case!

Requirements

  • +2 years of commercial experience as a Python Developer,
  • Familiarity with Pandas, Numpy, ScikitLearn, and Jupyter,
  • Being comfortable with using English on a daily basis,
  • Practical knowledge of MongoDB and/or SQL would be a great advantage.

We offer

  • Ability to work with cutting-edge technology,
  • Brilliant international team,
  • A large amount of trust and lots of flexibility,
  • Private medical healthcare and Multisport cards to help you stay fit,
  • Comfortable workspace, free snacks, and goodies.

By choosing to apply you agree on

1. I hereby give consent to the processing of my personal data, other data contained in my application e.g. a photo attached to a CV (valid if there is a photo visible) and the CV for the needs of the current recruitment process conducted by OpsTalent spóka z o.o. sp.k. registered in the Register of Entrepreneurs of the National Court Register by the District Court for Wrocaw-Fabryczna in Wrocaw, VI Commercial Division, under the number KRS 0000564554; NIP: 899-27-69-445, REGON: 361866553.

This consent allows the processing of any additional data provided in the application, including the processing and sharing of personal data to IT service providers, as well as OpsTalent customers and business partners throughout the European Union for the purposes of current recruitment.

Providing data is voluntary but necessary for this purpose. Processing your data is lawful because it is necessary in order to take steps at the request of the data subject prior to entering into a contract (Article 6 point 1b of Regulation EU 2016/679 – GDPR).

2. If you want us to keep your CV in our database, add the following consent in the CV: “I agree with the processing by OpsTalent spóka z o.o. sp.k. registered in the Register of Entrepreneurs of the National Court Register by the District Court for Wrocaw-Fabryczna in Wrocaw, VI Commercial Division, under the number KRS 0000564554; NIP: 899-27-69-445, REGON: 361866553, personal data contained in my recruitment application for future recruitment purposes”  your profile will be stored in our database for a period of 2 years. This consent allows the processing of data provided in the application, including the processing and sharing of personal data to customers and partners of OpsTalent throughout the European Union in future recruitment processes.

3. Obligatory Information. The data administrator is OpsTalent spóka z o.o. sp.k. registered in the Register of Entrepreneurs of the National Court Register by the District Court for Wrocaw-Fabryczna in Wrocaw, VI Commercial Division, under the number KRS 0000564554; NIP: 899-27-69-445, REGON: 361866553.z with its registered office in Wrocaw, ul. lna 132. The Data Administrator can be contacted by email address [email protected] , contact form at www.opstalent.com, by phone on 71 7275700 or in writing to the address of the administrator’s office. Your personal data will be processed: a) in order to perform duties resulting from legal provisions related to the employment process, including in particular the Labor Code – the legal basis for processing is the legal obligation incumbent on the Administrator (Article 6 (1) c of the General Regulation on Personal Data Protection No. 2016 / 679 (Regulation 2016/679) in connection with the provisions of the Labor Code), b) in order to conduct the recruitment process for data not required by law – the legal basis for processing is consent (Article 6 (1) (a) of Regulation 2016/679), c) for purposes of conducting future recruitment processes, in case of consent to the processing of data for this purpose – the legal basis for processing is consent (Article 6 (1) (a) of Regulation 2016/679), d) to establish or pursue possible claims or defend against such claims by the Administrator – the legal basis for data processing is the legitimate interest of the Administrator (Article 6 (1) etter f of Regulation 2016/679). Your personal data may be transferred to entities that process personal data at the request of the Administrator: IT service providers. The data will be processed until you withdraw your consent to the processing of personal data or the expiry of a 2-year period. The period of storage of personal data may be extended each time for a period of limitation of claims if the processing of personal data will be necessary to seek possible claims or defend against such claims by the Administrator. You have the right to access your data and the right to demand rectification, deletion or restriction of their processing or the right to withdraw your consent at any time by providing a contact to the Administrator.

Product Analyst at Paxful

Paxful is a leading peer-to-peer powered bitcoin marketplace and a universal money translator. Our mission is social justice through financial freedom worldwide. By offering a platform with over 300 financial networks that empowers both merchants and buyers alike, we have created opportunities for millions across the globe who don’t have access to traditional banking services.

Paxful was founded in 2015 and has an established headquarters in New York, with offices in Estonia, Hong Kong, the Philippines and Johannesburg. Currently, we have over 160 dedicated employees globally and are growing rapidly. We have millions of users, a strong business model, and are completely bootstrapped. One of our pillars is giving back to the communities we help through initiatives such as #BuiltWithBitcoin. You’ll be joining an international team that seeks to make real, sustainable change in the world.

Paxful employees tend to have:

  • An open mind: We believe that change and new ideas are exciting, not threatening.
  • A proactive attitude: We’re willing and ready to roll up our sleeves and take responsibility.
  • Accountability: As colleagues, we take care of each other and our work.
  • Self-direction: We figure out solutions on our own and take charge of carrying them out.
  • An adaptive mindset: We shift our processes, perspectives, and working styles along with the environment.
  • Passion: We feel driven by being part of the mission.

Sound like a fit?

We are looking for thinkers who are passionate about creating something clear and precise, from idea to actionable result!

What you’ll be doing:

  • Provide simple yet detailed and clear specifications
  • Translate problems or requirements into highly specified project briefs
  • Understand the necessity of separation between high-end requirements and technical part
  • Spot corner cases before anybody else during problem statement and requirements phase
  • Work closely with key stakeholders, engineers, designers and a variety of end users to ensure technical compatibility and user satisfaction

What you’ll bring to the role:

  • 5+ years of experience in a related technical role
  • Ability to convert stakeholders’ problems or requirements into an actionable specification for related parties
  • Experience with SQL/noSQL databases
  • Experience with programming languages
  • Experience working with the Atlassian stack (Jira and Confluence)
  • Work experience with various data and analytics softwares
  • Ability to provide data-driven solutions and decisions
  • Experience working in a cryptocurrency, FinTech or blockchain company
  • Must be adept at handling multiple responsibilities at once; this is a role that requires someone who is quick and nimble

Ideally, you’ll also have:

  • Bachelor’s degree preferred
  • Startup experience
  • Strong written and oral communication skills
  • Attention to detail
  • Ability to work independently with light supervision

Perks:

  • Healthcare insurance, including dental and vision
  • Catered lunch and dinner daily, with premium snacks
  • Gym membership of your choice and personal training sessions
  • Sports nutrition and supplements, massages and chiropractor sessions
  • Training and professional development resources
  • Paid company events and retreats
  • Paid maternity/paternity leave including a one-time bonus to support newborn
  • Commuter benefits
  • Accessible office in the West Village
  • Flexible hours

Python Developer at Paxful


What you’ll be doing:

  • Write efficient, testable, and reusable code
  • Solve complex performance problems and architectural challenges
  • Work closely with our developers and product owners in an agile team
  • Help to troubleshoot, test and maintain the product
  • Follow company coding standards
  • Perform code reviews and mentor your peers
  • Cover your code with tests

What you’ll bring to this role:

  • At least 3 years of the development experience
  • Strong Python and OOP skills
  • Experience with microservices
  • Good knowledge of relational databases (MySQL, PostgreSQL)
  • Experience with frameworks like Django, Flask, aiohttp
  • Experience with NoSQL databases (MongoDB)
  • Working with the high-load systems
  • Understanding of security threats and “security by design” principles
  • Be ready to work in the fast-growing environment
  • Experience of working in a team
  • A desire to relocate to Tallinn, capital of Estonia. Tallinn is known for its medieval Old Town, sea and breathtaking green parks.
  • Good verbal and written English

Ideally, you’ll also have:

  • Interest in cryptocurrencies

Perks:

  • Catered lunch and dinner daily, with premium snacks
  • Gym membership of your choice and personal training sessions
  • Sports nutrition and supplements
  • Massage and chiropractic sessions
  • Training and professional development resources covered by company
  • Paid company events and retreats
  • One-time bonus to support newborn
  • Office in the city center with an amazing view of the Old Town
  • Flexible hours

ANALISTA PROGRAMADOR JAVA at Serikat

En Serikat estamos buscando un Analista Programador Java Senior, con conocimiento en desarrollo de micriservicios para trabajar en distintos proyectos de la compañía. Para empezar tenemos que desarrollar desde cero una plataforma web en el entorno funcional de la tecnología semántica a la que le incluiremos funcionalidades relacionadas con Machine/Deep Learning y NLP. Para seguir trabajaremos en proyectos de Blockchain y demás tecnologías punteras que nos marquen las tendencias del mercado.

Requerimos conocimientos en:

Java, Spring Boot

JavaScript

Microservicios: Docker, Kubernetes, Openshift

NoSQL

Rest, Graphql

SonarQube

Jenkins

Scrum

¡Únete a Serikat! Te ofrecemos:

– Incorporación a un equipo de trabajo joven, cualificado

– Estabilidad laboral con contrato indefinido desde el primer día.

– Negociaremos tu salario en función de tus expectativas salariales.

– Te proporcionaremos un lugar de trabajo muy bien ubicado y relacionado con transporte público y en el centro de la ciudad.

– Trabajamos por ampliar las políticas de conciliación laboral y familiar con permisos retribuidos justificados ilimitados. Horario habitual de oficina, con flexibilidad de entrada/salida, jornada intensiva los viernes y facilidades para realizar teletrabajo de forma puntual, más días de permiso de maternidad y paternidad, etc.

– Te facilitaremos todo tipo de permisos retribuidos justificados .

– Añadimos a la propuesta nuestros Planes de Retribución Flexible opcional del salario: tickets restaurante, guardería, transporte, formación y seguro médico.

DESARROLLADOR FULL STACK at SIGNE

¿Te gusta AWS? ¿Te gusta Serverless? ¿Te gusta el Blockchain? ¿Trabajar en cliente final?

Nuevos proyectos, desde CERO con tecnologías punteras, utilizando Lambdas, blockchain…

Definición de arquitecturas y utilización de metodologías ágiles.

Horario flexible y posibilidad de teletrabajar

Ubicación en Tres Cantos.

Salario a partir de 30.000 según experiencia.

Senior DevOps/Cloud Engineer (Kubernetes, AWS, Terraform) – Onsite or Remote at Source Coders Inc (allows remote)

Please note remote candidates must be living and eligible to work in the USA. Max salary for remote is $150K + performance bonus

Onsite locations can be San Francisco (CA), Des Moines (IA), or Champagne (IL)

We’re looking for a Senior DevOps Engineer to join our growing team. You will be an integral part of Granular’s success, and this is a unique opportunity to accelerate your career in a fast-paced environment with a team full of passionate, committed people who are excited to transform agriculture!

What You’ll Get To Do:

  • Partner with other engineers to identify the optimal cloud infrastructure, networking and storage design for each solution
  • Develop tooling to enable product development teams to build and deploy software as quickly and efficiently as possible
  • Collaborate daily with fellow team members to drive best practices and identify innovative strategies for successful delivery

Our Ideal Candidate:

  • Experience designing and building tooling and infrastructure for cloud platforms (AWS, Azure, GCE or similar).
  • Experience with Unix/Linux operating systems internals and administration
  • Strong programming expertise in Python (preferred) otherwise Go or Ruby
  • Experience with deployment and orchestration technologies – Kubernetes, Docker, Jenkins, Salt, etc
  • Demonstrated ability to implement robust, effective, and high quality solutions
  • Systematic problem-solving approach, coupled with strong communication skills and a sense of ownership and drive
  • Experience automating manual or time consuming processes
  • Experience managing Kubernetes clusters is highly preferred
  • Experience orchestrating build/deployment of complex, distributed applications is preferred
  • Experience with automated testing frameworks and methodology is preferred

Perks and Benefits:

  • Upward mobility. We are growing and need talent who can take on increasingly challenging and rewarding roles
  • Generous Vacation
  • 401k Matching Program
  • Employer sponsored Medical, Dental, and Vision
  • Vision, Dental and Dependent Care FSA
  • Family, Maternity and Paternity Leave
  • Learning and Development Programs
  • Open floor plan and dog-friendly offices

About Granular:

More than 7 billion people depend on farms for healthy and affordable food. By 2050, the global population will reach 9.4 billion and farmers will need new ways to deliver on this demand.  They’ll be seeking options that are economically viable and that will help them remain environmentally sustainable. Granular’s software meets this need, making farmers more efficient.

Granular combines the leadership and innovation of experienced entrepreneurs, advisors, and investors with the meaningful insights of farmers, agronomists, data scientists and engineers.  

Our internal team has the focused, innovative business and technical acumen that defines Silicon Valley; this expertise has produced products including Granular BusinessGranular AgronomyAcreValue, and AgStudio.

Founded in February 2014, and backed by leading VC’s like Andreessen Horowitz and Google Ventures, Granular is an independent subsidiary of Corteva, a spin off of DowDuPont™.  We currently have offices in San Francisco, CA, Champaign, IL, Johnston, IA, Cumming, GA and São Paulo, Brazil. 

Senior Rails Engineer (100% Remote or Onsite in SF) MyTime Series B SaaS Startup at Source Coders Inc (allows remote)

The Opportunity: Senior Rails Engineer

MyTime is based in SF and has a remote-friendly working environment with an excellent engineering culture. We’ve a team of 15 engineers who are based onsite in SF and spread across the US. We’re looking experience Ruby on Rails Engineers based in the US who want to join a 100% remote distributed team, or anyone who may be interested in relocating to SF.

This is a great opportunity to join a small and growing engineering team, where you will make a big impact on a multi-dimensional SaaS product that is used by millions of people each day. 

Preferred Qualifications

  • 3+ years of professional software engineering experience with Ruby on Rails
  • Experience working with relational databases such as MySQL or PostgreSQL
  • Some experience with Memcache and ElasticSearch is preferred
  • Some experience with AWS products (EC2, ECS, RDS, S3, ELB) is preferred
  • Comfortable writing test suites and specs in our test-driven environment

MyTime offers competitive salaries, an annual bonus, meaningful equity, strong equity package, full health benefits and a generous PTO policy

Web Developer – Full Stack at Radix DLT (London, UK)

Description:

The Web Developer will be responsible for building our website from concept all the way to completion from the bottom up, fashioning everything from the home page to site layout and function.

The Web Developer will be passionate about developing a robust website and web applications that push web technologies right to the very edge of what’s possible; from both the server-side, front-end and design.

Your role will be to build engaging online experiences, powered by a robust yet flexible content management system that can be easily used in house by other members of the team.

Responsibilities:

  • Front-end and back-end development of website and web applications
  • Produce and review high quality clean code. Utilize a wide range of web technologies surrounding PHP like wordpress
  • Develop, update and maintain multiple responsive websites and web applications
  • Optimize websites design and performance across a variety of modern devices
  • Create banners, web pages and mobile applications based on designs provided by our Creative Lead. 
  • Translate wireframes and mock-ups into fully functioning websites and landing pages
  • Review project objectives and determine best technology for implementation.
  • Implement best practice standards for development and deployment of code and applications.
  • Stay up-to-date on emerging technologies.
  • Attend project meetings and ensure user experience best practices are front of mind
  • Supporting team members to achieve deadlines
  • Create banners, web pages and mobile applications based on designs provided by our designer.
  • Understanding and implementation of website data security and encryption.

Experience and Knowledge 

  • Interest on DLT/Blockchain Technologies
  • Likes to solve challenging problems.
  • Minimum 3 years Web Development experience.
  • Experience in Implementing new functionalities
  • Experience of development of new projects and prototypes
  • Knowledge of responsive web design principles on all devices
  • Good understanding of fundamental UX & UI principles
  • Able to easily implement designs from our designer via Adobe Creative Suite (Photoshop, XD, Illustrator) files.
  • Have good interpersonal and communication skills
  • SEO Marketing skillsKnowledge and experience with Cloud Computing Services (AWS, Microsoft Azure, etc)

Skills 

Must have:

  • Web fundamentals like HTML, JavaScript, and CSS
  • Front-end (CSS) frameworks like Foundation or Bootstrap 
  • Web fundamentals like HTML, JavaScript, and CSS
  • RESTful Services
  • Web server technologies like Node.js, J2EE, Apache, Nginx, ISS, etc
  • Familiar with JavaScript Libraries (jQuery, Vue, Angular)
  • Knowledge of git, branching, continuous integration.
  • Good understanding of fundamental UX & UI principles

Desirable:

  • CSS preprocessors like Sass or LESS
  • JavaScript frameworks like vue, AngularJS, React, or Ember, etc., 
  • or JS-based build tools like Grunt, Gulp, and Bower
  • Libraries like jQuery or Backbone.js
  • Front-end (CSS) frameworks like Foundation or Bootstrap
  • AJAX
  • Server-side languages like PHP, Python, Ruby, Java, JavaScript, and .Net
  • Database technologies like MySQL, Oracle, PostgreSQL, and MongoDB.
  • Frameworks related to their server-side language of choice like: Express.js, Ruby on Rails, CakePHP, etc.
  • Experience with WordPress ecosystem, themes and plugins