Fullstack Developer (Ruby on Rails)

🏢 Summary: Full Stack Developer (Ruby on Rails) role in an R&D team building a scalable SaaS platform for laboratory data management and AI-powered research tools. The position focuses on developing and maintaining full-stack features with strong emphasis on performance, scalability, and code quality. You will work on multi-tenant and on-premise deployments in a collaborative, agile environment. 🗂️ Requirements: 3+ years frontend development experience in large-scale web applications, Strong proficiency in React, Strong proficiency in JavaScript, Strong proficiency in HTML, Strong proficiency in CSS, Practical experience with Ruby on Rails and ability to work with existing codebases, Degree in Computer Science or equivalent experience 📃 Skills: React, JavaScript, HTML, CSS, Ruby, Rails, TDD, APIs, SaaS, AWS, Docker, MySQL, ElasticSearch, Redux, Lit, CICD, AI 🏢 Description: 📍 Location: Wrocław, Poland (Hybrid) 📅 Employment Type: Full-time, B2B (up to 18.000PLN net monthly)/CoE (up to 14.000PLN gross monthly) 🏢 We are hiring for our client (life sciences / SaaS R&D domain) About the Project We are currently looking for an experienced Full Stack Developer (Ruby on Rails) on behalf of our client — an innovative company operating in the life sciences sector. You will join an R&D team working on a cutting-edge platform used by scientists and research organizations worldwide. The platform focuses on laboratory data management, workflow automation, and AI-powered tools that support research and production processes. Responsibilities Design and implement new features across the full stack Develop and maintain platform APIs with a strong focus on scalability, reliability, and performance Write clean, well-tested, and maintainable code following TDD and iterative practices Collaborate closely with product and business teams to translate requirements into technical solutions Contribute to building scalable solutions deployed as: multi-tenant SaaS single-tenant SaaS on-premise systems Ensure application security, performance optimization, and system scalability Leverage AI-assisted tools to accelerate development, testing, and code quality Actively contribute to team collaboration and a positive engineering culture Requirements ✅ Must-have At least 3 years of frontend development experience in large-scale web applications Strong proficiency with: React JavaScript HTML / CSS Practical familiarity with Ruby on Rails (ability to read and contribute to existing codebases) Degree in Computer Science or equivalent experience ✅ Nice to have Experience with: Redux Toolkit / Lit AWS / CI/CD pipelines Docker MySQL ElasticSearch Experience using AI tools in development (e.g., coding assistants, automated testing, code review) Exposure to integrating AI workflows into the SDLC Candidate Profile Strong team player with excellent communication skills (technical and non-technical) Comfortable working in a fast-paced, agile environment Opinionated about code quality and technology usage, while remaining pragmatic Passionate about building meaningful products Open to adopting AI tools as part of daily development workflows Hays Poland sp. z o.o. jest agencją zatrudnienia zarejestrowaną w rejestrze prowadzonym przez Marszałka Województwa Mazowieckiego pod numerem 361.

🏢 Summary: Full Stack Developer (Ruby on Rails) role in an R&D team building a scalable laboratory data management and AI-powered SaaS platform for the life sciences sector. The position involves developing and maintaining full-stack features, APIs, and scalable deployments across multi-tenant, single-tenant, and on-premise environments. The focus is on high-quality, secure, and performant web applications developed using TDD and modern engineering practices. 🗂️ Requirements: Minimum 3 years frontend development experience in large-scale web applications, Strong proficiency in React, Strong proficiency in JavaScript, Strong proficiency in HTML, Strong proficiency in CSS, Practical experience with Ruby on Rails, Ability to develop and maintain APIs, Experience writing tested and maintainable code (TDD), Degree in Computer Science or equivalent experience 📃 Skills: React, JavaScript, HTML, CSS, Ruby, Rails, API, TDD, SaaS, AWS, Docker, MySQL, ElasticSearch, CI/CD, Redux, Lit 🏢 Description: 📍 Location: Wrocław, Poland (Hybrid) 📅 Employment Type: Full-time, B2B (up to 18.000PLN net monthly)/CoE (up to 14.000PLN gross monthly) 🏢 We are hiring for our client (life sciences / SaaS R&D domain) About the Project We are currently looking for an experienced Full Stack Developer (Ruby on Rails) on behalf of our client — an innovative company operating in the life sciences sector. You will join an R&D team working on a cutting-edge platform used by scientists and research organizations worldwide. The platform focuses on laboratory data management, workflow automation, and AI-powered tools that support research and production processes. Responsibilities Design and implement new features across the full stack Develop and maintain platform APIs with a strong focus on scalability, reliability, and performance Write clean, well-tested, and maintainable code following TDD and iterative practices Collaborate closely with product and business teams to translate requirements into technical solutions Contribute to building scalable solutions deployed as: multi-tenant SaaS single-tenant SaaS on-premise systems Ensure application security, performance optimization, and system scalability Leverage AI-assisted tools to accelerate development, testing, and code quality Actively contribute to team collaboration and a positive engineering culture Requirements ✅ Must-have At least 3 years of frontend development experience in large-scale web applications Strong proficiency with: React JavaScript HTML / CSS Practical familiarity with Ruby on Rails (ability to read and contribute to existing codebases) Degree in Computer Science or equivalent experience ✅ Nice to have Experience with: Redux Toolkit / Lit AWS / CI/CD pipelines Docker MySQL ElasticSearch Experience using AI tools in development (e.g., coding assistants, automated testing, code review) Exposure to integrating AI workflows into the SDLC Candidate Profile Strong team player with excellent communication skills (technical and non-technical) Comfortable working in a fast-paced, agile environment Opinionated about code quality and technology usage, while remaining pragmatic Passionate about building meaningful products Open to adopting AI tools as part of daily development workflows Hays Poland sp. z o.o. jest agencją zatrudnienia zarejestrowaną w rejestrze prowadzonym przez Marszałka Województwa Mazowieckiego pod numerem 361.

🏢 Summary: Development role in an international team building a modern SaaS platform for the life science sector, focused on data management, process automation, and research tools. The position involves designing and developing a web application and APIs using Ruby on Rails, contributing to architecture decisions, and optimizing system performance and scalability. Work is carried out in an Agile environment with real impact on a global product. 🗂️ Requirements: Minimum 3 years of experience with Ruby on Rails, Experience building web applications, Experience with JavaScript, HTML, CSS, Experience designing and integrating APIs, Experience with AWS, Experience with CI/CD pipelines, Experience with Git version control, English proficiency at B2 level or higher, Availability for onsite onboarding (first 2 weeks) 📃 Skills: Ruby, Rails, JavaScript, HTML, CSS, API, AWS, CI/CD, Git, MySQL, Docker, ElasticSearch, Hotwire, React 🏢 Description: Dołącz do międzynarodowego zespołu pracującego nad nowoczesną platformą SaaS wykorzystywaną w obszarze life science. Projekt dotyczy rozwiązań wspierających zarządzanie danymi, automatyzację procesów oraz rozwój narzędzi badawczych wykorzystywanych przez organizacje na całym świecie. Lokalizacja biura: Wrocław. Model pracy: zdalnie w większości czasu pracy (praca z biura 1 raz na 2 tygodnie). Stack technologiczny projektu: Ruby on Rails, JavaScript, Hotwire / React, API, MySQL, AWS, Git, CI/CD, Docker, ElasticSearch . Zespół: liczy obecnie ok. 5 osób i działa w środowisku międzynarodowym. Zespół zlokalizowany jest częściowo w Polsce (Wrocław), Norwegii i Izraelu. Zakres obowiązków: Projektowanie i rozwój aplikacji webowej w Ruby on Rails Tworzenie i rozwój API platformy Implementacja nowych funkcjonalności oraz rozwój istniejących modułów Dbanie o jakość kodu (testy, utrzymanie, refaktoryzacja) Współpraca z zespołem produktowym oraz interesariuszami biznesowymi Udział w projektowaniu architektury i podejmowaniu decyzji technologicznych Optymalizacja wydajności oraz skalowalności systemu Wykorzystanie narzędzi AI wspierających proces developmentu (np. code review, generowanie kodu, testy) Praca w środowisku Agile w międzynarodowym zespole Główne wymagania: Minimum 3 lata doświadczenia w tworzeniu aplikacji webowych w Ruby on Rails Doświadczenie w pracy z JavaScript, HTML, CSS Znajomość pracy z API (projektowanie, integracje) Doświadczenie z AWS oraz CI/CD Doświadczenie z systemami kontroli wersji (Git) Znajomość języka angielskiego na poziomie min. B2 Umiejętność pracy w zespole oraz komunikacji w środowisku międzynarodowym Samodzielność, odpowiedzialność za realizowane zadania Gotowość do pracy stacjonarnej podczas onboardingu (2 pierwsze tygodnie pracy) Mile widziane: Doświadczenie z Hotwire lub React Doświadczenie z Docker, MySQL, ElasticSearch Doświadczenie w projektach SaaS Doświadczenie z narzędziami AI wspierającymi development Znajomość domeny life science Wyższe wykształcenie w obszaru nauk przyrodniczych Firma oferuje: Stałą, długofalową współpracę w oparciu o kontrakt B2B (+25 dni płatnego urlopu) Pracę zdalną w większości czasu pracy (praca z biura we Wrocławiu 1 raz na 2 tygodnie) Udział w rozwoju globalnego produktu technologicznego Pracę w międzynarodowym środowisku Realny wpływ na rozwój systemu oraz decyzje technologiczne Stabilny, długoterminowy projekt produktowy Kartę Multisport Pracę w zespole nastawionym na współpracę i dzielenie się wiedzą

🏢 Summary: The offer is for a Ruby on Rails Developer to build and maintain modern web applications for a new project, contributing to scalable solutions and microservices architecture. The role involves working with Ruby on Rails as the core technology, with exposure to Node.js and React, in a collaborative and agile environment. 🗂️ Requirements: Proven commercial experience with Ruby on Rails, Experience building modern web applications, Experience with Node.js and/or React, Understanding of microservices architecture, Ability to participate in code reviews and follow coding standards, Very good English skills 📃 Skills: Ruby, Rails, Node.js, React, Microservices, REST, Git 🏢 Description: We are seeking a skilled Ruby on Rails Developer to join our team for an exciting new project. Responsibilities Develop and maintain web applications using Ruby on Rails as the primary technology. Collaborate with cross-functional teams to design and implement scalable solutions. Contribute to the architecture and development of microservices, where applicable. Utilize Node.js and React technologies to enhance application features and performance. Participate in code reviews and ensure adherence to best practices and coding standards. Communicate effectively with stakeholders to understand project requirements and deliver solutions accordingly. Qualifications Proven commercial experience in Ruby on Rails development. Experience working with modern web applications and frameworks. Exposure to Node.js and/or React technologies. Understanding of microservices architecture is preferred. Strong problem-solving skills and ability to work collaboratively within a team setting. Very good English level. Benefits Opportunity to participate in a cutting-edge project with a dynamic and innovative team. Professional growth through engagement in technical interviews and project development phases. Remote work (Poland). Exposure to a diverse technology stack including Ruby on Rails, Node.js, React, and microservices. Unique TEAL culture, relationship- and respect-driven community, non-corporate atmosphere. Agile approach and no bureaucracy. Outstanding integration trips to various places in Europe for all employees. Activities to support your well-being and health. Luxmed Gold Extended medical care and Multisport Plus benefit.

🏢 Summary: Senior Ruby on Rails Developer role focused on building and evolving a cloud-ready product into a scalable, distributed system. The position involves designing architecture, developing core services and APIs, and driving Kubernetes-based deployments with CI/CD automation. You will influence engineering standards and contribute production-ready code in a greenfield development environment. 🗂️ Requirements: 5+ years of software engineering experience, Senior-level Ruby on Rails expertise, Experience building and scaling distributed systems, Knowledge of Kubernetes, Experience with CI/CD pipelines, Experience with Infrastructure as Code, Strong API design skills, Experience with microservices communication, Ability to lead architectural initiatives, Mentoring experience for engineers 📃 Skills: Ruby, Rails, Kubernetes, CI/CD, IaC, API, Microservices, DistributedSystems 🏢 Description: We are looking for an experienced Senior Ruby on Rails Developer to join the team responsible for development of the product, which is evolving into a modern, cloud‑ready solution. In this role, you will have opportunity to influence architectural decisions, contribute production‑ready code, and collaborate closely with cross‑functional teams. Your daily responsibilities: Build and improve core platform services and APIs Design scalable, distributed system architecture Implement and optimize key components in the codebase Set engineering standards for reliability and maintainability Drive deployments using Kubernetes and CI/CD automation Collaborate across teams to align technical and product goals. Requirements: 5+ years of software engineering experience, including senior‑level work Strong proficiency in Ruby on Rails Experience building and scaling distributed systems Solid knowledge of Kubernetes, CI/CD, and IaC Strong skills in API design and microservice communication Ability to lead architectural initiatives and mentor other engineers. What we offer: Attractive salary and benefits package, including Multisport card, insurance, and medical care Hybrid work from the Krakow office International work environment in a product company Training and development opportunities within the organization Joining the greefield project with pure development. Apply now!

🏢 Summary: Senior/Lead Ruby on Rails role focused on leading backend architecture and development while supporting frontend integration with React. The position involves driving technical direction, ensuring scalability and performance, and maintaining high code quality across the project. The role also acts as a technical point of contact aligning engineering outcomes with business goals. 🗂️ Requirements: Mastery of Ruby on Rails, Expert-level Ruby proficiency, Experience designing scalable backend architectures, Experience with React, Proven experience leading technical projects or modules, Ability to conduct code reviews and enforce best practices 📃 Skills: Ruby, Rails, React, Backend, Architecture, REST, Git, SQL 🏢 Description: We are looking for a high-level Ruby on Rails Expert to take a key role in the development team. This position is designed for someone who excels in backend architecture but can also navigate the frontend landscape when needed. As a Senior or Lead Developer, you will be responsible for the technical direction of the project, ensuring high performance, and maintaining a robust codebase while communicating effectively with international stakeholders. Responsibilities Technical Leadership: Leading the backend development lifecycle using Ruby on Rails . Architecture: Designing and implementing scalable, secure, and maintainable backend services. Full-stack Support: Collaborating on the frontend layer, specifically with React (experience here is a big plus). Code Quality: Conducting code reviews, mentoring team members, and establishing best development practices. Communication: Acting as a technical point of contact, ensuring clear alignment between technical goals and business needs. Requirements Expertise: Mastery of Ruby on Rails and the Ruby language. Frontend: Practical experience with React (highly desirable). Ownership: Proven ability to lead projects or significant technical modules. Soft Skills: Proactive attitude, strong problem-solving skills, and a "Lead" mindset.

🏢 Summary: Hybrid Software Engineer role focused on developing and maintaining a scalable Ruby on Rails platform, building APIs, and delivering secure, high-performance solutions. The position involves implementing new features, supporting integrations with external partners, and contributing to agile development processes. The engineer will also take ownership of services and support ongoing platform reliability. 🗂️ Requirements: Minimum 3 years of professional experience as a Software Engineer, Proficiency in Ruby on Rails, Experience developing and managing APIs, Familiarity with React, Knowledge of JavaScript or TypeScript, Ability to work in a hybrid environment (Warsaw-based), Advanced written and spoken English 📃 Skills: Ruby, Rails, API, React, JavaScript, TypeScript, GraphQL 🏢 Description: Our Client, an American software company is opening a new branch in Warsaw and we are looking for a Software Engineer with Ruby to join a growing team. About the Position This role focuses on enhancing and maintaining a robust platform, supporting new project initiatives, and delivering scalable solutions that improve the user experience for both industry professionals and individual clients. The ideal candidate is proactive, collaborative, and committed to delivering high-quality, scalable software. This is a hybrid role based in Warsaw, Poland. Key Responsibilities Design and implement new functionalities for a cutting-edge platform Develop and manage APIs to enable smooth integration with financial and sales partners Build secure and scalable services designed for sustained performance Support agile development practices and help ensure consistent, impactful sprint results Mentor team members and contribute to a positive engineering culture through knowledge-sharing Maintain and take responsibility for services you develop, including participating in the on-call rotation Requirements Minimum 3 years of professional experience as a Software Engineer good proficiency with Ruby on Rails Excellent communication skills and experience working in cross-functional teams Familiarity with React and component-based front-end frameworks Knowledge of JavaScript and/or TypeScript Ability to perform in a hybrid (office/remote) work environment Advanced written and spoken English (please provide your CV in English) Nice to have Experience with GraphQL

🏢 Summary: Senior Ruby Developer role focused on building and maintaining scalable Ruby on Rails web applications with strong PostgreSQL and testing expertise in a hybrid work model in Poland. The position involves architecture contributions, performance optimization, production support, and collaboration with cross-functional teams. The offer includes flexible work arrangements, career development programs, certifications, and comprehensive benefits. 🗂️ Requirements: 3+ years of experience with Ruby and Rails, Experience building scalable web applications, Hands-on expertise with PostgreSQL, Experience with query optimization and direct SQL usage, Experience with RSpec, Knowledge of TDD/BDD practices, Ability to work independently, English level B2 or higher 📃 Skills: Ruby, Rails, PostgreSQL, SQL, RSpec, TDD, BDD, Docker, Redis, ClickHouse, JavaScript, React, Angular, Vue, Sidekiq, RabbitMQ, CI/CD, Git 🏢 Description: We are looking for a Senior Ruby Developer to join our dynamic and collaborative team. The client is an American multinational enterprise specializing in software solutions, offering a cloud-based platform that facilitates the seamless automation, integration, and coordination of artificial intelligence (AI) functionalities across a wide range of applications, data environments, and IT systems. It is a hybrid position with required visits to the office in Wroclaw, Krakow, Gdansk, Warsaw, Katowice, Lodz or Poznan. Responsibilities Develop and maintain scalable, high-performance web applications using Ruby and Rails Optimize complex database queries and ensure efficient use of PostgreSQL Design and implement clean, maintainable code with strong adherence to TDD/BDD principles using RSpec Collaborate with cross-functional teams to define and deliver technical solutions that align with business goals Conduct code reviews and mentor junior developers to uphold quality standards Address scalability and performance issues, implementing enhancements to improve reliability Work closely with product owners to translate requirements into technical implementations Debug and troubleshoot production issues, identifying root causes and implementing responsive fixes Participate in architectural design and contribute to long-term system improvements Oversee deployment processes and ensure application stability in production environments Stay updated on emerging technologies and practices to bring innovative solutions to the team Requirements Strong experience with Ruby and the Rails ecosystem (3+ years) Proven ability to build scalable web applications Deep hands-on expertise in PostgreSQL, including query optimization and direct SQL usage Solid experience with RSpec and TDD/BDD testing practices Comfortable working independently with minimal supervision English level of minimum B2 (Upper-Intermediate) for effective communication Nice to have Experience using Docker for containerization Familiarity with Redis for caching or real-time data handling Exposure to ClickHouse for analytics or event logging Basic frontend experience with JavaScript and frameworks like React, Angular, or Vue.js Experience with background job processing tools like Sidekiq or RabbitMQ Understanding of CI/CD pipelines and Git-based workflows Good communication and collaboration skills We offer We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Senior Ruby Developer role focused on building and maintaining scalable Ruby on Rails web applications with strong emphasis on PostgreSQL optimization, testing practices, and system reliability. The position involves collaboration with cross-functional teams, mentoring developers, and contributing to architectural improvements in a hybrid work model across multiple cities in Poland. The offer includes flexible work arrangements, professional development programs, certifications, and comprehensive benefits. 🗂️ Requirements: 3+ years of experience with Ruby and Rails, Experience building scalable web applications, Hands-on expertise in PostgreSQL, Query optimization and direct SQL usage, Experience with RSpec, Knowledge of TDD/BDD testing practices, Ability to work independently, English level B2 or higher 📃 Skills: Ruby, Rails, PostgreSQL, SQL, RSpec, TDD, BDD, Docker, Redis, ClickHouse, JavaScript, React, Angular, Vue, Sidekiq, RabbitMQ, CI/CD, Git, AWS, Azure, GCP 🏢 Description: We are looking for a Senior Ruby Developer to join our dynamic and collaborative team. The client is an American multinational enterprise specializing in software solutions, offering a cloud-based platform that facilitates the seamless automation, integration, and coordination of artificial intelligence (AI) functionalities across a wide range of applications, data environments, and IT systems. It is a hybrid position with required visits to the office in Wroclaw, Krakow, Gdansk, Warsaw, Katowice, Lodz or Poznan. Responsibilities Develop and maintain scalable, high-performance web applications using Ruby and Rails Optimize complex database queries and ensure efficient use of PostgreSQL Design and implement clean, maintainable code with strong adherence to TDD/BDD principles using RSpec Collaborate with cross-functional teams to define and deliver technical solutions that align with business goals Conduct code reviews and mentor junior developers to uphold quality standards Address scalability and performance issues, implementing enhancements to improve reliability Work closely with product owners to translate requirements into technical implementations Debug and troubleshoot production issues, identifying root causes and implementing responsive fixes Participate in architectural design and contribute to long-term system improvements Oversee deployment processes and ensure application stability in production environments Stay updated on emerging technologies and practices to bring innovative solutions to the team Requirements Strong experience with Ruby and the Rails ecosystem (3+ years) Proven ability to build scalable web applications Deep hands-on expertise in PostgreSQL, including query optimization and direct SQL usage Solid experience with RSpec and TDD/BDD testing practices Comfortable working independently with minimal supervision English level of minimum B2 (Upper-Intermediate) for effective communication Nice to have Experience using Docker for containerization Familiarity with Redis for caching or real-time data handling Exposure to ClickHouse for analytics or event logging Basic frontend experience with JavaScript and frameworks like React, Angular, or Vue.js Experience with background job processing tools like Sidekiq or RabbitMQ Understanding of CI/CD pipelines and Git-based workflows Good communication and collaboration skills We offer We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Senior Ruby Developer role focused on building and maintaining scalable web applications using Ruby on Rails in a hybrid work model in Poland. The position involves backend development, database optimization, testing with TDD/BDD practices, architectural contributions, and collaboration with cross-functional teams. The offer includes flexible work arrangements, professional development opportunities, and comprehensive benefits. 🗂️ Requirements: 3+ years of experience with Ruby and Rails, Experience building scalable web applications, Hands-on expertise in PostgreSQL, Experience with query optimization and direct SQL usage, Experience with RSpec, Knowledge of TDD/BDD testing practices, Ability to work independently with minimal supervision, English level B2 or higher 📃 Skills: Ruby, Rails, PostgreSQL, SQL, RSpec, TDD, BDD, Docker, Redis, ClickHouse, JavaScript, React, Angular, Vue, Sidekiq, RabbitMQ, CI/CD, Git, AWS, Azure, GCP 🏢 Description: We are looking for a Senior Ruby Developer to join our dynamic and collaborative team. The client is an American multinational enterprise specializing in software solutions, offering a cloud-based platform that facilitates the seamless automation, integration, and coordination of artificial intelligence (AI) functionalities across a wide range of applications, data environments, and IT systems. It is a hybrid position with required visits to the office in Wroclaw, Krakow, Gdansk, Warsaw, Katowice, Lodz or Poznan. Responsibilities Develop and maintain scalable, high-performance web applications using Ruby and Rails Optimize complex database queries and ensure efficient use of PostgreSQL Design and implement clean, maintainable code with strong adherence to TDD/BDD principles using RSpec Collaborate with cross-functional teams to define and deliver technical solutions that align with business goals Conduct code reviews and mentor junior developers to uphold quality standards Address scalability and performance issues, implementing enhancements to improve reliability Work closely with product owners to translate requirements into technical implementations Debug and troubleshoot production issues, identifying root causes and implementing responsive fixes Participate in architectural design and contribute to long-term system improvements Oversee deployment processes and ensure application stability in production environments Stay updated on emerging technologies and practices to bring innovative solutions to the team Requirements Strong experience with Ruby and the Rails ecosystem (3+ years) Proven ability to build scalable web applications Deep hands-on expertise in PostgreSQL, including query optimization and direct SQL usage Solid experience with RSpec and TDD/BDD testing practices Comfortable working independently with minimal supervision English level of minimum B2 (Upper-Intermediate) for effective communication Nice to have Experience using Docker for containerization Familiarity with Redis for caching or real-time data handling Exposure to ClickHouse for analytics or event logging Basic frontend experience with JavaScript and frameworks like React, Angular, or Vue.js Experience with background job processing tools like Sidekiq or RabbitMQ Understanding of CI/CD pipelines and Git-based workflows Good communication and collaboration skills We offer We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.