Senior Ruby on Rails Developer

🏢 Summary: B2B contract for a Ruby on Rails Developer to build and maintain a client platform, implement new features, and ensure performance and reliability in a remote or hybrid setup. The role involves backend development with Rails, testing, database management, and occasional frontend support with React. You will collaborate in an Agile team to deliver high-quality, production-ready solutions. 🗂️ Requirements: 3+ years experience with Ruby on Rails, Knowledge of Active Record, Knowledge of RSpec, Experience with production applications, Familiarity with relational databases, Experience writing unit and integration tests, Understanding of MVC architecture, Basic experience with React, Understanding of REST API principles, English B2 level minimum, Polish B2 level minimum, Familiarity with Agile methodologies 📃 Skills: Ruby, Rails, ActiveRecord, RSpec, PostgreSQL, React, REST, AWS, Heroku, Scrum, Kanban, MVC 🏢 Description: About us LLInformatics is a forward-thinking IT consulting firm, trusted by clients across Europe and North America. We specialize in delivering complex projects on time, with exceptional quality, and always meeting the highest compliance standards. Our remote-first team of 130+ experts is passionate about building cutting-edge digital products that drive real results. With a focus on data-driven decisions, measurable outcomes, and a strategic mindset, we’re raising the bar in our industry—backed by a strong, collaborative work culture that fuels our success. Contract Type: B2B Location: Remote or in our Warsaw office Your Tasks and Responsibilities: Implementing new features on our client’s platform. Solving programming challenges and continuously developing your skills. Participating in code reviews and collaborating with team members. Maintaining the existing codebase and fixing bugs. Writing unit and integration tests (E2E is a plus). Supporting frontend development using React when needed. Contributing to product improvements through experimentation and iteration. Taking care of application performance and reliability. Collaborating with Product Managers and team members to deliver high-quality solutions. Requirements: 3+ years of experience with Ruby on Rails. Good knowledge of Active Record and RSpec. Experience working with production applications (AWS or Heroku is a plus). Familiarity with relational databases (e.g., PostgreSQL). Experience writing tests and understanding of testing best practices. Understanding of the MVC pattern or similar architectures. Basic experience with React (components, API integration). Understanding of REST API principles. English and Polish at a minimum B2 level. Familiarity with Agile methodologies (Scrum, Kanban). Nice to have: Experience with distributed systems. Interest in using AI tools to improve development workflow. Why join us? Flexible Working Hours – We focus on results! Manage your time, keep your team informed about your availability, and attend key meetings. Work from Anywhere – Choose your ideal setup! Work 100% remotely within the EU , go hybrid , or enjoy our Warsaw office , fully equipped for productivity. Comprehensive Onboarding – From day one, we ensure you feel comfortable and supported, so you can quickly become part of the team. Flat Structure – We value initiative and open communication. Every voice matters here! Positive Company Culture & Team Spirit – We create an environment where everyone feels appreciated and comfortable. Modern Work Methods – We use cutting-edge project management techniques inspired by the IT world. Transparent Communication – Regular 360° feedback sessions and mentor support to help you grow. Top-Notch Equipment – Get a MacBook for your work. If you choose to work from our Warsaw office , you'll also have access to a 34” (16:9) widescreen monitor and an ergonomic standing desk . Weekly English Lessons – Optional classes with a native speaker to help you improve your skills.

🏢 Summary: Senior Ruby on Rails Developer responsible for building and maintaining production-grade server-side applications, implementing new features, and ensuring high code quality through testing and reviews. The role involves working with AWS-based environments, optimizing performance and scalability, and contributing to frontend components in React. The position requires close collaboration with cross-functional teams in a remote or hybrid setup. 🗂️ Requirements: 6+ years of experience with Ruby on Rails, Experience with Active Record and RSpec, Experience with AWS or Heroku in production environments, Experience with PostgreSQL or other RDBMS, Experience writing unit, integration, and E2E tests, Experience with TDD or strong testing practices, Experience building applications using MVC pattern, Experience building React components and integrating APIs, Understanding of distributed systems, Experience designing and consuming REST APIs, Knowledge of Agile methodologies (Scrum or Kanban), Polish and English at minimum B2 level 📃 Skills: Ruby, Rails, ActiveRecord, RSpec, AWS, Heroku, PostgreSQL, RDBMS, React, REST, MVC, TDD, Scrum, Kanban 🏢 Description: About us LLInformatics is a forward-thinking IT consulting firm, trusted by clients across Europe and North America. We specialize in delivering complex projects on time, with exceptional quality, and always meeting the highest compliance standards. Our remote-first team of 130+ experts is passionate about building cutting-edge digital products that drive real results. With a focus on data-driven decisions, measurable outcomes, and a strategic mindset, we’re raising the bar in our industry—backed by a strong, collaborative work culture that fuels our success. Contract Type: B2B Location: Remote or in our Warsaw office Your Tasks and Responsibilities: Implementing new functionalities on our client’s platform. Solving complex programming challenges while improving your knowledge. Conducting regular code reviews / PR reviews for your colleagues. Maintaining existing code and fixing bugs. Writing unit, integration, and E2E tests. Contributing to frontend components using React when needed. Supporting rapid iteration, experimentation, and data-driven development initiatives. Optimizing application performance, reliability, and scalability. Collaborating with Product Managers and cross-functional teams to align engineering execution with product vision. Requirements: 6+ years of experience in Ruby on Rails. Familiarity with Active Record and RSpec. Experience working on production applications in AWS or Heroku. Experience working with RDBMS like PostgreSQL. Experience writing tests / following a TDD approach or strong testing culture. Experience building server-side applications using the MVC pattern or similar. React experience (building components, integrating APIs). Understanding distributed systems and resilient applications. Practical knowledge of REST API communication. Polish and English at B2+ minimum level. Familiarity with Agile methodologies (Scrum, Kanban). Experience as a tech team lead is a strong plus. Demonstrated ability to leverage AI tools to improve workflows or development efficiency is a plus. Why join us? Flexible Working Hours – We focus on results! Manage your time, keep your team informed about your availability, and attend key meetings. Work from Anywhere – Choose your ideal setup! Work 100% remotely within the EU , go hybrid , or enjoy our Warsaw office , fully equipped for productivity. Comprehensive Onboarding – From day one, we ensure you feel comfortable and supported, so you can quickly become part of the team. Flat Structure – We value initiative and open communication. Every voice matters here! Positive Company Culture & Team Spirit – We create an environment where everyone feels appreciated and comfortable. Modern Work Methods – We use cutting-edge project management techniques inspired by the IT world. Transparent Communication – Regular 360° feedback sessions and mentor support to help you grow. Top-Notch Equipment – Get a MacBook for your work. If you choose to work from our Warsaw office , you'll also have access to a 34” (16:9) widescreen monitor and an ergonomic standing desk . Weekly English Lessons – Optional classes with a native speaker to help you improve your skills.

🏢 Summary: B2B contract for a Senior Ruby on Rails Developer to build and enhance a client platform, focusing on backend development, testing, performance optimization, and occasional React frontend work. The role involves solving complex engineering challenges, conducting code reviews, and collaborating with cross-functional teams in a remote-first environment. Emphasis is placed on scalable, reliable systems and data-driven product development. 🗂️ Requirements: 5+ years Ruby on Rails experience, Strong knowledge of ActiveRecord, Experience with RSpec, Experience with AWS or Heroku in production, Experience with PostgreSQL or other RDBMS, Experience with TDD and automated testing, Experience building MVC-based server-side applications, Experience building React components and integrating APIs, Understanding of distributed systems, Practical knowledge of REST APIs, B2+ level Polish and English, Experience with Agile methodologies 📃 Skills: Ruby, Rails, ActiveRecord, RSpec, AWS, Heroku, PostgreSQL, RDBMS, TDD, MVC, React, REST, Scrum, Kanban 🏢 Description: About us LLInformatics is a forward-thinking IT consulting firm, trusted by clients across Europe and North America. We specialize in delivering complex projects on time, with exceptional quality, and always meeting the highest compliance standards. Our remote-first team of 130+ experts is passionate about building cutting-edge digital products that drive real results. With a focus on data-driven decisions, measurable outcomes, and a strategic mindset, we’re raising the bar in our industry—backed by a strong, collaborative work culture that fuels our success. Contract Type: B2B Location: Remote or in our Warsaw office Your Tasks and Responsibilities: Implementing new functionalities on our client’s platform. Solving complex programming challenges while improving your knowledge. Conducting regular code reviews / PR reviews for your colleagues. Maintaining existing code and fixing bugs. Writing unit, integration, and E2E tests. Contributing to frontend components using React when needed. Supporting rapid iteration, experimentation, and data-driven development initiatives. Optimizing application performance, reliability, and scalability. Collaborating with Product Managers and cross-functional teams to align engineering execution with product vision. Requirements: 5+ years of experience in Ruby on Rails. Familiarity with Active Record and RSpec. Experience working on production applications in AWS or Heroku. Experience working with RDBMS like PostgreSQL. Experience writing tests / following a TDD approach or strong testing culture. Experience building server-side applications using the MVC pattern or similar. React experience (building components, integrating APIs). Understanding distributed systems and resilient applications. Practical knowledge of REST API communication. Polish and English at B2+ minimum level. Familiarity with Agile methodologies (Scrum, Kanban). Experience as a tech team lead is a strong plus. Demonstrated ability to leverage AI tools to improve workflows or development efficiency is a plus. Why join us? Flexible Working Hours – We focus on results! Manage your time, keep your team informed about your availability, and attend key meetings. Work from Anywhere – Choose your ideal setup! Work 100% remotely within the EU , go hybrid , or enjoy our Warsaw office , fully equipped for productivity. Comprehensive Onboarding – From day one, we ensure you feel comfortable and supported, so you can quickly become part of the team. Flat Structure – We value initiative and open communication. Every voice matters here! Positive Company Culture & Team Spirit – We create an environment where everyone feels appreciated and comfortable. Modern Work Methods – We use cutting-edge project management techniques inspired by the IT world. Transparent Communication – Regular 360° feedback sessions and mentor support to help you grow. Top-Notch Equipment – Get a MacBook for your work. If you choose to work from our Warsaw office , you'll also have access to a 34” (16:9) widescreen monitor and an ergonomic standing desk . Weekly English Lessons – Optional classes with a native speaker to help you improve your skills.

🏢 Summary: B2B contract opportunity for an experienced Ruby on Rails Backend Developer to design, build, and maintain scalable backend services and production-grade APIs in a remote-first environment. The role focuses on delivering high-quality, reliable, and performant solutions in close collaboration with cross-functional teams. Candidates will work in an agile setup, contributing to architecture decisions, automated testing, and continuous improvement initiatives. 🗂️ Requirements: 4+ years of commercial experience with Ruby on Rails, Experience building and maintaining production-grade APIs and backend systems, Knowledge of PostgreSQL and relational database design, Experience with RSpec and automated testing, Experience with AWS and/or Heroku, Understanding of software architecture principles and backend scalability, Experience working in Agile environments, English proficiency at B2+ level 📃 Skills: Ruby, Rails, PostgreSQL, RSpec, AWS, Heroku, Sidekiq, SQL, REST, Git 🏢 Description: About us LLInformatics is a forward-thinking IT consulting firm, trusted by clients across Europe and North America. We specialize in delivering complex projects on time, with exceptional quality, and always meeting the highest compliance standards. Our remote-first team of 130+ experts is passionate about building cutting-edge digital products that drive real results. With a focus on data-driven decisions, measurable outcomes, and a strategic mindset, we’re raising the bar in our industry—backed by a strong, collaborative work culture that fuels our success. Contract Type: B2B Location: Remote or in our Warsaw office Your Tasks and Responsibilities: Design, develop, and maintain backend features and APIs using Ruby on Rails. Build scalable backend services supporting business applications. Collaborate with Product, QA, and DevOps teams to deliver business-focused solutions. Improve application performance, reliability, maintainability, and scalability. Write clean, production-ready code with appropriate test coverage (unit and integration tests). Participate in code reviews and follow engineering best practices. Troubleshoot application issues and support production deployments. Participate in agile development processes and contribute to continuous improvement initiatives. Requirements: 4+ years of commercial Ruby on Rails experience. Strong experience building and maintaining production-grade APIs and backend systems. Good knowledge of PostgreSQL and relational database design. Experience with RSpec and automated testing. Experience with AWS and/or Heroku. Understanding of software architecture principles and backend scalability concepts. Experience working in Agile environments. Strong communication skills in English (B2+). Nice to Have: Experience with background processing solutions (e.g., Sidekiq). Experience with monitoring, observability, and performance optimization. Experience working with international teams and stakeholders. Why join us? Flexible Working Hours – We focus on results! Manage your time, keep your team informed about your availability, and attend key meetings. Work from Anywhere – Choose your ideal setup! Work 100% remotely within the EU , go hybrid , or enjoy our Warsaw office , fully equipped for productivity. Comprehensive Onboarding – From day one, we ensure you feel comfortable and supported, so you can quickly become part of the team. Flat Structure – We value initiative and open communication. Every voice matters here! Positive Company Culture & Team Spirit – We create an environment where everyone feels appreciated and comfortable. Modern Work Methods – We use cutting-edge project management techniques inspired by the IT world. Transparent Communication – Regular 360° feedback sessions and mentor support to help you grow. Top-Notch Equipment – Get a MacBook for your work. If you choose to work from our Warsaw office , you'll also have access to a 34” (16:9) widescreen monitor and an ergonomic standing desk . Weekly English Lessons – Optional classes with a native speaker to help you improve your skills.

🏢 Summary: Senior Ruby on Rails engineer role focused on designing and building scalable, production-grade backend systems and APIs in a remote-first environment. The position involves architectural decision-making, performance optimization, mentoring, and close collaboration with cross-functional teams. The offer includes flexible remote work within the EU, modern equipment, and a strong engineering culture emphasizing quality and automation. 🗂️ Requirements: 6+ years commercial experience with Ruby on Rails, Strong experience building production-grade APIs and backend systems, Advanced knowledge of PostgreSQL, Experience with database optimization and data modeling, Strong experience with RSpec and automated testing, Experience with AWS and/or Heroku, Understanding of distributed systems and system architecture, Experience working in Agile environments, English proficiency at B2+ level 📃 Skills: Ruby, Rails, PostgreSQL, RSpec, AWS, Heroku, APIs, SQL, Git, Agile 🏢 Description: About us LLInformatics is a forward-thinking IT consulting firm, trusted by clients across Europe and North America. We specialize in delivering complex projects on time, with exceptional quality, and always meeting the highest compliance standards. Our remote-first team of 130+ experts is passionate about building cutting-edge digital products that drive real results. With a focus on data-driven decisions, measurable outcomes, and a strategic mindset, we’re raising the bar in our industry—backed by a strong, collaborative work culture that fuels our success. Contract Type: B2B Location: Remote or in our Warsaw office Your Tasks and Responsibilities: Design, develop, and own complex backend features and APIs using Ruby on Rails. Architect scalable, reliable, and maintainable backend services. Collaborate closely with Product, QA, DevOps, and business stakeholders to translate requirements into technical solutions. Drive improvements in system performance, scalability, reliability, and engineering quality. Write clean, production-grade code with strong automated test coverage. Review code, establish engineering standards, and contribute to architectural decisions. Troubleshoot complex production issues and support stable, efficient deployments. Participate in agile delivery processes and drive continuous improvement initiatives. Mentor other engineers and actively contribute to knowledge sharing within the team. Requirements: 6+ years of commercial Ruby on Rails experience. Strong experience designing and building production-grade APIs and backend systems. Advanced knowledge of PostgreSQL, database optimization, and data modeling. Strong experience with RSpec, automated testing, and engineering best practices. Experience with AWS and/or Heroku. Good understanding of distributed systems, scalability, and system architecture. Experience working in Agile environments. Strong communication skills in English (B2+). Nice to Have: Technical leadership or mentoring experience. Experience with observability, monitoring, and performance optimization. Experience participating in architectural discussions and technical decision-making. Experience working directly with international stakeholders. Why join us? Flexible Working Hours – We focus on results! Manage your time, keep your team informed about your availability, and attend key meetings. Work from Anywhere – Choose your ideal setup! Work 100% remotely within the EU , go hybrid , or enjoy our Warsaw office , fully equipped for productivity. Comprehensive Onboarding – From day one, we ensure you feel comfortable and supported, so you can quickly become part of the team. Flat Structure – We value initiative and open communication. Every voice matters here! Positive Company Culture & Team Spirit – We create an environment where everyone feels appreciated and comfortable. Modern Work Methods – We use cutting-edge project management techniques inspired by the IT world. Transparent Communication – Regular 360° feedback sessions and mentor support to help you grow. Top-Notch Equipment – Get a MacBook for your work. If you choose to work from our Warsaw office , you'll also have access to a 34” (16:9) widescreen monitor and an ergonomic standing desk . Weekly English Lessons – Optional classes with a native speaker to help you improve your skills.

🏢 Summary: B2B IT Project Manager role responsible for end-to-end delivery of multiple software projects, ensuring timelines, budgets, and quality standards are met. The position focuses on operational ownership, KPI-driven performance tracking, and client-facing coordination in Agile and hybrid environments. Fully remote or Warsaw-based with strong emphasis on process optimization and delivery excellence. 🗂️ Requirements: Minimum 4 years experience as IT Project Manager or similar delivery role, Experience managing multiple software projects simultaneously, Experience in software delivery environments, Knowledge of Agile, Lean, and traditional project management methodologies, Experience with budget and resource management, KPI-driven performance monitoring experience, Fluent English (C1 minimum) 📃 Skills: Agile, Lean, ProjectManagement, RiskManagement, Budgeting, ResourcePlanning, KPI, SoftwareDelivery 🏢 Description: About us LLInformatics is a forward-thinking IT consulting firm, trusted by clients across Europe and North America. We specialize in delivering complex projects on time, with exceptional quality, and always meeting the highest compliance standards. Our remote-first team of 130+ experts is passionate about building cutting-edge digital products that drive real results. With a focus on data-driven decisions, measurable outcomes, and a strategic mindset, we’re raising the bar in our industry—backed by a strong, collaborative work culture that fuels our success. Contract Type: B2B Location: Remote/Warsaw Your Tasks & Responsibilities Project Delivery & Operational Ownership Plan, execute, and deliver projects on time, within budget, and according to quality standards Define project scope, objectives, deliverables, timelines, and resource allocation Coordinate day-to-day project operations across teams Track project progress, priorities, blockers, and risks Proactively resolve issues and escalate concerns early Ensure accountability and operational efficiency across all project stakeholders Continuously optimize project workflows, tools, and methodologies Client Relationship Management Serve as the main operational point of contact for clients Build strong client trust through responsiveness and transparent communication Provide regular updates on project progress, risks, and milestones Ensure clients consistently feel supported and well-informed Identify opportunities for delivery improvements and enhanced client satisfaction Budget, Resource & Staffing Management Monitor budgets, project costs, and resource efficiency Optimize resource planning and task distribution across teams Define staffing and hiring needs for assigned projects/accounts Coordinate recruitment processes with technical interviewers Ensure strong alignment between client needs and team capabilities Quickly address underperformance or mismatches within project teams Team Operational Management Support team efficiency, collaboration, and overall project health Provide operational feedback to team members Help resolve team performance or collaboration challenges Foster alignment with company culture, values, and delivery expectations Performance Tracking & Continuous Improvement Monitor KPIs related to project delivery, client satisfaction, and operational effectiveness Prepare reports, analyses, and risk assessments Use data-driven insights to implement process improvements Contribute to refining internal project management standards and best practices Requirements Minimum 4 years of experience as an IT Project Manager or similar delivery role Strong ownership mentality and accountability Proven success managing multiple projects simultaneously Excellent organizational and planning capabilities Proactive communication and stakeholder management Strong problem-solving and decision-making skills Ability to work independently while managing multiple priorities Experience in software delivery environments Knowledge of Agile, Lean, and traditional project management methodologies Analytical mindset with KPI-driven decision-making Strong cultural alignment and team leadership capabilities Fluent English (minimum C1) Why Join LLInformatics? Flexible working hours focused on outcomes Work from anywhere in the EU, hybrid, or from our Warsaw office Comprehensive onboarding and mentor support Flat organizational structure with real influence on company processes High-trust, positive team culture Modern project management practices Transparent communication and regular feedback Premium equipment package (MacBook + office workstation setup) Optional weekly English lessons with native speakers Recruitment Process Stage 1: 30-minute video interview with the Recruitment Team Stage 2: 1-hour video interview with the Management Team

🏢 Summary: B2B role for an experienced QA Automation Engineer/SDET to design, develop, and scale Python-based UI and backend test automation frameworks for complex distributed systems. The position focuses on improving automation standards, reliability, and quality metrics while working with CI/CD pipelines and event-driven architectures. The role involves end-to-end ownership of test automation across multiple product areas in a remote or Warsaw-based setup. 🗂️ Requirements: Minimum 4+ years in Software Testing, QA Engineering or SDET roles, Strong experience in designing and developing test automation frameworks at scale, Advanced Python programming skills, Experience with API and backend testing in distributed systems, Hands-on experience with UI test automation tools, Strong SQL knowledge with ability to write complex queries, Experience with CI/CD pipelines and related tools, Practical knowledge of Linux environments and networking concepts, Experience with event-driven architectures or messaging systems, Strong debugging and log analysis skills, Ability to work independently and own automation across product areas, Experience contributing to or improving automation frameworks and standards 📃 Skills: Python, PyTest, Playwright, Selenium, SQL, Linux, Kafka, CircleCI, Git, Jira, TestRail, Sentry, CI/CD, API, Networking 🏢 Description: LLInformatics is an IT consulting company with dozens of satisfied clients across Europe and North America. We serve businesses that expect their challenging projects to be delivered according to plan, with impeccable quality, and under strict compliance requirements. Our remote-first team of 100+ experts specializes in building high-quality digital products. We set a new standard in our industry through data-driven decisions, measurable outcomes, a strategic mindset, and a solid work culture. Contract Type: B2B Location: Warsaw or the possibility of Remote work Your tasks and responsibilities: Design, develop, and maintain UI test automation frameworks for complex systems Work extensively with Python-based frameworks (e.g., PyTest, Playwright) and enhance existing automation libraries Apply strong Linux and networking knowledge in daily testing and debugging Write complex SQL queries for test data validation and automation support Deliver high-quality defect reports with logs, root cause analysis, and reproduction details Work with event-driven systems (e.g., Kafka in payments-related domains) Use and promote tools such as Jira, TestRail, Sentry, Git, and CircleCI within CI/CD workflows Independently deliver automation across multiple product areas Identify gaps in test coverage and proactively mitigate automation risks Continuously improve automation effectiveness and contribute to QA KPIs Drive reliability improvements in frameworks, tools, and test suites Communicate risks, blockers, and technical issues Take full ownership of quality for assigned areas Collaborate closely with engineers, architects, DevOps, and product teams Participate in cross-team discussions to improve system testability and design Share knowledge and best practices across engineering teams Oversee consistency and quality of Python-based automation frameworks Define and evolve automation standards and best practices Guide teams in selecting high-value test cases for automation Track and report key automation and quality metrics Support onboarding of new engineers and ensure smooth ramp-up Requirements: Minimum 4+ years of experience in Software Testing, QA Engineering, or SDET roles Strong hands-on experience in test automation design and development at scale Advanced Python programming skills with ability to build and maintain robust automation frameworks Experience with API and backend testing in complex distributed systems Practical knowledge of UI test automation tools (e.g., Playwright, Selenium or similar) Strong understanding of SQL, including writing complex queries for test data validation and automation purposes Experience working with CI/CD pipelines and related tools (e.g., CircleCI or similar) Familiarity with Linux environments and networking concepts used in day-to-day testing work Experience with event-driven architectures or messaging systems (Kafka experience is a strong plus) Solid understanding of debugging, log analysis, and root cause investigation in production-like environments Ability to read, interpret, and work with technical and functional documentation in English Strong ownership mindset with ability to work independently across multiple product areas Proven ability to improve or contribute to automation frameworks and testing standards Experience mentoring or supporting junior engineers is highly valued Strong collaboration skills and experience working closely with developers, DevOps, and product teams Why join us? Comprehensive Onboarding – From day one, we ensure you feel comfortable and supported, so you can quickly become part of the team. Flat Structure – We value initiative and open communication. Every voice matters here! Positive Company Culture & Team Spirit – We create an environment where everyone feels appreciated and comfortable. Modern Work Methods – We use cutting-edge project management techniques inspired by the IT world. Transparent Communication – Regular 360° feedback sessions and mentor support to help you grow. Top-Notch Equipment – Get a MacBook for your work. If you choose to work from our Warsaw office, you'll also have access to a 34” (16:9) widescreen monitor and an ergonomic standing desk. Weekly English Lessons – Optional classes with a native speaker to help you improve your skills.

🏢 Summary: A junior developer academy program offering hands-on experience with Ruby on Rails under mentorship, leading to potential full-time collaboration. Participants will build features, fix bugs, and write tests while deepening their understanding of web application development. The program starts on-site in Warsaw with the possibility of remote work later. 🗂️ Requirements: Basic knowledge of Ruby on Rails, Basic knowledge of JavaScript, Understanding of web application architecture, Ability to write unit, integration, and end-to-end tests, Upper-Intermediate English (B2+) 📃 Skills: Ruby, Rails, JavaScript, UnitTesting, IntegrationTesting, E2ETesting 🏢 Description: 🚀 LLI Academy 3rd Edition: Now Recruiting! We’re excited to launch the third edition of our LLI Academy – an initiative dedicated to discovering talented junior developers who are passionate about the IT world, coding, and eager to grow their skills in a professional environment. This program is designed to give promising developers the opportunity to gain hands-on experience, receive mentorship, and become a part of our dynamic team. Our previous editions were a great success, resulting in continued cooperation with amazing junior developers who joined our company full-time. Now, we’re looking for the next wave of talent to join us! About us LLInformatics is a forward-thinking IT consulting firm, trusted by clients across Europe and North America. We specialize in delivering complex projects on time, with exceptional quality, and always meeting the highest compliance standards. Our remote-first team of 100+ experts is passionate about building cutting-edge digital products that drive real results. With a focus on data-driven decisions, measurable outcomes, and a strategic mindset, we’re raising the bar in our industry, backed by a strong, collaborative work culture that fuels our success. 📍 Location: Warsaw (on-site for first 3 months), then possibility of remote work📄 Contract Type: UZ Your tasks and responsibilities: Develop your coding skills with the support of mentors and a structured curriculum Implement new features and functionalities Solve programming challenges while deepening your understanding of Ruby Participate in regular code reviews and receive feedback from experienced developers Maintain and improve existing codebases (bug fixing, refactoring) Write unit, integration, and end-to-end tests Requirements: Basic knowledge of Ruby on Rails Basic knowledge of JavaScript Eagerness to learn, improve, and tackle new challenges Logical and critical thinking skills Understanding of how web applications work A proactive, hands-on attitude towards solving problems Upper-Intermediate English ( B2+ ) Why join us? Flexible Working Hours – We focus on results! Manage your time, keep your team informed about your availability, and attend key meetings. Comprehensive Onboarding – From day one, we ensure you feel comfortable and supported, so you can quickly become part of the team. Flat Structure – We value initiative and open communication. Every voice matters here! Positive Company Culture & Team Spirit – We create an environment where everyone feels appreciated and comfortable. Modern Work Methods – We use cutting-edge project management techniques inspired by the IT world. Transparent Communication – Regular 360° feedback sessions and mentor support to help you grow. Top-Notch Equipment – Get a MacBook for your work. If you choose to work from our Warsaw office, you'll also have access to a 34” (16:9) widescreen monitor and an ergonomic standing desk. Weekly English Lessons – Optional classes with a native speaker to help you improve your skills.

🏢 Summary: Remote Full-stack Developer role focused on strengthening frontend capabilities using React, Next.js, and TypeScript while contributing to end-to-end product development. The position involves building and maintaining full-stack features, improving frontend architecture, and collaborating closely with product and business teams. The offer includes flexible remote work, modern development practices, and a small collaborative team environment. 🗂️ Requirements: 2+ years of professional software development experience, Experience with at least one major backend framework, Understanding of relational databases, Knowledge of React, Knowledge of TypeScript, Knowledge of frontend component architecture, Knowledge of advanced state management, Experience with SSR/ISR frameworks, Fluency in modern JavaScript tooling, Clean code practices, English communication skills, Ability to independently deliver end-to-end solutions 📃 Skills: React, Next.js, TypeScript, GraphQL, Tailwind, Ruby, Rails, Postgres, Kubernetes, CI/CD, JavaScript, SQL, Apollo, urql, GitHub, Metabase, ClickUp, Slack 🏢 Description: At SonarHome we help people make and execute the right decisions when selling or buying a property. We provide technology to find the best price and build an optimal home sales strategy. SonarHome is a small remote-first team of less than 25 individuals, including the development team. We are looking for a Full-stack Developer who will primarily strengthen frontend capabilities. Our frontend stack is based on React, Next.js, TypeScript, GraphQL and Tailwind CSS. The backend is developed in Ruby on Rails with a Postgres database. We use Kubernetes and CI/CD for deployment and maintain high code quality through code reviews, formatters, linters and Dependabot. Daily tools include ClickUp, Slack, GitHub and Metabase. What makes you a good fit? - Full-stack attitude and ability to independently deliver end-to-end solutions - 2+ years of professional software development experience or equivalent hands-on experience building and maintaining production software - Experience with at least one major backend framework - Understanding of relational databases - Knowledge of modern React and frontend patterns - Knowledge of TypeScript, component architecture and advanced state management - Strong grasp of SSR/ISR frameworks such as Next.js - Ability to effectively use AI for code generation and refactoring while reviewing and improving outputs - Fluency in modern JavaScript tooling - Clean code approach and attention to detail - Comfortable communicating in English Nice to haves: - Ruby on Rails experience - Strong SQL skills - GraphQL experience including schema design, Apollo/urql and caching - Comfortable communicating in Polish What will you be responsible for? - Developing and maintaining frontend applications, both internal and user-facing - Building new full-stack features - Reviewing code written by team members - Conducting experiments, refactoring, upgrading and maintaining applications - Working closely with the Product Team and CEO to solve business problems - Fixing bugs and improving the product for customers and partners - Shaping frontend culture by identifying refactors, performance bottlenecks and improving existing solutions What do we offer? - Work in a small development team with real impact on the product - Fully remote work - Flexible working hours - No overtime and no unrealistic deadlines - B2B contract preferred for EU countries - Work on your own device - Salary range: 10-16k PLN/month

🏢 Summary: Fullstack Engineer role focused on building and scaling a global data-driven insights platform using modern JavaScript technologies. The position involves developing backend and frontend services, designing scalable databases, and influencing system architecture. You will work on high-load systems, ensure code quality, and contribute to technical decisions and mentoring. 🗂️ Requirements: 5+ years of experience with JavaScript and Node.js, 3+ years of experience with TypeScript and React or Next.js, Hands-on experience with scalable backend systems, Experience designing SQL and NoSQL database schemas, Ability to optimize queries for high-load systems, Knowledge of web fundamentals and networking concepts, Understanding of OWASP security best practices, Experience with AWS cloud services, Experience writing unit, integration, and e2e tests, Professional proficiency in English 📃 Skills: JavaScript, Node.js, TypeScript, React, Next.js, REST, GraphQL, SQL, NoSQL, AWS, CORS, OWASP, Microservices, Serverless 🏢 Description: We’re building a data-driven insights platform used by professionals worldwide. Our mission is to turn complex data into actionable insights and empower teams to make better decisions. We value ownership, technical excellence, and collaboration . If you enjoy building scalable systems, mentoring engineers, and shaping software architecture, you’ll fit right in. 🎯 Your mission Develop and maintain backend and frontend services (REST/GraphQL APIs, React apps) Design scalable database schemas (SQL & NoSQL) and optimize queries for high-load systems Collaborate with product, design, and DevOps teams to deliver robust solutions Write clean, tested code (unit, integration, e2e) Influence architecture and technical decisions Mentor other developers and share best practices 📌 You should have 5+ years in JavaScript / Node.js 3+ years in TypeScript + React/Next.js Hands-on experience with scalable backend systems Knowledge of web fundamentals & networking (CORS, browser behavior) Understanding of security best practices (OWASP) Experience with cloud services (AWS preferred) Strong communication skills in English Ability to work independently and take ownership ✨ Nice to have Experience with microservices / serverless architectures Data pipelines, scraping, or data-heavy applications Team leadership or mentoring experience Exposure to AI/ML integrations 💡 Why join us High-impact role on a global data platform Work with modern technologies and best engineering practices Autonomy & ownership in your work Collaborative and experienced team Competitive employment package and benefits.