Node.js Tech Lead (Integration)

🏢 Summary: B2B full-stack role for a Nordic SaaS project focused on designing and implementing scalable, cloud-based microservices and high-availability applications. The position emphasizes strong backend development in Java/Spring with modern frontend frameworks, test-driven practices, and cloud integrations. Work involves building robust, maintainable systems optimized for scalability and operational efficiency in a remote environment within Poland. 🗂️ Requirements: Minimum 5 years commercial experience as Full-Stack Developer, Strong experience with Java, Strong experience with Spring and Spring Boot, Experience with Angular or Vue.js, Experience in microservices architecture, Experience building REST APIs, Experience with relational databases and SQL, Knowledge of Linux and server operations, Experience with virtualization, Experience with automated testing frameworks, Understanding of cloud environments and serverless functions, Experience with autoscaling and high-availability systems 📃 Skills: Java, Spring, SpringBoot, Angular, Vue, JavaScript, TypeScript, REST, SQL, Microservices, Linux, Virtualization, Selenium, Wiremock, AWS, Lambda, CI/CD, Jenkins 🏢 Description: Contract: B2B Salary: 110–140 PLN/h net/B2B Location: Remote within Poland Start: ASAP Key Technologies Java (Spring, Spring Boot) JavaScript / TypeScript, Angular, Vue.js JSON/REST, Relational Databases (SQL) Microservices architecture, Autoscaling, High Availability Linux, Server Operations & Virtualization Automated Testing (Selenium, Wiremock) AWS Lambda or similar cloud functions Project Overview Join the team as a Full-Stack Developer supporting a Nordic SaaS customer. The project involves designing and implementing scalable, cloud-based microservices , delivering high-quality, adaptive software solutions. You will collaborate in cross-functional teams to improve architecture, develop automated and test-driven systems, and contribute to real-time, high-availability applications. The focus is on building robust backend services while integrating modern frontend frameworks, optimizing for scalability, maintainability, and operational efficiency . Responsibilities Design, develop, and maintain full-stack applications with emphasis on microservices architecture Apply test-driven development practices in an agile environment Collaborate in cross-functional teams to continuously improve systems and workflows Contribute to architecture decisions ensuring scalability, adaptability, and high availability Integrate cloud-based services (AWS Lambda or similar) Develop automated tests and CI/CD pipelines Leverage AI/automation tools where applicable to improve development efficiency Mentor junior developers and share knowledge of best practices Requirements Min. 4 years of commercial experience as a Full-Stack Developer (mid-to-senior level) Strong hands-on experience with Java, Spring / Spring Boot , and frontend frameworks Angular, Vue.js Experience in microservices, REST APIs, relational databases, SQL Solid knowledge of Linux, server operation, and virtualization Experience with automated testing frameworks like Selenium and Wiremock Understanding of cloud environments , serverless functions, and autoscaling Good communication skills in English (B2+/C1) Ability to work independently in an evolving product environment Nice to have Experience with Elixir, Scala, Python, or Asterisk Knowledge of WebRTC or SIP protocols Familiarity with CI/CD tools (Jenkins), project tools (Confluence, Jira) Exposure to AI-assisted development or custom AI integrations Experience with cloud-native architectures and large-scale SaaS systems Why join us? Rite NRG is a vibrant outsourcing technology company driven by the Right People . We are dedicated to empowering businesses through innovative software solutions. We focus on building strong partnerships and providing top-notch software solutions that drive real business growth. Our business model revolves around collaboration and delivering impactful results for our clients. Join us, and be part of a team where great minds, Right Energy , and strong partnerships come together to shape the future of technology! Stable, long-term, full-time collaboration. Remote work within Poland and flexible working hours. High engineering culture with a focus on growth and learning. Multinational teams. Benefits: Private medical care, Multisport card, and workation (work for a week from Barcelona or elsewhere).

🏢 Summary: B2B contract for a Senior Software Engineer to design and build backend services and full-stack features for an AI platform, working primarily with TypeScript. The role focuses on developing REST/GraphQL APIs, optimizing PostgreSQL databases, and containerizing services with Docker in a remote-first environment within Poland. 🗂️ Requirements: Minimum 5 years of experience in JavaScript and TypeScript, Experience designing and building RESTful or GraphQL APIs, Hands-on experience with Next.js and/or NestJS, Experience with TypeScript ORM, preferably Drizzle, Strong PostgreSQL skills including schema design and query optimization, Experience with Docker for development and deployment, Ability to use AI tools in daily engineering work, Fluency in Polish, Advanced English level (B2/C1) 📃 Skills: JavaScript, TypeScript, REST, GraphQL, Next.js, NestJS, Drizzle, PostgreSQL, Docker, AI, ORM 🏢 Description: Contract: B2B Rate: 140 - 150 PLN/h net+VAT Location: Remote within Poland Start: ASAP Key Technologies: JavaScript, TypeScript Backend APIs: REST, GraphQL Frameworks: Next.js, NestJS ORM: Drizzle (or similar modern TypeScript ORM) Database: PostgreSQL Containerization: Docker AI tooling: AI-assisted development, agentic coding workflows Nice to have: Kubernetes, BullMQ, Puppeteer, web scraping, AI integrations: Model Context Protocol (MCP) and agent-to-system interfaces Project Overview We’re looking for a Senior Software Engineer who is comfortable working on both backend and full-stack tasks when needed. As an early member of the team, you will help design and build the systems behind our AI platform. You will work mainly in TypeScript, build APIs and services, and contribute to full-stack features in Next.js. Responsibilities: Design and build backend services and APIs (REST and/or GraphQL). Develop full-stack features in Next.js when needed. Design database schemas and optimize queries in PostgreSQL. Work with a TypeScript ORM, preferably Drizzle. Containerize services for development and deployment using Docker. Troubleshoot issues, improve performance, and maintain reliability. Review code, share best practices, and support team development. Write and maintain clear technical documentation Requirements: Min. 5 years of experience in JavaScript and TypeScript. Experience designing and building RESTful or GraphQL APIs. Hands-on experience with Next.js and/or NestJS . Experience with ORMs in TypeScript, ideally Drizzle. Strong PostgreSQL skills, including schema design and query optimization. Docker experience for local development and deployments. Interest in using AI tools in day-to-day engineering work and improving development workflows. Fluency in Polish and an advanced level of English (B2/C1) Nice to have: Kubernetes experience. BullMQ or similar background job and queue systems. Puppeteer or web scraping and browser automation. Knowledge of Model Context Protocol (MCP) or how AI agents integrate with systems. Why join us? Rite NRG is a vibrant outsourcing technology company driven by the Right People . We are dedicated to empowering businesses through innovative software solutions. We focus on building strong partnerships and providing top-notch software solutions that drive real business growth. Our business model revolves around collaboration and delivering impactful results for our clients. Join us, and be part of a team where great minds, Right Energy , and strong partnerships come together to shape the future of technology! Stable, long-term, full-time collaboration. Remote work within Poland and flexible working hours. High engineering culture with a focus on growth and learning. Multinational teams. Benefits: Private medical care, Multisport card, and workation (work for a week from Barcelona or elsewhere).

🏢 Summary: B2B contract for a Java Developer to build and maintain secure, scalable backend services and workflow-driven processes for a leading bank. The role focuses on Java/Spring development, BPM engine implementation (Flowable or similar), REST integrations, and event-driven microservices in a banking environment. You will work on enterprise-grade systems supporting core banking products and internal operations. 🗂️ Requirements: 4+ years of commercial experience in Java backend development, Commercial experience with Flowable or other BPM engine (Camunda, Activiti, jBPM) in production, Experience with Spring (Boot, MVC, Data) and Hibernate, Strong knowledge of REST APIs and microservices architecture, Strong knowledge of SQL and relational databases (MS SQL or Oracle), Experience with message brokers or streaming platforms (Kafka or similar), Experience with Maven and Git, Fluency in Polish, Advanced English (B2/C1) 📃 Skills: Java, Spring, SpringBoot, SpringMVC, SpringData, SpringSecurity, Hibernate, Flowable, Camunda, Activiti, jBPM, BPMN, DMN, REST, Microservices, SQL, MSSQL, Oracle, Kafka, PubSub, Maven, Git, JUnit, Mockito 🏢 Description: Contract: B2B Rate: Mid: 110–130 PLN/h net + VAT, Senior: 120–140 PLN/h net + VAT Location: Remote within Poland Project: Development and maintenance of backend services and workflow-driven processes for a leading bank Project Overview Join our team as a Java Developer and work on a project for one of the leading banks. You will develop and maintain backend services, integrations, and business processes orchestrated in Flowable , supporting key banking products and internal operations. The project focuses on building secure, reliable, and scalable solutions used daily by thousands of customers and bank employees. You’ll collaborate closely with product and technical stakeholders, contribute to architecture discussions, and help continuously improve engineering standards and delivery practices. Key Technologies Backend: Java (Core Java), Spring (Spring Boot, Spring MVC, Spring Data, Spring Security), Hibernate Workflow: Flowable or Camunda/Activiti/jBPM (BPMN/DMN, process automation, integrations) APIs: REST API design & integration Databases: MS SQL, Oracle Messaging: Kafka / Pub/Sub (or similar) Tools: Maven, Git, JUnit, Mockito Responsibilities Design, develop, and maintain backend services in Java using Spring and Hibernate. Build and maintain workflow-driven solutions using Flowable (BPMN/DMN), including process modeling and implementation. Implement and integrate RESTful APIs with internal and external banking systems. Work in a microservices environment and support event-driven integrations (Kafka / Pub/Sub). Work with relational databases (MS SQL / Oracle): schema design, efficient queries, performance tuning. Write clean, testable, and well-documented code; create unit/integration tests (JUnit, Mockito). Troubleshoot production issues, debug incidents, and contribute to performance optimization. Collaborate with developers, QA, architects, analysts, and business stakeholders to refine requirements and propose technical solutions. Requirements 4+ years of commercial experience in Java development (enterprise/backend systems). Mandatory: Proven commercial experience with Flowable or another BPM/workflow engine (e.g., Camunda, Activiti, jBPM) used in production environments. Experience with Spring (Boot, MVC, Data; Security is a plus) and Hibernate. Solid understanding of REST APIs and microservices architecture. Strong knowledge of SQL and relational databases (MS SQL Server or Oracle). Hands-on experience with message queues/streaming platforms (Kafka, Pub/Sub, or similar). Practical experience with Maven and Git in daily development work. Fluency in Polish and an advanced level of English (B2/C1). Nice to have Banking/financial sector experience Familiarity with OAuth2 / OpenID Connect, security standards, and auditing Observability tools (logs/metrics/tracing), performance profiling Why join us? Rite NRG is a vibrant outsourcing technology company driven by the Right People . We are dedicated to empowering businesses through innovative software solutions. We focus on building strong partnerships and providing top-notch software solutions that drive real business growth. Our business model revolves around collaboration and delivering impactful results for our clients. Join us, and be part of a team where great minds, Right Energy , and strong partnerships come together to shape the future of technology! Stable, long-term, full-time collaboration. Remote work within Poland and flexible working hours. High engineering culture with a focus on growth and learning. Multinational teams. Benefits: Private medical care, Multisport card, and workation (work for a week from Barcelona or elsewhere).

🏢 Summary: B2B contract for an experienced .NET Developer to enhance a core backend platform in the roadside assistance and insurance domain, focusing on improving a data-driven parts-picking algorithm. The role involves building and optimizing backend services, integrating multiple data sources, and designing scalable REST APIs in Azure. It is a problem-solving oriented project requiring strong ownership and backend architecture skills. 🗂️ Requirements: Minimum 5+ years commercial experience as Backend/.NET Developer, Strong experience with C# and modern .NET, Hands-on experience with Azure services, Strong experience with SQL and relational databases, Experience building and maintaining REST APIs, Ability to design scalable and maintainable backend architectures, Experience integrating multiple data sources (APIs, databases, external systems), Fluent Polish and advanced English (B2/C1) 📃 Skills: C#, .NET, Azure, SQL, REST, API, Snowflake, Microsoft, Dynamics 🏢 Description: Contract : B2B Salary : 110 - 130 PLN/h net/B2B Location : Remote within Poland Start : ASAP (first week of April at the latest) Key Technologies C# / .NET Azure SQL REST API Nice to have: Snowflake, Microsoft Dynamics Project Overview Join the team as a .NET Developer and work on a core platform for a leading UK provider of roadside assistance and insurance. The SMR domain (Service, Maintenance & Replace) supports mechanics and service operations by ensuring the right parts are selected for jobs booked - quickly and accurately. Your main focus will be to enhance the parts-picking algorithm to improve prediction quality and operational efficiency. This is a true problem-solving project: you’ll work with multiple disjointed datasets, identify patterns and gaps, and design backend solutions that can be reused across other areas of the business. Responsibilities Design, develop, and maintain backend services using C#/.NET Build and evolve data-driven logic to improve parts prediction and selection accuracy Integrate and unify data from multiple sources (API/DB/external systems) Write efficient, maintainable SQL and support data-quality initiatives Develop and maintain REST APIs used by other services and operational tools Contribute to architecture decisions with a focus on reusability, scalability, and maintainability Participate in code reviews, technical workshops, and sprint ceremonies Improve engineering practices (testing strategy, CI/CD, observability, performance) Requirements Min. 5+ years of commercial experience as a Backend / .NET Developer Strong command of C# and modern .NET (building production-grade services) Hands-on experience with Azure (e.g., Repos, Pipelines, Key Vault, App Insights or equivalent) Strong experience with SQL and relational databases (query optimization, data modeling) Solid understanding of backend best practices (Clean Code, SOLID, design patterns, API design) Proven ability to work with ambiguous problem spaces - creative, puzzle-solving mindset Comfortably designing solutions that are not fully specified and require independent ownership Fluent in Polish and advanced English (B2/C1) Nice to have : Experience with Snowflake and/or Microsoft Dynamics integrations Experience in data-heavy domains, prediction/selection logic, or operational tooling Strong observability mindset (logs, metrics, traces) Why join us? Rite NRG is a vibrant outsourcing technology company driven by the Right People , dedicated to empowering businesses through innovative software solutions. We focus on building strong partnerships and providing top-notch software solutions that drive real business growth. Our business model revolves around collaboration and delivering impactful results for our clients. Join us, and be part of a team where great minds, Right Energy , and strong partnerships come together to shape the future of technology! Stable, long-term, full-time collaboration Remote work within Poland and flexible working hours High engineering culture with a focus on growth and learning Multinational teams Benefits: Private medical care, Multisport card, and workation (work for a week from Barcelona or elsewhere)

🏢 Summary: Tech Lead role in a greenfield fintech platform within the banking domain, responsible for shaping architecture and leading a cross-functional team. The position combines hands-on Java development with architectural decision-making in a microservices, event-driven environment. You will drive backend technical direction while collaborating closely on frontend integrations. 🗂️ Requirements: 7+ years commercial software development experience, Proven experience in Tech Lead role, Strong hands-on experience with Java, Strong knowledge of Spring ecosystem (Spring Boot, Spring MVC, Spring Cloud), Experience with microservices architecture, Experience with event-driven architectures, Practical experience with PostgreSQL or other relational databases, Understanding of frontend architectures (React and/or Flutter), Very good knowledge of fullstack application architecture, Experience with distributed systems, Fluent English 📃 Skills: Java, Spring, SpringBoot, SpringMVC, SpringCloud, PostgreSQL, Microservices, EventDriven, React, Flutter, SQL, DistributedSystems 🏢 Description: Salary: 1300 - 1600 PLN/MD on B2B Remote: hybrid from Gdynia / Gdańsk / Warszawa / Rzeszów / Kraków (2 days per week from the office) Why choose this offer? Opportunity to build a fintech platform from scratch (greenfield project) Real impact on architecture and core frontend services from day one Collaboration within a cross-functional, international team Work on a large-scale financial platform in the banking domain Project We are building a new fintech platform from the ground up for a financial institution operating in the banking products space . As a Tech Lead , you will own the technical direction of a cross-functional squad (developers, QA Engineer, Business Analyst) and ensure high-quality delivery across both backend and frontend layers . This is a hands-on leadership role - you will split your time between coding, architectural decision-making, and mentoring the team. The project is fully greenfield, giving you the opportunity to shape architecture, development standards, and engineering culture from day one. Each Tech Lead works closely with a Delivery Manager (shared across several teams). Responsibilities you'll have: Lead a cross-functional team through the full delivery lifecycle Own the squad’s technical direction, primarily on the backend , with awareness of frontend implications Design and evolve system architecture in a microservices and event-driven environment Ensure high code quality through reviews, standards, and best practices Collaborate with the Delivery Manager and Business Analyst to translate business needs into technical solutions Align with other Tech Leads to ensure architectural consistency across teams Identify, communicate, and mitigate technical risks and dependencies Contribute hands-on to development on a regular basis Communicate technical decisions and trade-offs clearly in English Expected competences and knowledge Minimum 7+ years of commercial experience in software development Proven experience in a Tech Lead role Strong hands-on expertise in Java and the Spring ecosystem (Spring Boot, Spring MVC, Spring Cloud) Understanding of frontend and client-side architectures , with exposure to React and/or Flutter (ability to collaborate efficiently with frontend/mobile developers, review high-level solutions, understand integration points and trade-offs) Very good understanding of fullstack application architecture Experience with event-driven architectures (message brokers, asynchronous communication, events) Practical knowledge of PostgreSQL or similar relational databases Experience working with microservices and distributed systems Strong mentoring and technical leadership skills Fluent English (spoken and written) Nice to have: Hands-on or architectural experience with React and/or Flutter Experience with Kafka or similar messaging/streaming platforms Familiarity with Google Cloud Platform (GCP) Experience with Kubernetes and containerized deployments Background in fintech or banking projects Experience building and scaling greenfield systems Technologies you'll work with Java Spring (Boot, MVC, Cloud) PostgreSQL Microservices Event-driven architecture Nice to have: React Flutter Kafka GCP Kubernetes Client – why choose this particular client from the Jit portfolio? The client is a fintech institution operating in the Kingdom of Saudi Arabia, focused on modernising its digital capabilities and expanding its offering for micro-SME customers . It is an organisation with a strong market presence and a clear strategic commitment to innovation, aiming to deliver banking experiences that are fully digital, user-friendly, and deeply integrated with day-to-day business needs. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy. Wymagania Oczekujemy Oferujemy

🏢 Summary: 100% remote B2B opportunity to lead a development team in building and maintaining scalable applications within an agile environment. The role combines hands-on full-stack development with strategic technical leadership, focusing on robust system architecture and faster delivery of new solutions. Long-term cooperation with a two-stage recruitment process including a technical test. 🗂️ Requirements: Proficiency in .NET, Proficiency in C#, Experience in full-stack development, Experience with front-end technologies, Experience with document-based databases, Knowledge of event-based messaging frameworks, Experience with cloud services, Experience with containerization, Ability to lead development teams, Experience working in agile environment 📃 Skills: .NET, C#, Angular, MongoDB, Cloud, Docker, Microservices, REST, Git 🏢 Description: Work model: 100% remote Start date: Flexible Rate: up to 215 PLN/h netto + VAT Contract : B2B, long-term cooperation (12-month contract up front + extensions) Recruitment process : 2 stages, including a technical test estimated to take 2-4 hours. Summary: The role focuses on leading the development team to create new solutions and maintain systems within an agile environment, emphasizing the importance of robust applications and strategic direction. Main Responsibilities: Lead the development team in creating and maintaining applications. Adopt wider technology practices and address the speed of new application delivery. Engage in hands-on development while guiding the strategic direction of projects. Collaborate with teams to gather specifications and perform technical analysis. Navigate complex systems and ensure they are built to scale. Manage developer quality and capacity amidst organizational constraints. Key Requirements: Proficient in .NET and C#. Experience with full-stack development, including front-end technologies. Familiarity with document-based databases. Knowledge of event-based messaging frameworks. Experience with cloud services and containerization. Nice to Have: Prior experience in the banking or financial services sector. Familiarity with Angular or other modern front-end frameworks. Experience with MongoDB or similar environments. Other Details: Environment: .NET, C#, Angular, MongoDB, moving towards cloud solutions. Team Structure: Full Stack Developers working closely with Business Analysts.

🏢 Summary: Long-term remote B2B contract for a technical leader responsible for guiding a development team in building and maintaining scalable applications within an agile environment. The role combines hands-on .NET development with strategic oversight, technical analysis, and quality management. Focus is on delivering robust, cloud-oriented solutions and improving application delivery speed. 🗂️ Requirements: Proficiency in .NET and C#, Experience in full-stack development, Experience with front-end technologies, Experience with document-based databases, Knowledge of event-based messaging frameworks, Experience with cloud services, Experience with containerization, Ability to lead development team, Experience in building scalable systems 📃 Skills: .NET, C#, Angular, MongoDB, Cloud, Docker, Messaging, SQL 🏢 Description: Work model: 100% remote Start date: 30.06.2026 Rate: 160-180 PLN/h netto + VAT Contract : B2B, long-term cooperation (12-month contract up front + extensions) Recruitment process : 2 stages, including a technical test estimated to take 2-4 hours. Summary: The role focuses on leading the development team to create new solutions and maintain systems within an agile environment, emphasizing the importance of robust applications and strategic direction. Main Responsibilities: Lead the development team in creating and maintaining applications. Adopt wider technology practices and address the speed of new application delivery. Engage in hands-on development while guiding the strategic direction of projects. Collaborate with teams to gather specifications and perform technical analysis. Navigate complex systems and ensure they are built to scale. Manage developer quality and capacity amidst organizational constraints. Key Requirements: Proficient in .NET and C#. Experience with full-stack development, including front-end technologies. Familiarity with document-based databases. Knowledge of event-based messaging frameworks. Experience with cloud services and containerization. Nice to Have: Prior experience in the banking or financial services sector. Familiarity with Angular or other modern front-end frameworks. Experience with MongoDB or similar environments. Other Details: Environment: .NET, C#, Angular, MongoDB, moving towards cloud solutions. Team Structure: Full Stack Developers working closely with Business Analysts.

🏢 Summary: Technical leadership role focused on driving the development and maintenance of scalable .NET-based applications in an agile environment. The position combines hands-on full-stack development with strategic oversight of architecture, quality, and delivery speed. It involves close collaboration with cross-functional teams to build robust, cloud-oriented solutions. 🗂️ Requirements: Proficiency in .NET and C#, Experience in full-stack development, Knowledge of front-end technologies, Experience with document-based databases, Knowledge of event-based messaging frameworks, Experience with cloud services, Experience with containerization, Ability to design scalable systems, Experience leading development teams 📃 Skills: .NET, C#, Angular, MongoDB, Cloud, Docker, Kubernetes, Microservices, REST, Git 🏢 Description: Work model: 100% remote Start date: 30.06.2026 Rate: 160-180 PLN/h netto + VAT Contract : B2B, long-term cooperation (12-month contract up front + extensions) Recruitment process : 2 stages, including a technical test estimated to take 2-4 hours. Summary: The role focuses on leading the development team to create new solutions and maintain systems within an agile environment, emphasizing the importance of robust applications and strategic direction. Main Responsibilities: Lead the development team in creating and maintaining applications. Adopt wider technology practices and address the speed of new application delivery. Engage in hands-on development while guiding the strategic direction of projects. Collaborate with teams to gather specifications and perform technical analysis. Navigate complex systems and ensure they are built to scale. Manage developer quality and capacity amidst organizational constraints. Key Requirements: Proficient in .NET and C#. Experience with full-stack development, including front-end technologies. Familiarity with document-based databases. Knowledge of event-based messaging frameworks. Experience with cloud services and containerization. Nice to Have: Prior experience in the banking or financial services sector. Familiarity with Angular or other modern front-end frameworks. Experience with MongoDB or similar environments. Other Details: Environment: .NET, C#, Angular, MongoDB, moving towards cloud solutions. Team Structure: Full Stack Developers working closely with Business Analysts.

🏢 Summary: Frontend Tech Lead role focused on driving technical strategy and hands-on development of React-based web applications, with strong ownership of frontend architecture and AI-driven interfaces. The position combines leadership, product thinking, and close collaboration with design and product teams to deliver scalable, user-friendly solutions. You will shape frontend standards, mentor engineers, and lead integration of intelligent features into modern web platforms. 🗂️ Requirements: Strong hands-on experience with React, Expertise in JavaScript and TypeScript, Experience leading frontend architecture in production environments, Experience with state management solutions, Knowledge of responsive design and accessibility, Experience with frontend performance optimization, Familiarity with backend technologies and APIs, Experience with Git and collaborative workflows, Experience or strong interest in AI frameworks and AI-powered features, English proficiency at C1 level or higher 📃 Skills: React, JavaScript, TypeScript, Redux, ReactQuery, Zustand, ReactNative, Git, Java, AI 🏢 Description: Salary: 1200 - 1600 pln/md B2B Location: Warszawa/ Gdynia/ Kraków (elastic hybrid) Why choose this offer? Work with a top-tier international product company driving digital transformation in the infrastructure space Real ownership of the product, not just ticket delivery Scandinavian culture : autonomy, transparency, flexibility Direct influence on business direction and user-facing functionality Strategic, client-facing role: your voice matters Project As a Frontend Tech Lead , you'll drive the innovation and evolution of our frontend platform, working primarily with React and our web-based applications. You’ll play a key role in defining frontend technical strategy and architecture , while remaining hands-on with code. You'll work closely with the design and product teams to ensure complex construction workflows are intuitive and engaging for our users. This role combines strong frontend engineering expertise with technical leadership and product thinking . As the client expands their AI capabilities, you'll lead the frontend efforts in creating intelligent, user-friendly interfaces that make AI features accessible to construction professionals, while guiding the team toward scalable and maintainable solutions. What you'll be doing Drive frontend innovation and evolution of our React-based applications, setting technical direction for our user interfaces Champion user experience by creating intuitive, responsive interfaces that make complex construction workflows simple Act as a frontend technical leader , supporting and guiding engineers through code reviews, architectural discussions, and best practices Lead AI interface integration by designing and implementing user-friendly AI features and interactions Collaborate with design and product teams to translate user needs into exceptional frontend experiences Take ownership of frontend architecture decisions and ensure code quality and performance Navigate our technology landscape with focus on React , modern JavaScript , and frontend tooling Mentor and support Frontend Engineers in modern development techniques, frontend architecture, and AI-assisted programming Participate in technical planning and architectural decisions affecting the frontend platform Shape our frontend future by evaluating new technologies and proposing improvements to our development processes Expected competences and knowledge Problem-solving mindset : You enjoy tackling complex technical and architectural challenges Ownership mentality : You take responsibility not only for your work, but also for the overall frontend quality High agency : You proactively identify technical risks and opportunities and drive solutions forward Leadership mindset : You enjoy guiding others, sharing knowledge, and raising the technical bar of the team Growth orientation: You continuously learn and help others grow alongside you AI enthusiasm: You’re interested in leveraging AI to improve both user experience and developer productivity Strong communication skills : You clearly articulate technical decisions to engineers, product managers, and designers Product thinking : You care deeply about the impact of frontend solutions on users and the business Adaptability : You're comfortable working across the stack when needed and navigating evolving requirements Collaborative approach : You foster healthy team dynamics and constructive technical discussions English proficiency: C1 or higher – you communicate confidently in English in both technical and business contexts Technical Skills Strong, hands-on experience with React and modern frontend development Expertise in JavaScript, TypeScript, and modern frontend tooling Experience leading or owning frontend architecture in production environments Commercial experience with React Native (nice to have) Solid understanding of responsive design, accessibility, and cross-browser compatibility Experience with state management solutions (Redux, React Query, Zustand, etc.) Strong knowledge of frontend performance optimization and best practices Familiarity with backend technologies (Java) and APIs for effective full-stack collaboration Experience with version control systems (Git) and collaborative development workflows Familiarity with AI frameworks and tools, or strong interest in developing expertise in this area Experience with AI-assisted programming and implementing AI-powered features is a plus Client – why choose this particular client from the Jit portfolio? Our client is an innovative, international technology company operating in the proptech and construction tech sectors. Their mission is to make building projects more collaborative and efficient worldwide. They have created a modern cloud platform that enables effective management of project data throughout the entire building lifecycle – from planning and design, through construction, to maintenance. The company operates globally and collaborates with leading partners in the architecture, engineering, and construction industries. Its solutions are built on open standards , ensuring smooth integration with other tools and easy access to information for all project participants About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Senior Lead Engineer role focused on leading architecture and delivery of high-scale enterprise systems using React, Node.js, and TypeScript, while integrating advanced AI agents into deterministic workflows. The position combines hands-on development, technical leadership, and ownership of mission-critical systems in close collaboration with AI architects. It offers high impact on production-ready AI solutions for global enterprises. 🗂️ Requirements: 10+ years of software engineering experience, Proven experience in Lead, Principal, or Expert engineering roles, Expert-level knowledge of React, Expert-level knowledge of Node.js, Expert-level knowledge of TypeScript, Experience designing and scaling enterprise systems, Experience conducting code reviews and mentoring engineers, Ability to integrate AI/LLM agents into enterprise systems, Strong problem-solving skills for complex production issues, English proficiency at minimum B2 level 📃 Skills: React, Node.js, TypeScript, JavaScript, LLM, AI, Neurosymbolic, State, Machines, Python, NX, Snowflake 🏢 Description: Position: Senior Lead Engineer (React, Node.js & AI) Location: Kraków (On-site) Salary: 35,000 – 45,000 PLN net + VAT (B2B) + 10% yearly performance bonus About the Project Our Client is an innovative software company specializing in transforming raw AI capabilities into durable, deterministic enterprise systems. Known for their elite engineering culture, they specialize in delivering high-scale, production-ready AI solutions for global Fortune 500 enterprises. As a Senior Lead Engineer, you will become the right hand to the Principal Architect. This is a high-impact, operational leadership role where you will take full accountability for core React/Node/TS interfaces and backend systems, mentor the engineering team, and seamlessly integrate cutting-edge AI agents into complex enterprise workflows. Your leadership will drive delivery, allowing the Principal Architect to focus entirely on macro-level AI strategies and frontier models. Your Role Architecture & Delivery: Designing, building, and scaling core enterprise systems and interfaces using React, Node.js, and TypeScript. Technical Leadership: Taking extreme ownership of the codebase, enforcing world-class standards, conducting code reviews, and mentoring the engineering team to help them grow into independent problem solvers. AI Integration: Collaborating closely with the AI architecture team to embed LLM agents, neurosymbolic systems, and state machines into secure, deterministic enterprise workflows. Problem Solving: Acting as the ultimate escalation point for complex technical challenges, leading the charge to unblock production when critical issues arise. Strategic Execution: Translating high-level business requirements and macro-architecture directly into flawless, high-performing code that creates durable operating leverage. Requirements Experience: 10+ years of hard-core software engineering experience, with a proven track record in Lead, Principal, or Expert roles. Tech Stack Mastery: Absolute, atomic-level expertise in React, Node.js, and TypeScript ecosystem. Extreme Ownership: A proactive mindset – you don’t wait for tasks; you identify problems, design solutions, align resources, and deliver with absolute certainty. Leadership & Mentoring: Ability to elevate the team, set uncompromising quality standards, and guide junior/mid engineers. Business DNA: Deep understanding that code serves tangible business goals (ROI) and creates long-term value, rather than just being technical art. Communication: English at minimum B2 level to collaborate effectively with an elite team and global partners. Nice to have Practical experience or strong interest in Python, NX, and Snowflake. Hands-on exposure to frontier AI/LLM models and agents. What We Offer Global Impact: The chance to build next-generation neurosymbolic systems redefining how global enterprises utilize AI. Elite Environment: Direct collaboration alongside C-level executives, visionaries, and core software architects. High-End Hardware: New Apple MacBook Pro and external monitors provided as needed. Flexible Culture: Flexible working hours within a modern, fully-equipped office setup. Premium Office Perks: Access to a modern office in Kraków featuring a playroom, bike parking, shower, free coffee, beverages, and snacks (with no dress code). Growth & Benefits: Dedicated conference budget to support your continuous professional development.