Node.js Tech Lead (Integration)

🏢 Summary: Senior Frontend Engineer role for developing an AI-powered wealth management platform with greenfield frontend features, autonomous AI integrations, and complex state management. The position focuses on technical ownership, scalable frontend architecture, and delivery of high-quality Angular applications in a remote EU-based B2B engagement. 🗂️ Requirements: 5+ years of professional experience with Angular and TypeScript, Strong knowledge of modern Angular, Experience with standalone components, Experience with signals, Experience with change detection, Experience with NgRx and RxJS, Frontend architecture expertise, State management expertise, Experience with testing, tooling, and build pipelines, Hands-on experience with AI coding agents, Ability to guide and validate AI-generated code, Strong debugging and code review skills, Experience with API client code generation, Experience with strict linting and formatting, Experience with automated E2E testing, Understanding of clean code and frontend design patterns, Fluency in Polish, Advanced English level (B2/C1) 📃 Skills: Angular, TypeScript, NgRx, RxJS, AngularMaterial, AI, LLM, Claude, E2E, API, Linting, Formatting 🏢 Description: Contract: B2B Rate: 140 - 170 zł/h, depending on skills and experience Location: Remote within the EU Duration: 6 -12 months Start: ASAP Project: Frontend development of an advanced, AI-powered wealth management platform, focused on building next-generation greenfield features and integrating autonomous AI agents. Key Technologies/Areas Angular (Modern reactive features & Standalone architecture) TypeScript (Strict mode ecosystem) State Management (NgRx & RxJS) Angular Material UI framework Agentic AI and LLM integration (Streaming data, Dynamic UI generation) Frontend Architecture & Code Quality Automation Automated E2E Testing Frameworks AI-assisted development tools (e.g., Claude Code) Project Overview We are looking for a Senior Frontend Engineer with a strong generalist mindset to take technical ownership of the client-facing layer of a sophisticated, AI-driven platform designed for private wealth trust managers. You will be expected to independently assess available options, ask the right questions and make sound, defensible architectural and technical decisions. The platform is being developed as a focused, single-portal application built around a rich workspace. The frontend includes complex, domain-heavy NgRx state management, custom visualisation and diagramming capabilities, as well as new agentic AI features such as streaming model responses, dynamically generated user interfaces and autonomous agent workflows. A significant part of the upcoming work is greenfield, giving you real influence over the frontend architecture and engineering standards. Responsibilities End-to-end delivery of frontend features, collaborating closely with product and design teams to balance user experience with technical feasibility. Architect and evolve a highly scalable, clean codebase designed for long-term maintainability without technical debt. Write elegant, self-explanatory, and robust production code, prioritizing clean simplicity over over-engineering. Set up, optimize, and maintain automated end-to-end (E2E) testing suites to guarantee platform stability. Incorporate AI coding assistants (such as Claude Code) into your everyday engineering workflow, showing proficiency in guiding, auditing, and validating AI-generated output. Actively participate in code reviews, technical grooming, and architectural alignment sessions while upholding uncompromisingly high engineering standards. Optimize frontend performance, specifically focusing on the predictability and speed of AI-driven real-time interactions. Requirements At least 5 years of professional software development experience with Angular and TypeScript Strong knowledge of modern Angular, including standalone components, signals, change detection, NgRx and RxJS. Broad frontend expertise across UI development, architecture, state management, testing, tooling and build pipelines. Hands-on experience using AI coding agents, such as Claude Code, as part of your daily development workflow. Ability to effectively steer AI agents, provide clear context and constraints, and break complex tasks into actionable steps. Strong skills in reviewing, testing, debugging and verifying AI-generated code before using it in production. Ability to work with incomplete requirements, ask the right questions and make sound technical trade-offs. Strong understanding of clean code, frontend design patterns and long-term maintainability. Experience with API client code generation, strict linting and formatting, and automated E2E testing. Fluency in Polish and an advanced command of English (B2/C1) , enabling smooth communication in an international setting. Nice to have Experience building complex data visualization tools, interactive dashboards, or custom charting solutions. Background in FinTech, wealth management, or domain-heavy SaaS platforms. Familiarity with event-driven frontend architectures or real-time data streaming. 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 the EU and flexible working hours. High engineering culture with a focus on growth and learning. Opportunity to work on a mature SaaS platform and production AI solutions. Multinational teams. Benefits: Private medical care, Multisport card, and workation opportunities.

🏢 Summary: Senior Software Engineer role focused on backend development for an established SaaS platform using Scala and Python, with expansion of AI-powered features and integrations. The project involves building scalable backend services, integrating AI/LLM solutions, and supporting production-grade architecture and CI/CD workflows in a remote EU-based B2B engagement. 🗂️ Requirements: 7+ years of professional software development experience, Strong production experience with Scala, Strong proficiency in Python, Experience developing production-grade backend applications, Hands-on experience building and maintaining backend services, Ability to work across Scala and Python codebases, Experience with automated testing, Experience with version control, Experience with code reviews, Experience with CI/CD, Understanding of scalable and maintainable software architecture, Ability to independently solve technical problems, Strong communication skills, Fluency in Polish, Advanced English level (B2/C1) 📃 Skills: Scala, Python, REST, CI/CD, Testing, APIs, SaaS, LLM, ElasticSearch, AWS, Azure, GCP, PHP 🏢 Description: Contract: B2B Rate: 150-160 zł/h net + VAT depending on skills and experience Location: Remote within the EU Duration: 6+ months, with the possibility of long-term cooperation Start: ASAP Project: Backend engineering project focused on developing and maintaining a SaaS platform and expanding its AI-powered capabilities. Key Technologies/Areas Scala Python Backend development REST APIs SaaS platforms CI/CD Automated testing Nice to have: AI and LLM integrations, ElasticSearch, AWS, Azure, or GCP Project Overview You’ll join an existing engineering team as a Senior Software Engineer , contributing to the development and maintenance of backend services for an established SaaS platform. The role combines Scala and Python development . Scala is a core technology used within the existing platform, while a significant part of the day-to-day development will be carried out in Python. You will also support the expansion of AI-powered functionality across the product, including integrations with internal and external AI services, LLM platforms, transcription solutions, and other machine-learning-based capabilities. This is a hands-on role for an experienced backend engineer who can work independently, contribute to architectural and technical decisions, and build reliable, scalable, production-ready solutions. Responsibilities Develop, maintain, and extend backend services using Scala and Python. Design and implement scalable functionality across an existing SaaS platform. Build and expand AI-powered features within the product. Integrate internal and external AI services through APIs, including LLM-based platforms and similar tools. Support the maintenance and further development of existing Scala-based services. Develop new backend functionality primarily in Python. Design reliable and maintainable integrations between platform services and external systems. Write clean, testable, and well-documented production code. Participate in technical discussions, code reviews, and architectural decisions. Ensure the quality, scalability, performance, and security of implemented solutions. Work closely with software engineers, product teams, and other technical stakeholders. Support CI/CD processes and modern software development workflows. Troubleshoot production issues and improve the stability of existing services. Requirements At least 7 years of professional software development experience. Strong production experience with Scala . Strong proficiency in Python and experience developing production-grade backend applications. Hands-on experience building and maintaining backend services. Ability to work effectively across both Scala and Python codebases. Strong understanding of software engineering best practices. Experience with automated testing, version control, code reviews, and CI/CD. Good understanding of scalable and maintainable software architecture. Ability to independently analyze technical problems and propose practical solutions. Strong communication skills and the ability to collaborate within an international engineering team. Fluency in Polish and an advanced level of English (B2/C1) Nice to have Commercial experience working with LLMs or generative AI solutions . Experience integrating AI services or AI models into production systems. Experience building integrations with external AI platforms through APIs. Experience with AI-based transcription, speech-to-text, or related technologies. Experience with ElasticSearch . Experience with public cloud AI services available in AWS, Azure, or GCP. Experience developing or maintaining PHP applications. Previous experience working on SaaS products. Understanding of AI service scalability, monitoring, performance, and cost optimisation. 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 the EU and flexible working hours. High engineering culture with a focus on growth and learning. Opportunity to work on a mature SaaS platform and production AI solutions. Multinational teams. Benefits: Private medical care, Multisport card, and workation opportunities.

🏢 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 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 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: 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: Senior .NET Developer role focused on building cloud-native, data-intensive platforms for intelligent heating and energy management systems. The position involves developing scalable event-driven services, real-time analytics solutions, and distributed systems in a modern cloud environment. You will collaborate with cross-functional teams to design and deliver robust backend and cloud infrastructure components. 🗂️ Requirements: Minimum 5 years commercial experience with C# and .NET, Hands-on experience with Kubernetes, Basic knowledge of Azure cloud, Strong practical experience with PostgreSQL, Experience with event-driven architecture, Experience with asynchronous messaging systems, English proficiency at B2 level or higher, Ability to work independently and in cross-functional teams 📃 Skills: C#, .NET, Kubernetes, Azure, PostgreSQL, Kafka, Python, React, TypeScript, Iceberg, GreptimeDB, SpiceDB 🏢 Description: Salary: 1000 - 1500 PLN/MD + VAT Remote: flexible hybrid from Gdynia / Kraków / Warszawa / Rzeszów Why choose this offer? You will have the opportunity to develop and improve a software tool which helps provide customers all over the world with tailor-made heating and cooling solutions Your work will help create more sustainable, cost-efficient and environment friendly heating and cooling solutions The Jit community will bring you a nice time during regular integration meetings Project We are looking for experienced Senior .Net Developer who will be part of a team developing modern software solutions for the energy and smart building industry, focused on intelligent heating and hot water management systems. You will join a team building modern data-intensive and cloud-native software platforms focused on scalable analytics, distributed event processing, and real-time operational insights. You’ll work closely with backend, frontend, and platform engineers to design and develop event-driven services, cloud infrastructure, and user-facing applications. Expected competences and knowledge Strong experience with C# / .NET – min. 5 years of commercial experience Hands-on experience with Kubernetes and basic Azure cloud knowledge Experience with Python Strong practical experience with PostgreSQL Experience with event-driven architecture and asynchronous messaging systems English proficiency at a minimum B2 level Ability to work independently and as part of a cross-functional engineering team Nice to have : Experience with migration and platform transformation projects React / TypeScript skills Python skills focused on data engineering, analytics, ETL, and data processing Hands-on experience with Kafka Experience with modern data platform ecosystems Experience designing and developing cloud-native architectures Technologies you'll work with C# / .NET Python Apache Kafka Apache Iceberg PostgreSQL GreptimeDB / Time-series databases React, TypeScript Kubernetes Azure Cloud SpiceDB / ReBAC Event-driven microservices architecture Client – why choose this particular client from the Jit portfolio? Our Client engineers technologies that enable the world of tomorrow to do more with less. They meet the growing need for infrastructure, food supply, energy efficiency and climate-friendly solutions . Their products and services are used in areas such as refrigeration, air conditioning, heating, motor control and mobile machinery. They are also active in the field of renewable energy as well as district heating infrastructure for cities and urban communities. Their innovative engineering dates back to 1933 and today our Client is a world-leader , employing more than 27,000 employees and serving customers in more than 100 countries . They are still privately held by the founding family. 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 770 experienced experts , to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams. Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.

🏢 Summary: Senior .NET Developer role focused on building cloud-native, data-intensive platforms for intelligent heating and smart building systems. The position involves developing event-driven services, scalable analytics, and real-time operational insights using modern backend, cloud, and data technologies. Flexible hybrid work is available from multiple Polish cities. 🗂️ Requirements: 5+ years commercial experience with C#, .NET experience, Experience with Kubernetes, Basic Azure knowledge, Practical Python experience, Strong PostgreSQL experience, Experience with event-driven architecture, Experience with asynchronous messaging systems, English level B2 or higher, Ability to work in cross-functional teams 📃 Skills: C#, .NET, Python, Kafka, Iceberg, PostgreSQL, GreptimeDB, React, TypeScript, Kubernetes, Azure, SpiceDB, Microservices 🏢 Description: Salary: 1250 - 1500 PLN/MD + VAT Remote: flexible hybrid from Gdynia / Kraków / Warszawa / Rzeszów Why choose this offer? You will have the opportunity to develop and improve a software tool which helps provide customers all over the world with tailor-made heating and cooling solutions Your work will help create more sustainable, cost-efficient and environment friendly heating and cooling solutions The Jit community will bring you a nice time during regular integration meetings Project We are looking for experienced Senior .Net Developer who will be part of a team developing modern software solutions for the energy and smart building industry, focused on intelligent heating and hot water management systems. You will join a team building modern data-intensive and cloud-native software platforms focused on scalable analytics, distributed event processing, and real-time operational insights. You’ll work closely with backend, frontend, and platform engineers to design and develop event-driven services, cloud infrastructure, and user-facing applications. Expected competences and knowledge Strong experience with C# / .NET – min. 5 years of commercial experience Hands-on experience with Kubernetes and basic Azure cloud knowledge Practical experience with Python Strong practical experience with PostgreSQL Experience with event-driven architecture and asynchronous messaging systems English proficiency at a minimum B2 level Ability to work independently and as part of a cross-functional engineering team Nice to have : Experience with migration and platform transformation projects React / TypeScript skills Python skills focused on data engineering, analytics, ETL, and data processing Hands-on experience with Kafka Experience with modern data platform ecosystems Experience designing and developing cloud-native architectures Technologies you'll work with C# / .NET Python Apache Kafka Apache Iceberg PostgreSQL GreptimeDB / Time-series databases React, TypeScript Kubernetes Azure Cloud SpiceDB / ReBAC Event-driven microservices architecture Client – why choose this particular client from the Jit portfolio? Our Client engineers technologies that enable the world of tomorrow to do more with less. They meet the growing need for infrastructure, food supply, energy efficiency and climate-friendly solutions . Their products and services are used in areas such as refrigeration, air conditioning, heating, motor control and mobile machinery. They are also active in the field of renewable energy as well as district heating infrastructure for cities and urban communities. Their innovative engineering dates back to 1933 and today our Client is a world-leader , employing more than 27,000 employees and serving customers in more than 100 countries . They are still privately held by the founding family. 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 770 experienced experts , to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams. Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.

🏢 Summary: Senior .NET Developer role focused on building scalable, cloud-native platforms for intelligent heating and energy management systems in the smart building industry. The position involves developing event-driven services, cloud infrastructure, and user-facing applications within a distributed energy environment. Fully remote or hybrid work with competitive daily rate. 🗂️ Requirements: Minimum 5 years experience with C# and .NET, Strong knowledge of Azure cloud ecosystem, Experience with MongoDB, Experience with event-driven architecture and NATS, Familiarity with React and TypeScript, Experience with ReBAC and SpiceDB, Familiarity with PostgreSQL and EF Core, English proficiency at B2 level or higher, Understanding of optimization and data workloads in Python, Ability to work independently and in cross-functional teams 📃 Skills: C#, .NET, Azure, MongoDB, NATS, React, TypeScript, SpiceDB, ReBAC, PostgreSQL, EFCore, Python, Kafka, Kubernetes 🏢 Description: Salary: 1000 - 1280 PLN/MD + VAT Remote: flexible hybrid from Gdynia / Kraków / Warszawa / Rzeszów Why choose this offer? You will have the opportunity to develop and improve a software tool which helps provide customers all over the world with tailor-made heating and cooling solutions Your work will help create more sustainable, cost-efficient and environment friendly heating and cooling solutions The Jit community will bring you a nice time during regular integration meetings Project We are looking for experienced Senior .Net Developer who will be part of a team developing modern software solutions for the energy and smart building industry, focused on intelligent heating and hot water management systems. The project involves building scalable cloud-native platforms that support monitoring, optimization, and automation of distributed energy devices used in residential and commercial environments. You’ll work closely with backend, frontend, and platform engineers to design and develop event-driven services, cloud infrastructure, and user-facing applications. Expected competences and knowledge Strong experience with C# / .NET - min. 5 years of experience Deep knowledge of Azure cloud ecosystem Experience with MongoDB Experience with event-driven architecture and NATS Familiarity with React / TypeScript Experience with ReBAC / SpiceDB Familiarity with PostgreSQL / EF Core English proficiency at a minimum B2 level Understanding of optimization and data-related workloads in Python Ability to work independently and as part of a cross-functional engineering team Nice to have : Experience with Kafka Experience with Kubernetes Technologies you'll work with C# / .NET Azure Cloud React, TypeScript MongoDB, PostgreSQL Kafka Python Kubernetes Event-driven microservices architecture Client – why choose this particular client from the Jit portfolio? Our Client engineers technologies that enable the world of tomorrow to do more with less. They meet the growing need for infrastructure, food supply, energy efficiency and climate-friendly solutions . Their products and services are used in areas such as refrigeration, air conditioning, heating, motor control and mobile machinery. They are also active in the field of renewable energy as well as district heating infrastructure for cities and urban communities. Their innovative engineering dates back to 1933 and today our Client is a world-leader , employing more than 27,000 employees and serving customers in more than 100 countries . They are still privately held by the founding family. 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 770 experienced experts , to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams. Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.

🏢 Summary: Senior .NET Developer role focused on building scalable, cloud-native platforms for intelligent heating and energy management systems in the smart building industry. The position involves developing event-driven services, cloud infrastructure, and user-facing applications supporting distributed energy devices. The project centers on sustainable, efficient heating and cooling solutions. 🗂️ Requirements: Minimum 5 years experience with C# and .NET, Experience with Azure cloud ecosystem, Experience with MongoDB, Experience with event-driven architecture, English proficiency at B2 level or higher, Ability to work independently and in cross-functional team 📃 Skills: C#, .NET, Azure, MongoDB, PostgreSQL, Kafka, Kubernetes, React, TypeScript, Python, Microservices 🏢 Description: Salary: 1000 - 1500 PLN/MD + VAT Remote: flexible hybrid from Gdynia / Kraków / Warszawa / Rzeszów Why choose this offer? You will have the opportunity to develop and improve a software tool which helps provide customers all over the world with tailor-made heating and cooling solutions Your work will help create more sustainable, cost-efficient and environment friendly heating and cooling solutions The Jit community will bring you a nice time during regular integration meetings Project We are looking for experienced Senior .Net Developer who will be part of a team developing modern software solutions for the energy and smart building industry, focused on intelligent heating and hot water management systems. The project involves building scalable cloud-native platforms that support monitoring, optimization, and automation of distributed energy devices used in residential and commercial environments. You’ll work closely with backend, frontend, and platform engineers to design and develop event-driven services, cloud infrastructure, and user-facing applications. Expected competences and knowledge Strong experience with C# / .NET - min. 5 years of experience Knowledge of Azure cloud ecosystem Experience with MongoDB Experience with event-driven architecture English proficiency at a minimum B2 level Ability to work independently and as part of a cross-functional engineering team Nice to have : Experience with Kafka Experience with Kubernetes Familiarity with React / TypeScript Familiarity with PostgreSQL Experience with migration and platform transformation projects Technologies you'll work with C# / .NET Azure Cloud React, TypeScript MongoDB, PostgreSQL Kafka Python Kubernetes Event-driven microservices architecture Client – why choose this particular client from the Jit portfolio? Our Client engineers technologies that enable the world of tomorrow to do more with less. They meet the growing need for infrastructure, food supply, energy efficiency and climate-friendly solutions . Their products and services are used in areas such as refrigeration, air conditioning, heating, motor control and mobile machinery. They are also active in the field of renewable energy as well as district heating infrastructure for cities and urban communities. Their innovative engineering dates back to 1933 and today our Client is a world-leader , employing more than 27,000 employees and serving customers in more than 100 countries . They are still privately held by the founding family. 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 770 experienced experts , to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams. Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.