Senior C++ Developer

🏢 Summary: Hybrid QA Engineer role focused on testing advanced energy applications for electrical power networks, combining manual and automated QA in an international Agile environment. The position involves Python-based test automation, CI/CD integration, and collaboration with cross-functional teams to support innovative energy solutions. Candidates will work with modern QA tools and gain expertise in both software quality assurance and power systems. 🗂️ Requirements: 3+ years of Software Quality Assurance experience, Experience with test automation in Python, Knowledge of QA methodologies and test design techniques, Experience with testing tools, Experience working in Agile/Scrum environments, Knowledge of SDLC, Experience with Git, Strong analytical and problem-solving skills, English level B2 or higher 📃 Skills: Python, Azure, DevOps, Zephyr, Git, Docker, Kubernetes, Gherkin, OPC, IEC60870-5-104, MODBUS, IEEEC37.118, Agile, Scrum, CI/CD 🏢 Description: Salary: 500-800 PLN/day on B2B Work model: hybrid from Kraków (1-2 days per week from the office) Why choose this offer? You can expect a flexible work organization The international work environment will give you the opportunity to interact with the English language on a daily basis The Jit community will bring you a nice time during regular integration meetings Work on cutting-edge technologies supporting the global energy transition Collaborate with international teams and industry experts Grow your technical expertise in both Software QA and Power Systems Project We are looking for a QA Engineer to join a global product team developing advanced energy applications that support the operation and reliability of electrical power networks. You'll work alongside software developers, scientists, and product managers to deliver innovative solutions that contribute to a smarter and greener energy future. Responsibilities you'll have Plan and execute software testing strategies based on business and functional requirements Design, develop, and maintain automated and manual test cases Perform functional and non-functional testing of customer-facing solutions Integrate automated tests into CI/CD pipelines using Azure DevOps Validate real-life scenarios using laboratory equipment Manage test execution and reporting through Zephyr Scale and Azure DevOps Collaborate with development teams to identify, troubleshoot, and resolve issues Drive continuous improvements in QA processes, testing standards, and product quality Participate actively in Agile/Scrum ceremonies and advocate testing best practices Build expertise in Power Systems and support the product throughout its lifecycle Mentor team members and promote a quality-first mindset across the organization Expected competences and knowledge 3+ years of experience in Software Quality Assurance Hands-on experience with test automation in Python Strong understanding of QA methodologies , test design techniques, and testing tools Experience working in Agile/Scrum environments Familiarity with SDLC and version control systems ( Git ) Strong analytical and problem-solving skills Good command of English (at least B2) Nice to have Knowledge of Power Systems Experience with industrial communication protocols (OPC, IEC 60870-5-104, MODBUS, IEEE C37.118) Docker and Kubernetes experience BDD testing approaches (Gherkin) ISTQB certification Experience with performance , security , or compliance testing Technologies you'll work with Python Azure DevOps Zephyr Git Docker Kubernetes Gherkin Client – why choose this particular client from the Jit portfolio? Our Client is an established global technology leader driving the digital transformation and innovation required to accelerate the transition toward a carbon-neutral future . Serving customers across the utility, industry, and infrastructure sectors, they provide cutting-edge solutions and services across the entire energy value chain. The organization is actively evolving the worlds energy systems to make them more sustainable, flexible, and secure, while precisely balancing social, environmental, and economic value. With a proven track record and an unparalleled installed technological base spanning well over 100 countries, the company operates on a massive global scale. 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: Hybrid B2B role in a financial project focused on end-to-end ownership of a legacy system (4450 / LETU), including analysis of data flows, integrations, incident handling, and lifecycle decisions. The position involves working across C/C++ codebase, UI layer, VBA templates, and Java integrations while supporting regulatory changes and deployments. The role combines maintenance, modernization, and operational stability improvements in an international Scrum environment. 🗂️ Requirements: Strong C programming skills, Strong C++ programming skills, Experience with legacy system maintenance, Ability to analyze data flows and system integrations, Experience with incident investigation and debugging, Experience with CI/CD pipelines, Experience working in Scrum, Knowledge of credit domain, Experience with code packaging and deployment, Ability to work with VBA and Java components 📃 Skills: C, C++, DScreen, VBA, Java, Scrum, CI/CD, GitHub, Copilot 🏢 Description: Salary: 900 - 1300 PLN/day on B2B Work model: hybrid from Warszawa (2/3 days per week from the office) Why choose this offer? You can expect a flexible work organization The international work environment will give you the opportunity to interact with the English language on a daily basis Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit) The Jit community will bring you a nice time during regular integration meetings Project You will be involved in a financial project focused on taking end-to-end ownership of 4450 / LETU and related components, including analysis of data flows, integrations, and dependencies across systems, support for mandatory regulatory or business-driven changes, incident investigation and debugging, packaging and deployment activities, as well as contributing to lifecycle decisions regarding maintainability, modernisation, or decommissioning of the solution . Responsibilities you'll have Take end-to-end ownership of 4450 / LETU and related components Analyse and understand data flows, integrations, and dependencies across systems Support mandatory regulatory or business-driven changes Investigate incidents and perform debugging activities Support packaging and deployment activities Work across C / C++ codebase, DScreen UI layer, VBA-based document templates, and minor Java integration components Drive knowledge consolidation through reverse engineering and KT structuring Improve documentation and operational stability Contribute to lifecycle decisions: maintain vs. modernise vs. decommission Participate in effort vs. value trade-off discussions with stakeholders Expected competences and knowledge C / C++ Scrum CI/CD Use of GitHub Copilot Domain knowledge of credit Technologies you'll work with C C++ DScreen VBA Java GitHub Copilot Client – why choose this particular client from the Jit portfolio? Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client's premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer's work atmosphere is epitomized by the Scandinavian culture , which is conducive to people who place emphasis on work-life balance and feedback culture . Furthermore, all projects are executed in international teams, giving constant exposure to the English language. 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 and maintaining backend services, APIs, and scalable microservice solutions for critical European energy trading platforms. The position involves working with C#, .NET, SQL, messaging technologies, and CI/CD tools in a hybrid work model with cross-functional collaboration. Experience with cloud, containerization, and high-load distributed systems is valued. 🗂️ Requirements: 10+ years experience with C# and .NET, Experience with SQL databases, Experience with microservices architecture, Experience with RabbitMQ or Kafka, Experience with CI/CD tools, Ability to design and maintain backend services and APIs, Experience with deployment automation, Ability to participate in architecture and technical discussions 📃 Skills: C#, .NET, SQL, RabbitMQ, Kafka, CI/CD, GitHub, GitHubActions, Octopus, Azure, Angular, Kubernetes, Orleans 🏢 Description: Salary: 1000 - 1300 PLN/MD on B2B Work model: elastic hybrid from Gdańsk / Warsaw / Kraków / Rzeszów (1 day from the office a week) Why choose this offer? Working for a leading European energy exchange Collaboration with a team of specialists to create innovative solutions using the latest technologies You can expect a flexible work organization The Jit community will bring you a nice time during regular integration meetings Project We're seeking a Senior .NET Developer who will join our client, a leading provider of electricity market solutions operating across the European energy sector, supporting the development and operation of critical trading platforms and digital services. Responsibilities you'll have Design, develop, and maintain backend services and APIs using C# and .NET Build and enhance scalable microservice-based solutions Develop and optimize SQL database integrations and data processing workflows Implement and maintain messaging solutions using RabbitMQ, Kafka, or similar technologies Contribute to CI/CD pipelines and deployment automation Collaborate with cross-functional teams to deliver high-quality software solutions Participate in code reviews , architecture discussions, and technical decision-making Monitor, troubleshoot, and improve application performance , scalability, and reliability Expected competences and knowledge Experienced C# .NET developer (ideally 10+ yrs), with experience of SQL databases Experience with microservices and messaging infra (RabbitMQ & Kafka or similar) Experience in CI/CD tools such as GitHub, GitHub Actions, Octopus Deploy or similar What we consider a plus Fintech experience Frontend experience (Angular or similar) Experience using Microsoft Azure platform and infrastructure services Some prior experience or knowledge about containerization and container orchestration (Kubernetes) Experience of implementing high-load and scalable applications using the Actor Model (Orleans) Technologies you'll work with C# .NET SQL Azure Messaging solutions CI/CD tools Angular Client – why choose this particular client from the Jit portfolio? Our client is the leading European power market company which delivers efficient, simple, and secure trading across Europe . In 2023 they celebrate 30 years of powering the market. The company offers day-ahead and intraday trading, clearing and settlement, and additional services to customers, regardless of size or location. Currently, 360 traders from 20 countries operate on their markets. The company provides services on markets in the Nordic and Baltic regions, Germany, Poland, France, the Netherlands, Belgium, Austria, Luxembourg, and the UK. Our client is a Nominated Electricity Market Operator (NEMO) in 15 European countries, while also servicing power markets in Bulgaria, Croatia, and Georgia . In 2021 they had a total traded power turnover of 963 TWh. Our client has three decades of power market experience built on offering flexibility, transparency, innovation, greater choice, and opportunities on the electricity market. 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 designing and maintaining scalable backend services and microservice-based solutions for a European energy trading platform. The position involves building high-performance APIs, integrating messaging systems, and contributing to CI/CD automation in a hybrid work model. The offer includes collaboration with experienced specialists and work with modern technologies. 🗂️ Requirements: 10+ years experience with C# and .NET, Strong experience with SQL databases, Experience with microservices architecture, Experience with messaging systems (RabbitMQ or Kafka), Experience with CI/CD tools (GitHub, GitHub Actions, Octopus Deploy or similar), Ability to design and maintain backend services and APIs, Experience in performance optimization and troubleshooting 📃 Skills: C#, .NET, SQL, RabbitMQ, Kafka, GitHub, GitHubActions, OctopusDeploy, Azure, Angular, Kubernetes, Orleans, CI/CD, Microservices 🏢 Description: Salary: 1000 - 1300 PLN/MD on B2B Work model: elastic hybrid from Gdańsk / Warsaw / Kraków / Rzeszów (1 day from the office a week) Why choose this offer? Working for a leading European energy exchange Collaboration with a team of specialists to create innovative solutions using the latest technologies You can expect a flexible work organization The Jit community will bring you a nice time during regular integration meetings Project We're seeking a Senior .NET Developer who will join our client. Responsibilities you'll have Design, develop, and maintain backend services and APIs using C# and .NET Build and enhance scalable microservice-based solutions Develop and optimize SQL database integrations and data processing workflows Implement and maintain messaging solutions using RabbitMQ, Kafka, or similar technologies Contribute to CI/CD pipelines and deployment automation Collaborate with cross-functional teams to deliver high-quality software solutions Participate in code reviews , architecture discussions, and technical decision-making Monitor, troubleshoot, and improve application performance , scalability, and reliability Expected competences and knowledge Experienced C# .NET developer (ideally 10+ yrs), with experience of SQL databases Experience with microservices and messaging infra (RabbitMQ & Kafka or similar) Experience in CI/CD tools such as GitHub, GitHub Actions, Octopus Deploy or similar What we consider a plus Fintech experience Frontend experience (Angular or similar) Experience using Microsoft Azure platform and infrastructure services Some prior experience or knowledge about containerization and container orchestration (Kubernetes) Experience of implementing high-load and scalable applications using the Actor Model (Orleans) Technologies you'll work with C# .NET SQL Azure Messaging solutions CI/CD tools Angular Kubernetes Client – why choose this particular client from the Jit portfolio? Our client is the leading European power market company which delivers efficient, simple, and secure trading across Europe . In 2023 they celebrate 30 years of powering the market. The company offers day-ahead and intraday trading, clearing and settlement, and additional services to customers, regardless of size or location. Currently, 360 traders from 20 countries operate on their markets. The company provides services on markets in the Nordic and Baltic regions, Germany, Poland, France, the Netherlands, Belgium, Austria, Luxembourg, and the UK. Our client is a Nominated Electricity Market Operator (NEMO) in 15 European countries, while also servicing power markets in Bulgaria, Croatia, and Georgia . In 2021 they had a total traded power turnover of 963 TWh. Our client has three decades of power market experience built on offering flexibility, transparency, innovation, greater choice, and opportunities on the electricity market. 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: The offer is for a DevOps Engineer in a financial project focused on building and maintaining a secure API Management platform within a large banking environment. The role centers on automating infrastructure on AWS, developing CI/CD pipelines, and managing containerized environments to ensure stable and efficient API Gateway operations. You will work with modern DevOps tools to enhance monitoring, logging, and infrastructure as code practices. 🗂️ Requirements: Strong experience with AWS, Experience with Terraform for infrastructure provisioning, Hands-on experience with Docker, Hands-on experience with Kubernetes, Experience building and maintaining CI/CD pipelines, Experience with Ansible, Knowledge of monitoring and observability tools, Understanding of DevOps principles and best practices 📃 Skills: AWS, EKS, Terraform, Ansible, Docker, Kubernetes, CI/CD, Grafana, Prometheus, VictoriaMetrics, Splunk, Kong 🏢 Description: Salary: 1100 - 1450 PLN/day on B2B Work model: hybrid from Gdynia / Gdańsk / Warszawa / Łódź (2/3 days per week from the office) Why choose this offer? You can expect a flexible work organization The international work environment will give you the opportunity to interact with the English language on a daily basis Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit) The Jit community will bring you a nice time during regular integration meetings Project You will be involved in a financial project focused on enabling fast and secure integrations within a large banking environment and with external partners through a new API Management platform. In this role, you will automate infrastructure provisioning (e.g., EKS) using Terraform and build CI/CD pipelines for API deployments and configuration updates. You will also implement monitoring and logging solutions to ensure platform stability and performance. Additionally, you will support the development of an API Catalogue Portal and work with containerized applications in Kubernetes. The position includes maintaining and improving the API Gateway environment with a strong focus on automation and DevOps best practices. Responsibilities you'll have Automating infrastructure provisioning (e.g., EKS clusters) using Terraform and supporting infrastructure-as-code best practices Building, maintaining, and optimizing CI/CD pipelines for API deployments and configuration changes Managing and improving containerized environments based on Docker and Kubernetes Implementing and enhancing monitoring and logging solutions (e.g., Grafana, Prometheus/Victoria Metrics, Splunk) Supporting the development and operation of the API Gateway platform, including automation and performance improvements Contributing to infrastructure migration activities and continuous improvement of DevOps processes Assisting in the setup and maintenance of the API Catalogue Portal, including deployment pipelines and environment configuration Expected competences and knowledge Strong experience with AWS and infrastructure provisioning using Terraform Hands-on expertise in Docker and Kubernetes, including managing containerized environments Solid understanding of CI/CD pipelines and automation tools Experience with configuration management tools such as Ansible Knowledge of monitoring and observability tools (e.g., Grafana, Prometheus/Victoria Metrics, Splunk) Good understanding of DevOps principles and best practices Nice to have: familiarity with API gateway solutions such as Kong Gateway or similar Technologies you'll work with AWS (including EKS and cloud-native services) Terraform, Ansible Docker, Kubernetes CI/CD tools and pipelines Grafana, Prometheus / Victoria Metrics, Splunk API Gateway solutions (e.g., Kong Gateway or similar) Client – why choose this particular client from the Jit portfolio? Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client's premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer's work atmosphere is epitomized by the Scandinavian culture , which is conducive to people who place emphasis on work-life balance and feedback culture . Furthermore, all projects are executed in international teams, giving constant exposure to the English language. 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.

🏢 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 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: Remote B2B role focused on designing and implementing a new integration layer between BAM services and the PowerBid system, replacing the existing Exchange Tool. The position involves developing interfaces, ensuring system compatibility, and executing cutover and rollback strategies in an international energy market environment. You will work with modern backend and container technologies while influencing technical solutions. 🗂️ Requirements: Strong experience with Java, Strong experience with Spring Boot, Strong experience with Kotlin, Experience with Docker, Experience with Kubernetes, Experience with Kafka, Experience with PostgreSQL, Experience with Rich Client applications, Degree in Computer Science or related field, Knowledge of requirement engineering, Fluent English 📃 Skills: Java, SpringBoot, Kotlin, Kafka, Kubernetes, Docker, PostgreSQL, JavaScript, TypeScript, Angular 🏢 Description: Salary: 1000 - 1300 PLN/MD on B2B Work model: Remote Availability: ASAP or within 14 days preferred Why choose this offer? You will work in an international environment , collaborating with teams and stakeholders from different countries. Opportunity to take ownership of the development process and influence the technological direction of the solutions you build. The energy market is in an exciting transition , moving away from fossil fuels towards decentral solutions, renewables, and energy efficiency Project The project focuses on implementing a new integration layer between existing BAM services and the PowerBid system , replacing the current Exchange Tool. It includes designing and developing interfaces/adapters, ensuring system compatibility, and delivering full technical documentation. The work also involves defining and executing a cutover and rollback strategy to ensure a smooth transition. Expected competences and knowledge Strong experience with Java, Spring Boot, and Kotlin Hands-on experience with JavaScript/TypeScript and Angular (nice to have) Experience with Docker and Kubernetes Familiarity with Kafka and Postgres Experience with Rich Client applications Basic knowledge of the energy market in Germany and the Netherlands Degree in Computer Science or a related field Knowledge of requirement engineering Strong communication skills and ability to work independently Fluent English (German is a plus) Technologies you'll work with Java Spring Boot Kotlin Kafka Kubernetes Docker PostgreSQL JavaScript / TypeScript Angular Client – why choose this particular client from the Jit portfolio? Jit Team is cooperating with European energy company with approximately 20 000 employees. For more than 100 years, they have electrified industries, supplied energy to people’s homes and modernized way of living through innovation and cooperation. The purpose is to make fossil-free living possible within one generation . To be able to reach this ambitious goal we are looking for talented individuals who, in addition to their passion for their own role, also have strong team spirit and want to contribute to supporting a meaningful corporate mission. 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.