.NET Backend Developer with SQL Server

🏢 Summary: Backend Developer (.NET) role focused on development, maintenance, and modernization of an existing logistics system. The position involves working with legacy code, fixing bugs, refactoring, and improving business logic within a live operational environment. The role requires close collaboration with development and analytics teams. 🗂️ Requirements: 3–5 years of experience with .NET, Proficiency in C#, Experience with ASP.NET MVC or ASP.NET Core, Strong knowledge of SQL Server, Experience working with legacy codebases, Ability to debug and analyze complex issues, Experience with REST API, English level B2 minimum 📃 Skills: .NET, C#, ASP.NET, MVC, Core, SQL, SQLServer, REST, EntityFramework, Docker, UnitTesting 🏢 Description: Organizacja z branży logistycznej, rozwijająca własne systemy operacyjne, poszukuje osoby na stanowisko Backend Developer (.NET). Rola skupiona jest na rozwoju i stabilizacji istniejącego systemu oraz stopniowym jego unowocześnianiu. Zakres obowiązków Rozwój i utrzymanie systemu w technologii .NET Analiza i rozwiązywanie błędów w systemie (bugfixy) Refaktoryzacja istniejącego kodu Analiza logiki biznesowej i jej usprawnianie Współpraca z zespołem developerskim i analitycznym Praca z kodem bez pełnej dokumentacji Wymagania Min. 3–5 lat doświadczenia w .NET Dobra znajomość: C# ASP.NET (MVC / Core) SQL Server Doświadczenie w pracy z istniejącym kodem (legacy) Umiejętność debugowania i analizy problemów Znajomość REST API Znajomość języka angielskiego na poziomie minimum B2 Mile widziane Entity Framework (klasyczny i Core) Podstawy testów jednostkowych Znajomość Docker Oferujemy Pracę przy systemach o realnym wpływie na operacje biznesowe Możliwość rozwoju technologicznego Stabilne zatrudnienie Wpływ na jakość i rozwój systemu

🏢 Summary: Backend Developer (.NET) role in a long-term enterprise project focused on development and maintenance of large-scale business systems. The position involves designing and implementing new features, optimizing existing solutions, and ensuring high performance and stability. Hybrid work model with strong emphasis on code quality and system reliability. 🗂️ Requirements: Experience with C#, Knowledge of .NET Core / .NET 6+, Experience with ASP.NET / ASP.NET Core (MVC, Web API), Experience with Entity Framework / EF Core (migrations, query optimization), Experience with MS SQL Server (T-SQL, stored procedures, indexes, optimization), Experience with migration scripts and Entity Framework, Experience with SQL Server Agent Jobs, Knowledge of HTML5 and CSS3, Experience with JavaScript and jQuery, Knowledge of Bootstrap, Experience with IIS configuration and manual deployments, Ability to monitor logs and diagnose errors, Knowledge of Windows Server, Experience with REST and SOAP, Knowledge of JSON and XML, Experience with GIT 📃 Skills: C#, .NET, ASP.NET, MVC, WebAPI, EF, SQL, TSQL, MSSQL, HTML5, CSS3, JavaScript, jQuery, Bootstrap, IIS, WindowsServer, REST, SOAP, JSON, XML, GIT 🏢 Description: Dla naszego klienta poszukujemy Backend Developera (.NET) do długoterminowego projektu związanego z rozwojem i utrzymaniem systemów biznesowych o dużej skali. Rola obejmuje projektowanie i rozwój nowych funkcjonalności, optymalizację istniejących rozwiązań oraz współpracę z zespołami frontendowymi i infrastrukturalnymi. Projekt realizowany jest w środowisku enterprise, z naciskiem na jakość kodu, wydajność oraz stabilność systemów. Tryb pracy Praca hybrydowa: 3 dni pracy zdalnej 2 dni pracy w biurze w Warszawie Start Od zaraz (możliwość dopasowania terminu rozpoczęcia dla odpowiedniego kandydata) Wymagane kompetencje Backend / .NET Wymagane: C#, .NET Core / .NET 6+ ASP.NET / ASP.NET Core (MVC, Web API) Entity Framework / EF Core (migracje, optymalizacja zapytań) Mile widziane: .NET Framework 4.8 REST / SOAP Programowanie asynchroniczne i wielowątkowe Znajomość zasad SOLID i wzorców projektowych WCF, WinForms, WPF Office Interop / COM Interop Bazy danych Wymagane: MS SQL Server (T-SQL, procedury składowane, indeksy, optymalizacja) Skrypty migracyjne, praca z Entity Framework SQL Server Agent Jobs (harmonogramowanie i automatyzacja zadań) Mile widziane: SSIS (ETL) SAS, PostgreSQL, Oracle, Teradata Frontend Wymagane: HTML5, CSS3 JavaScript, jQuery Bootstrap DevOps / Utrzymanie Wymagane: IIS (konfiguracja, wdrożenia manualne) Monitorowanie logów i diagnostyka błędów Windows Server Mile widziane: WPF / WinForms (aplikacje desktopowe) Podstawy UNIX Dodatkowe kompetencje Komunikacja międzyserwisowa (REST, SOAP, JSON, XML) GIT

🏢 Summary: Full-time Lead/Senior Backend Developer role focused on building and operating distributed .NET-based systems in the pricing domain. The position involves end-to-end ownership of features, Infrastructure as Code, and continuous delivery within a multicultural, distributed setup. The assignment runs 7–9 months in Aarhus with flexibility, starting ASAP. 🗂️ Requirements: Strong experience with .NET, Experience with distributed systems, Experience with Infrastructure as Code, Experience with Kubernetes, Experience with Azure, Experience with PostgreSQL, Experience with Kafka, Experience with Helm, Experience with Terraform, Experience with Marten, Experience with Argo, Basic knowledge of React or similar frontend frameworks, Fluent English communication skills, Danish language proficiency 📃 Skills: .NET, Helm, Terraform, PostgreSQL, Marten, Kafka, Kubernetes, Azure, Argo, React 🏢 Description: emagine are seeking a skilled Lead Developer/Senior Backend Developer with strong experience in .NET frameworks to join our team in the pricing domain. The ideal candidate will possess extensive technical knowledge and demonstrate effective collaboration across multicultural teams. Main Responsibilities: As a Lead Developer, your main duties encompass: Solve tasks collaboratively through pair programming or mob programming sessions. Embrace cultural diversity within distributed teams across Denmark, Portugal, and India. Practice Continuous Delivery to ensure smooth deployments. Comfortable working in a complex domain with evolving requirements. Implement Infrastructure as Code ( IaC ) solutions. Adapt well to fast-changing environments and shifting priorities. Communicate effectively in English across distributed teams. Work with distributed systems and understand complex architectures . Take full ownership of features: “You build it, you run it” from development to production. Participate actively in refinement, planning, and retrospectives . Ensure stories meet Definition of Done , including testing and documentation. Collaborate with QA and other roles to maintain high quality standards . Key Requirements: Strong experience with .NET (9/10 proficiency). Helm . Terraform . PostgreSQL . Marten . Kafka . Kubernetes . Azure . Argo . Basic understanding of React or similar frontend frameworks for integration. Nice to Have: Experience with agile methodologies. Understanding of cloud-native design principles. Other Details: Start: ASAP Duration: 7-9 months Work load: Full time Location: Aarhus, with some flexibility Language: Danish and English

🏢 Summary: Senior Backend Developer role within a business-critical banking initiative, focused on building and modernizing backend services and batch/ETL solutions in a highly regulated environment. The position involves developing scalable Java/Spring-based applications, integrations, and data processing flows in a SAFe agile setup. It requires on-site work in Stockholm with potential extension beyond the initial contract period. 🗂️ Requirements: 8–10+ years of professional backend development experience, Strong hands-on experience with Java and Spring Boot, Experience with JPA and service-oriented architecture, Strong experience with Kafka and REST APIs, Experience with Microsoft SQL Server (MSSQL), Experience working in Linux environments, Experience with CI/CD tools (Bitbucket, Jenkins, Artifactory), Knowledge of Kubernetes, Experience with authentication/security frameworks (JWT), Strong experience with Spring Batch (mandatory for batch-focused role), Experience with Apache Camel and stored procedures, Experience with integrations across APIs, messaging platforms, and legacy systems 📃 Skills: Java, Spring, SpringBoot, SpringBatch, JPA, Kafka, REST, MSSQL, SQL, Linux, Kubernetes, Bitbucket, Jenkins, Artifactory, JWT, ApacheCamel, Vert.x, Lucene, Memcache, Caffeine, .NET, Splunk, AppDynamics, Sysdig, Grafana 🏢 Description: emagine are looking for three Senior Backend Developers to join a business-critical development initiative in a complex and highly regulated environment for our client within the banking industry. Start: 2026-06-08 End: 2026-11-30 (extension could be possible) Location: Stockholm, min 3 days/week at the office We are seeking experienced and proactive developers with 8–10+ years of professional experience , who can quickly become productive after onboarding and work both independently and collaboratively within a SAFe-based agile setup . Two of the consultant roles will have a strong focus on backend development with Java, Spring Boot, and databases , while the third role will focus more heavily on batch processing and ETL flows , where Spring Batch is a key requirement. Key Responsibilities Design, develop, and maintain backend applications and integrations Build and optimize scalable services using Java and Spring Boot Develop and maintain batch and ETL processes Work with integrations across APIs, messaging platforms, and legacy systems Support modernization initiatives and migration towards new technical platforms Collaborate with cross-functional teams in a SAFe environment Ensure high standards within security, performance, and maintainability Required Competence Backend Development Strong hands-on experience in Java and Spring Boot Experience with JPA and service-oriented architecture Experience with Kafka and REST APIs Knowledge of Vert.x, Lucene, Memcache, Caffeine , or .NET is considered an advantage ETL / Batch Processing Strong experience with Spring Batch (mandatory for one of the roles) Experience with Apache Camel and stored procedures Databases Solid experience with Microsoft SQL Server (MSSQL) Platform & Runtime Experience working in Linux environments Knowledge of Kubernetes and platform modernization initiatives CI/CD & DevOps Experience with Bitbucket, Jenkins, and Artifactory Security & Monitoring Experience with authentication/security frameworks such as JWT Familiarity with audit logging and monitoring tools such as Splunk, AppDynamics, Sysdig, and Grafana Integrations Strong experience with Kafka and REST-based integrations Experience working with mainframe integrations , file-based integrations, and legacy adapters is highly valued Consultant Profile We are looking for outgoing, senior consultants who are comfortable taking ownership and working with minimal supervision after the initial introduction period. The ideal candidate is technically strong, communicative, and thrives in both independent work and collaborative agile team environments.

🏢 Summary: Long-term project for a Senior/Expert .NET Developer focused on backend and API development within enterprise banking systems. The role involves developing and optimizing software solutions, working with legacy code, and providing technical leadership and mentorship. The position emphasizes high-quality standards, collaboration, and code excellence in a complex financial environment. 🗂️ Requirements: Strong knowledge of C#, Strong knowledge of .NET framework, Expertise in ASP.NET Core, Experience in API development, Experience with SQL Server design and development, Ability to analyze and troubleshoot legacy code, Solid understanding of OOP principles, Knowledge of software engineering best practices 📃 Skills: C#, .NET, ASP.NET, SQL, T-SQL, Git, Jenkins, Angular, HTML, CSS, JavaScript, Visual Studio, Postman, Swagger, Bitbucket, Bootstrap, SQL Server 🏢 Description: We’re looking for an Expert/Senior .NET Developer to join a long-term project for a leading client in the banking industry. Project Type: Enterprise banking systems – backend & API development, code optimization, and mentorship Responsibilities: Design, develop, and maintain software solutions Analyze, refactor, and troubleshoot legacy code Conduct code reviews and uphold high-quality standards Collaborate with QA and Business Analysts Mentor junior developers and provide technical leadership Must-Have Experience: Strong knowledge of C# and the .NET framework Expertise in ASP.NET Core and API development Experience with SQL Server (design & development) Ability to work with and troubleshoot legacy code Solid understanding of OOP and software engineering best practices Nice-to-Have: Familiarity with Git, Jenkins, and testing frameworks Understanding of cloud concepts & web security best practices Knowledge of frontend technologies (Angular, HTML, CSS, JavaScript) Tools & Tech Stack:Visual Studio, Postman, Swagger, Bitbucket, SQL Server Management Studio, T-SQL, Bootstrap (or similar)

🏢 Summary: Fullstack .NET Developer role for a Nordic banking client, focused on developing and maintaining C#/.NET APIs and modern Angular-based SPAs in a cloud-native environment. The position involves working with OpenShift, containers, and CI/CD pipelines in an agile setup, with a hybrid work model in Stockholm. The assignment runs from June 2026 to June 2027. 🗂️ Requirements: Extensive experience with C# and .NET / .NET Framework (8–10), Experience developing C# .NET SPAs running on OpenShift, Experience building C# .NET APIs, including composite APIs, Strong experience with modern Angular (not AngularJS), Solid knowledge of JavaScript and TypeScript, Experience in both backend and frontend development, Hands-on experience with Docker, Kubernetes, OpenShift, Experience with GitHub and GitHub Actions, Experience with CI/CD pipelines, Experience working in agile development environments, Understanding of modern software engineering principles 📃 Skills: C#, .NET, Angular, JavaScript, TypeScript, Docker, Kubernetes, OpenShift, GitHub, GitHubActions, CI/CD, SPA, API 🏢 Description: emagine is looking for a Fullstack .NET Developer to one of our nordic banking clients. Start: 2026-06-17 End: 2027-06-30 Location: Stockholm (3 days onsite, 2 days remote) Required Skills & Experience Extensive experience in C# and .NET / .NET Framework (versions 8–10)Developer experience in C# .NET Frontend Single-Page Applications (SPA) running on OpenShift Developer experience in C# .NET APIs, preferably within composite APIs consuming other APIs Strong experience from projects involving changes in both Frontend SPAs and APIs Strong experience with Angular (preferably modern Angular frameworks, not legacy AngularJS) Solid knowledge of JavaScript and TypeScript Experience in both back-end and front-end development Hands-on experience with: Docker Kubernetes OpenShift Experience using: GitHub GitHub Actions CI/CD pipelines Experience working in agile development environment. Strong understanding of modern software engineering principles and best practices Meritorious Experience from development projects within banking or financial services Experience working in regulated or large enterprise environments Experience with scalable API architectures and integrations

🏢 Summary: Senior Backend Engineer role focused on building and scaling a cloud-based SaaS platform using modern .NET services and REST APIs. The position involves designing distributed systems, improving reliability and observability, and working with cloud and container environments. You will contribute to technical decisions and engineering best practices within a collaborative team. 🗂️ Requirements: 5+ years backend development experience, Experience with SaaS and web applications, Strong knowledge of C#, Strong knowledge of modern .NET/.NET Core, Solid computer science fundamentals, Experience with distributed systems design, Experience with cloud platforms, Experience with containers and orchestration, Understanding of concurrency and performance, Knowledge of authentication and authorization mechanisms 📃 Skills: C#, .NET, .NETCore, REST, Azure, AWS, GCP, Kubernetes, Kafka, RabbitMQ, SQS, Docker, SQL, HTML, CSS, JavaScript 🏢 Description: We’re hiring a Senior Backend Engineer to help build and scale a cloud-based SaaS platform. You’ll work on modern .NET services and APIs, improve reliability and observability, and contribute to technical decisions as part of a collaborative engineering team. Responsibilities: Build and maintain backend services and REST APIs in C# / .NET (.NET Core). Design scalable solutions for distributed systems (async workflows, messaging, integrations). Work with cloud services (Azure/AWS/GCP) and container environments (e.g. Kubernetes). Strengthen system reliability with logging, metrics, tracing, and monitoring. Support secure access patterns: authentication/authorization, API gateway concepts. Contribute through code reviews, good engineering practices, and automation. Requirements: 5+ years of backend development experience, including SaaS and web applications. Strong knowledge of C# and modern .NET + solid CS fundamentals. Familiarity with containers/orchestration and cloud-native approaches. Experience with some of: Kafka/RabbitMQ/SQS, workflow orchestration, job scheduling, search. Good understanding of concurrency and performance. Strong communication skills; Agile/Scrum is a plus. Bonus: basic front-end knowledge (HTML/CSS/JS).

🏢 Summary: The offer is for a Senior .NET Developer responsible for improving and refactoring core backend systems to enhance structure, maintainability, and security. The role focuses on reducing technical debt, enabling automation and AI integration, and ensuring high code quality through testing and CI/CD practices. The position involves hands-on development within legacy or monolithic environments and driving system modernization. 🗂️ Requirements: 5+ years experience in .NET / C# backend development, Experience with legacy or monolithic systems, Strong knowledge of clean code principles, Proven experience in refactoring existing codebases, Strong SQL and backend integration experience, Experience with APIs and service-based architecture, Experience with CI/CD pipelines, Experience with automated testing, Familiarity with TDD or BDD practices, Experience with Gherkin, SpecFlow, Cucumber or similar, Experience using AI tools in development workflows, Understanding of code structuring for automation and AI integration 📃 Skills: .NET, C#, SQL, APIs, CI/CD, TDD, BDD, Gherkin, SpecFlow, Cucumber, AI, Git, Docker, .NETCore 🏢 Description: Introduction & Summary: We are seeking a Senior .NET Developer with 5-8+ years of experience in backend development and .NET engineering. The successful candidate will drive improvement in code quality, reduce technical debt, and support system structuring for better predictability. With a focus on future automation and AI capabilities, you will help ensure code understandability, maintainability, and security. Main Responsibilities: Responsible for hands-on development and refactoring of core systems, with the aim of enhancing their structure and predictability. Develop and improve .NET-based systems. Reduce technical debt and increase maintainability. Support safe and efficient delivery. Ensure code is understandable, maintainable, and secure. Make systems testable and observable. Facilitate automation of workflows. Key Requirements: Strong experience with .NET / C#. Experience working with legacy or monolithic systems. Strong understanding of clean code principles. Experience with refactoring and improving existing codebases. Strong SQL and backend integration experience. Experience with APIs and service-based architecture. Experience with CI/CD pipelines. Experience with automated testing. Familiarity with TDD / BDD and security by design thinking. Experience with Gherkin / SpecFlow / Cucumber or similar. AI-related: Experience using AI tools in development workflows. Understanding of code structuring for automation and AI integration. Experience using AI for debugging, testing, or documentation support. Nice to Have: Experience with .NET Core. Experience with containerization. Exposure to AI-assisted testing or development tools. Experience improving system observability.

🏢 Summary: Senior backend developer role focused on designing and developing scalable backend services using Quarkus or Spring Boot. The position involves database and transaction management, maintaining code quality through testing and reviews, and optimizing production performance. Candidates should have strong Java expertise and experience operating backend systems. 🗂️ Requirements: Strong knowledge of Java fundamentals, Experience with Quarkus or Spring Boot, Experience designing and operating backend services, Understanding of databases and transaction management, Ability to perform testing and code reviews, English proficiency at B2 level or higher 📃 Skills: Java, Quarkus, Spring, SQL, Testing, Git 🏢 Description: Summary: emagine is currently hiring experienced senior developers who possess the necessary technical skill set to design and develop efficient backend services. Responsibilities: Designing and developing scalable backend services using Quarkus or Spring Boot. Implementing solid database management and transaction handling. Ensuring high code quality through rigorous testing, code reviews, and adherence to Clean Code principles. Optimizing the performance and troubleshooting issues in production environments. Must Haves: Strong knowledge of Java fundamentals (collections, classes, interfaces, enums, inheritance, exception handling). Experience in designing, developing, and operating backend services using Quarkus or Spring Boot. Solid understanding of databases and transaction management. Ability to ensure code quality through testing and code reviews. Proficient in English (minimum B2 level). Nice to Haves: Experience with performance optimization techniques. Familiarity with Clean Code principles.

🏢 Summary: Senior Backend Developer (remote, 12-month contract) focused on building scalable data processing systems and robust data pipelines. The role involves designing system architecture, coding for scale, and collaborating across teams while experimenting with new technologies and MVPs. 🗂️ Requirements: BSc in Software Engineering, Computer Science or related field, 5+ years of experience with Python, Hands-on experience with data pipelines, Experience designing scalable system architectures, Experience in backend software development 📃 Skills: Python, AWS, CI/CD, DevOps, SQL, ElasticSearch, OpenSearch, Neptune, Neo4j 🏢 Description: Start: ASAP Work model: Remote Length of contract: 12 months + extensions We’re looking for a Senior Backend Developer with a data pipeline emphasis with a strong understanding of and hands-on experience with broad software development, i.e., system architecture, coding for scale, and communicating possibilities for what can be built and maintained, as well as a love for experimenting and building MVPs. Core Responsibilities: Design and implement software architectures for scalable data processing systems. Develop and maintain data pipelines for efficient data ingestion and processing. Collaborate with cross-functional teams to define and streamline software development processes. Participate in code reviews and maintain high software quality standards. Experiment with new technologies and frameworks to enhance system performance. Key Requirements: BSc in Software Engineering, Computer Science, or other relevant field 5+ years of experience with Python Experience with data pipelines Nice to Have: Experience with one or more AWS services AWS DevOps CI/CD Pipelines Relational databases ElasticSearch/OpenSearch Graph databases (e.g., Neptune or Neo4j)