WinDev Senior Developer

🏢 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 .NET/WPF Developer role focused on designing, developing, and maintaining advanced desktop applications in a hybrid work model. The position involves working with modern .NET technologies, reporting tools, and MS SQL Server, while collaborating with database teams and participating in client interactions. 🗂️ Requirements: 8+ years of experience with .NET technology stack, Strong expertise in WPF, .NET Framework 4.6+ proficiency, Strong knowledge of C#.NET, Experience with Unity Framework, Experience with Entity Framework 6, Experience with MS SQL Server, Experience with reporting tools: Crystal Reports, RDLC, Aspose, Excel, Proficiency with Visual Studio 2015/2017 Professional, Experience with SSDT, Fluent Polish and English, Availability for hybrid work (2–3 days onsite) 📃 Skills: WPF, .NET, C#, Unity, EntityFramework, MSSQL, CrystalReports, RDLC, Aspose, Excel, VisualStudio, SSDT 🏢 Description: Location: Łódź or Warsaw, Poland. Hybrid 2/3 days per week. Language Requirements: English & Polish About the Role: We are looking for an experienced Senior .NET/WPF Developer to join the team. This role involves developing and maintaining advanced desktop applications and contributing to high-quality software solutions. Key Responsibilities: Design, develop, and maintain desktop applications using WPF , .NET Framework 4.6+ , C#.NET , and Unity Framework . Work with Entity Framework 6 for database interactions. Develop, customize, and maintain reports using Crystal Reports , RDLC , Aspose , and MS Excel . Collaborate with database teams using MS SQL Server . Use Visual Studio 2015/2017 Professional and SSDT for development and database management. Participate in client interactions Requirements: 8+ years of experience with the technology stack listed above. Strong expertise in WPF, .NET Framework 4.6+, C#.NET, Unity Framework, Entity Framework 6 . Solid experience with MS SQL Server and reporting tools ( Crystal Reports, RDLC, Aspose, Excel ). Proficient with Visual Studio 2015/2017 Professional and SSDT . Fluent in Polish and English (both written and spoken). Ability to work 2–3 days per week onsite , and full-time during client visits (1 week) as required.

🏢 Summary: Senior Frontend Developer role focused on building, maintaining, and optimizing scalable web applications using modern frontend technologies. The position involves designing web architecture, integrating APIs, and supporting CI/CD processes to deliver high-performance user experiences. The role requires strong experience in React-based ecosystems and modern DevOps practices. 🗂️ Requirements: Minimum 5 years of experience in modern frontend technologies, Strong experience with ReactJS and NextJS, Proficiency in HTML, CSS, TypeScript, and JavaScript, Experience designing scalable web architecture, Solid knowledge of REST APIs, Experience with NodeJS and package managers, Experience with CI/CD pipelines and GitHub workflows, Proficient in Git version control, Experience creating technical documentation (e.g., Confluence), English proficiency at B2 level or higher 📃 Skills: ReactJS, NextJS, HTML, CSS, TypeScript, JavaScript, REST, NodeJS, CI/CD, GitHub, Git, Confluence, Azure, GraphQL, HeadlessCMS 🏢 Description: We are seeking a highly skilled and motivated Senior Frontend Developer to join our team. The ideal candidate will have a strong background in front-end coding, troubleshooting, and optimizing web applications. You will play a key role in developing and maintaining high-quality, scalable, and performant web solutions using modern technologies. This position requires a proactive individual with excellent problem-solving skills and a passion for delivering exceptional user experiences. Must-Have Qualifications to be successful for the role: Technical Skills: Develop and maintain web applications using ReactJS / NextJS . Implement responsive designs using HTML, CSS, Typescript, and JavaScript . Create and maintain technical documentation using tools like Confluence. Design and implement scalable web architecture and artifacts. Solid knowledge of REST APIs . Experience with NodeJS and package managers. Utilize DevOps skills, including CI/CD pipelines , GitHub workflows , and actions . Manage version control using GIT effectively. Soft Skills: Strong problem-solving and troubleshooting abilities. Excellent communication and collaboration skills to work effectively in a team environment. Attention to detail and a proactive approach to identifying and resolving issues. Ability to adapt to new technologies and learn quickly. Experience: Minimum 5 years of experience in modern Frontend technologies. English proficiency should be at least B2 level. Nice-to-Have Qualifications: Experience with Azure or other cloud platforms. Experience with GraphQL. Experience with Headless CMS (Content Management System) . Optimize web performance, focusing on Core Web Vitals. Other Details: Work model: 2 days per week in the office and 3 days at home. We offer a flexible work schedule that includes 12 additional Compensation Days besides regular holidays. Note that specific work hours may vary between winter and summer schedules, and the candidate will be required to submit their CV in English.

🏢 Summary: Senior Java Developer role focused on building and maintaining Java-based cloud applications, integrating APIs and microservices, and ensuring application performance and code quality in an Agile environment. The position involves collaboration with multidisciplinary teams and participation in code reviews using modern Java and cloud technologies. 🗂️ Requirements: Proven experience in Java development, Experience with AWS cloud services, Knowledge of Agile development practices, Experience with API integration, Experience with microservices, Ability to perform testing and ensure code quality, Ability to identify and resolve performance issues 📃 Skills: Java, AWS, Agile, API, Microservices, Spring, Hibernate, DevOps 🏢 Description: We are looking for a Senior Java Developer with solid experience in Java and Cloud. The ideal candidate should have exceptional skills in developing and implementing solutions using the latest technologies. Main Responsibilities: - Develop and maintain Java-based applications in cloud environments. - Collaborate with multidisciplinary teams to design and implement robust solutions. - Perform testing and ensure code quality. - Participate in code reviews and provide constructive feedback. - Identify and resolve application performance issues. Key Requirements: - Proven experience in Java development. - Familiarity with cloud services (AWS). - Knowledge of Agile development practices. - Skills in API integration and microservices. - Ability to solve problems effectively. Desirable: - Experience with DevOps tools. - Familiarity with Java frameworks such as Spring or Hibernate. - Relevant certifications in Java or Cloud.

🏢 Summary: The offer is for a Senior Java Developer to design, develop, and maintain Java-based applications in AWS cloud environments. The role involves building microservices, integrating APIs, ensuring code quality, and resolving performance issues within Agile teams. It focuses on delivering robust, scalable cloud-native solutions using modern Java technologies. 🗂️ Requirements: Proven experience in Java development, Experience with AWS cloud services, Experience developing microservices, Experience with API integration, Knowledge of Agile methodologies, Experience with code testing and code reviews, Ability to troubleshoot and resolve performance issues 📃 Skills: Java, AWS, Spring, Hibernate, Microservices, API, Agile, DevOps 🏢 Description: We are looking for a Senior Java Developer with solid experience in Java and Cloud. The ideal candidate should have exceptional skills in developing and implementing solutions using the latest technologies. Main Responsibilities: Develop and maintain Java-based applications in cloud environments. Collaborate with multidisciplinary teams to design and implement robust solutions. Perform testing and ensure code quality. Participate in code reviews and provide constructive feedback. Identify and resolve application performance issues. Key Requirements: Proven experience in Java development. Familiarity with cloud services (AWS). Knowledge of Agile development practices. Skills in API integration and microservices. Ability to solve problems effectively. Desirable: Experience with DevOps tools. Familiarity with Java frameworks such as Spring or Hibernate. Relevant certifications in Java or Cloud.

🏢 Summary: Senior .NET WPF Developer role focused on building and enhancing a Windows 11 desktop application for healthcare-related devices in the medical technology domain. The position involves developing safety-critical software solutions, implementing new features, testing, and supporting regulatory documentation and certification processes. The role is suited for experienced .NET and WPF developers working in a quality- and compliance-driven environment. 🗂️ Requirements: 5+ years of commercial experience with .NET and C#, Strong WPF desktop application development experience, Practical experience with MVVM, Experience with Git, Experience with software development lifecycle tools, English proficiency for international communication, Residency in Poland 📃 Skills: .NET, C#, WPF, MVVM, Git, Windows, SDLC 🏢 Description: We are looking for a Senior .NET WPF Developer to join a team delivering a project in the medical technology domain focused on developing advanced software solutions for healthcare-related devices. In this role, you will contribute to the development of a Windows 11 desktop application and play a key part in building and enhancing core product functionalities. The project involves working on solutions with high-quality, safety, and compliance requirements, making it an excellent opportunity for professionals who want to apply their .NET and WPF expertise to a product that has a real impact on the quality and safety of technologies used in medical environments. Your tasks Developing and maintaining a desktop application built with .NET, C#, and WPF for the Windows 11 platform Designing and implementing new features in line with business requirements and quality standards applicable to safety-critical solutions Creating and configuring customized Windows 11 system images to support application deployment and operation Preparing, executing, and analyzing functional and technical tests to ensure the highest quality of the solution Collaborating on technical and regulatory documentation required for product certification processes Requirements At least 5 years of commercial experience in software development using .NET and C# Strong expertise in WPF and desktop application development Practical experience with the MVVM architectural pattern Experience working with version control systems (Git) and software development lifecycle tools Good command of English, enabling effective communication in an international environment Residency in Poland Nice-to-have requirements Knowledge of regulatory requirements within the medical industry or other highly regulated sectors Experience supporting product certification processes or preparing compliance-related documentation

🏢 Summary: Senior Software Engineer responsible for defining technical standards and architecture, leading backend and frontend development, and ensuring secure, scalable, and observable solutions. The role drives CI/CD, enterprise integrations, and production support while aligning engineering practices with product and operations goals. 🗂️ Requirements: Proven experience defining technical standards and architecture, Experience with CI/CD orchestration, Experience with observability implementation, Experience implementing on-premises, hybrid, and cloud solutions, Experience leading backend and frontend architectural decisions, Experience maintaining CI/CD pipelines, Experience coordinating enterprise integrations, Knowledge of DDD and clean architecture, Expertise in Java and Spring Boot, Expertise in Python and FastAPI, Expertise in React or Angular, Experience with L2/L3 production support, Experience with Spring Security and OAuth 📃 Skills: Java, SpringBoot, Python, FastAPI, React, Angular, CICD, Observability, ServiceNow, Jira, Boomi, DDD, OAuth, SpringSecurity 🏢 Description: To strengthen the team, we are seeking a person for the role of Senior Software Engineer, responsible for defining technical standards and architecture, guiding the development team, ensuring quality practices, security, and CI/CD, and collaborating with product and operations in delivering scalable, business-aligned solutions. Main Responsibilities Define technical standards, architecture, and development practices, ensuring quality, security, performance, and resilience in production environments. Orchestrate end-to-end delivery with CI/CD and observability while promoting responsible autonomy among teams aligned with product and operational objectives. Implement on-premises, hybrid, and cloud solutions with security best practices, observability, and integration with existing systems. Lead architectural decisions in backend and frontend (Java/Spring Boot, Python/FastAPI, React/Angular), ensuring scalability, consistent testing and code reviews. Implement and maintain end-to-end CI/CD pipelines and observability (logs, metrics, distributed tracing). Coordinate enterprise integrations (ServiceNow, Jira, CRMs) and iPaaS (e.g., Boomi), including mapping, validation, and compliance. Apply practices such as DDD, clean architecture, application security, and secrets/IAM management throughout the development lifecycle. Provide technical guidance to the team, elevate quality standards, and align practices with product and operations. Lead L2/L3 support in production: incident triage and resolution, prevention escalation (on call), SLA management, and conducting post-mortems focused on root causes and corrective actions. Operate and evolve applications in on-premises, hybrid, or cloud environments: VMs, networks, VPNs, certificates, Nginx/reverse proxy, load balancing, and enhancing the security of exposed services. Key Requirements Proven ability to define technical standards, architecture, and development practices. Experience with CI/CD orchestration and observability practices. Knowledge of implementing on-premises, hybrid, and cloud solutions with security best practices. Leadership in architectural decisions for backend and frontend technologies. Experience with maintaining CI/CD pipelines and end-to-end observability. Ability to coordinate enterprise integrations and ensure compliance. Mastery of practices such as DDD and clean architecture. Technical expertise in Java/Spring Boot, Python/FastAPI, React/Angular. Experience in providing L2/L3 technical support and leading incident resolution. Expertise in security practices, including Spring Security and OAuth. Nice to Have Experience with Docker, Kubernetes, and cloud environments (Azure/AWS/GCP). Background in data management with PostgreSQL, MongoDB, and Redis. Familiarity with AI models, particularly RAG. Knowledge in security access management and policies based on the principle of least privilege.

🏢 Summary: Senior Developer role focused on designing and implementing business-logic layer solutions for insurance systems in a microservices architecture integrated with a monolith. The position involves developing and maintaining policy and billing modules, ensuring high performance, scalability, and code quality in an agile environment. Hybrid work model with strong emphasis on backend architecture and system optimization. 🗂️ Requirements: Very good knowledge of insurance platform (policy or billing modules), Minimum 4 years experience with dedicated platform language, Minimum 5 years experience in Java/JEE, Experience with backend frameworks, Knowledge of relational databases (Oracle), Very good knowledge of SQL (min. 5 years), Experience with Git and Maven, Knowledge of OOP, functional and multithreaded programming, Experience with Docker, Kubernetes, Helm, Knowledge of event-driven architecture and REST, Experience with Kafka and Elasticsearch, Ability to scale applications, Experience in performance analysis and query optimization, Experience with Linux systems, Knowledge of application servers, Experience with CI/CD tools, Knowledge of DDD, TDD, BDD, Experience with microservices architecture 📃 Skills: Java, JEE, Spring, Hibernate, Oracle, SQL, Git, Maven, Docker, Kubernetes, Helm, Kafka, Elasticsearch, Linux, REST, DDD, TDD, BDD 🏢 Description: Senior Developer przy rozwoju systemów w modelu biznesowo-logicznej warstwy aplikacji. Tryb pracy: Hybrydowy (1 dzień w tygodniu z biura, 4 dni zdalnie) Zakres obowiązków: Projektowanie i implementacja rozwiązań w zespole pracującym w metodykach zwinnych Rozwój oraz utrzymanie systemów wspierających ubezpieczenia majątkowe (obsługa polis i rozliczeń) Współtworzenie zmian w istniejących systemach oraz rozwój nowych funkcjonalności Rozwijanie architektury mikrousługowej współpracującej z systemem monolitycznym Współudział w opracowywaniu koncepcji rozwiązań dla inicjatyw biznesowych Projektowanie i wdrażanie architektury nowych rozwiązań Zapewnienie wysokiej jakości oprogramowania oraz zgodności ze standardami Wsparcie stabilizacji i utrzymania wdrożonych rozwiązań Utrzymywanie oraz aktualizacja dokumentacji technicznej Wymagania obowiązkowe: Bardzo dobra znajomość platformy do obsługi systemów ubezpieczeniowych (moduły polis lub rozliczeń) Doświadczenie w pracy z dedykowanym językiem platformy (min. 4 lata) Min. 5 lat doświadczenia w programowaniu w Java / JEE Znajomość frameworków backendowych (np. Spring, Hibernate) Znajomość relacyjnych baz danych (w szczególności Oracle) Bardzo dobra znajomość SQL (min. 5 lat) Znajomość narzędzi do zarządzania kodem i budowania aplikacji (np. git, maven) Znajomość programowania obiektowego, funkcyjnego oraz wielowątkowego Doświadczenie w pracy z konteneryzacją i orkiestracją (Docker, Kubernetes, helm) Znajomość architektury opartej o zdarzenia oraz komunikacji REST Znajomość narzędzi do przetwarzania i wyszukiwania danych (np. Kafka, ElasticSearch) Umiejętność skalowania aplikacji Doświadczenie w analizie wydajności oraz optymalizacji zapytań i przechowywania danych Doświadczenie w pracy z systemami Linux Znajomość serwerów aplikacyjnych Doświadczenie z narzędziami CI/CD Znajomość koncepcji projektowych (DDD, TDD, BDD) oraz architektury mikrousługowej Mile widziane: Doświadczenie w wykorzystaniu narzędzi wspieranych sztuczną inteligencją w pracy programisty Wiedza z zakresu bezpieczeństwa IT Doświadczenie w samodzielnym projektowaniu domeny biznesowej Certyfikaty związane z wykorzystywaną platformą Znajomość TypeScript Doświadczenie w pracy z chmurą publiczną (Azure, GCP, AWS)

🏢 Summary: Senior .NET Developer role focused on building and enhancing a custom industrial application supporting end-to-end production and logistics processes. The position involves backend development in .NET, frontend development with Angular, and designing microservices-based solutions deployed in AWS. The project emphasizes scalability, traceability, and continuous product improvement. 🗂️ Requirements: Minimum 5 years of commercial experience as a .NET Developer, Strong hands-on experience with .NET in backend development, Practical experience with Angular in frontend development, Experience with microservices-based architecture, Experience with AWS cloud services 📃 Skills: .NET, Angular, AWS, Microservices 🏢 Description: We are looking for a Senior .NET Developer to join a long‑term product development project in the industrial and manufacturing domain. The role focuses on building and maintaining a custom‑built application that supports end‑to‑end production and logistics processes for industrial clients. The project uses modern technologies and follows an innovation‑driven approach, with strong emphasis on process traceability, scalability, and continuous improvement. Your tasks Develop and maintain backend solutions using .NET for a custom industrial application Implement new product functionalities according to business and process requirements Build and extend frontend features using Angular Design and develop solutions based on a microservices architecture Develop, deploy, and maintain solutions in an AWS cloud environment Requirements Minimum 5 years of commercial experience as a .NET Developer Strong hands‑on experience with .NET in backend development Practical experience with Angular in frontend development Experience working with microservices‑based architectures Experience working with AWS cloud services Fluency in English Residing in Poland required

🏢 Summary: 6-month contract role for a Senior Java Developer with 6–8 years of experience, focused on designing, developing, and maintaining scalable enterprise-level APIs and application systems. The position involves full SDLC participation, technical leadership, and collaboration in an Agile environment to deliver high-performance solutions. 🗂️ Requirements: 6-8 years experience in Java development, Strong knowledge of Core Java 1.8, Experience with J2EE, Experience with Spring framework, Experience with Hibernate, Experience with MySQL, Experience designing and developing RESTful APIs, Strong knowledge of SQL and relational databases, Experience with Maven or Gradle, Experience writing unit tests using JUnit and Mockito, Experience working in Agile environment, Ability to lead development cycle and conduct code reviews 📃 Skills: Java, J2EE, Spring, Hibernate, MySQL, PostgreSQL, SQL, REST, Maven, Gradle, JUnit, Mockito, Agile 🏢 Description: Designation: Senior Java Developer Years of Experience: 6 to 8  years Contract Duration: 6 Months Work Mode / Shift Timing: Normal Shift (9:00 AM – 6:00 PM) Senior Java Developer Skillset: Proven experience of at least 6-8 years in Java-based programming. Strong knowledge of Core Java (1.8), J2EE, Spring, Hibernate, and MySQL. Familiarity with RESTful API design and development. Solid understanding of relational databases (e.g., PostgreSQL, MySQL) and SQL. Familiarity with build tools such as Maven and Gradle. Excellent analytical and problem-solving skills. Strong experience in writing unit tests using JUnit and Mockito Responsibilities: Responsible for understanding the software requirements and developing it into a working source code accordingly. The overall objective of this role is to contribute to applications systems analysis and programming activities. Successful candidates will be strong developers who take ownership of his/her applications, demonstrate critical thinking in design, communicate clearly, and have a consistent track record of delivering and supporting scalable, high performance enterprise-level API. The implementation around enterprise systems require strong critical thinking skills, creative engineering balanced with high quality and customer focus.a The ideal candidate is one that is not only passionate about software development and software architecture but also focus on business needs and customer experience. The day-to-day work is interesting, challenging and fast-paced! Profile Required Work with business stakeholders, project managers, business analysts, and other IT teams to understand the business needs and their requirements. Work with a development team of software engineers and enterprise architects to ensure the solutions meet our business needs using Agile methodologies in a fast-paced environment. Will often require to take a lead role in the entire development cycle, conduct design and code reviews, and have a heavy input throughout the process, from requirements to production deployment. Create technical system specifications and ensure documentation remains current throughout all phases of the SDLC. Raise up opportunities, enhancements, and process improvements. Communicate timely status, including any potential risks/issues of the assignments to management. Research, design, define, develop, test, document and implement new service APIs or changes to existing services. Participate in test planning, development, and execution for integration and system testing. Learn new software tools and skills as needed. Keep up with technologies. Provide mentoring to other development staff on technical topics. Support and maintain applications utilizing required tools and technologies. Ensure applications are scalable and operate efficiently in the production environment. Must be self-motivated and take initiative