C#/.Net Developer

🏢 Summary: Development role focused on building and maintaining C#/.NET components for real-time voice, video, and data communication systems. The position involves working with SIP signaling, network communication, and secure low-latency services within distributed Agile teams. The role is primarily hands-on, contributing to feature development in existing communication platforms. 🗂️ Requirements: 3+ years of experience with C# and .NET (Framework and Core), Strong experience in asynchronous programming, Strong experience in network programming, Hands-on experience with ASP.NET, Hands-on experience with WebAPI, Hands-on experience with SignalR, Hands-on experience with WCF, Experience with Telecom or radio interfaces (3GPP), Solid understanding of SIP protocols, Exposure to RTP and RTCP, Experience with real-time voice and video systems, Experience working with XML (XSD) and structured data formats, Understanding of OOP and SOLID principles, Experience with CI/CD, Experience with Git, Experience working in Agile environments, Basic knowledge of SQL databases 📃 Skills: C#, .NET, ASP.NET, WebAPI, SignalR, WCF, SIP, RTP, RTCP, 3GPP, XML, XSD, SQL, Git, CI/CD, OOP, SOLID, Agile 🏢 Description: Responsibilities Develop and maintain C#/.NET components for real-time voice, video, and data Implement new features within existing communication services Work with SIP signalling, session handling, and network communication Build secure, low-latency, highly reliable services Collaborate with distributed Agile teams 60–70% hands-on development Requirements 3+ years of experience with C# / .NET (Framework and Core) Strong experience in asynchronous and network programming Hands-on experience with ASP.NET , WebAPI, SignalR , and WCF Experience with Telecom / radio interfaces (3GPP) Solid understanding of SIP protocols; exposure to RTP / RTCP Experience with real-time voice/video systems Experience working with XML (XSD) and structured data formats Good engineering fundamentals: OOP, SOLID, CI/CD, Git, Agile Basic SQL database knowledge Nice to have Experience with Atos or Mitel solutions ASP.NET web application experience

🏢 Summary: The role involves designing, developing, and maintaining .NET applications and services with a strong focus on code quality and system reliability. The position includes writing automated tests, participating in architectural discussions, and collaborating with QA and DevOps teams. It is suited for an experienced .NET Developer comfortable working with production systems and modern development practices. 🗂️ Requirements: Commercial experience as .NET Developer, Strong knowledge of C#, Strong knowledge of .NET Framework or .NET 6+, Experience with SQL databases, Understanding of software architecture, Knowledge of data modeling, Experience maintaining production systems, English proficiency B2 or higher 📃 Skills: C#, .NET, SQL, REST, Selenium, Gherkin, Jenkins, HTTPS, LDAP, SSH, SFTP, TLS, Architecture, DataModeling, UnitTesting, IntegrationTesting 🏢 Description: Responsibilities: Designing, developing, and maintaining .NET applications and services Write and maintain automated unit and integration tests Participate in code reviews and architectural discussions Collaborate with QA, DevOps, and product teams Requirements: Commercial experience as a .NET Developer Strong knowledge of C#, .NET Framework and/or .NET 6+ Experience working with SQL databases Understanding of software architecture designs and data modeling Experience maintaining production systems Communicative English (B2) Nice to have: Experience creating technical documentation Experience with REST API, Selenium, Gherkin, Jenkins, HTTPS, LDAP, SSH, SFTP, TLS What we offer: Flexible forms of employment and working hours (CoE or B2B) An interesting, challenging job in the dynamically developing Capital Group company; Work on innovative projects using modern technologies; Direct impact on shaping the image of the Capital Group's companies on the market; Possibility to develop competences in a wide range; Attractive salary; Stability of employment and a friendly work atmosphere; Cool benefits, among others integration meetings, internal company competitions, fruit Tuesdays, sweet Thursdays and much more;

🏢 Summary: The role involves developing and maintaining scalable full-stack web applications using .NET and modern frontend frameworks. You will design robust Web APIs, optimize databases, and implement clean, testable code within CI/CD-driven environments. The position requires active participation in the full software development lifecycle for international projects. 🗂️ Requirements: Minimum 3 years commercial experience with .NET (C#, Web API, Entity Framework), Proficiency in Angular or React, Strong knowledge of JavaScript, HTML, CSS, Experience with SQL Server or PostgreSQL, Understanding of Unit Testing, Experience with Git, Experience with CI/CD pipelines, Knowledge of design patterns, Knowledge of software development best practices, Fluent English (min. B2), Availability for hybrid work mode 📃 Skills: .NET, C#, WebAPI, EntityFramework, Angular, React, JavaScript, HTML, CSS, SQL, SQLServer, PostgreSQL, UnitTesting, Git, CI/CD 🏢 Description: As a member of our development team, you will be responsible for building scalable web applications, designing robust APIs, and creating intuitive user interfaces. We value clean code, analytical thinking, and a proactive approach to technology. Our expectations: Minimum 3 years of commercial experience in .NET (C#, Web API, Entity Framework). Proficiency in Angular or React, along with JavaScript, HTML, CSS, and modern frontend libraries. Strong experience with relational databases such as SQL Server or PostgreSQL. Solid understanding of Unit Testing, Git, and CI/CD pipelines. Practical knowledge of design patterns and software development best practices. A collaborative mindset and the ability to explain complex technical issues clearly. Strong analytical skills and a "get it done" attitude. Fluent English (min. B2) for smooth collaboration with international partners. Open to work in hybrid mode. Main responsibilities: You will design, develop, and maintain scalable full-stack applications using .NET and modern frontend frameworks (Angular/React) for diverse client projects. You will be responsible for writing clean, testable code and implementing unit tests to ensure the highest software performance and reliability. You will work closely with cross-functional teams to architect robust Web APIs and optimize database schemas while following industry best practices and design patterns. You will actively participate in the full software development life cycle, including CI/CD processes and version control management, to ensure seamless project delivery.

🏢 Summary: Software development role focused on building and maintaining .NET-based solutions, designing scalable architectures, and collaborating with stakeholders in an Agile environment. The position involves end-to-end development, REST API integration, SQL Server database design, code quality practices, and continuous improvement initiatives. 🗂️ Requirements: 3+ years of experience with .NET 4.8+, Experience with .NET Core, Knowledge of Microsoft SQL Server, Experience with relational database design, Advanced SQL skills, Understanding of OOP principles, Knowledge of clean architecture design patterns, Experience building and consuming REST APIs, Proficiency with Visual Studio, Proficiency with VS Code, Experience with GitLab, Understanding of DevOps practices, English proficiency at C1 level 📃 Skills: .NET, .NETCore, SQL, SQLServer, OOP, REST, VisualStudio, VSCode, GitLab, DevOps, eFront, WebSphereTX, Agile, Scrum 🏢 Description: Key Responsibilities End-to-End Development: Design logical data models and build robust software solutions aligned with a well-defined, multi-year product roadmap. Technical Design & Innovation: Proactively propose innovative architectural enhancements through controlled proof-of-concepts (spikes) and ensure all solutions adhere to modern software security standards. Collaboration & Delivery: Work hand-in-hand with business stakeholders to translate functional requirements into efficient technical specs. Participate in workload estimation, planning, and proactive status reporting. Code Quality & Mentorship: Maintain high engineering standards by conducting thorough peer code reviews, ensuring excellent test coverage, and managing application source code configuration. Team & Culture: Foster a friendly, supportive environment focused on continuous learning, knowledge-sharing, and team-wide upskilling. Requirements Technical Expertise: 3+ years of professional experience working with .NET 4.8+ and .NET Core . Strong knowledge of Microsoft SQL Server , relational database design (ER models), and advanced SQL. Solid grasp of Object-Oriented Programming ( OOP ) principles and clean architecture design patterns. Hands-on experience building and consuming REST APIs . Proficiency with development and version control tools ( Visual Studio, VS Code, GitLab ). Soft Skills & Methodology: A proactive, problem-solving mindset with a collaborative, team-player attitude. Foundational understanding of DevOps practices. Fluency in English (minimum C1) , with strong written and verbal communication skills. Nice to Have Direct development or configuration experience with the eFront FIA platform (highly advantageous). Familiarity with WebSphere TX . Prior experience working within an Agile/Scrum framework.

🏢 Summary: The offer is for a Full Stack .NET Developer responsible for building scalable backend services and RESTful APIs within domain-driven and event-driven architectures, as well as developing responsive frontend interfaces. The role involves working with microservices or modular monoliths, implementing asynchronous integrations, and ensuring high code quality through testing and CI/CD practices. The position requires close collaboration in an agile environment and contribution to architectural decisions. 🗂️ Requirements: Minimum 3 years of experience in similar role, Very good knowledge of ASP.NET WebAPI (.NET Core), Very good knowledge of React, Very good knowledge of TypeScript, Experience with Unit Testing, Very good knowledge of Git, Very good knowledge of SQL Server or Azure SQL, Experience with EF Core, Experience with CI/CD pipelines, Experience with containerised deployments, Experience with event-driven architecture, Good command of English 📃 Skills: C#, .NET, ASP.NET, WebAPI, React, TypeScript, SQL, SQLServer, AzureSQL, EFCore, Git, CI/CD, Docker, Microservices, REST, UnitTesting 🏢 Description: Responsibilities: Designing and implementing scalable backend services and RESTful APIs within a domain-driven and event-driven architecture context, including both modular monolith and microservices approaches Building and maintaining responsive frontend interfaces, ensuring seamless integration with backend systems Contributing to architectural decisions and participating in collaborative design sessions to align technical solutions with business requirements Writing and maintaining unit, integration, and end-to-end tests. Ensuring code quality through thorough code reviews and adherence to team standards Working with CI/CD pipelines, containerised deployments, and infrastructure as code Implementing asynchronous communication patterns and event-based integrations between services Configuring and utilising monitoring and observability tools for application diagnostics and performance analysis Collaborating within an agile team, working closely with business analysts to refine requirements, and actively participating in sprint ceremonies Requirements: At least 3 years of experience on a similar position Very good knowledge of ASP.NET WebAPI (.NET Core) Very good knowledge of React, TypeScript Very good knowledge or experience in Unit Testing and GIT Very good knowledge of SQL Server/Azure SQL, EF Core Good command of English Offer: Constant support of dedicated consultant Employee referral program

🏢 Summary: The role involves designing, developing, and maintaining applications on the .NET platform, including building new solutions and optimizing existing systems. It focuses on delivering high-quality, secure, and scalable software aligned with business needs in an international environment. The position requires active participation in architecture design, performance optimization, and continuous integration and deployment processes. 🗂️ Requirements: Minimum 3 years of experience in .NET development, Knowledge of MVC, Knowledge of REST API, Experience in team-based software development, Strong knowledge of MS SQL, Strong knowledge of ElasticSearch, Experience with Continuous Integration tools, Experience with Continuous Delivery approach, Knowledge of unit testing, Knowledge of integration testing, Very good command of English 📃 Skills: .NET, MVC, REST, MS SQL, ElasticSearch, Git, TeamCity, CI, CD, UnitTesting, IntegrationTesting 🏢 Description: Your responsibilities Design, create and maintain applications using the .NET platform and environment Understand requirements and transform them into functional applications in line with business objectives Maintain and upgrade existing applications and fix issues Rewriting/making changes in existing code structure to increase efficiency and performance Ensure error-free code that adheres to best coding practices Test, monitor, and make better solutions through incremental updates/new features/app optimization Identify bottlenecks and address issues to ensure the best performance Create architecture, specifications, and user interfaces of .Net applications Innovate and build high-quality software solutions leveraging the versatility of the .NET platform Implement best practices and methodologies for security, quality, and development approach Our requirements Min. 3 years of experience in working in the .NET environment; Knowledge of MVC, Rest API; Experience in team software development; Good knowledge of MS SQL and ElasticSearch; Using Continuous Integration tools (Git,Team City) and the Continuous Delivery approach; Knowledge of unit and integration tests; Very good command of the English language (work as part of an international team); Optional Knowledge of Umbraco, Angular, AWS This is how we work on a project Clean Code code quality measures code review design patterns static code analysis Continuous Deployment Continuous Integration Development opportunities we offer conferences abroad conferences in Poland development budget external training industry-specific e-learning platforms intracompany training mentoring soft skills training space for experimenting substantive support from technological leaders support of IT events technical knowledge exchange within the company the company supports open source projects time for development of your ideas What we offer Opportunities for constant development and work on exciting projects, Working in an international environment, English lessons, Attractive remuneration in Euro, Flexible working hours, Fully or partially paid training and development. Benefits sharing the costs of sports activities sharing the costs of foreign language classes sharing the costs of professional training & courses remote work opportunities flexible working time integration events corporate gym corporate sports team corporate library no dress code coffee / tea drinks parking space for employees leisure zone sharing the costs of tourist services sharing the costs of tickets to the movies, theater employee referral program charity initiatives family picnics

🏢 Summary: Backend Software Engineer role focused on building, testing, and maintaining C#/.NET-based backend systems and microservices. The position involves designing system architecture, developing REST/GraphQL APIs, and ensuring reliable CI/CD-driven deployments. You will work on scalable systems used across multiple European markets. 🗂️ Requirements: 5+ years of commercial experience in C# development, Strong experience with .NET Core and .NET Framework, Solid knowledge of data structures and algorithms, Strong understanding of software engineering principles and testing, Experience with PostgreSQL, MSSQL, or DynamoDB, Experience designing and implementing REST or GraphQL APIs, Hands-on experience with CI/CD processes, Knowledge of OOP, SOLID principles, and Clean Code, Experience designing software architecture for distributed systems 📃 Skills: C#, .NETCore, .NETFramework, TypeScript, REST, GraphQL, PostgreSQL, MSSQL, DynamoDB, CICD 🏢 Description: About the role You will need to be proficient in C# backend development with a thorough understanding of the .NET technologies involved. Strong backend skills where you can demonstrate your ability to apply these technologies, as well as deploy and maintain them will be crucial to success. Technologies we work with: C#, .NET Core, .NET Framework, TypeScript, JavaScript, Python, Node.js, REST/GraphQL APIs, React, AWS, Terraform Responsibilities Designing, writing, testing functionalities for a backend system written in C# Design software architecture between backend, frontend and mobile apps Deploying and maintaining microservices in AWS using Terraform Debugging and maintaining system on production used by consumers from several European countries Scoping and assessing the complexity of features Participating in sprint planning, daily sprints and meetings with product owners for grooming new features Collaborating with other team members and teams who depend on functionalities that you develop Recruiting and mentoring new team members Required qualifications 5+ years of production software development experience in C# engineer role Solid hands-on experience in .NET Core and .NET Framework technologies Experience in working with AWS and Terraform / CloudFormation Strong knowledge of DBMS like MS SQL / PostgreSQL / DynamoDB Expertise of REST APIs Strong hands-on experience of CI&CD processes Proficiency in OO design patterns, SOLID principles, Clean Code and solving architectural problems Computer Science degree AI Tooling usage Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have Experience in developing Cloud and Infrastructure solutions with AWS and CI/CD processes supported by tools like Docker, Kubernetes, Jenkins, Terraform, CircleCI, GitlabCI, Datadog, etc. Exposure to frontend development in React Working experience with one of the object-oriented and/or functional languages such as Java, TypeScript, Elixir, C++, Golang, Erlang, Python, Kotlin

🏢 Summary: Senior .NET C# engineer role focused on designing and delivering high-quality microservices-based systems using event-driven architecture. The position involves technical leadership, driving architectural decisions, improving engineering standards, and ensuring reliable cloud-native deployments. The role also includes mentoring engineers and establishing best practices for monitoring, testing, and incident response. 🗂️ Requirements: 10+ years experience with C#.NET, 2+ years experience with event-driven architectures, Strong knowledge of microservices architecture, Hands-on experience with Kafka, Experience with NoSQL databases, especially ElasticSearch, Experience deploying cloud applications with Docker and Kubernetes, Ability to design and drive complex technical decisions, Experience diagnosing and fixing complex production issues, Experience writing automated regression tests, Experience working in Agile environment, 3+ years technical leadership and mentoring experience 📃 Skills: C#, .NET, Kafka, ElasticSearch, NoSQL, Microservices, Docker, Kubernetes, SRE, Agile 🏢 Description: Core Responsibilities Writes clean, maintainable code which sets the standard for other engineers in their team using .NET C#, along with other modern tools such as Kafka and ElasticSearch. Delivers high-quality, working software as part of a software development team. Builds a deep, expert understanding of the team’s codebase. Provides comprehensive code reviews with an eye towards bigger-picture concepts. Ensures documentation exists for all critical systems, writing technical guides used widely by engineers. Helps define SRE standards for effective application monitoring and incident response. Drives technical decision-making, identifying trade-offs, risks, and organization-wide alignment. Diagnoses root causes of complex bugs, providing fixes and automated regression tests. Provides direction and vision for technical improvements. Mentors, coaches, and empowers other engineers, sharing knowledge through demonstrations. Key Requirements Expert (10+ years) C#.NET experience and expertise. Understanding of microservice architectures and expert knowledge of patterns and techniques. Significant (2+ years) experience with event-driven architectures and tools like Kafka. Experience using NoSQL databases, especially ElasticSearch. Proven ability to identify best practice improvements and drive change across teams. Ability to tackle complex technical problems independently. Experience driving complex technical decisions involving multiple stakeholders. Ability to pre-empt technical risks and coordinate mitigation efforts. Strong knowledge of deploying cloud applications, including Docker and Kubernetes. Experience working in an Agile environment. Technical leadership experience (3+ years), including mentoring engineers.

🏢 Summary: Development of backend applications using .NET/.NET Core in a banking environment, including building REST APIs, business logic modules, and system integrations. The role involves working in AWS to deploy serverless and containerized services, managing SQL databases, and ensuring security and regulatory compliance. Close collaboration with business teams is required to deliver high-quality, secure financial solutions. 🗂️ Requirements: Minimum 6 years of experience as .NET Developer, Strong knowledge of .NET and C#, Hands-on experience with AWS services (Lambda, ECS/EKS, S3, RDS), Experience with REST API development, Proficiency in Kafka, Proficiency in SQL and database design, Experience with containerization, Experience in banking or financial projects, Understanding of security and regulatory requirements, Very good English skills 📃 Skills: .NET, C#, AWS, Lambda, ECS, EKS, S3, RDS, Kafka, SQL, REST, Docker, Kubernetes 🏢 Description: Scope of Responsibilities: Design and development of backend applications based on .NET / .NET Core. Creation and maintenance of REST APIs, integrations, and business logic modules. Working in an AWS environment – building and deploying serverless services, containerization, and process automation. Working with SQL databases (data model design, query optimization). Collaboration with analysts and business teams within the banking domain. Ensuring code quality, application security, and compliance with financial sector regulatory requirements. Requirements: Minimum 6 years of experience as a .NET Developer. Strong knowledge of .NET / .NET Core (C#). Hands-on experience with AWS (Lambda, ECS/EKS, S3, RDS, or other services). Proficiency in Kafka and SQL. Experience in banking or financial projects (knowledge of regulatory processes, security, and system integrations is a plus). Very good command of English (daily communication).

🏢 Summary: The offer is for a senior developer responsible for developing and maintaining complex banking systems using .NET and related technologies. The role involves backend development, system integrations, database optimization, and working within microservices architecture in an Agile environment. The position requires strong experience with enterprise-level systems and CI/CD practices. 🗂️ Requirements: Minimum 5 years of experience in banking sector, Very good knowledge of .NET Core and .NET Framework, Experience with Transact-SQL and relational databases, Knowledge of MS SQL, Experience with Visual Studio 2022, Experience with SQL Server Management Studio, Knowledge of WebAPI, WCF, Web Services, Experience in object-oriented programming, Experience with Git, Practical experience with microservices architecture, Good knowledge of Spring Boot, Good knowledge of Spring Data JPA, Good knowledge of React (Next.js), Experience with GitLab CI and CI/CD, Experience working in Agile/Scrum, English for technical documentation and communication 📃 Skills: .NET, NETCore, NETFramework, SQL, TSQL, MSSQL, WebAPI, WCF, WebServices, Git, SpringBoot, SpringDataJPA, React, Next.js, Microservices, GitLabCI, CICD, VisualStudio, SSMS 🏢 Description: Twój zakres obowiązków Rozwój i utrzymanie aplikacji w technologii .NET Tworzenie i optymalizacja zapytań SQL oraz praca z bazą danych MS SQL Integracja systemów z wykorzystaniem WebAPI, WCF oraz Web Services Analiza działania oraz rozwój złożonych systemów informatycznych Współpraca z zespołem projektowym w metodykach zwinnych Praca z systemem kontroli wersji Git Tworzenie i utrzymanie dokumentacji technicznej Nasze wymagania Minimum 5 lat doświadczenia zawodowego w branży bankowej Bardzo dobra znajomość .NET Core oraz .NET Framework Doświadczenie w pracy z Transact-SQL oraz relacyjnymi bazami danych Znajomość MS SQL Doświadczenie w pracy z Visual Studio 2022 oraz SQL Server Management Studio Znajomość technologii integracyjnych takich jak WebAPI, WCF, Web Services Doświadczenie w programowaniu obiektowym Znajomość systemu kontroli wersji Git Umiejętność analizy i zrozumienia złożonych systemów IT Znajomość języka angielskiego umożliwiająca pracę z dokumentacją techniczną Doświadczenie w pracy w metodykach Agile Spring Boot – dobra znajomość Spring Data JPA – dobra znajomość React (Next.js) – dobra znajomość Architektura mikroserwisów – znajomość praktyczna (nie tylko teoretyczna) (szukamy osoby z doświadczeniem w microserwisach) GitLab CI – doświadczenie w CICD Doświadczenie w pracy w zespole Agile/Scrum Angielski na poziomie umożliwiającym komunikację i pracę z dokumentacją Mile widziane Doświadczenie w pracy w sektorze finansowym