.NET Developer

🏢 Summary: Senior C# Developer role focused on building and evolving core backend systems for XVA, Liquidity, and Financial Resource Management within a global financial project. The position involves developing scalable, event-driven solutions in a distributed agile team and supporting high-impact financial tools used in fast-moving markets. The role also contributes to migrating legacy systems to a modern event-driven architecture. 🗂️ Requirements: Strong experience with C# and .NET ecosystem, Experience with ASP.NET Web API, Knowledge of event-driven architecture, Experience with asynchronous messaging, Strong understanding of OOP and design patterns, Experience with service-oriented architectures, Strong knowledge of MS SQL, Experience with DevOps tools in enterprise environments, Practical knowledge of LLM and agentic AI engineering, Familiarity with at least two financial domains: Listed/OTC products, PnL, XVA, Liquidity risk, Cash forecasting, Balance sheet metrics 📃 Skills: C#, .NET, ASP.NET, WebAPI, Rebus, SignalR, Windows, MS SQL, Dapper, GIT, Bitbucket, TeamCity, Jenkins, Ansible, OOP, SOA, LLM, AI, XVA 🏢 Description: Are you an experienced C# Developer ready to join a cutting-edge global financial project? We are partnering with a leading international financial institution seeking a Senior C# Developer to join their distributed, agile team focused on building and evolving core systems for XVA, Liquidity, and Financial Resource Management. What you9ll do: Develop and maintain core backend systems using C# .NET, ASP.NET Web API, and event-driven architecture Work with asynchronous messaging (Rebus) to build scalable, reliable solutions Collaborate with an international team committed to clean code and software craftsmanship Influence the migration to a modern event-driven backend architecture Support high-impact financial tools used daily by hundreds of users in fast-moving markets Tech stack: C# .NET, Windows Services, ASP.NET Web API, SignalR MS SQL, Dapper ORM DevOps tools: GIT (Bitbucket), TeamCity, Jenkins, Ansible Event-driven messaging with Rebus What we9re looking for: Strong expertise in OOP, design patterns, and .NET ecosystem Deep understanding of service-oriented architectures and MS SQL Experience with DevOps in enterprise environments Practical knowledge of LLM capabilities and agentic AI engineering within software development Familiarity with financial products and risk management (at least 2 of): Listed/OTC products, PnL explain & risks, XVA models, Liquidity risk, Cash forecasting, or Balance sheet metrics Bonus points: Front-end experience with HTML, JavaScript/TypeScript, React, Redux Personal qualities: Highly autonomous and excels in teamwork Great communication, analytical thinking, and organisational skills Detail-oriented, even under tight deadlines Proactive and flexible in facing daily engineering challenges Motivated to work closely with front-office IT teams Integrity and role-model attitude fostering a positive work culture

🏢 Summary: Offer for an experienced .NET Developer to design, develop and maintain modern banking and financial systems based on microservices architecture and Microsoft Azure cloud. The role focuses on high-quality software development using DDD and CQRS principles in Agile environments. 🗂️ Requirements: 3–4 years of commercial experience as .NET Developer, Very good knowledge of .NET Core, Experience with DDD and CQRS, Practical experience with Entity Framework, Experience with MS SQL Server and T-SQL, Knowledge of Microsoft Azure cloud services, Experience with Apache Kafka or RabbitMQ, Knowledge of design patterns and coding best practices, Experience working in Agile/Scrum, English level B2–C1 📃 Skills: .NET, .NETCore, C#, DDD, CQRS, EntityFramework, MSSQL, T-SQL, Azure, Kafka, RabbitMQ, Microservices, ASP.NET, Oracle, PostgreSQL, Angular, TypeScript, RxJS, CSS, Docker, Kubernetes, Scrum 🏢 Description: O projekcie Poszukujemy doświadczonego .NET Developera do realizacji projektów dla sektora bankowego i finansowego. Osoba na tym stanowisku będzie odpowiedzialna za projektowanie, rozwój oraz utrzymanie nowoczesnych systemów opartych o architekturę mikroserwisową i rozwiązania chmurowe. Jeżeli cenisz wysoką jakość kodu, nowoczesne podejście do tworzenia oprogramowania oraz chcesz pracować przy rozwoju systemów o kluczowym znaczeniu biznesowym – zapraszamy do aplikowania. Twój zakres obowiązków Projektowanie, rozwój i utrzymanie aplikacji opartych o platformę .NET Tworzenie i rozwijanie rozwiązań zgodnych z zasadami DDD oraz CQRS Implementacja i rozwój usług oraz integracji systemowych Projektowanie i optymalizacja baz danych Współpraca z zespołami analitycznymi, testerskimi oraz DevOps Tworzenie dokumentacji technicznej Udział w code review oraz dbanie o wysoką jakość dostarczanego oprogramowania Współpraca w środowisku Agile/Scrum Nasze wymagania Minimum 3–4 lata doświadczenia komercyjnego na stanowisku .NET Developer Bardzo dobra znajomość .NET Core Doświadczenie w projektowaniu aplikacji zgodnie z podejściem DDD (Domain-Driven Design) oraz CQRS Praktyczna znajomość Entity Framework Doświadczenie w pracy z MS SQL Server oraz T-SQL Znajomość usług chmurowych Microsoft Azure Doświadczenie w integracji systemów z wykorzystaniem Apache Kafka i/lub RabbitMQ Znajomość dobrych praktyk programistycznych oraz wzorców projektowych Umiejętność pracy zespołowej i samodzielnego rozwiązywania problemów Znajomość języka angielskiego na poziomie B2–C1 Mile widziane Doświadczenie w pracy z ASP.NET MVC Znajomość baz danych Oracle oraz PostgreSQL Doświadczenie frontendowe z Angular Znajomość TypeScript, RxJS oraz CSS Doświadczenie w pracy z Docker Znajomość Kubernetes Doświadczenie w projektach dla sektora bankowego lub finansowego Znajomość architektury mikroserwisowej i systemów rozproszonych Oferujemy Udział w zaawansowanych projektach dla sektora bankowego i finansowego Możliwość pracy zdalnej lub hybrydowej Elastyczne godziny pracy Stabilną współpracę przy długoterminowych projektach Możliwość rozwoju kompetencji w obszarze architektury systemów, chmury i nowoczesnych technologii .NET Dostęp do nowoczesnych narzędzi i technologii Współpracę z doświadczonym zespołem ekspertów IT Atrakcyjne wynagrodzenie adekwatne do doświadczenia i kompetencji Jeżeli chcesz rozwijać nowoczesne rozwiązania technologiczne, pracować z architekturą opartą o DDD, CQRS i chmurę Azure oraz realizować projekty o dużej skali biznesowej – zapraszamy do aplikowania.

🏢 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: The offer is for a Senior .NET Developer with 5+ years of experience to design, develop, and maintain scalable backend applications using modern .NET technologies. The role focuses on building high-quality APIs, contributing to architectural decisions, and ensuring application reliability in cloud-based environments. It involves close collaboration with cross-functional teams and strong engagement in testing, CI/CD, and production support. 🗂️ Requirements: Minimum 5 years of experience with .NET development, Strong experience with C# and .NET Core, Solid understanding of REST APIs, Experience with Entity Framework Core, Strong knowledge of SQL, Experience with cloud platforms (Azure or AWS), Experience with CI/CD pipelines, Experience with Git version control, Experience with unit and integration testing, Experience with message broker systems, Familiarity with agile development practices 📃 Skills: C#, .NET, .NETCore, REST, EntityFramework, SQL, Azure, AWS, CI/CD, Git, UnitTesting, IntegrationTesting, MessageBroker, Angular, Docker, Kubernetes, Microservices 🏢 Description: Summary: We’re looking for a highly skilled .NET Developer with a minimum of 5 years of experience. This role focuses on solving complex problems, building high-quality software, and contributing to a collaborative engineering culture. The candidate should be passionate about clean architecture, modern .NET development, and delivering impactful solutions. Responsibilities: Analyze, design, develop, and maintain applications using .NET / .NET Core. Build scalable backend services (APIs). Collaborate with cross-functional teams (Business, Dev, Infra, etc.). Participate in code reviews to elevate engineering standards. Contribute to architectural decisions and technical roadmaps. Provide business support and monitor applications (level 2 support, incident resolution, and troubleshooting). Key Requirements: Strong experience with C# and .NET Core. Solid understanding of REST APIs, Entity Framework Core, and SQL. Familiarity with cloud platforms (Azure or AWS). Experience with CI/CD pipelines and version control (Git). Strong testing culture: unit tests, integration tests, and production validation. Familiarity with agile development practices. A mindset focused on quality, performance, and maintainability. Experience with a message broker. Nice to Have: Knowledge of microservices architecture. Experience with front-end frameworks (Angular). Background in distributed systems or high-availability environments. Knowledge of Docker & Kubernetes. Experience with Azure functions. Other Details: This position allows for flexibility and may accommodate remote work arrangements. Candidates should be prepared for collaborative team engagements with a focus on delivering high-quality software solutions.

🏢 Summary: The role involves developing and maintaining applications within the .NET ecosystem, integrating them with cloud platforms, and supporting DevOps automation processes. The position focuses on building scalable solutions, managing CI/CD pipelines, and implementing Infrastructure as Code in Azure and GCP environments. The developer will collaborate with cross-functional teams to enhance data integration and deployment workflows. 🗂️ Requirements: Strong experience with C#, Strong experience with .NET framework or .NET ecosystem, Experience with Python, Experience with Azure, Experience with GCP, Knowledge of GitHub, Knowledge of GitHub Actions, Knowledge of Azure DevOps, Experience with CI/CD pipelines, Experience with Terraform, Experience with Infrastructure as Code, Fluency in Polish, Fluency in English 📃 Skills: C#, .NET, Python, Azure, GCP, GitHub, GitHubActions, AzureDevOps, CI/CD, Terraform, SQL, Spotfire, Signals 🏢 Description: Role Overview We are looking for a C#/.NET Developer with experience in cloud environments and DevOps practices to join our team. In this role, you will be responsible for developing and maintaining applications built on the .NET ecosystem, integrating them with cloud services, and supporting automation and deployment processes. You will work closely with cross-functional teams to build scalable solutions, integrate data and analytics tools, and improve development workflows through modern DevOps practices. Key Responsibilities Design, develop, and maintain applications using C# and .NET technologies . Support development and automation tasks using Python where appropriate. Work with cloud platforms (Azure and GCP) to deploy and manage applications and services. Implement and maintain DevOps processes , including CI/CD pipelines using GitHub, GitHub Actions, and Azure DevOps (ADO) . Manage infrastructure and environments using Infrastructure as Code tools such as Terraform . Integrate applications with analytics and visualization tools such as Spotfire . Work with Signals .NET framework–based systems to support data integration and application functionality. Collaborate with engineering, data, and DevOps teams to ensure reliable and scalable solutions. Required Skills Strong experience with C# and .NET framework / .NET ecosystem . Experience with Python for scripting, automation, or data-related tasks. Knowledge of DevOps tools and practices , including GitHub, GitHub Actions, and Azure DevOps (ADO) . Experience working with cloud platforms such as Microsoft Azure and Google Cloud Platform (GCP) . Familiarity with Infrastructure as Code , particularly Terraform . Experience working with SQL or data-driven applications is a plus. Good understanding of CI/CD pipelines and automated deployment processes . Polish and English must have Nice to Have Basic knowledge of Spotfire or other analytics/visualization tools. Experience with Signals platform and .NET-based integrations . Experience working in Agile development environments .

🏢 Summary: Senior C#/.NET Developer role focused on building and scaling high-performance backend systems for risk management, XVA, and asset-liability management within the financial domain. The position involves modernizing legacy components into a scalable, event-driven architecture and working across the full software development lifecycle in an agile, distributed team. Strong expertise in distributed systems, DevOps practices, and capital markets risk concepts is required. 🗂️ Requirements: 5+ years enterprise experience with C# and .NET (Web API, asynchronous programming, background services), Strong knowledge of distributed systems and Enterprise Integration Patterns, Experience with message brokers/service buses (e.g., RabbitMQ, MassTransit, Rebus), Solid experience with MS SQL Server or other relational databases, Experience with micro-ORMs (e.g., Dapper), Proficiency with Git-based repositories and CI/CD platforms (Jenkins, TeamCity, GitLab CI), Experience with configuration management tools (e.g., Ansible), Practical exposure to Generative AI / Agentic AI workflows in software engineering, Strong understanding of Capital Markets and derivatives (Listed and OTC), Knowledge of risk management concepts (Greeks, PnL Explain), Understanding of Valuation Adjustments (CVA, FVA) and liquidity/balance sheet metrics 📃 Skills: C#, .NET, ASP.NET, WebAPI, SignalR, RabbitMQ, MassTransit, Rebus, MSQL, Dapper, Git, Bitbucket, Jenkins, TeamCity, Ansible, CI/CD, SQL, XVA, ALM 🏢 Description: We are looking for a Senior C#/.NET Developer with Financial Domain Knowledge. In this role, you will be responsible for designing and scaling high-performance backend systems that support advanced risk management, valuation adjustments (XVA), and asset-liability management (ALM). You will work within a distributed, agile engineering team focused on modernizing legacy components into a highly scalable, event-driven architecture. Key Responsibilities Designing and developing high-performance C#/.NET applications and backend services Building scalable, event-driven and distributed systems in enterprise environments Developing asynchronous communication solutions using messaging frameworks (e.g. Rebus) Working with ASP.NET Web API, Windows Services, and SignalR Applying clean architecture, SOLID principles, and design patterns in daily development Collaborating in Agile teams across international environments Participating in full software development lifecycle, including architecture, implementation, testing, and deployment Working with CI/CD pipelines and DevOps tools such as Git, Bitbucket, Jenkins, TeamCity, and Ansible Optimizing and maintaining MS SQL databases and data-intensive applications Using ORM tools such as Dapper for efficient data access Contributing to code reviews, technical improvements, and engineering best practices Leveraging LLMs and AI-assisted development tools to improve software quality and engineering efficiency Delivering maintainable, scalable, and well-documented solutions under tight deadlines Requirements 5+ years of hands-on experience in enterprise-level software development using C# and the .NET ecosystem (including Web API, asynchronous programming, and background services). Strong command of System Architecture: practical knowledge of distributed systems, Enterprise Integration Patterns, and message brokers/service buses (e.g., RabbitMQ, MassTransit, Rebus or similar). Solid database experience with MS SQL Server (or other relational databases) and micro-ORMs (e.g., Dapper) optimized for high throughput. Proficiency with standard DevOps toolchains: Git-based repositories, modern CI/CD platforms (Jenkins/TeamCity/GitLab CI), and configuration management tools. Practical exposure to Generative AI / Agentic AI workflows applied to software engineering practices. Financial Domain Knowledge (Quantitative & Risk) Solid understanding of Capital Markets, including Listed and OTC derivatives. Familiarity with risk management concepts: Greeks (Delta, Gamma, Vega, Theta) and PnL Explain. Understanding of Valuation Adjustments (XVA) such as CVA, FVA. General awareness of Liquidity Risk, Balance Sheet Metrics, and transactional workflows (pre-trade/booking).

🏢 Summary: Hybrid Regular .NET Developer role focused on building and maintaining IT solutions for the financial sector, including Oracle-based systems and web applications. The position involves software development, system design, testing, documentation, and collaboration with business users and external vendors. Candidates should have strong experience with .NET technologies, SQL, web development, and enterprise-scale financial systems. 🗂️ Requirements: Very good knowledge of .NET framework, Ability to work with LLMs, Minimum 3 years of experience with C# and .NET, Experience with WCF, Experience with SQL and SSIS, Knowledge of ASP.NET MVC, Proficiency in JavaScript, Proficiency in jQuery, Proficiency in HTML5 and CSS3, Experience with Visual Studio Ultimate 2013, Knowledge of unit testing and test automation, Experience developing web applications, Understanding of OOP principles and design patterns, Experience designing IT systems for financial institutions or enterprise environments, Ability to analyze business and system requirements, English proficiency for technical documentation 📃 Skills: .NET, C#, WCF, SQL, SSIS, HTML, HTML5, ASP.NET, MVC, JavaScript, jQuery, CSS3, VisualStudio, OOP, LLM, Oracle, PLSQL, UML, ITIL, AGILE, XP 🏢 Description: .NET Developer (Regular) Financial Technology Sector | Hybrid Work (Łódź, Poland) Work Model: Hybrid (On-site 2 times a month in Łódź) Role Overview & Responsibilities We are seeking a skilled Regular .NET Developer to join our team and build high-quality IT solutions for the financial sector. In this role, you will be responsible for: Conducting design and implementation work in IT systems (including Oracle-based technologies). Collaborating with end/business users to gather and analyze data requirements for new solutions, specifically detailing general tasks and business concepts. Actively participating in internal software testing. Creating and updating technical and functional system documentation. Cooperating in the development of new solutions and defining technical directions. Implementing actions to improve data quality in systems and applications exporting data to the data warehouse. Supporting the review of technical specifications, as well as project, technical, and administrative documentation prepared by third-party vendors. Key Requirements Absolute Must-Haves: Very good knowledge of the .NET framework. Ability to work with Large Language Models (LLMs) . Strong teamwork skills combined with high independence. Experience & Technical Skills: Minimum 3 years of programming experience in IT projects using C#, .NET (including v4.5), WCF, SQL, SQL Server Integration Services (SSIS), HTML, and ASP.NET MVC. Proficiency in JavaScript, jQuery, jQuery UI, HTML5, and CSS3. Familiarity with Visual Studio Ultimate 2013. Knowledge of unit testing and the test automation process. Proven experience in developing web applications. Strong understanding of Object-Oriented Programming (OOP) principles and design patterns. Practical experience designing and programming IT systems for financial institutions (or similar enterprise environments in terms of scale, complexity, and quality standards). Soft Skills & Competencies: High degree of independence, goal orientation, and consistency in task execution. Excellent work organization, fast learning ability, and teamwork skills. Knowledge of business and system requirements analysis, specifically analytical thinking and precise communication. Ability to effectively cooperate with business clients, internal stakeholders, and external suppliers. High communication skills, natural inquisitiveness, and negotiation abilities. English proficiency sufficient for freely working with technical documentation and literature. Nice to Have Understanding of basic UX design principles. Familiarity with AGILE and XP methodologies. Knowledge of PL/SQL and Oracle databases. Practical knowledge of at least one CASE tool (e.g., Sparx Systems Enterprise Architect) and UML. Experience working in a matrix organizational structure. Familiarity with ITIL best practices.

🏢 Summary: Development of backend functionalities for a smart shopping cashback platform using .NET Core in a microservices architecture. The role involves building and maintaining services, integrating with external partners, optimizing SQL Server queries, and ensuring high code quality through testing and best practices. Work includes active participation in backlog refinement and sprint planning. 🗂️ Requirements: Minimum 5 years of experience in .NET Core and C#, Experience in designing and optimizing SQL Server queries, Experience with message queue systems, Experience in building and maintaining microservices, Backend development in .NET Core 📃 Skills: .NET, C#, SQLServer, AzureServiceBus, EventHub, Kafka, MQ, Microservices 🏢 Description: Dla Klienta z branży finansowej poszukujemy .NET Developera. Współpracując z nami będziesz zaangażowany w rozwój platformy smartshoppingowej, aplikacji cashbackowej. Zadania: Projektowanie i implementacja nowych funkcjonalności backendowych platformy w technologii .NET Core Rozwój i utrzymanie mikroserwisów oraz integracja z zewnętrznymi partnerami Implementacja i rozwój wyszukiwarek treści Tworzenie i optymalizacja zapytań do baz danych (SQL Server, Cosmos DB) Udział w analizie wymagań, refinementach backlogu i planowaniu sprintów Dbanie o jakość kodu poprzez testy jednostkowe, code review i zgodność z dobrymi praktykami. Wymagania: Min. 5 lat doświadczenia w programowaniu w .NET Core / C# Tworzenie i optymalizacja zapytań do baz danych (SQL Server) Praca z systemami kolejkowymi (preferowane Azure Service Bus, Event Hub lub Kafka, MQ) Umiejętność analitycznego myślenia i pracy z dokumentacją Mile widziana: Doświadczenie w pracy z search engines, preferowany Azure AI Search, ale też inne np. ElasticSearch Znajomość Azure Cosmos DB lub inne bazy NoSQL (np. MongoDB) i wie, kiedy je stosowa Doświadczenie w tworzeniu aplikacji uruchamianych w chmurze Azure (AppServices, Functions, Storage, Application Insights/Log analytics) Tworzenie dokumentacji API (Swagger/OpenAPI) Doświadczenie w tworzeniu backendu dla aplikacji mobilnych

🏢 Summary: Senior .NET Developer role focused on building and enhancing a cloud-native embedded finance platform in a regulated FinTech environment. The position involves designing, developing, and deploying scalable, secure features using a modern tech stack while ensuring high performance and reliability in production. You will work across backend and frontend technologies, contributing to CI/CD, cloud infrastructure, and event-driven systems. 🗂️ Requirements: 5+ years of software development experience, Strong OOP and system design skills, Hands-on experience with .NET and C#, Hands-on experience with Angular, Understanding of software testing concepts, Experience with cloud-native architectures, Experience with CI/CD and DevOps practices, Experience with relational databases, Experience with NoSQL databases, Knowledge of performance, security, and availability principles, Experience in FinTech, payments, banking, or regulated environments, Upper-Intermediate English or higher 📃 Skills: C#, .NET, Angular, AWS, CI/CD, Docker, Kubernetes, Kafka, RabbitMQ, Datadog, SQL, NoSQL, OOP, DDD 🏢 Description: Looking to take your .NET expertise to the next level while working on high-impact FinTech solutions? This role offers the chance to contribute to scalable, cloud-native systems that empower thousands of businesses worldwide. We’re seeking a Senior .NET Developer to join our team, collaborating with talented engineers, product managers, and designers to deliver innovative financial technology. At Sigma Software, we work with some of the most forward-thinking companies in the industry. This opportunity will let you grow professionally while making a tangible difference in a fast-paced, regulated environment. Customer Our customer is a leading FinTech company providing embedded financing solutions for platforms and marketplaces. Their mission is to enable businesses to offer flexible credit products to customers, helping SMEs access funding quickly and efficiently. The customer is recognized for innovation in embedded finance, serving thousands of businesses globally and partnering with major platforms. They operate in a regulated environment with a strong focus on scalability, performance, and security. Project The project involves enhancing and expanding customer’s embedded finance platform, which integrates directly into partner services to deliver fast, flexible funding to SMEs. You’ll work on a modern tech stack, building features that improve customer and partner experiences while ensuring reliability in production. Key Technologies: C#, .NET Core, Angular 18, AWS, CI/CD, Docker/Kubernetes, Kafka/RabbitMQ, Datadog, relational & NoSQL databases. Responsibilities Design, build, and deliver features and projects across C#, .NET Core, and Angular stack Write clean, maintainable, and well-tested code (unit/integration/e2e) Take ownership of features from requirements breakdown to deployment Deploy and monitor services in AWS cloud-native environments Handle production issues and incidents with accountability Collaborate with Product, Design, and Engineering teams in Agile practices Contribute to continuous improvement of systems and processes Requirements 5+ years of experience in software development with strong OOP and system design skills Solid hands-on experience with .NET (C#) and Angular Understanding of software testing concepts and practices Expertise in cloud-native and DevOps practices (CI/CD, automation, monitoring) Experience with relational and NoSQL databases Knowledge of non-functional requirements (performance, security, availability) Proven experience in FinTech, payments, banking, or regulated financial environments Upper-Intermediate English level or higher Will be a plus Experience with Docker/Kubernetes Familiarity with event-driven architectures (Kafka, RabbitMQ) Proficiency with observability tools (Datadog or similar) Knowledge of domain-driven design (DDD) and complex domain modeling Personal profile Growth mindset, curiosity, and proactivity Strong problem-solving skills balancing complexity and simplicity Feedback-oriented, open to giving and receiving constructive input Ownership & accountability in delivering commitments Team player with strong collaboration skills Adaptability to changing priorities Excellent communication skills across disciplines

🏢 Summary: Senior .NET Developer role focused on building and enhancing a scalable, cloud-native embedded finance platform in a regulated FinTech environment. The position involves designing and delivering full-stack features using .NET and Angular while ensuring high performance, security, and reliability in AWS. You will work on production-grade systems powering financial solutions for global businesses. 🗂️ Requirements: 5+ years of software development experience, Strong OOP and system design knowledge, Hands-on experience with C# and .NET, Hands-on experience with Angular, Understanding of software testing concepts and practices, Experience with cloud-native and DevOps practices, Experience with CI/CD, automation, and monitoring, Experience with relational databases, Experience with NoSQL databases, Knowledge of performance, security, and availability principles, Experience in FinTech, payments, banking, or regulated financial environments 📃 Skills: C#, .NET, Angular, AWS, CI/CD, SQL, NoSQL, OOP, DevOps, Testing 🏢 Description: Looking to take your .NET expertise to the next level while working on high-impact FinTech solutions? This role offers the chance to contribute to scalable, cloud-native systems that empower thousands of businesses worldwide. We’re seeking a Senior .NET Developer to join our team, collaborating with talented engineers, product managers, and designers to deliver innovative financial technology. At Sigma Software, we work with some of the most forward-thinking companies in the industry. This opportunity will let you grow professionally while making a tangible difference in a fast-paced, regulated environment. Customer Our customer is a leading FinTech company providing embedded financing solutions for platforms and marketplaces. Their mission is to enable businesses to offer flexible credit products to customers, helping SMEs access funding quickly and efficiently. The customer is recognized for innovation in embedded finance, serving thousands of businesses globally and partnering with major platforms. They operate in a regulated environment with a strong focus on scalability, performance, and security. Project The project involves enhancing and expanding customer’s embedded finance platform, which integrates directly into partner services to deliver fast, flexible funding to SMEs. You’ll work on a modern tech stack, building features that improve customer and partner experiences while ensuring reliability in production. Key Technologies: C#, .NET Core, Angular 18, AWS, CI/CD, Docker/Kubernetes, Kafka/RabbitMQ, Datadog, relational & NoSQL databases. Responsibilities Design, build, and deliver features and projects across C#, .NET Core, and Angular stack Write clean, maintainable, and well-tested code (unit/integration/e2e) Take ownership of features from requirements breakdown to deployment Deploy and monitor services in AWS cloud-native environments Handle production issues and incidents with accountability Collaborate with Product, Design, and Engineering teams in Agile practices Contribute to continuous improvement of systems and processes Requirements 5+ years of experience in software development with strong OOP and system design skills Solid hands-on experience with .NET (C#) and Angular Understanding of software testing concepts and practices Expertise in cloud-native and DevOps practices (CI/CD, automation, monitoring) Experience with relational and NoSQL databases Knowledge of non-functional requirements (performance, security, availability) Proven experience in FinTech, payments, banking, or regulated financial environments Upper-Intermediate English level or higher Will be a plus Experience with Docker/Kubernetes Familiarity with event-driven architectures (Kafka, RabbitMQ) Proficiency with observability tools (Datadog or similar) Knowledge of domain-driven design (DDD) and complex domain modeling Personal profile Growth mindset, curiosity, and proactivity Strong problem-solving skills balancing complexity and simplicity Feedback-oriented, open to giving and receiving constructive input Ownership & accountability in delivering commitments Team player with strong collaboration skills Adaptability to changing priorities Excellent communication skills across disciplines