Senior .NET Developer

🏢 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: Senior .NET Developer role focused on transforming a data-intensive analytical platform for the cloud. The position involves scalable architecture design, legacy modernization, SOA-based development, user support, and close collaboration with engineering, analysis, and QA teams. 🗂️ Requirements: 5+ years of .NET software development experience, Web services design and implementation expertise, AWS and cloud environment experience, Redux and Context API mastery in React applications, Software design principles and best practices, Advanced English 📃 Skills: .NET, AWS, React, Redux, Context, SOA, Webservices 🏢 Description: We are looking for a Senior .NET Developer to contribute to the cloud transformation of a data-intensive analytical platform. In this role, you will collaborate with innovative and diverse professionals from around the world, designing scalable architectures and modernizing legacy components to ensure performance and reliability. Tasks - Contribute to the cloud transformation of a data-intensive analytical platform by designing scalable architectures and modernizing legacy components - Ensure the product’s continuous technological evolution by proposing and implementing modern frameworks and architectural improvements - Apply Service Oriented Architecture (SOA) concepts in software design and development - Provide timely and courteous support to platform users, ensuring issues are understood, analyzed, and resolved promptly - Collaborate closely with software engineers, analysts, and quality engineers to design and build software solutions that meet business needs - Adhere to team design and coding procedures and standards Requirements - Minimum 5 years of software development experience with a strong focus on .NET technologies - Deep expertise in designing and implementing web services - Practical experience with AWS and cloud environments - Hands-on mastery of Redux and Context API in React applications - Strong understanding of software design principles and best practices - Advanced level of English Nice-to-have requirements - Experience with C#

🏢 Summary: Senior full-stack .NET Developer role focused on building scalable applications using .NET, Angular, and Microsoft Azure. The position involves designing cloud-based solutions, contributing to architecture decisions, and ensuring high code quality with modern engineering practices. Work includes CI/CD implementation and collaboration within Agile teams. 🗂️ Requirements: 4+ years commercial experience with .NET (C#, .NET/.NET Core, Entity Framework or other ORM, WCF), 3+ years experience with Angular (or React with recent Angular), 2+ years experience with Microsoft Azure services, Experience with REST or SOAP web services and APIs, Knowledge of software architecture and design patterns, Experience with Unit Testing and Clean Code principles, Strong SQL knowledge, Experience with Git and CI/CD pipelines, Experience with automated deployments, Fluent English 📃 Skills: C#, .NET, .NETCore, Angular, Azure, EntityFramework, WCF, SQL, REST, SOAP, Git, CI/CD, AzureFunctions, AzureLogicApps, AzureWebApps, AzureSQL, SQLServer 🏢 Description: Role Overview We are looking for a Senior .NET Developer with strong experience in Angular and Microsoft Azure to join our development team. In this role, you will work in a full-stack capacity, building scalable applications and cloud-based solutions while applying modern software engineering practices. You will collaborate with cross-functional teams, contribute to architecture decisions, and ensure high standards of code quality, testing, and continuous delivery. Key Responsibilities Design, develop, and maintain full-stack applications using .NET technologies and Angular . Apply object-oriented and functional programming principles to solve complex software engineering challenges. Write clean, maintainable, and well-tested code following recognized software design patterns and best practices. Develop and deploy solutions using Microsoft Azure services . Work in Agile development environments , contributing to sprint planning, reviews, and continuous improvement. Implement and support CI/CD pipelines to enable efficient and reliable software delivery. Collaborate with architects, developers, and stakeholders to design scalable and high-quality solutions. Skills & Attributes for Success Strong ability to write clean, readable, and maintainable code aligned with established coding standards. Solid understanding of software design patterns and architecture principles . Passion for continuous learning and exploring new technologies, particularly within the Azure ecosystem . Strong analytical and problem-solving skills. Ability to work effectively in a collaborative Agile environment. Required Qualifications 4+ years of commercial experience with .NET technologies (C#, .NET / .NET Core, Entity Framework or other ORM, WCF). 3+ years of experience with Angular (React experience combined with recent Angular experience is also acceptable). 2+ years of experience with Microsoft Azure services , such as: Azure Functions Azure Logic Apps Azure Web Apps Azure SQL / SQL Server Experience working with web services and APIs (REST / SOAP). Good knowledge of software architecture and design patterns . Experience with Clean Code principles and Unit Testing . Solid knowledge of SQL . Experience with Git , CI/CD pipelines , and automated deployment processes. Fluent English (spoken and written).

🏢 Summary: Senior full-stack role focused on building and maintaining scalable applications using .NET and React in Microsoft Azure. The position involves designing cloud-based solutions, contributing to architecture decisions, and ensuring high code quality, testing, and CI/CD practices within an Agile environment. 🗂️ Requirements: 4+ years commercial experience with .NET (C#, .NET/.NET Core, Entity Framework or other ORM, WCF), 3+ years experience with React (or Angular with recent React), 2+ years experience with Microsoft Azure services, Experience with REST or SOAP web services and APIs, Strong knowledge of software architecture and design patterns, Experience with Clean Code principles and Unit Testing, Solid knowledge of SQL, Experience with Git and CI/CD pipelines, Experience with automated deployments, Fluent English 📃 Skills: C#, .NET, .NETCore, EntityFramework, WCF, React, Angular, Azure, AzureFunctions, AzureLogicApps, AzureWebApps, AzureSQL, SQLServer, REST, SOAP, SQL, Git, CI/CD, UnitTesting 🏢 Description: Role Overview We are looking for a Senior .NET Developer with strong experience in React and Microsoft Azure to join our team. In this role, you will work on designing and developing modern full-stack applications, applying best engineering practices and delivering scalable solutions in a cloud environment. You will collaborate closely with cross-functional teams, contribute to architecture decisions, and ensure high standards of code quality, testing, and continuous delivery. Key Responsibilities Design, develop, and maintain full-stack applications using .NET technologies and React . Apply object-oriented and functional programming principles to solve real-world engineering challenges. Write clean, maintainable, and well-tested code following established software design patterns and best practices. Develop and deploy solutions in Microsoft Azure cloud environments . Participate in Agile software development processes , including sprint planning, reviews, and retrospectives. Implement and maintain CI/CD pipelines to enable efficient and reliable software delivery. Collaborate with architects, developers, and stakeholders to design scalable and high-quality solutions. Skills & Attributes for Success Strong ability to write clean, readable, and maintainable code aligned with established design patterns and coding standards. Passion for continuous learning and exploring new technologies, especially within the Azure ecosystem . Strong analytical and problem-solving skills. Ability to work effectively in a collaborative and Agile team environment. Required Qualifications 4+ years of commercial experience with .NET technologies (C#, .NET / .NET Core, Entity Framework or other ORM, WCF). 3+ years of experience with React (Angular experience combined with recent React experience is also acceptable). 2+ years of experience with Microsoft Azure services , such as: Azure Functions Azure Logic Apps Azure Web Apps Azure SQL / SQL Server Experience working with web services and APIs (REST / SOAP). Strong knowledge of software architecture and design patterns . Experience with Clean Code principles and Unit Testing . Solid knowledge of SQL . Experience with source code management (Git) and CI/CD pipelines , including automated deployment. Fluent English (both written and spoken).

🏢 Summary: Senior .NET Developer role for a long-term international project focused on scalable SaaS and compliance intelligence solutions in the EHS domain. The position involves building microservices and event-driven systems, contributing to cloud-native architecture, and mentoring engineers within Agile teams. Hybrid work model based in Lisbon with two office days per week. 🗂️ Requirements: 6+ years experience with .NET and C#, Experience designing microservices architectures, Experience with event-driven systems and messaging platforms, Knowledge of relational and non-relational databases, Experience working in Agile environments, Technical leadership or mentoring experience, Strong analytical and problem-solving skills 📃 Skills: .NET, C#, Microservices, Kafka, RabbitMQ, Pulsar, SQL, NoSQL, PostgreSQL, Elasticsearch, MongoDB, Redis, DynamoDB, SaaS, Agile 🏢 Description: Position: Senior .NET Developer Location: Lisbon, Portugal (Hybrid model – 2 days per week in the office) Project Scope: International We are looking for a Senior .NET Developer to join a world-leading company specialising in compliance intelligence in the field of Environment, Health and Safety (EHS), for a long-term project in an international environment . Key Technologies & Stack: • .NET / C# • Microservices Architecture • Event-Driven Systems (Kafka, RabbitMQ, Pulsar) • SQL & NoSQL Databases (PostgreSQL, Elasticsearch, MongoDB, Redis, DynamoDB) Key Responsibilities: • Design, develop, and maintain scalable SaaS solutions with a strong focus on performance, reliability, and maintainability. • Contribute to architectural decisions involving microservices, distributed systems, and cloud-native applications. • Build and enhance event-driven platforms leveraging modern messaging and streaming technologies. • Promote engineering excellence through code quality, best practices, testing, and continuous improvement initiatives. • Collaborate closely within Agile development teams throughout the entire software delivery lifecycle. • Provide technical guidance and mentorship to fellow engineers, fostering knowledge sharing and team growth. Requirements: • 6+ years of professional experience developing applications with .NET and C#. • Strong hands-on experience designing and implementing microservices-based architectures. • Proven experience working with event-driven systems and messaging platforms. • Solid understanding of both relational and non-relational databases, with the ability to select the most appropriate solution based on business and technical requirements. • Experience working in Agile environments. • Previous exposure to technical leadership, coaching, or mentoring responsibilities. • Strong analytical and problem-solving skills, with the ability to work independently on complex technical challenges.

🏢 Summary: 6-miesięczny kontrakt z możliwością przedłużenia dla Senior .NET Developera odpowiedzialnego za projektowanie, rozwój i utrzymanie skalowalnych aplikacji backendowych oraz API. Rola obejmuje współpracę z zespołami projektowymi, projektowanie architektury, optymalizację rozwiązań, utrzymanie systemów produkcyjnych i wsparcie mniej doświadczonych osób. 🗂️ Requirements: Minimum 6 lat komercyjnego doświadczenia w C#/.NET, Bardzo dobra znajomość .NET Core / .NET 6+, Doświadczenie w projektowaniu i rozwoju aplikacji backendowych oraz REST API, Znajomość wzorców projektowych i zasad SOLID, Doświadczenie w pracy z bazami danych SQL, Znajomość Git i praktyk CI/CD, Doświadczenie w Agile, Scrum lub Kanban, Bardzo dobra znajomość języka angielskiego 📃 Skills: C#, .NET, SQL, REST, Git, CI/CD, Agile, Scrum, Kanban, SOLID 🏢 Description: Poszukujemy doświadczonego Senior .NET Developera (C#) do realizacji projektu dla klienta. Jest to kontrakt na 6 miesięcy z możliwością przedłużenia współpracy. Zakres obowiązków - Projektowanie, rozwój i utrzymanie aplikacji backendowych w technologii C#/.NET. - Tworzenie oraz rozwijanie wydajnych i skalowalnych usług oraz API. - Współpraca z zespołem projektowym przy analizie wymagań biznesowych i technicznych. - Dbanie o wysoką jakość kodu poprzez stosowanie dobrych praktyk programistycznych oraz udział w code review. - Identyfikowanie i rozwiązywanie problemów technicznych oraz optymalizacja istniejących rozwiązań. - Tworzenie i aktualizacja dokumentacji technicznej. - Udział w projektowaniu architektury aplikacji oraz proponowanie usprawnień technologicznych. - Współpraca z zespołami QA, DevOps oraz analitykami w celu sprawnej realizacji projektu. - Wsparcie mniej doświadczonych członków zespołu oraz dzielenie się wiedzą. - Aktywny udział w procesie wdrażania nowych funkcjonalności i utrzymania systemów produkcyjnych. Wymagania - Minimum 6 lat doświadczenia komercyjnego w programowaniu w C#/.NET. - Bardzo dobra znajomość platformy .NET (.NET Core / .NET 6+). - Doświadczenie w projektowaniu i rozwoju aplikacji backendowych oraz REST API. - Znajomość wzorców projektowych i zasad SOLID. - Doświadczenie w pracy z bazami danych SQL. - Znajomość Git oraz praktyk CI/CD. - Umiejętność pracy w metodykach Agile (Scrum/Kanban). - Bardzo dobra znajomość języka angielskiego umożliwiająca pracę w międzynarodowym środowisku.

🏢 Summary: Senior .NET Developer role focused on building secure, scalable, cloud-native enterprise solutions on Azure. The position involves developing serverless applications, backend APIs, data integrations, and CI/CD-enabled delivery in an Agile, hybrid team environment. 🗂️ Requirements: 7+ years of professional software development experience, Hands-on C# and .NET Core/.NET 6+ experience, Azure Functions development and deployment experience, Azure Storage Accounts and Blob Storage expertise, Azure Key Vault expertise, Event-driven and asynchronous processing knowledge, OOP, design patterns, and SOLID principles knowledge, CI/CD pipeline experience with Azure DevOps or GitHub Actions, Agile/Scrum team experience, English communication skills 📃 Skills: C#, .NET, Azure, Functions, Blob, KeyVault, ServiceBus, AppServices, SQL, CosmosDB, CI/CD, DevOps, GitHub, ARM, Bicep, Terraform, OOP, SOLID, Agile, Scrum 🏢 Description: About the Role We are looking for an experienced and passionate Senior .NET Developer with strong Azure expertise to join our engineering team. In this role, you will design, develop, and enhance scalable digital products and technology services used by clients and internal teams worldwide. You will work in a modern cloud-native environment, contribute to high-impact projects, and collaborate with cross-functional teams to build secure, reliable, and highly available enterprise solutions. Key Responsibilities - Design, develop, and deploy serverless applications using Azure Functions - Build and optimize integrations with Azure Blob Storage for large-scale data handling - Implement secure access and secrets management using Azure Key Vault - Develop scalable backend services and APIs using .NET 6+ / .NET Core - Apply software engineering best practices: code reviews, automated testing, and CI/CD - Ensure security, reliability, and performance across all delivered solutions - Troubleshoot production issues and contribute to system improvements - Collaborate closely with cross-functional teams in an Agile environment - Advocate for clean code, maintainable architecture, and technical excellence Required Skills & Experience - 7+ years of professional software development experience - Strong hands-on experience with C# and .NET Core / .NET 6+ - Proven experience building and deploying Azure Functions (Durable Functions is a plus) - Deep experience with Azure Storage Accounts and Blob Storage (containers, lifecycle management, access tiers) - Strong experience with Azure Key Vault (secrets, certificates, access policies) - Experience with other Azure services: - Azure Service Bus - Azure App Services / Web Apps - Azure SQL / Cosmos DB (nice to have) - Solid understanding of event-driven and async processing patterns - Strong knowledge of OOP, Design Patterns, and SOLID principles - Experience with CI/CD pipelines (Azure DevOps or GitHub Actions) - Working knowledge of Infrastructure as Code (ARM / Bicep / Terraform) – nice to have - Experience working in Agile / Scrum teams - Strong analytical and problem-solving skills - Excellent communication skills in English (Polish is a plus)

🏢 Summary: Senior .NET Developer role focused on building and enhancing scalable, cloud-native enterprise solutions using .NET 6+ and Microsoft Azure. The position involves designing modern APIs, contributing to microservices architecture, and ensuring high availability, security, and reliability in production systems. The role is hybrid in Krakow and emphasizes DevOps, automation, and engineering best practices. 🗂️ Requirements: 7+ years professional software development experience, Strong hands-on experience with C#, Strong experience with .NET Core / .NET 6+, Proven experience building modern APIs and enterprise applications, Strong experience with Microsoft Azure services (AKS, Azure Containers, Azure Web Apps, Azure Functions, Azure Service Bus, Azure Storage Accounts, Azure Key Vault), Strong experience with Containers and Kubernetes, Solid understanding of Microservices architecture, Strong knowledge of Object-Oriented Programming and SOLID principles, Understanding of Multi-threading and concurrent programming, Experience with Cloud Architecture and Engineering on Azure, Experience working in Agile environments, Experience with TDD and DevOps practices, Strong analytical and troubleshooting skills, Excellent verbal and written communication skills 📃 Skills: C#, .NET, ASP.NET, Azure, AKS, Kubernetes, Docker, Microservices, REST, API, CI/CD, DevOps, TDD, OOP, SOLID, Multithreading, AzureFunctions, AzureServiceBus, AzureStorage, AzureKeyVault, EventGrid, ContainerApps 🏢 Description: Location: Krakow, hybrid 3 days/week About the Role We are looking for an experienced and passionate Senior .NET Developer with strong Azure expertise to join our engineering team. In this role, you will design, develop, and enhance scalable digital products and technology services used by clients and internal teams worldwide. You will work in a modern cloud-native environment, contribute to high-impact projects, and collaborate with cross-functional teams to build secure, reliable, and highly available enterprise solutions. Key Responsibilities Design, develop, and improve enterprise-grade digital products and technology services Analyze business and user requirements to deliver scalable and efficient technical solutions Develop modern APIs and backend services using .NET 6+ and Azure cloud technologies Apply software engineering best practices including automated testing, CI/CD, and DevOps methodologies Ensure quality, security, reliability, and compliance across all delivered solutions Build observability into applications, monitor production systems, troubleshoot incidents, and resolve root causes Contribute to cloud-native and microservices-based architecture initiatives Collaborate closely with product owners, architects, and engineering teams to deliver business value Advocate for client and user needs while driving technical excellence Share knowledge with peers, mentor team members, and contribute to engineering culture and hiring activities Required Skills & Experience 7+ years of professional software development experience Strong hands-on experience with C# and .NET Core / .NET 6+ Proven experience building modern APIs and enterprise applications using .NET technologies Strong experience with Microsoft Azure services including: AKS (Azure Kubernetes Service) Azure Containers Azure Web Apps Azure Functions Azure Service Bus Azure Storage Accounts Azure Key Vault Strong experience with Containers and Kubernetes Solid understanding of Microservices and Event-Driven Architecture Strong knowledge of Object-Oriented Programming, Design Patterns, and SOLID principles Good understanding of Multi-threading and concurrent programming Experience with Cloud Architecture and Engineering on Azure platforms Experience with: Azure App Services Container Apps Event Grid Experience working in Agile environments using TDD and DevOps practices Passion for Software Craftsmanship, Clean Code, and engineering best practices Strong analytical, troubleshooting, and problem-solving skills Excellent verbal and written communication skills Nice to Have Experience implementing: Service-Oriented / Microservice Architectures Event-Based Architectures Loosely Coupled Systems Reusable Enterprise Components Experience working with distributed systems and high-scale applications Exposure to observability and monitoring tools

🏢 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: Senior Fullstack .NET Developer role for a long-term, fully remote banking programme modernising and scaling cloud-based banking and securities platforms. The role focuses primarily on C#/.NET development, Azure migration, event-driven solutions and Angular front ends, with end-to-end delivery responsibility and occasional on-call support. Offers up to 180 PLN/h + VAT on B2B, UK working hours, and significant technical impact across an international organisation. 🗂️ Requirements: 7+ years of professional .NET development experience, Strong hands-on C# and modern .NET experience, Full-stack development experience, Commercial Angular or modern frontend framework experience, SOLID principles and software design expertise, Unit and integration testing experience, MongoDB or document-oriented database experience, Event-based messaging framework familiarity, Independent full development lifecycle delivery, Availability for occasional on-call shifts, Strong communication skills, Proactive, responsible approach 📃 Skills: C#, .NET, Angular, MongoDB, Azure, Murex, SOLID, Messaging, Queueing, Containers, Testing 🏢 Description: Rate: up to 180 PLN/h + VAT under a B2B contract Work model: 100% remote Cooperation: Long-term, within the banking sector Working hours: UK working hours Start date: ASAP / flexible Benefits - Significant technical impact across a large international organisation - Opportunity to work with modern cloud, messaging and database technologies Description We are looking for an experienced Senior Fullstack .NET Developer to join an international banking programme focused on scaling cloud-based platforms and building a unified architecture for banking and securities operations. About the project The programme is focused on combining banking and securities operations within a common technology landscape. The UK architecture has been selected as the target model and is now being extended to support the wider organisation. The team is migrating applications to Azure, introducing containerised solutions and gradually moving away from traditional SQL-based systems towards MongoDB and document-oriented databases. You will work across a portfolio of approximately 17 internally developed applications supporting areas such as Product Control and Risk Management. Responsibilities - Develop and extend applications using C# and .NET (80% of workload) - Build scalable systems capable of supporting additional business entities - Contribute to the migration of applications and business logic to Azure - Develop event-driven and message-based solutions - Work with Angular-based frontend applications - Design solutions in line with SOLID principles and clean-code practices - Write and maintain unit and integration tests - Take end-to-end responsibility for development, testing and implementation - Cooperate closely with Business Analysts and other project stakeholders - Support production applications and participate in occasional on-call shifts Technology environment - C# / .NET - Angular - MongoDB - Event-driven architecture - Messaging and queueing frameworks - Azure - Containerised applications - Murex and internally developed platforms - Unit and integration testing What we are looking for - At least 7 years of professional .NET development experience - Strong hands-on experience with C# and modern .NET - Full-stack development experience - Commercial experience with Angular or another modern frontend framework - Very good understanding of SOLID principles and software design - Experience with unit and integration testing - Experience with MongoDB or other document-oriented databases - Familiarity with event-based messaging frameworks - Ability to work independently across the full development lifecycle - Strong communication skills and a proactive, responsible approach On-call responsibility The position includes an occasional on-call element, typically around 1–2 shifts per month. Recruitment process The recruitment process consists of two stages: - A technical coding assignment, estimated at approximately 2–4 hours - A technical interview focused on your solution, design decisions, testing approach and understanding of software engineering principles