April 24, 2026
Senior C# WPF UI Developer
Senior • Remote
180 - 250 PLN
Warsaw, Poland
Senior C# / WPF UI Developer
Multi‑Asset Risk – Front Office IT
Poland (Remote)
Overview
We’re working with a Major Investment Bank on a Front Office IT role within their Multi‑Asset Risk function. This is a dedicated UI position, focused on building and supporting a rich WPF desktop application used directly by traders to monitor intraday risk across FX Options and Commodities.
This is a mature, business‑critical platform with a strong roadmap of new features alongside ongoing support and bug fixing. They’re looking for a fully rounded .NET developer who can own work end‑to‑end, communicate well, and operate confidently in a Front Office environment.
The Platform
The application is a high‑throughput, compute‑intensive desktop system used by traders to:
Monitor intraday risk on individual books and portfolios
Analyse hundreds of granular risk measures (Greeks and beyond)
Run multiple dynamic reports as market conditions evolve throughout the day
The backend is entirely Java (risk calculations farmed out to compute engines). This role sits squarely in the C# / WPF UI layer.
What You’ll Be Doing
Developing new UI features on a large, mature WPF application
Fixing bugs and improving stability on a business‑critical front office system
Working closely with Front Office users, other UI engineers, and backend teams
Owning issues from investigation through to resolution rather than passing them on
What They’re Looking For
Core skills
Strong commercial experience with C# and WPF
Solid .NET fundamentals and confidence working in large codebases
Experience building rich desktop UIs with high data volumes
Rx / reactive programming experience is a plus, but not mandatory
Mindset & behaviours (very important)
A genuine self‑starter who takes ownership and follows things through
Comfortable working in Front Office IT – not just a “head‑down coder”
Strong communicator who collaborates rather than sitting on problems
Someone trusted to make changes without introducing unnecessary risk
Pragmatic, competent, and commercially aware
Team & Location
UI team is based in London hours
Global Front Office presence (Singapore, London, New York)
Fully remote role
Contract Details
At least 12 months of work
Long‑running, stable programme with an established codebase
Similar jobs you might like
Technology
DCV Technologies
Senior .NET Developer (WPF / Desktop Applications)
Senior
Hybrid
Łódź, Poland
🏢 Summary: Senior .NET/WPF Developer role focused on designing, developing, and maintaining advanced desktop applications in a hybrid work model. The position involves working with modern .NET technologies, reporting tools, and MS SQL Server, while collaborating with database teams and participating in client interactions. 🗂️ Requirements: 8+ years of experience with .NET technology stack, Strong expertise in WPF, .NET Framework 4.6+ proficiency, Strong knowledge of C#.NET, Experience with Unity Framework, Experience with Entity Framework 6, Experience with MS SQL Server, Experience with reporting tools: Crystal Reports, RDLC, Aspose, Excel, Proficiency with Visual Studio 2015/2017 Professional, Experience with SSDT, Fluent Polish and English, Availability for hybrid work (2–3 days onsite) 📃 Skills: WPF, .NET, C#, Unity, EntityFramework, MSSQL, CrystalReports, RDLC, Aspose, Excel, VisualStudio, SSDT 🏢 Description: Location: Łódź or Warsaw, Poland. Hybrid 2/3 days per week. Language Requirements: English & Polish About the Role: We are looking for an experienced Senior .NET/WPF Developer to join the team. This role involves developing and maintaining advanced desktop applications and contributing to high-quality software solutions. Key Responsibilities: Design, develop, and maintain desktop applications using WPF , .NET Framework 4.6+ , C#.NET , and Unity Framework . Work with Entity Framework 6 for database interactions. Develop, customize, and maintain reports using Crystal Reports , RDLC , Aspose , and MS Excel . Collaborate with database teams using MS SQL Server . Use Visual Studio 2015/2017 Professional and SSDT for development and database management. Participate in client interactions Requirements: 8+ years of experience with the technology stack listed above. Strong expertise in WPF, .NET Framework 4.6+, C#.NET, Unity Framework, Entity Framework 6 . Solid experience with MS SQL Server and reporting tools ( Crystal Reports, RDLC, Aspose, Excel ). Proficient with Visual Studio 2015/2017 Professional and SSDT . Fluent in Polish and English (both written and spoken). Ability to work 2–3 days per week onsite , and full-time during client visits (1 week) as required.
Technology
Experis Manpower Group
Full Stack Developer (React & .NET)
Mid
Remote
Warsaw, MZ, Poland
140 - 160 PLN/hr
🏢 Summary: Full Stack Developer role focused on building scalable, cloud-native applications using React and C# .NET Core in a capital markets environment. The position involves developing microservices, REST APIs, data pipelines, and analytical solutions supporting credit and market risk domains. 100% remote B2B contract with flexible start date. 🗂️ Requirements: 4-5+ years of full stack development experience, Strong expertise in React, Strong expertise in C#, Experience with .NET Core, Experience with microservices architecture, Experience with event-driven architecture, Experience with distributed systems, Experience building REST APIs, Hands-on experience with Python, Experience with PySpark, Experience with Power BI, Experience with data modeling, Experience in credit risk and market risk domains 📃 Skills: React, C#, .NETCore, Microservices, REST, TypeScript, Python, PySpark, PowerBI, DataModeling, DistributedSystems, EventDriven, Cloud 🏢 Description: Start Date: ASAP / Within 1 Month / Flexible Work Model: 100% remote Contract Type: B2B (140-160 PLN/h + VAT) We are looking for a highly skilled Full Stack Developer with deep expertise in React for frontend development and C# .NET Core for backend services. This role requires hands‑on experience building scalable, cloud‑native systems, along with strong exposure to capital markets, especially within credit risk and market risk domains. Expectations Minimum 4-5 years of professional software development experience across frontend and backend technologies. Strong expertise in React, C# .NET Core , microservices, event‑driven architecture, and distributed systems. Hands‑on experience with Python (pyspark), Power BI dashboards, data modeling, and analytical reporting. Responsibilities Develop and maintain full stack applications using React, C# .NET Core, and modern cloud‑native technologies. Build scalable backend services, REST APIs, and microservices with a focus on performance and resilience. Implement modular, accessible, and high‑quality frontend components using React and TypeScript. Collaborate with business and risk experts to deliver solutions in credit risk, market risk, and capital markets workflows. Work with Python (pyspark) to build data pipelines, transformations, and analytics processes. What We Offer Medicover healthcare package Multisport card Access to an e-learning platform Group life insurance
Technology
Be | Shaping the Future Poland
Senior .NET Developer
Senior
Remote
Warsaw, Poland
130 - 140 PLN
🏢 Summary: Opportunity for an experienced .NET Developer to build and maintain C#/.NET components integrated with a third-party portfolio management system while developing Angular-based front-end features. The role focuses on REST API integrations, system interoperability, and collaboration with cross-functional teams in an enterprise environment. You will contribute to code reviews, testing, deployments, and technical troubleshooting within an Agile setup. 🗂️ Requirements: 5+ years of experience in .NET/C# development, Strong knowledge of OOP principles and design patterns, Experience with REST APIs and backend integrations, Familiarity with enterprise or large-scale application environments, Strong problem-solving skills and attention to detail, Fluent English (written and spoken), Based in Poland 📃 Skills: C#, .NET, Angular, REST, OOP, SQL, C++, Agile 🏢 Description: Be | Shaping the Future Poland has a proven position of being a reliable partner for financial services organisations to analyse complex requirements, find solutions and implement them in their entirety, regardless of their complexity. Since the foundation of Be Poland in 2013, we have been continually expanding and customising our spectrum of services. Today, we are privileged to have in our team the best individuals in each sector we operate within the financial services industry. Responsibilities: Develop and maintain C#/.NET components supporting integration with a third‑party portfolio management tool Support integration workflows involving data exchange, REST APIs, and system interoperability Collaborate with internal technical and business teams to understand platform requirements and architecture Participate in code reviews, testing activities, and deployment processes Investigate and troubleshoot technical issues with guidance from senior team members Requirements: 5+ years of experience in .NET/C# development Good understanding of OOP principles, design patterns, and clean code practices Experience working with REST APIs and backend integration Familiarity with enterprise systems or larger application environments Strong problem‑solving skills and attention to detail Fluency in English (written and spoken) Poland based Nice to have: Practical experience with C++ Experience in financial services (Equities, Funds, or Trading systems) Exposure to portfolio management or trading platforms Basic understanding of SQL, message queues, or real-time data processing Experience working in Agile teams Our offer: Competitive remuneration on B2B contract Option to activate Medicover and Multisport on preferential terms Access to Mindgram – mental health & well-being platform Free gym at Q22 Personal development – internal online / onsite DevTalks Referral bonus program International environment
Technology
CSHARK
.NET WinForms Developer
Senior
Remote
Wroclaw, Poland
21,000 - 23,500 PLN/hr
🏢 Summary: The offer is for an experienced .NET WinForms Developer to build high-performance, real-time desktop trading applications with custom-rendered UI components. The role focuses on developing fast, responsive WinForms controls, handling continuous data streams, and optimizing multi-threaded UI performance. It involves close collaboration with backend engineers to ensure low-latency communication and smooth real-time updates. 🗂️ Requirements: 5+ years commercial experience in C# and .NET desktop development, Strong expertise in Windows Forms, Experience building custom WinForms controls from scratch, Experience with real-time data streams pushed to UI, Strong understanding of multi-threaded UI applications, Experience optimizing UI rendering performance and reducing GC pressure, Experience with TCP or socket-based communication, Fluent English (B2+) 📃 Skills: C#, .NET, .NET8, WinForms, TCP, Sockets, Multithreading, GC, Rendering, UI, C++ 🏢 Description: We are looking for an experienced .NET WinForms Developer to join the frontend engineering team and help build high-performance, real-time trading applications used by professional traders. This role is not about configuring UI frameworks - it is about crafting fast, responsive, custom-rendered desktop UI . IN SHORT: 🌎 100% remote or from the office (Wrocław, Bielsko-Biała) - You choose! 💰 125 - 140 PLN/h ☑️ B2B contract 💻 >5 years of commercial programming experience Your Daily Missions Design, implement and optimize custom WinForms controls (charts, grids, interactive visualization components). Work with continuous real-time data streams and ensure ultra-responsive UI under load. Ensure smooth multi-threaded UI updates without blocking or freezing. Collaborate with backend engineers (C++ systems) to maintain low-latency TCP/socket communication . Profile, debug, and tune rendering performance (GC pressure, paint cost, batching, flicker control). Improve engineering practices, and influence UI architecture and usability. The Essentials We're Seeking 5+ years of hands-on experience developing desktop applications in C#/.NET (preferably .NET 8). Strong expertise in Windows Forms . Proven experience building custom UI controls from scratch (inheriting from base controls and implementing custom rendering - not configuring DevExpress/Telerik/Infragistics). Experience working with continuous real-time data streams , where data is pushed to the UI (not periodic refresh). Strong understanding of multi-threaded UI applications (updating UI safely from worker threads, avoiding freezes and stalls). Practical experience in UI performance optimization (reducing redraw cost, minimizing GC pressure, batching updates, preventing flicker). Experience working with TCP / socket-based communication . Ability to clearly explain previous UI design decisions, trade-offs, and the impact on end users . Fluency in English (minimum B2+ ). Nice to Have Experience with trading systems , market data, or real-time financial applications. Familiarity with C++ or interoperability between C# and native components. Understanding of high-performance visualization and data interaction patterns. Reasons Why You Would Enjoy Working With Us We work in the latest technologies and with international clients, and our projects are polished from < to /> - learn about some of the projects we have completed. We organize TechTalks, meet-ups and create guilds where we exchange knowledge - you can learn a lot from your teammates. We have a close-knit team and we make sure to have regular integrations - we often go out to celebrate together. You can work remotely or choose to work from our offices in Wroclaw or Bielsko-Biala. However, we count on your openness to occasionally visit the office for team meetings or client visits, or possible occasional trips to the client's headquarters. You can adjust your working hours to suit your needs, starting your day between 7:00 and 10:00 am. You can work with great specialists in their fields who also have a sense of humor and other after-hours hobbies. It is the people who create the unique atmosphere and relaxed atmosphere at CSHARK. We have a flat structure - we are not a corporation and don't want to be one 🙃. We offer bonuses for employee referrals (from 3000 PLN to 7000 PLN).
Technology
ITDS
React Frontend Developer – Java/Python Backend Exposure
Senior
Hybrid
Warsaw, Poland
22,050 - 25,200 PLN
🏢 Summary: Senior Frontend Developer role focused on building and optimizing high-performance, scalable user interfaces for high-frequency trading platforms in a hybrid Warszawa-based model. The position involves developing React-based solutions, enhancing trading infrastructure, and ensuring low-latency performance in financial systems. You will contribute to modern frontend workflows and collaborate on delivering robust, scalable digital trading solutions. 🗂️ Requirements: Minimum 4 years commercial frontend development experience, Strong proficiency in React JS, Strong proficiency in JavaScript, Strong proficiency in modern CSS, Experience with Jest testing framework, Experience with CI/CD processes, Working knowledge of GitLab, Understanding of design patterns, Understanding of programming best practices, Fluent English, Legal right to work in the European Union 📃 Skills: React, JavaScript, CSS, SCSS, Jest, GitLab, CI/CD, npm, Java, Python, Ag-Grid 🏢 Description: Empower scalable UI innovation — shape the future of high-frequency trading platforms! Location & Work Model Warszawa-based opportunity with hybrid work model. As a Senior Frontend Developer, you will be working for our client, a leader in systematic trading strategies within the financial industry. You will contribute to building and optimizing critical trading infrastructure across derivatives, FX, commodities, rates, and single stocks, helping to drive performance and scalability in digital trading solutions. Join us and be at the forefront of innovation and growth in financial technology. Your main responsibilities: Develop and optimize high-performance, scalable user interfaces using React JS (Hooks / Context API). Implement modern CSS techniques (CSS-in-JS / SCSS) to enhance user experiences. Collaborate with cross-functional teams to deliver seamless frontend solutions. Write robust unit tests with Jest and contribute to code quality standards. Contribute to modern frontend workflows, including npm, CI/CD pipelines (GitLab). Support backend integration using Java or Python (exposure welcome). Participate actively in UI design discussions to align with UX principles. Maintain and improve existing systems, ensuring low latency and high-volume trading efficiency. You're ideal for this role if you have: Minimum 4 years of commercial frontend development experience. Strong proficiency in React JS, JavaScript, and modern CSS. Sound understanding of design patterns and best programming practices. Experience with Jest testing framework. Working knowledge of CI/CD processes and tools (GitLab). Basic backend knowledge in Java or Python is a plus. It is a strong plus if you have: (optional) Experience with Ag-Grid library. Knowledge of good UX principles. Certifications or additional training in frontend technologies. Language Required for the role: Fluent English. Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.
Technology
ITDS
React Frontend Developer – Java/Python Backend Exposure
Senior
Hybrid
Warsaw, Poland
22,050 - 25,200 PLN
🏢 Summary: Senior Frontend Developer role focused on building and optimizing high-performance, scalable user interfaces for high-frequency trading platforms in a hybrid model in Warsaw. The position involves developing React-based solutions, enhancing UI performance, and supporting integration with backend systems in a low-latency trading environment. 🗂️ Requirements: Minimum 4 years commercial frontend development experience, Strong proficiency in React JS, Strong proficiency in JavaScript, Strong proficiency in modern CSS, Experience with Jest testing framework, Experience with CI/CD tools (GitLab), Understanding of design patterns and best programming practices, Fluent English, Legal right to work in the EU 📃 Skills: React, JavaScript, CSS, SCSS, Jest, GitLab, CI/CD, npm, Java, Python, Ag-Grid 🏢 Description: Empower scalable UI innovation — shape the future of high-frequency trading platforms! Location & Work Model Warszawa-based opportunity with hybrid work model. As a Senior Frontend Developer, you will be working for our client, a leader in systematic trading strategies within the financial industry. You will contribute to building and optimizing critical trading infrastructure across derivatives, FX, commodities, rates, and single stocks, helping to drive performance and scalability in digital trading solutions. Join us and be at the forefront of innovation and growth in financial technology. Your main responsibilities: Develop and optimize high-performance, scalable user interfaces using React JS (Hooks / Context API). Implement modern CSS techniques (CSS-in-JS / SCSS) to enhance user experiences. Collaborate with cross-functional teams to deliver seamless frontend solutions. Write robust unit tests with Jest and contribute to code quality standards. Contribute to modern frontend workflows, including npm, CI/CD pipelines (GitLab). Support backend integration using Java or Python (exposure welcome). Participate actively in UI design discussions to align with UX principles. Maintain and improve existing systems, ensuring low latency and high-volume trading efficiency. You're ideal for this role if you have: Minimum 4 years of commercial frontend development experience. Strong proficiency in React JS, JavaScript, and modern CSS. Sound understanding of design patterns and best programming practices. Experience with Jest testing framework. Working knowledge of CI/CD processes and tools (GitLab). Basic backend knowledge in Java or Python is a plus. It is a strong plus if you have: (optional) Experience with Ag-Grid library. Knowledge of good UX principles. Certifications or additional training in frontend technologies. Language Required for the role: Fluent English. Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.
Technology
emagine Polska
Senior .NET Developer (Banking) – Remote (Poland)
Senior
Remote
Warsaw, Poland
🏢 Summary: Senior .NET Developer role focused on designing, extending, and modernising critical banking and securities systems in a fully remote B2B model. The position involves full-stack development, system integration, and cloud scaling within distributed, business-critical environments. The role requires close collaboration with business stakeholders and ownership of end-to-end application delivery. 🗂️ Requirements: 5+ years experience as .NET / C# Developer, Experience in banking or investment banking sector, Full-stack development experience, Knowledge of SOLID design principles, Experience with document-based databases, Experience with event-driven messaging frameworks, Experience with unit and integration testing, End-to-end application development experience, Ability to work during UK business hours, Based in Poland 📃 Skills: .NET, C#, MongoDB, SOLID, Messaging, UnitTesting, IntegrationTesting, Docker, Kubernetes, Cloud 🏢 Description: Work model: 100% remote (candidates must be based in Poland) Contract type: B2B Industry: Banking / Investment Banking We are looking for an experienced Senior .NET Developer to join a distributed engineering team working on critical banking systems. The role focuses on extending and modernising applications used across securities and banking operations, with a strong emphasis on system design, scalability, and cloud transformation. You will work end-to-end on business-critical systems, closely collaborating with Business Analysts, without a separate QA team. A solid background in banking or financial services is essential. Main Responsibilities: Design, develop, and extend .NET-based systems supporting multiple banking entities Contribute to the integration of securities and core banking platforms Support and enhance a portfolio of ~17 applications across product control and risk management Work with an in-house development framework in a full-stack capacity Participate in scaling applications for cloud-based, containerized environments Collaborate closely with business stakeholders to deliver robust solutions Ensure high code quality through unit and integration testing Key Requirements: 5+ years of professional experience as a .NET / C# Developer Hands-on experience in the banking or investment banking sector (mandatory) Full-stack development experience (backend-focused, frontend included) Strong understanding and practical application of SOLID design principles Experience with document-based databases (e.g. MongoDB) Experience with event-driven / event-based messaging frameworks Solid knowledge of unit and integration testing Experience working end-to-end on applications (development, testing, support) Ability to work independently in a fast-paced, regulated environment Availability during UK business hours Nice to Have: Experience with cloud platforms and application migration to cloud Experience with container technologies (e.g. Docker, Kubernetes) Exposure to systems such as Murex or large in-house banking platforms Background in securities, risk, or product control systems Other Details: This role is 100% remote with candidates required to be located in Poland. The contract is on a B2B basis within the banking and investment banking industry.
Technology
emagine Polska
Senior .NET Developer (Banking) – Remote (Poland)
Senior
Remote
Warsaw, Poland
🏢 Summary: Senior .NET Developer role focused on designing, extending, and modernizing critical banking systems within securities and core banking domains. The position involves full-stack development, system integration, and cloud scaling in a distributed team without a separate QA function. Work includes end-to-end ownership of business-critical applications in a regulated investment banking environment. 🗂️ Requirements: 5+ years experience with .NET and C#, Hands-on experience in banking or investment banking, Full-stack development experience, Strong knowledge of SOLID principles, Experience with document-based databases, Experience with event-driven messaging frameworks, Knowledge of unit and integration testing, End-to-end application development experience, Ability to work independently in regulated environments, Availability during UK business hours, Poland-based residency 📃 Skills: .NET, C#, MongoDB, SQL, REST, Microservices, Docker, Kubernetes, Azure, UnitTesting, IntegrationTesting, EventDriven, Git 🏢 Description: Work model: 100% remote (candidates must be based in Poland) Contract type: B2B Industry: Banking / Investment Banking We are looking for an experienced Senior .NET Developer to join a distributed engineering team working on critical banking systems. The role focuses on extending and modernising applications used across securities and banking operations, with a strong emphasis on system design, scalability, and cloud transformation. You will work end-to-end on business-critical systems, closely collaborating with Business Analysts, without a separate QA team. A solid background in banking or financial services is essential. Main Responsibilities: Design, develop, and extend .NET-based systems supporting multiple banking entities Contribute to the integration of securities and core banking platforms Support and enhance a portfolio of ~17 applications across product control and risk management Work with an in-house development framework in a full-stack capacity Participate in scaling applications for cloud-based, containerized environments Collaborate closely with business stakeholders to deliver robust solutions Ensure high code quality through unit and integration testing Key Requirements: 5+ years of professional experience as a .NET / C# Developer Hands-on experience in the banking or investment banking sector (mandatory) Full-stack development experience (backend-focused, frontend included) Strong understanding and practical application of SOLID design principles Experience with document-based databases (e.g. MongoDB) Experience with event-driven / event-based messaging frameworks Solid knowledge of unit and integration testing Experience working end-to-end on applications (development, testing, support) Ability to work independently in a fast-paced, regulated environment Availability during UK business hours Nice to Have: Experience with cloud platforms and application migration to cloud Experience with container technologies (e.g. Docker, Kubernetes) Exposure to systems such as Murex or large in-house banking platforms Background in securities, risk, or product control systems Other Details: This role is 100% remote with candidates required to be located in Poland. The contract is on a B2B basis within the banking and investment banking industry.
Technology
Caspian One
Java Developer | FX & Commodities Trading Platform |
Senior
Remote
2,100 - 2,500 PLN
🏢 Summary: Senior Java Engineer role focused on building and rewriting a low‑latency FX & Commodities Risk platform for a global investment bank. The position involves developing high‑performance, distributed backend systems supporting real‑time risk calculations across trading desks. This is a backend‑heavy role centered on multithreading, event streaming, and scalable data processing in a financial environment. 🗂️ Requirements: Financial services experience (FX Risk or trading systems), Strong Core Java expertise, Experience with Spring or Spring Boot, Knowledge of multithreading and concurrency, Experience building low-latency systems, Experience with distributed systems, Hands-on experience with Kafka or similar messaging systems, Experience with Hazelcast or distributed caching solutions, Experience with modern data stores (e.g., ClickHouse), Ability to work with complex legacy systems, Backend development experience in high-performance environments 📃 Skills: Java, CoreJava, Spring, SpringBoot, Kafka, Hazelcast, ClickHouse, Multithreading, Concurrency, LowLatency, DistributedSystems, JVM, WPF, C#, Haskell 🏢 Description: ** CANDIDATES MUST HAVE FINANCIAL EXPERIENCE ** Java Engineer – FX & Commodities Risk Platform Global Investment Bank | Low‑Latency Systems | B2B | Remote | Rate: 2100PLN + | Must have Financial Experience A global investment bank is expanding its FX & Commodities Risk engineering team and is hiring a Senior Java Engineer in Poland to help build a next‑generation risk platform used by trading desks in London, Singapore, and New York. This is a rare opportunity to work on a brand‑new system rewrite while learning from a complex, high‑performance legacy platform that has powered global trading for years. What We’re Looking For Strong experience with Core Java and Spring Solid understanding of multithreading, concurrency, and low‑latency systems Experience with Kafka, Hazelcast, or similar distributed technologies Familiarity with modern data stores (ClickHouse is a plus) Ability to learn from and navigate complex legacy systems Proactive mindset — someone who can drive development forward Strong communication and collaboration skills FX Risk or broader trading‑systems experience is a strong plus About the Platform The FX & Commodities Risk Platform provides real‑time risk calculations and reporting across multiple asset classes. The current system includes: Frontend: WPF (C#) Backend: Java (Core Java, Spring) Quant Library: In‑house, with Haskell used for interaction A full rewrite is underway, moving the platform to a modern, scalable architecture. What You’ll Work On You’ll play a key role in building the new platform, which is moving towards: Spring Boot Kafka for event streaming Hazelcast for distributed caching and computing ClickHouse for high‑performance data storage and reporting Key Engineering Focus Areas High‑performance multithreading & concurrency Low‑latency backend development Distributed systems using Kafka and Hazelcast Data‑intensive workloads using ClickHouse Interacting with the quant library (light Haskell exposure) Learning from the legacy system’s memory‑optimised design (critical for JVM stability) This is a backend‑heavy role with deep engineering challenges.
Technology
Capco Poland
Lead Software Engineer (.NET, WPF) (She/ He/ They)
Senior
Remote
Warsaw, Poland
🏢 Summary: Lead Software Engineer role focused on building and enhancing a strategic risk and P&L platform for Financial Markets within an investment banking environment. The position involves designing and developing scalable, robust, and fault-tolerant rich desktop applications using modern engineering practices. The role also includes ownership of high-quality code delivery, test automation, and production support in an Agile setup. 🗂️ Requirements: 12+ years of C# development experience, Strong experience with WPF and .NET for rich desktop applications, Experience in investment banking IT, Experience with multithreading and asynchronous programming, Experience with MVVM architecture, Experience with Dependency Injection, Experience with REST APIs and message queues, Experience with unit testing and test-driven development, Experience with CI/CD pipelines, Experience working in Agile/Scrum teams, Poland-based candidate 📃 Skills: C#, WPF, .NET, TPL, Rx, MVVM, Prism, Unity, LINQ, REST, ActiveMQ, DevExpress, Infragistics, OOP, NUnit, Moq, TDD, BDD, UIAutomation, AzureDevOps, CICD, Agile, Scrum, VisualStudio, ReSharper 🏢 Description: *We are looking for Poland based candidate. At Capco Poland, we’re not just another consultancy - we’re the spark behind digital transformation in the financial world. As a global leader in technology and management consulting, we thrive on helping clients tackle the toughest challenges across banking, payments, capital markets, wealth, and asset management. PROJECT OVERWIEW: The team is working on Client's strategic risk and Profit and Loss platform for Financial Markets. The development team is a world class technology group in the bank to provide technical solutions to support the bank’s Financial Markets business as well as support requirements from other projects with a wider scope such as regulatory books of work. We bring a deep understanding of the market, a scientific approach, and innovative technologies to bear on the challenges of profitable trading in the world's highly competitive environment. ROLE OVERVIEW: We're looking for a Lead Software Engineer who will play a strategic role in the implementation of highly visible strategic programs with the primary responsibilities around building components within the risk platform. Any developed solution must be scalable, robust and fault tolerant catering to the existing and future business needs in a timely manner. In addition, they will be expected to develop innovative solutions with a view to these being released quickly to gain feedback before advising on the full scale roll out. KEY RESPONSIBILITIES: Working closely with the Development Manager, Project Manager, and a team of developers to deliver quality features and enhancements to the internal business users. Writing robust code along with a high-level of test coverage. Designing smart and scalable solutions following the bank standards. Developing, preparing and maintaining system documentation, including program descriptions and operational procedures. Acting as the second line of support during production problems. REQUIRED SKILLS & QUALIFICATIONS: 12+ years of C#/WPF/.NET development experience building performance critical rich desktop applications Hands on experience within investment banking IT Strong knowledge and experience of working in Agile teams with Agile practices Good judgement and decision-making skills with a pragmatic and common-sense approach to solving problems Strong problem-solving and analytical skills Excellent communication and interpersonal skills, with the ability to build and maintain relationships with all stakeholders Ability to work in a fast-paced front-office environment Ability to prioritize and work on multiple workstreams simultaneously Ability to take ownership of issues and projects, and see them through to delivery TECHNICAL COMPETENCIES: C#/ WPF/ .NET development of rich desktop applications Multithreaded, concurrent, and asynchronous programming using TPL and Rx MVVM frameworks, preferably Prism Dependency Injection containers, preferably Unity LINQ/Rx with a functional mindset and coding style RESTful APIs and message queues such as ActiveMQ DevExpress, Infragistics, or any other popular WPF component library Object-Oriented Design and Programming (OOD/OOP) NUnit, Moq, TDD, BDD, UI Automation CI/CD Pipelines such as Azure DevOps Agile/Scrum practices Visual Studio and ReSharper We offer a flexible collaboration model based on a B2B contract, with the opportunity to work on diverse projects. RECRUITMENT PROCESS: HR interview with the recruiter Technical interview with Capco Engineering team Client interview Feedback and offer