Senior C# Engineer (PremierOne Computer Aided Dispatch)

🏢 Summary: Senior Back End Developer role focused on building and leading mission-critical emergency-response software using C# and .NET. The primarily remote position requires weekly work from the Krakow office and includes architecture design, technical leadership, and mentoring within an Agile team. 🗂️ Requirements: 5+ years of .NET-focused software development experience, Entity Framework experience, Familiarity with ASP.NET, Web API, SignalR, WCF and WinForms, Familiarity with SIP, FreeSWITCH, Redis, Git, Jenkins, C/C++ and CI/CD, Experience with NUnit/Moq, Selenium or Jasmine/Karma, Practical JavaScript, HTML5 and CSS3 knowledge, Security knowledge, Agile and Scrum knowledge, Strong analytical and problem-solving skills, Weekly work from the Krakow office 📃 Skills: C#, .NET, Angular, EntityFramework, ASP.NET, WebAPI, SignalR, WCF, WinForms, SIP, FreeSWITCH, Redis, Git, Jenkins, C/C++, CI/CD, NUnit, Moq, Selenium, Jasmine, Karma, JavaScript, HTML5, CSS3, Agile, Scrum 🏢 Description: Guardian Integrated Communications Control System (ICCS) provides the backbone for emergency response in the UK & Europe. Our applications help 999 operators respond to calls from the public and dispatch out nearby responders, enabling the right response when every second counts. As our solution has grown from a small startup to one of the leading offerings for Fire & Police agencies, our customers now trust us to solve more of their problems. We are building new products to increase the safety and efficiency of emergency response agencies, and ultimately to help our customers save lives. We are seeking an experienced Senior Back End Developer with .NET expertise to join our agile engineering team. You will be responsible for leading the development of mission critical or supporting software solutions that meet business requirements, as well as designing and implementing architectures that support these solutions to a high standard, while taking into account product’s efficiency and speed. Our solution is written in C# & .NET (both .NET and .NET Framework) with Angular on the UI side and Entity Framework to handle database operations. This role is primarily remote with working from our Krakow office once per week. Responsibilities: Lead the development of software solutions, ensuring that they meet business requirements and are delivered on time and within budget. Design and implement architectures that support software solutions, ensuring that they are scalable, reliable, and secure. Work closely with business stakeholders and project managers to gather requirements and develop specifications for software solutions. Mentor junior developers and provide technical guidance and support to the development team. We are looking for someone who has: Minimum of 5 years of experience in software development, with a focus on .NET-centric solutions. Strong database skills are welcome, including experience with MS SQL, PostgreSQL and MariaDB databases. Experience with Entity Framework (EF). Familiarity with following technologies: ASP.NET , Web API, SignalR, WCF, WinForms Familiarity with other protocols, tools, systems and languages: SIP, FreeSWITCH, Redis, Git, Jenkins, C/C++, Git , CI/CD Used testing frameworks such as: NUnit/Moq, Selenium, Jasmine/Karma Practical knowledge of: JavaScript, HTML5/CSS3, AngularJS / Angular 2+ is welcome Knowledge of security aspects. Knowledge of software development methodologies, such as Agile and Scrum. Strong analytical and problem-solving skills. In return for your expertise, we’ll support you in this new challenge with coaching & development every step of the way. Also, to reward your hard work you’ll get: Yearly salary increase (depends on individual performance) Yearly bonus (depends on company performance) private medical & dental coverage, life insurance, Employee Stock Purchase Plan, Employee Pension Plan, IP Tax Relief flexible working hours (usually day start between 7-10), 8 hours working day (30 minutes lunch break included) strong collaborative culture, comfortable work conditions (high-class offices, parking space, possibility remote work), volleyball field and grill place next to the office, lots of sports activities as Moto football league, Wakeboarding, Snowboarding, e-gaming league etc. access to wellness facilities and integration events, training and broad development opportunities.

🏢 Summary: Senior C# Developer role building and evolving high-performance .NET services for XVA, liquidity, and cash-forecasting workflows. The position focuses on migrating back-end systems to an event-driven architecture, applying DevOps practices and enterprise LLM/agentic AI, while providing technical leadership in a distributed agile team. 🗂️ Requirements: 5+ years of C#/.NET experience, Windows Services, ASP.NET Web API, and SignalR experience, Object-oriented programming, design patterns, and SOLID principles, Service-oriented architecture and asynchronous messaging with Rebus, Advanced MS SQL knowledge, Git/Bitbucket, TeamCity/Jenkins, and Ansible experience, ORM experience, including Dapper, Version-controlled build pipeline experience, Practical enterprise agentic AI engineering experience, Understanding of LLM use in software development, English proficiency at C1 level 📃 Skills: C#, .NET, WindowsServices, ASP.NET, WebAPI, SignalR, OOP, SOLID, Rebus, SQL, Git, Bitbucket, TeamCity, Jenkins, Ansible, Dapper, LLMs, AI, HTML, JavaScript, TypeScript, React, Redux 🏢 Description: Description & Requirements We are seeking a Senior C# Developer to join the Non‑Linear IT team within Global Markets IT. The team builds and maintains the core applications that support XVA, liquidity, and financial‑resource management. You will work in an agile, collaborative environment in team distributed between London, Paris and Kraków, delivering clean, maintainable code while helping migrate our back‑end services to a modern event‑driven architecture. Senior C# Developer Responsibilities: Design, develop, and evolve high‑performance C#/.NET services that power XVA, liquidity and cash‑forecasting workflows. Contribute to the migration to a modern, event‑driven architecture. Implement asynchronous, message driven communication using Rebus and ensure data integrity Participate in full‑cycle DevOps processes: source control (Bitbucket/GIT), CI/CD pipelines (TeamCity, Jenkins), and configuration management (Ansible). Apply knowledge of Large Language Models (LLMs) and agentic AI to improve coding efficiency, code review, and automated testing within an enterprise setting. Provide technical mentorship, conduct code reviews, and champion best‑practice patterns (OO design, SOLID, clean architecture). Deliver high‑quality software under tight deadlines while maintaining attention to detail and robust documentation. Requirements: 5+ years of professional experience with C#/.NET (Windows Services, ASP.NET Web API, SignalR). Strong command of Object‑Oriented Programming, design patterns, and SOLID principles. Proven experience with service‑oriented architectures and asynchronous messaging (Rebus). Advanced knowledge of MS SQL and hands‑on with DevOps tools: Git/Bitbucket, TeamCity/Jenkins, Ansible. Familiarity with ORM libraries (e.g., Dapper) and version‑controlled build pipelines. Understanding of the capabilities of LLM's in the software development process with practical experience of agentic AI engineering in an enterprise environment. Excellent communication skills in English (C1) Nice‑to‑Have: Front‑end development experience with HTML, JavaScript/TypeScript, React, Redux. Financial domain knowledge: Financial products (Listed / OTC) PnL Explain, risks (Delta, Gamma, Theta, Vega) XVA (CVA, FVA, ColVA) Liquidity Risk (RNFB, NSFR) Cash Forecasting Balance Sheet Metrics (Leverage Exposure) Pre-trade calculation and booking workflow We offer: Equivalent for remote work expenses (120 PLN per month) Stable employment in the international company Fully paid private medical care for employee Pre-paid lunch card Employee Pension Plan Co-financed Multisport Card Life insurance Car parking availability in the office building Trainings and development opportunities We invite you to apply with your resume in English.

🏢 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 naszego 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 Software Engineer role building enterprise digital platforms for the pharmaceutical and life sciences sector. The position covers full-stack, cloud-native development, architecture influence, API design, CI/CD, quality automation, and platform reliability in an international agile team. 🗂️ Requirements: 5+ years of professional software development experience, Strong .NET/ASP.NET Core and/or Python experience, REST API development experience, Vue 3 and TypeScript experience, Azure or AWS cloud platform experience, CI/CD, automated testing, and DevOps knowledge, Software architecture and scalable solution design knowledge, Fluent written and spoken English 📃 Skills: .NET, ASP.NET, Python, Vue, TypeScript, REST, Azure, AWS, GitHub, Vitest, Allure, MSAL, CI/CD, DevOps 🏢 Description: We’re looking for an experienced Senior Software Engineer to join a global product team within the pharmaceutical and life sciences industry. This is a chance to work on modern, enterprise-grade digital platforms where software engineering meets science and real-world business impact. You’ll have the opportunity to influence architecture, contribute to technical decisions, and build solutions that matter while working in a truly international, agile environment. Quick Facts • Global, remote collaboration with colleagues and stakeholders across an international product organisation • Digital platforms supporting research, clinical development, and scientific decision-making • Cloud-native development, modern frontend technologies, automation, CI/CD, and a strong focus on quality • Cross-functional agile collaboration with engineers, architects, Product Owners, and business experts What you’ll work on As a Senior Software Engineer, you’ll be involved across the full software development lifecycle—from designing scalable solutions and APIs to delivering modern user-facing functionality. Responsibilities • Design and implement scalable backend services and REST APIs • Develop modern web applications and intuitive user-facing functionality • Contribute to system architecture and technical decision-making • Design and implement cloud-native solutions • Build and improve CI/CD pipelines and automated deployments • Ensure software quality through automated testing and code reviews • Work closely with Product Owners, architects, engineers, and business stakeholders • Support platform reliability, observability, and operational excellence • Contribute to an agile, collaborative engineering culture Technology stack • ASP.NET Core / .NET 10 • Vue 3 – Composition API • TypeScript • REST APIs • Python and/or .NET • Azure / AWS • GitHub Actions & CI/CD • Vitest & Vue Test Utils • Allure reporting • Microsoft Identity / Azure MSAL Browser What we’re looking for • 5+ years of professional software development experience • Ability to take ownership of technical solutions • Strong experience with .NET / ASP.NET Core and/or Python • Hands-on experience building REST APIs • Solid frontend experience with Vue 3 and TypeScript • Experience with cloud platforms, preferably Azure or AWS • Practical knowledge of CI/CD, automated testing, and DevOps practices • Strong understanding of software architecture and scalable solution design • Excellent communication and stakeholder management skills • Experience working in regulated environments is a strong advantage • Fluent English, both written and spoken Why this opportunity? • Work globally and remotely with colleagues and stakeholders across an international product organisation • Build technology that contributes to digital platforms supporting research, clinical development, and scientific decision-making • Influence architecture, engineering practices, and technical direction • Work in a modern engineering environment with cloud-native development, frontend technologies, automation, CI/CD, and a focus on quality • Collaborate cross-functionally with experienced engineers, architects, Product Owners, and business experts in an agile setup