Senior/Lead Full Stack Engineer

About the role

We are looking for a Senior/Lead Full Stack Engineer to build and scale core capabilities of an enterprise DEX platform trusted by large enterprise customers, working across C#/.NET on the backend and React with TypeScript on the frontend. You will design APIs, build high-availability database systems, deliver accessible and performant user interfaces, and mentor junior engineers across both disciplines. The role expects active use of AI-assisted development tools such as GitHub Copilot as part of the daily engineering workflow.

What you will do

• Build, enhance, and scale core platform capabilities in C#/.NET;
• Define architecture, design, and develop new backend features and services;
• Design and implement common APIs following architecture guidelines and best practices;
• Design and build high-availability, high-quality database systems;
• Optimize performance, reliability, and scalability using modern tooling and techniques;
• Monitor core platform performance and proactively propose improvements;
• Ensure backend solutions are secure, stable, scalable, and efficient;
• Develop responsive, accessible, and high-performing user interfaces using React and TypeScript;
• Collaborate closely with UX/UI designers to translate designs into production-ready implementation;
• Integrate front-end applications with REST/GraphQL APIs, collaborating on API contract design;
• Maintain front-end quality through testing, reviews, and best practices;
• Work independently on solutions and be accountable for time and quality commitments;
• Participate actively in sprint planning, technical design discussions, and continuous improvement initiatives;
• Coach and mentor junior engineers across backend and front-end disciplines;
• Act as an advisor to product owners on technical feasibility and delivery estimates;
• Communicate with customers to analyze and resolve product defects or support major implementations;
• Stay up to date with developments across cloud, backend, front-end, and AI-assisted engineering.

Must haves

• 6+ years of professional software development experience;
• Strong expertise in .NET (C#) and SQL, with a focus on backend/API development;
• Commercial experience with modern UI frameworks, such as React, Angular and VueJs;
• Experience with GitHub Copilot or similar AI developer tools;
• Solid knowledge of TypeScript and modern JavaScript (ES6+);
• AI-empowered mindset: proven experience optimizing enterprise-level solutions with AI-assisted engineering;
• Experience designing and consuming REST and/or GraphQL APIs;
• Experience writing and maintaining automated tests (unit, integration, and/or UI);
• Strong understanding of Clean Code, SOLID principles, and design patterns;
• Experience working on distributed, cloud-based systems;
• Excellent debugging skills and strong root-cause analysis capabilities;
• Understanding of secure coding principles and best practices;
• Fluency in English;
• Experience with cloud native technologies;
• Experience delivering containerized solutions (Docker).

Nice to haves

• University degree in Computer Science, Engineering, or a related field;
• Experience with UI component libraries (such as MUI Base, MUI Core, Radix UI, etc.);
• Understanding of web accessibility standards (WCAG);
• Experience with observability platforms (e.g. DataDog) and structured logging;
• Exposure to CI/CD tooling such as Kustomize, ArgoCD;
• C++ language experience is a plus.