Senior .NET Lead Developer

Synechron is looking for a hands-on Senior .NET Developer to join our technology team, delivering high-quality C#/.NET solutions across a range of business-critical enterprise platforms
. The role also involves leadership and mentorship to a wider team.

This is an exciting opportunity to contribute to a growing technology estate, supporting new product onboarding, methodology changes, platform enhancements and greenfield development
.

You’ll work on enterprise-grade applications, APIs, batch services and integrations, helping to deliver robust, secure and production-ready technology in a controlled environment.

• Design, build and maintain C# / .NET applications
  , REST APIs, services, batch jobs and reusable platform components
• Develop and implement shared libraries, templates, orchestration, configuration and operational dashboard components
• Integrate with MongoDB, SQL Server, data warehouse platforms, enterprise data sources and messaging technologies
• Support platform modernisation through container-ready application design, deployment readiness, service improvement and technical debt reduction
• Use AI-assisted development tools responsibly to improve coding productivity, automate test generation, support refactoring, enhance documentation and improve pull request quality
• Take part in code reviews, technical design discussions, sprint planning, estimation, defect resolution and release readiness
• Write robust unit, integration and regression tests
  , and support UAT, production verification, cutover activities and early-life support
• Collaborate closely with senior engineers, delivery managers, support teams and business stakeholders to deliver controlled, supportable change

• Strong hands-on experience in C# / .NET development within enterprise or production-facing environments
• Good knowledge of .NET Framework, .NET Core / modern .NET
  , object-oriented programming,
  SOLID principles and common design patterns
• Strong SQL skills, including query optimisation, stored procedures, data modelling awareness and database integration
• Experience with MongoDB or similar document databases, including querying, indexing and performance optimisation
• Proven experience building REST APIs, service integrations and event/message-driven systems
• Experience with Git, CI/CD tooling, package management tools, workflow tracking tools and controlled release processes
• Working knowledge of AI-assisted software development practices
  , including prompt-driven coding support, test generation, refactoring assistance and documentation automation
• Strong focus on clean code, testing, security, maintainability and production supportability
• Exposure to container platforms and orchestration technologies
• Experience in financial services
  , regulated environments or other complex enterprise settings
• Experience with messaging platforms

Multi year long term rolling contract
- Hybrid working x3 days a weeks
- Strong market rates

Synechron are proud to be an equal opportunity employer. Our Diversity, Equity, and Inclusion (DEI) initiative ‘Same Difference’ is committed to fostering an inclusive culture – promoting equality, diversity and an environment that is respectful to all. We encourage applicants from across diverse backgrounds, race, ethnicities, religion, age, marital status, gender, sexual orientations, or disabilities to apply. We offer flexible workplace arrangements, mentoring, internal mobility, learning and development programmes to support our global workforce.

Empowerment and collaboration are at the core of how we operate.

All employment decisions at Synechron are based on business needs, job requirements and individual qualifications, without regard to the applicant’s gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law.