Senior Full Stack Developer .Net & React/Typescript

City, Leeds
Computer Futures

We are seeking an experienced Senior Full Stack Engineer to play a key role in the design, development, deployment and support of modern digital products and services. This is a hands-on senior engineering position that combines deep technical expertise with architectural leadership, mentoring and ownership of software delivery standards.

Working within a collaborative Agile environment, you will take responsibility for delivering scalable, secure and highly reliable solutions across both front-end and back-end technologies. You will drive engineering best practices, champion automation and quality, and help shape the technical direction of digital platforms and customer-facing applications.

This role offers the opportunity to influence architecture, improve engineering capability across the team and work closely with Product, Architecture, Security and Operations stakeholders to deliver high-quality software solutions.

Key Responsibilities

Software Development & Solution Delivery

• Design, develop and maintain high-quality applications and services using React, TypeScript and .NET/C#.
• Take ownership of complex technical solutions from initial design through to deployment and operational support.
• Deliver scalable, secure and maintainable code following modern engineering practices.
• Lead technical investigations, proof-of-concepts and prototyping activities.
• Own complex technical challenges and drive solutions across multiple systems and teams.
• Ensure software is designed with performance, resilience and long-term maintainability in mind.

Architecture & Technical Leadership

• Lead technical design discussions and contribute to strategic architectural decisions.
• Define service boundaries, API contracts, integration patterns and data flows.
• Promote modern software architecture principles, including modular design and domain-driven approaches.
• Work closely with Architecture teams to ensure alignment with technology standards and long-term roadmaps.
• Identify technical risks and recommend appropriate mitigation strategies.
• Influence the future direction of digital products and engineering practices.

Engineering Quality & Testing

• Champion a quality-first engineering culture.
• Define and implement testing strategies across applications and services.
• Promote Test-Driven Development (TDD) and automation-first approaches.
• Drive improvements in automated testing, including:
  • Unit Testing
  • Integration Testing
  • API Testing
  • Contract Testing
  • End-to-End/UI Testing
  • Performance Testing
• Ensure quality gates are embedded within deployment pipelines.
• Continuously improve software reliability, maintainability and code quality standards.

DevOps & Cloud Engineering

• Drive best practices across CI/CD pipelines and automated deployments.
• Implement and improve release strategies including feature flags and progressive delivery techniques.
• Ensure applications are built and deployed using secure and repeatable processes.
• Support cloud-native development principles and modern DevOps practices.
• Work within Azure-based environments and contribute to ongoing platform improvements.
• Promote automation across build, test and deployment activities.

Operational Support & Reliability

• Take ownership of the operational health of applications and services.
• Implement and improve observability through logging, monitoring, metrics and tracing.
• Lead incident investigation and resolution activities.
• Conduct post-incident reviews and ensure lessons learned are embedded into future development.
• Identify and resolve technical debt, defects and performance bottlenecks.
• Participate in an agreed out-of-hours support rota where required.

Mentoring & Team Development

• Provide technical leadership and support to engineers across the development team.
• Mentor and coach developers to improve technical capability and delivery practices.
• Lead code reviews and technical design reviews.
• Promote engineering best practices and continuous improvement.
• Share knowledge through technical workshops, communities of practice and team collaboration activities.
• Act as a senior technical point of contact within the wider engineering function.

Stakeholder Engagement

• Collaborate with Product Managers, Architects, QA Engineers, UX Designers, Security Specialists and Operations teams.
• Build strong relationships with stakeholders across technology and business functions.
• Communicate complex technical concepts clearly to both technical and non-technical audiences.
• Contribute to governance, risk, compliance and security discussions where required.
• Support the delivery of strategic technology initiatives and digital transformation programmes.

To find out more about Computer Futures please visit (url removed)

Computer Futures, a trading division of SThree Partnership LLP is acting as an Employment Business in relation to this vacancy Registered office 8 Bishopsgate, London, EC2N 4BQ, United Kingdom Partnership Number OC(phone number removed) England and Wales