Senior Full Stack Engineer - JavaScript / C#

This is a hands‑on role for an experienced engineer who enjoys solving complex technical challenges, influencing architecture decisions, and working across both backend and frontend technologies. You'll play a key role in helping modernise existing systems, supporting the migration of legacy applications, and contributing to the development of new enterprise‑scale platforms and web applications.

• Hull (office-based with flexibility for hybrid working)
• Free on-site Gym, Cycle to Work Scheme, Regular Social Events

The Opportunity

We’re searching for a Senior Full Stack Engineer to join a growing internal technology function across a multi-site group.

• Designing, developing and supporting enterprise applications across backend and frontend technologies.
• Helping to standardise and modernise an evolving technology estate.
• Migrating and enhancing existing applications and platforms.
• Developing and maintaining large-scale web applications and customer-facing portals.
• Supporting integrations between business systems and web applications.
• Working across databases, APIs and enterprise platforms.
• Collaborating with developers across multiple technology stacks.
• Providing technical leadership and guiding less experienced engineers where required.
• Supporting ongoing innovation projects, including AI-enabled solutions and modern application development initiatives.
• Contributing to system architecture, technical design and engineering best practice.

The successful candidate will have experience across a combination of the following technologies:

Core Technologies:

• TypeScript
• Node.js
• C#
• .NET

Databases:

• SQL Server
• Docker
• Vite
• KOA

We're looking for an engineer who can demonstrate:

• Strong commercial experience with C# development.
• Experience building and supporting web applications.
• Understanding of both frontend and backend application architecture.
• Experience working with APIs, integrations and databases.
• The ability to operate across a varied technology landscape.
• Strong problem-solving and technical decision-making skills.
• A collaborative approach and willingness to mentor and support colleagues.
• A passion for continuous improvement and modern software engineering practices.

What's in it for You?

• Opportunity to influence technical direction and architecture.
• Exposure to diverse, business-critical projects.
• Opportunity to work with modern cloud, web and integration technologies.
• Scope for growth and progression within an expanding technology function.