Full Stack Engineer - JavaScript​/C#

We're searching for a hands‑on Senior Full Stack Engineer to help shape the future of technology across a growing multi‑site organisation.

This is an opportunity to influence technical direction, modernise legacy systems, build enterprise-scale applications, and work on exciting projects involving cloud technologies, integrations and AI-enabled solutions.

If you enjoy solving complex technical problems while remaining close to the code, we'd love to hear from you.

• Hull (office-based with flexibility for hybrid working)
• Free on-site Gym, Cycle to Work Scheme, Regular Social Events
• Developing enterprise applications and web platforms.
• Modernising and migrating existing systems.
• Building integrations, APIs and scalable solutions.
• Supporting and mentoring less experienced developers.
• Driving engineering best practice and innovation.
• Contributing to architecture and technical design.

You don't need experience with every technology listed. We're looking for an adaptable engineer who can work across both backend and frontend development.

We're looking for an engineer who can demonstrate:

• Strong commercial experience with C# development.
• Experience building and supporting web applications.
• Understanding of frontend and backend architecture.
• Experience working with APIs, integrations and databases.
• Strong problem-solving and technical decision-making skills.
• Collaborative approach and willingness to mentor colleagues.

For more on Marmion check out our 5
* reviews on Trustpilot & Google.