Full Stack Engineer - JavaScript / C#

Marmion; Hull and East Yorkshire; Hybrid; GBP 54,000 - 66,000; Full time

Benefits offered by this job

Free on-site Gym

Cycle to Work Scheme

Regular Social Events

Job summary

Marmion is seeking a hands-on Senior Full Stack Engineer in Hull to influence technical direction and modernise legacy systems. You will build enterprise-scale applications, work on cloud integrations and AI-enabled solutions, and mentor junior developers.

Key tech includes JavaScript, TypeScript, Node.js, C#, and .NET with SQL Server and PostgreSQL. The role offers hybrid working, a competitive salary up to £60,000 and several staff perks.

Qualifications

• Strong JavaScript and TypeScript experience.
• Significant C#/.NET development background.
• Experience building and supporting web applications.
• Understanding of frontend and backend architecture.

Responsibilities

• 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.

Skills

JavaScript

TypeScript

C#

NET

Tools

Azure

Docker

Kubernetes

Vite

KOA

Job description

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)
• Up to £60,000 per annum, negotiable dependent on experience
• Free on-site Gym, Cycle to Work Scheme, Regular Social Events

Key roles & responsibilities:

• 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.

Tech Stack

Core: JavaScript, TypeScript, Node.js, C#, .NET

Databases: SQL Server, PostgreSQL

Desirable: Azure, Docker, Kubernetes, Vite, KOA, Modern JavaScript frameworks

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:

• Solid JavaScript and TypeScript skills.
• 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.

Thank you for your interest. We carefully review every CV and will contact shortlisted applicants by phone or email. If you don't hear from us within 5 working days, unfortunately your application hasn't been successful on this occasion.