Senior Full-Stack Engineer (JS & C#) – Hybrid, Modern Platforms

Marmion Ltd; Hull and East Yorkshire; Hybrid; GBP 60,000 - 85,000; Full time

Benefits offered by this job

Free on-site Gym

Cycle to Work Scheme

Regular Social Events

Job summary

Marmion Ltd in Hull is seeking a Senior Full Stack Engineer to join a growing internal technology function across multiple sites. You will design, develop and support enterprise applications across backend and frontend technologies, helping standardise and modernise the technology estate.

The role involves migrating and enhancing existing applications, developing large-scale web portals, integrating business systems, and guiding colleagues through technical design and best practices.

Qualifications

• Strong commercial C# development experience.
• 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.

Responsibilities

• 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.
• 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.

Skills

C# development

Full stack

Architectural decisions

Mentoring

Problem solving

Tools

TypeScript

Node.js

.NET

SQL Server

Docker

Vite

KOA

Job description

Marmion Ltd in Hull is seeking a Senior Full Stack Engineer to join a growing internal technology function across multiple sites. You will design, develop and support enterprise applications across backend and frontend technologies, helping standardise and modernise the technology estate.

The role involves migrating and enhancing existing applications, developing large-scale web portals, integrating business systems, and guiding colleagues through technical design and best practices.