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Salary: 
£60,000
Location: Hull, Yorkshire & the Humber
Our Reference: MV13699
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Key Details

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.

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Contact Matt 
about this role.
07943 710 160
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Our Promise

Thank you for taking an interest in the role advertised. We'd like to confirm that each CV received is read thoroughly by a trained consultant; if your application is shortlisted then you will be contacted via telephone in the first instance. 

If we have not contacted you within 5 working days of your application, please understand that the CV received, and the information provided does not meet the requirements of the role. 

However, we endeavour to consider all applicants for future opportunities; should you wish to speak to the named consultant about your application, please contact us directly.

Senior Full Stack Engineer - JavaScript / C#

  • 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

The Opportunity

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

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.

Working closely with senior stakeholders and developers, you'll help shape the future technical direction of the business as they continue to transition towards a modern Microsoft-based backend environment combined with modern JavaScript web applications.

Key roles & 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.
  • 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.

Technology Stack

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

Core Technologies:

  • JavaScript
  • TypeScript
  • Node.js
  • C#
  • .NET

Databases:

  • PostgreSQL
  • SQL Server

Cloud & Infrastructure (Desirable)

  • Azure
  • Docker
  • Kubernetes

Web Technologies (Desirable)

  • Modern JavaScript frameworks
  • Vite
  • KOA

You won't be expected to have experience with every technology listed, but you should be comfortable working across both backend and frontend environments and be able to quickly adapt to different JavaScript frameworks and technologies.

We're looking for an engineer who can demonstrate:

  • Solid JavaScript and TypeScript capability.
  • 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.

If you have the required skills and experience, please apply today. Alternatively, for more information about the role, please contact Matt Pallister directly.

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

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