Full-Stack Software Developer

Company: Harnham
Apply for the Full-Stack Software Developer
Location: London
Job Description:

London (5 days a week in office – no flex)

This is an opportunity to join a highly technical engineering team building business-critical software in a fast-paced, data-driven environment. You’ll work on a mix of greenfield and existing applications, contribute to complex engineering challenges, and have genuine ownership over projects from design through to delivery.

THE COMPANY

They are a growing technology-led investment business that uses advanced analytics, automation, and software engineering to support decision-making in the Sports market. With a collaborative culture and flat structure, they have built a reputation for retaining talented engineers and providing an environment where people can make a meaningful impact. Their engineering team works closely with other areas of the business, creating software that directly influences performance and innovation.

THE ROLE

As a Full-Stack Software Developer, you will build and enhance high-performance C#/.NET applications, working across greenfield projects, real-time data systems, and complex engineering challenges.

Specifically, you can expect to be involved in the following:

  • Building and maintaining C# and .NET applications used across the business
  • Working on both greenfield development and enhancements to existing systems
  • Contributing to system architecture, design decisions, and performance optimization
  • Developing scalable solutions that process and manage large volumes of data
  • Collaborating with highly skilled engineers in a cross-functional environment
  • Taking ownership of projects and contribute ideas throughout the development lifecycle
  • Working on a variety of technical challenges across multiple concurrent initiatives

SKILLS AND EXPERIENCE

The successful Full-Stack Software Developer will have the following skills and experience:

  • Strong commercial experience with C# and .NET
  • Experience building backend systems and full stack applications
  • A solid understanding of software engineering fundamentals and best practices
  • Experience working with relational databases such as SQL Server or similar
  • The ability to communicate technical concepts clearly and effectively
  • A proactive approach to learning and professional development
  • An interest in sports and a general understanding of how major sports are played and structured

BENEFITS

The successful Full-Stack Software Developer will receive the following benefits:

  • Salary between £70,000 – £100,000 – depending on experience

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Posted: September 21st, 2026