Full-Stack Software Developer

Harnham; Greater London; On-site; GBP 70,000 - 100,000; Full time

Job summary

Harnham is seeking a Full-Stack Software Developer to join our London team to build and enhance high-performance C#/.NET applications. You will work on greenfield projects, real-time data systems, and complex engineering challenges in a fast-paced, data-driven environment.

You will own projects from design to delivery, shape system architecture, optimize performance, and collaborate with cross-functional engineers across multiple concurrent initiatives. 5 days a week in the office.

Qualifications

• Strong commercial experience with C# and .NET.
• Experience building backend systems and full stack applications.
• Solid understanding of software engineering fundamentals and best practices.
• Experience with relational databases such as SQL Server or similar.
• Ability to communicate technical concepts clearly and effectively.
• Proactive approach to learning and professional development.
• Interest in sports and understanding of how major sports are played and structured.

Responsibilities

• 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

C#/.NET

Backend development

Software engineering fundamentals

SQL Server

Communication

Learning agility

Sports interest

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