Full Stack Software Developer 197637

Harnham; Greater London; On-site; GBP 65,000 - 85,000; Full time

Benefits offered by this job

Performance-related bonus

Private healthcare

Pension

Exposure to complex engineering/challl

Collaborative environment

Career growth opportunities

Central London office with flexible on

Job summary

Harnham in London is seeking a C# Full Stack Engineer to design, build and maintain applications using C# and .NET, with a mix of greenfield and existing systems. You will contribute to architecture, optimise performance, and own projects from design through deployment, collaborating with engineers and stakeholders across the business.

The role offers a collaborative, low-hierarchy environment and clear opportunities for career progression, with an office-based setup in Central London, plus

Qualifications

• Strong C# and .NET development experience.
• Solid understanding of software engineering fundamentals and best practices.
• Experience with SQL databases and data-driven applications.
• Write clean, maintainable, and efficient code.
• Strong problem-solving and communication skills.
• Demonstrable interest in continuous learning and technical development.
• Multi-threaded and performance-focused application development.
• Version control with Git.
• Distributed systems or network programming experience.
• Computer Science or related STEM education.

Responsibilities

• Design, build, and maintain applications using C# and .NET.
• Work on a combination of greenfield development and existing systems.
• Contribute to system architecture and technical decision-making.
• Develop scalable, high-performance software solutions.
• Collaborate closely with engineers and stakeholders across the business.
• Support performance optimisation and continuous improvement initiatives.
• Take ownership of projects from design through to deployment.

Skills

C# development

.NET

SQL databases

Clean code

Problem solving

Communication

Continuous learning

Multi-threaded

Distributed systems

Education

Computer Science or STEM education

Tools

Git

Job description

This is an opportunity to join a highly technical engineering team working on complex, performance-driven software in a fast-paced environment. You'll have the chance to take ownership of impactful projects, influence technical direction, and collaborate with experienced engineers who value high-quality software development.

The Company

They are a growing technology-focused business that develops proprietary platforms and automated systems to support data-driven decision making. With a flat structure and collaborative culture, they provide engineers with significant autonomy and direct involvement in key projects.

The business has grown steadily while maintaining strong employee retention and a supportive working environment. Technology plays a central role in their success, creating excellent opportunities for engineers who enjoy solving challenging technical problems.

The Role

As a C# Full Stack Engineer, you will:

• Design, build, and maintain applications using C# and .NET
• Work on a combination of greenfield development and existing systems
• Contribute to system architecture and technical decision-making
• Develop scalable, high-performance software solutions
• Collaborate closely with engineers and stakeholders across the business
• Support performance optimisation and continuous improvement initiatives
• Take ownership of projects from design through to deployment

Your Skills & Experience

• Strong commercial experience with C# and .NET development
• Solid understanding of software engineering fundamentals and best practices
• Experience working with SQL databases and data-driven applications
• Ability to write clean, maintainable, and efficient code
• Strong problem-solving and communication skills
• Demonstrable interest in continuous learning and technical development
• Multi-threaded and performance-focused application development
• Version control tools such as Git
• Distributed systems or network programming experience
• Computer Science or related STEM education

What They Offer

• Performance-related bonus with strong earning potential
• Private healthcare and pension
• Exposure to complex engineering challenges and large-scale projects
• A collaborative, low-hierarchy environment with genuine ownership
• Clear opportunities for career growth and progression
• Office-based role in Central London with flexibility available after onboarding