Back End Developer Jobs in UK 2026

Backend engineering continues to remain one of the most influential areas of modern software development as companies build scalable products and intelligent digital platforms. This Senior Backend Software Engineer opportunity in London offers experienced engineers the chance to join a fast-growing startup backed by major European investment while contributing directly to product growth and technical innovation. The role also includes Skilled Worker visa sponsorship for eligible international candidates.

The Senior Backend Software Engineer position focuses on designing, building, and scaling backend systems that power customer-facing products. The successful candidate will work across the full product lifecycle, from architecture and implementation through deployment and continuous improvement. This role offers significant ownership and autonomy while allowing engineers to shape technical decisions and product outcomes.

The hiring company is a London-based startup that recently secured Series A funding from one of Europe's leading venture capital firms. The organisation is expanding rapidly and building a team of product-oriented engineers focused on delivering meaningful technology solutions. Their culture emphasises collaboration, curiosity, rapid learning, and ownership while maintaining a high-performance environment.

• Design and develop scalable backend systems supporting production applications.
• Build and deliver new product features from concept through deployment.
• Collaborate closely with engineering and product teams to solve customer problems.
• Contribute to architecture decisions and long-term platform development.
• Maintain and improve system performance, reliability, and scalability.
• Write clean, maintainable, and production-ready code.
• Support continuous delivery and iterative product improvement.
• Participate in technical discussions and influence engineering direction.
• Apply modern software development practices and engineering standards.
• Explore opportunities to incorporate AI technologies into development workflows and products.

• Minimum of five years of professional software engineering experience.
• Strong backend development experience using Python or TypeScript.
• Experience building products within product-focused organisations.
• Ability to take ownership and drive projects independently.
• Comfort working within fast-paced and high-growth environments.
• Interest in AI technologies and AI-assisted development practices.
• Strong problem-solving and technical decision-making skills.
• Excellent collaboration and communication abilities.
• Ability to adapt quickly and learn new technologies.
• Based in London or willingness to work from a London office environment.

This Senior Backend Software Engineer opportunity presents a strong pathway for experienced backend professionals seeking high-impact product work in the UK technology sector. With competitive compensation, equity participation, visa sponsorship, and exposure to a rapidly scaling startup environment, the role offers excellent potential for long-term career growth.