Senior Software Engineer -£100K - ID47321

Ready for a role where complex engineering really matters?

Looking for the freedom to shape platforms, improve performance and influence technical standards?

Want to join a business where your work has a visible impact every single day?

Our client is looking for a Senior Software Engineer (Platform) to join a high-performing engineering team building and evolving a large-scale, real-time platform at the core of a fast-moving technical environment.

This is an excellent opportunity for a senior engineer who enjoys solving hard distributed systems challenges, shipping meaningful improvements, and helping raise the technical bar across a platform used for high-volume, high-accuracy decision-making. If you are excited by performance, resilience, clean architecture and technical ownership, this could be a brilliant next move.

Senior Software Engineer (Platform)

As a Senior Software Engineer, you will join a small, focused team with genuine influence over the platform's direction. This is a role for someone who thrives in environments where engineering quality matters and where there is space to architect, build, optimise and improve systems that need to perform under pressure.

Our client operates in a highly data-driven, real-time setting, with platform services that process large volumes of incoming data and transactions every second. Accuracy, low latency, stability and scalability are all critical, so this role would suit an engineer who enjoys working close to the heart of core systems.

You will help build new integrations, improve platform performance, strengthen reliability and contribute to the technical excellence of the wider engineering function. Alongside feature delivery, you will also play a key part in areas such as engineering standards, CI/CD, observability and platform security.

Why This Role is Great

This is more than a typical senior engineering role. It offers the chance to make a real mark on both the product and the platform behind it.

In this role, you will have the opportunity to:

• Design, build and improve mission-critical distributed systems
• Shape clean, scalable service boundaries and influence technical architecture
• Work on a high-throughput, low-latency platform where engineering decisions have immediate impact
• Help integrate new external systems and services into a sophisticated core platform
• Optimise reliability, performance and safety across key services
• Contribute to technical standards, coding practices, CI/CD, observability and security
• Support the wider use of platform and historical data across engineering and research-focused teams
• Collaborate closely with experienced engineers in a business that values strong technical thinking and pragmatic delivery

This is the kind of opportunity that will appeal to engineers who like variety, ownership and the chance to work on genuinely interesting backend and platform challenges.

About You

You may already be working as a Senior Software Engineer, Platform Engineer, Backend Engineer, Distributed Systems Engineer or Software Engineer (Golang/Go, Java, C#, Rust or C++), and you are likely to enjoy building reliable systems in demanding technical environments.

Our client is keen to meet people who can bring a strong foundation in software engineering, along with the curiosity and judgement to work across architecture, delivery and platform improvement.

Their wishlist includes experience such as:

• Building and maintaining high-availability, high-throughput distributed systems
• Working in environments where correctness, resilience and performance are essential
• Delivering production systems in at least one systems or backend language such as Go, C++, Rust, Java or C#
• Designing clean, maintainable and evolvable software architectures
• Working comfortably with cloud infrastructure, Linux environments and build/deployment pipelines
• Collaborating effectively with both technical and non-technical colleagues
• Contributing in smaller, agile or growth-stage teams where adaptability and ownership are valued

A degree in a quantitative or technical subject would be highly attractive, though our client is also interested in strong problem-solvers who have built their expertise through meaningful hands-on experience.

Experience with Go would be helpful, but it is not essential. If you have strong engineering fundamentals and have worked in comparable backend or systems languages, there will be support to learn and develop further.

What You’ll Get in Return

Alongside the chance to work on impactful, technically challenging systems, the successful Senior Software Engineer will benefit from a strong package that includes:

• Competitive bonus scheme
• 10% matched pension contribution
• Private healthcare insurance
• Long-term illness insurance
• Gym membership
• Hybrid working, with one regular office day in London and flexibility across the rest of the week
• A trusting working culture with flexibility around how you manage your time and goals

Working Environment

Our client offers a collaborative hybrid setup, combining in-person connection with flexibility. The team works together in their London office on Thursdays, with flexibility for the remainder of the week. Typical hours are Monday to Friday, 10am to 6pm, with a culture built on trust, autonomy and outcomes.

This is well suited to someone who wants the support of an experienced team while also having the freedom to take ownership and do their best work.

Why Apply?

If you are looking for a Senior Software Engineer job in London where you can influence platform engineering, work on scalable backend systems, and help shape technical excellence in a modern engineering team, this role stands out.

It offers the chance to join a business where your ideas will be heard, your technical judgement will be valued, and your work will directly contribute to the evolution of an important platform.

Diversity & Inclusion

Our agency and our client are committed to building inclusive teams that reflect a broad range of backgrounds, perspectives and experiences. We welcome applications from all suitably qualified candidates and encourage people to apply even if they do not meet every item on the wishlist. Transferable skills, potential and diverse ways of thinking are highly valued.

Apply Now

If you are a Senior Software Engineer with strong platform, backend or distributed systems experience and are ready for your next challenge, we would love to hear from you. Apply today to find out more about this opportunity.