Senior Developer
London | £70,000 – £90,000 + Benefits
Most developers focus on building the features, this role is for someone who thrives on owning what happens once its live.
We’re working with a well-established SaaS business whose platform is used by thousands of customers globally. Over the past few years, they’ve grown steadily, expanded their engineering function, and built a reputation for creating reliable products rather than chasing hype.
As their platform continues to scale, they’re looking for a Senior Developer who enjoys solving complex technical problems, improving systems, and building software that stands up in production.
The Good Bits:
A Typical Day in the Role:
The Kind of Person who’ll Enjoy this Role
You’ll have spent several years building and supporting production systems and understand that software engineering isn’t just about writing new code, you’ll value practical engineering, thoughtful decision-making and will be able to balance technical excellence with delivery.
You Will Have:
Other Skills Needed:
Solid backend engineering experience in C#, Java, or Go, with a strong grasp of API design and architecture.
Hands-on experience managing and debugging production systems across cloud and self-managed infrastructure.
Proven ability to navigate complex third-party integrations, including retry logic and reconciliation workflows.
Strong understanding of distributed system resilience – partial failures, retry strategies, and circuit breaker patterns.
Why People Join:
Engineers here are given autonomy in decision making and trusted to do so. You will have the opportunity to work on meaningful technical challenges, influence how systems evolve, and collaborate with experienced colleagues who care about building things properly.
The Hard Bits:
Careers move quickly. Make sure yours is moving in the right direction.
Apply now or get in touch for a confidential conversation.
We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.
By applying you are confirming you are happy to be added to the Addition Solutions mailing list regarding future suitable positions. You can opt out of this at any time simply by contacting one of our consultants.
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