Senior Software Engineer

* 2 days a week in Paddington WeWork (2 Eastbourne Terrace, London W2 6LG
) — Monday & Wednesday
* 3 days a week WFH (flexible Fridays to come in)
* Travel to client offices as required

Digital Speed is a full-service product and engineering agency delivering strategy, design, and development for global clients. Our expertise spans Brand, Discovery, UX/UI, and Full-Stack Engineering, alongside product strategy and marketing. We partner with organisations in finance, automotive, sport, and technology to ship dependable, high-quality outcomes  are driven by 4 key values:
* Open – We arrive with options, welcome feedback, and find the best way forward together.
* Thriving – New challenges energise us; we learn and improve as a team.
* Experts – Specialists who care about their craft and deliver results with structure.
* Caring – We take our clients’ goals as seriously as our own and build trusted relationships.
** Characteristics
* *** Requirements
* ** 5+ years building production software (libraries, services, or dev-tools a plus).
* Proficiency in Java & Type Script. Skills in C#/.NET, Python & Go are a bonus.
* Solid grasp of modern API and integration patterns.
* Comfortable with CI/CD (Git Hub Actions and/or Jenkins), git, and code review.
* Experience publishing artifacts and managing repos (Maven, NuGet, PyPI, Nexus/Artifactory).
* Working knowledge of semantic versioning, release notes, and changelog hygiene.
* Basic security hygiene: artifact signing, checksums, SBOM mindset.
* Right to work in the UK; fluent in written and spoken English.
** Desirable Extras
*** Go (concurrency patterns), idiomatic Type Script design.
* Docs-as-code, ADRs, conformance/contract testing, mock servers.
* Exposure to OAuth/OIDC, mTLS, and PKI basics.
* Cloud & infra awareness (AWS/Azure/GCP, containers, runners).
* Prior agency/consulting experience and/or regulated industries.

You’ll join as a full-stack engineer in London, that leans more in to back-end. Working closely with agency leadership and client architecture teams. You’ll shape high-quality engineering practices: building reusable components, ensuring strong pipelines, and delivering production-ready software that can be confidently handed over. This is a role for someone who enjoys breadth and ownership: context-switching across languages, improving pipelines, and collaborating across teams.
** Responsibilities
* ** Core Engineering:
Design and build robust, reusable services and libraries across multiple languages (Java, .NET, Python, Type Script, Go).
* Architecture & Review:
Analyse requirements, propose technical approaches, and lead peer reviews to maintain high standards.
* CI/CD & Quality Gates:
Implement and refine pipelines with linting, tests/coverage, artifact signing, and versioning discipline.
* Release Management:
Ensure clean, traceable, and secure releases across environments, with strong changelog hygiene.
* Integration:
Build services that are observable, resilient, and easy to consume across teams and systems.
* Collaboration & Handover:
Work with client Architecture/Platform teams; produce documentation, run-books, and recorded walkthroughs.
* Continuous Improvement:
Optimise build times, automate repeatable tasks, and keep outputs deterministic and reproducible.
* Simplify:
Turn messy requirements into clear, repeatable systems.
* High-performance:
Care about reliability, observability, and regression safety.
* Collaborative:
Give/receive reviews; document decisions; unblock others.
* First-principles:
Handle ambiguity and make trade-offs explicit.
* Ownership:
Proactive, organised, and comfortable leading end-to-end.
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