Senior API Technical Consultant (Graphql Specialist)

Staffworx Limited; Greater London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A leading technology consultancy in Greater London is seeking a Senior API Technical Consultant with deep expertise in GraphQL. You will design and build the next generation of high-scale SaaS platforms and play a key role in developing a robust TypeScript/Node.js backend. This is an exciting opportunity to influence the technical direction and drive API evolution within the organization.

Responsibilities

• Design and build next generation SaaS platforms.
• Develop the TypeScript/Node.js backend.

Job description

Senior API Technical Consultant (GraphQL Specialist)

Design and build next generation of high‑scale SaaS platforms. We're looking for a senior/lead engineering consultant with deep expertise in GraphQL to take a leading role in developing our robust TypeScript/Node.js Back End. You will be instrumental in shaping our technical direction, driving the evolution of our APIs, ensuring our services are resilient, scalable and secure within a cutting‑edge, cloud‑native environment (Helm, Kubernetes).

The Deliverables

• Design and build sophisticated, scalable GraphQL APIs and Back End services using TypeScript and Node.js.

• Lead the design and evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform.

• Champion best practice in code quality, automated testing (Vitest, Playwright) and observability to deliver resilient, maintainable, and production‑ready business logic.

• Drive DevOps excellence by collaborating on CI/CD pipelines (Jenkins, Concourse), containerisation (Docker) and Kubernetes deployments.

• Mentor and empower fellow engineers through thoughtful code reviews, technical guidance and fostering a culture of collaborative problem‑solving.

• Influence technical strategy by working within a cross‑functional Agile team to guide process improvements and make key architectural decisions.

Experience

• Extensive production experience architecting and delivering complex applications with TypeScript and Node.js

• Expert level GraphQL, including advanced API design, schema evolution, performance optimisation.

• Strong automated testing frameworks like Vitest and Playwright.

• Proficiency with modern DevOps tooling and cloud‑native architecture, including Docker, Helm, Kubernetes

• Proven ability to lead technical discussions, influence architectural decisions, drive improvements across a codebase.

• A passion for mentoring and coaching other developers to elevate the team's capabilities.

Beneficial: Large‑scale SaaS, streaming services, advanced Helm chart authoring.

Please send your CV, day rate and availability for consideration, alternatively should you know of a suitable other, please forward for review.