Senior API Technical Consultant (GraphQL Specialist) in City of London

Overview

Design and build next generation of high-scale SaaS platforms. We are seeking a senior/lead engineering consultant with deep expertise in GraphQL to take a leading role in developing our TypeScript/Node.js backend. You will shape technical direction, drive API evolution, and ensure services are resilient, scalable, and secure within a cloud-native environment (Helm, Kubernetes).

Responsibilities

• Design and build sophisticated, scalable GraphQL APIs and backend services using TypeScript and Node.js.
• Lead the design and evolution of API schemas to meet the needs of a rapidly growing platform.
• Champion best practices in code quality, automated testing (Vitest, Playwright) and observability to deliver resilient, maintainable, production-ready 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 a culture of collaborative problem-solving.
• Influence technical strategy by working within a cross-functional Agile team to guide process improvements and key architectural decisions.

Qualifications

• Extensive production experience architecting and delivering complex applications with TypeScript and Node.js.
• Expert-level GraphQL, including advanced API design, schema evolution, and performance optimization.
• 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, and 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.

Application

Please send your CV, day rate and availability for consideration. If you know of a suitable alternative, please forward for review. Staffworx Limited are a UK-based recruitment consultancy supporting the global digital, E-commerce, software & business consulting sectors.

Seniority level

• Mid-Senior level

Employment type

• Contract

Job function

• Information Technology

Industries

• Operations Consulting