Job Description

Node.JS Developer

Hybrid: 1-2 days in London/Reading

LXS are a global team, with talent ranging from business analysts to developers and architects, all experienced in the Altnet and Telecoms sectors.

What are we looking for?

Technical Requirements:

Deep, hands-on experience with Node.js, especially asynchronous programming, non-blocking I/O, and a modern Node.js framework (preferably Fastify (Typescript), but Express, Koa, or Hapi is fine)

Track record of designing and shipping microservices in production, ideally using GCP, but AWS/Azure also relevant.

Strong grasp of API standards (REST, GraphQL, OpenAPI, Swagger, YAML).

Proven competence with containerisation (Docker, Kubernetes) and cloud-native deployment.

Working familiarity with DevOps tooling - CI/CD (GitHub, GitLab), IaC (Terraform, Ansible), monitoring (Splunk, StackDriver, Datadog, Grafana).

Good security hygiene: implementing OAuth 2.0, OIDC, CORS, CSRF, etc.

Solid experience with both SQL and NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB, Redis).

Unit and functional testing using modern test frameworks (Cypress, Mocha, Jest, etc).

Behavioural/Soft Skills:

Able to mentor and support junior engineers with a pragmatic approach to knowledge sharing.

Communicates clearly with both technical and non-technical stakeholders; can explain architecture decisions.

Proactive in root cause analysis and systems troubleshooting.

Likely a senior or lead backend engineer (or mid-weight pushing for senior), with 5+ years of real-world Node.js and cloud microservices delivery, either in digital, telecom, SaaS, or high-transaction sectors.

"Cloud native" mindset - meaning is comfortable in containerised, automated environments and fast to pick up new DevOps tools.

Equally happy building new services or optimising/maintaining existing ones.

Combines both architecture/design and hands-on delivery, not "just a coder" or "just a theorist".

Thrives in complex environments - sees ambiguity and fast-paced change as a challenge, not a threat.

Anyone without hands-on Node.js experience in production, lacking exposure to cloud/container environments, or uncomfortable owning the delivery end-to-end will very likely struggle.

Job Types: Temporary, Fixed term contract
Contract length: 6 months

Pay: 400.00 per day

Work Location: Hybrid remote in London W1U 5QD