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Lead Developer

Experis • TRAFFIC • London, Not Specified, United Kingdom • £600 - £750 / * • 8h ago

Lead Developer

6 Months

Hybrid -1/3 days a month in office, either London or Bristol

750

Overview:

Working within an agile digital delivery team developing and supporting a mission critical application for the UK client , with instances hosted on both a secure cloud platform (AWS) and on VMs hosted a managed on-prem hosting environment. The application is extant and Live. You are to be the senior developer leading the ongoing development and support of the application, including designing, developing, integrating and unit testing new features in response to Product Owner / Client priorities and fixing bugs/issues raised on the Live application. You will have experience working with/developing microservices, containerised applications, TypeScript, React(TypeScript), GraphQL / Hasura, API development and integration, PostgreSQL, JavaScript, GoLang, and Python. You will be comfortable using the supporting tools for Agile product delivery such as JIRA (User Story / Defect / Task Management), Confluence (Documentation / Comms), and Slack (collaboration / comms).

Key Responsibilities

Lead development of microservices and front-end components using Node.js (TypeScript) and React (TypeScript).
Configure and extend Hasura GraphQL Engine, including permissions, computed fields, and API integrations.
Design and implement PostgreSQL schemas, migrations, and triggers; ensure data integrity and performance.
Integrate with Identity and Access Management (IdAM) systems.
Ensure secure coding practices and compliance with platform security posture.
Collaborate with UX, QA, and DevSecOps teams to deliver accessible, performant, and maintainable features.
Monitor and troubleshoot applications
Contribute to design discussions, code reviews, and maintain documentation in Confluence.

Essential Technical Skills

Languages & Frameworks

TypeScript (Proficient) - primary language for backend and frontend.
React (Proficient) - SPA development, state management, performance optimization.
js (Proficient) - microservices architecture.
GraphQL (Working) - queries, mutations, schema awareness.
SQL (PostgreSQL) (Working) - schema design, queries, migrations.
JavaScript (Working) - legacy code and Jest tests.
Go (Awareness) - infrastructure tooling and services.
Python (Awareness) - Airflow DAGs and automation scripts.

Infrastructure & Cloud

AWS (EKS, S3, IAM)
Kubernetes fundamentals (pods, services, ingress, Istio, Traefik).
Containerization with Docker/containerd.Observability

Collaboration Tools

Jira, Confluence, Slack, Figma.

Clearance:

SC CLEARED

Travel:

Hybrid role, predominantly remote, but some travel to Client site will be required (estimate 1-2 times per month to London and/or the South / South-East).

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