API Developer - Golang/Python

API Developer (Golang/Python) – Financial Services

* Inside IR35

* Sheffield (1–2 days/month onsite)

A leading financial services organisation is seeking an experienced API Developer to join their team on a contract basis. This is a great opportunity to work on modern, scalable systems within a highly regulated and fast-paced environment.

This role would suit a developer who enjoys working on backend systems but is comfortable contributing to full-stack solutions when needed. If you’re looking to make an impact within a major financial organisation, this could be a strong fit.

Role Overview

You’ll be responsible for designing, building, and integrating high-performance APIs, with a strong focus on Golang (preferred) or Python. You’ll also collaborate with front-end teams, contributing to web-facing components using technologies such as React or Node.js.

Key Responsibilities

* Design, develop, and maintain robust APIs

* Ensure seamless integration across internal and external systems

* Collaborate with cross-functional teams including front-end developers

* Contribute to architecture decisions and best practices

* Support performance optimisation and scalability initiatives

Required Skills & Experience

* Strong experience with Golang (preferred) or Python

* Proven track record in API development (design, build, integration)

* Understanding of modern software engineering practices

Nice to Have

* Experience with React or Node.js

* Working knowledge of Python (if not primary language)

* Exposure to Rust

Highly Desirable

* Experience with Identity and Access Management (IAM)

* Familiarity with Google Cloud Platform (GCP)

More details available on successful application