Senior Software Engineer

Vargo Group

📍 cardiff, Wales, United-Kingdom

Full-time IT & Technology Posted February 19, 2026

Job Description

Reporting to the Engineering Lead, you will drive the design of our core lending platform. We are looking for an engineer who understands modern, high-performance Python—not just scripting. You will architect event-driven systems, handle asynchronous workflows, and mentor the team on scalability best practices.

Core: Modern Python (3.10+), AsyncIO, REST APIs.

Core Responsibilities

Architecture & Scale: Design scalable, asynchronous backend systems. You will make high-level decisions on concurrency, latency, and caching.

Technical Leadership: Lead the team on performance tuning and reliability patterns (retries, idempotency).

Code Quality: Enforce a high standard of testing (Unit, Integration, Contract) and modern dependency management.

Mentorship: Mentor junior engineers through pairing and code reviews to drive technical growth within the team.

Requirements

Deep Python Expertise: You know the internals of the la...