Lead Software Engineer Python API - Fintech

Client Server Ltd.; Greater London; Hybrid; GBP 100,000 - 120,000; Full time

Job summary

Client Server Ltd. in London is seeking a Lead Software Engineer to head a backend-focused team building features and refactoring the core fintech platform, including banking integrations.

You will drive architecture and hands-on coding, mentor engineers, and shape best practices across the SDLC in a hybrid London role with some office presence.

Qualifications

• Experience as backend Python developer with full SDLC.
• Team leadership and mentoring experience (1-2-1s, performance reviews).
• Cloud services knowledge (GCP preferred; AWS/Azure acceptable).
• Experience building APIs, ideally FastAPI.
• Strong CS fundamentals: OOP, data structures, patterns, algorithms.

Responsibilities

• Lead a small tech team delivering features and refactoring of the fintech platform.
• 50/50 split between architecture/design and people management.
• Mentor junior developers and conduct performance reviews.
• Improve CI/CD, testing and deployment processes.
• Collaborate with stakeholders and integrate with banking partners.

Skills

Python

API design

Team leadership

SDLC

CI/CD

GCP

AWS

Azure

FastAPI

OOP

Data structures

Design patterns

Communication

Education

STEM degree

Tools

Git

Docker

Kubernetes

Job description

Lead Software Engineer Python API - Fintech

London, Greater London | £100k - £120k per year

Lead Software Engineer / Developer London / WFH to £120k

Are you a skilled a backend focussed Python technologist with team leadership experience?

You could be progressing your career at a well-funded and profitable FinTech start-up.

As a Lead Software Engineer you'll head up a small, talented tech team to deliver new features and enhancements as well as some refactoring work, contributing to the core banking platform which integrates with major players such as HSBC. There's a relatively young codebase and lots of new projects to get stuck into.

You'll be collaboratively problem solving in a hands-on role with approximately 50/50 split between architecture / design and people management. You'll set the standards and mentor more junior developers, fostering a culture of continuous improvement and self development.

Location / WFH:

You'll join colleagues in the Central London office with flexibility to work from home twice a week in a hybrid model.

About you:

• You're an experienced Software Engineer with Python expertise and a strong knowledge of software engineering best practices and full SDLC experience
• You have team leadership experience, happy to mentor and develop others as well as provide 1-2-1s and performance reviews
• You have a good knowledge of cloud based services (they use GCP but AWS or Azure experience is fine)
• You have experience of building APIs, ideally FastAPI experience
• You have a good knowledge of CI/CD, testing and deployment
• You have a thorough understanding of Computer Science fundamentals such as OOP, Data Structures, Design Patterns, Algorithms
• You're collaborative and pragmatic with great communication skills
• You're degree educated in a STEM discipline, having achieved a 2.1 or above

What's in it for you:

As a Lead Software Engineer you will earn a competitive salary (to £120k) plus pension and other benefits.