Lead Software Engineer

Atarus; England; On-site; GBP 60,000 - 80,000; Full time

Job summary

A high-growth FinTech company in the UK is seeking a Lead Software Engineer to guide the development of its core platform capabilities. In this role, you will be responsible for designing, building, and improving cloud-native distributed systems, as well as mentoring other engineers. Candidates must be proficient in both backend development with Python and frontend development using TypeScript/React. The company values hands-on engineering and strong testing culture, creating an inclusive and supportive environment.

Qualifications

• Strong experience in designing and building large-scale distributed systems.
• Familiarity with both backend and frontend components is crucial.
• Ability to mentor and uplift fellow engineers.

Responsibilities

• Design, build and improve cloud-native distributed systems.
• Take full lifecycle ownership of software from concept to deployment.
• Contribute to architectural direction and support team priorities.

Skills

Hands-on engineering

Mentorship

Backend development (Python)

Frontend development (TypeScript/React)

Architecture decision making

Continuous deployment

Testing culture

Tools

Jest

Cypress

pytest

React Testing Library

Job description

A high-growth FinTech is expanding its engineering leadership and is looking for a Lead Software Engineer to guide the development of core platform capabilities. Their products enable businesses across the UK, and the organisation is scaling quickly as demand increases.

This position is ideal for someone who enjoys hands‑on engineering while also influencing architecture, mentoring others, and shaping how modern software is built and delivered.

What You’ll Take Ownership Of

• Designing, building, and improving large-scale distributed systems
• Working across both backend (Python) and frontend (TypeScript/React) components
• Taking full lifecycle ownership of your work — from concept to deployment and ongoing operation
• Contributing to architectural direction and evaluating technical decisions
• Supporting and uplifting engineers through mentorship and pairing
• Helping the team prioritise simplicity, performance, and long-term maintainability
• Making engineering decisions with product, users, and business impact in mind
• Leveraging modern tooling and AI-assisted development to optimise delivery

How the Engineering Teams Operate

• Squads are cross‑functional with engineers, product, and design working closely together
• Work is guided by clear outcomes and real user needs
• Continuous deployment is the default, supported by fully automated pipelines
• Strong emphasis on testing, reliability, and observability
• Engineers hold end‑to‑end responsibility for the systems they create
• The platform is cloud‑native and designed for scale, resilience, and rapid iteration
• A collaborative environment where ideas are shared openly and respectfully
• Diverse teams where inclusion is part of the everyday culture
• Engineers have freedom to experiment and propose new approaches
• Low‑ego, supportive leadership focused on enabling people to do their best work
• A culture of continuous learning and improvement, backed by data and real‑world feedback

Tech Environment

You’ll work with a modern and thoughtful stack, which includes:

Plus a strong testing culture powered by: Jest • Cypress • pytest • React Testing Library

Seniority level

• Mid‑Senior level

Employment type

• Full‑time

Job function

• Information Technology