Technical Lead

Atarus; Greater London; On-site; GBP 80,000 - 110,000; Full time

Job summary

A high-growth FinTech firm in the UK is searching for a Tech Lead to guide the development of their core platform. The ideal candidate will possess hands-on engineering experience while influencing architecture and mentoring the team. Responsibilities include designing and improving distributed systems, evaluating technical decisions, and fostering a collaborative environment. This company values continuous learning and offers a modern tech stack, empowering engineers to excel and innovate.

Qualifications

• Experience in designing and building large-scale distributed systems.
• Proficiency in both backend and frontend technologies.
• Ability to mentor and support engineers.

Responsibilities

• Design, build, and improve distributed systems.
• Take lifecycle ownership from concept to deployment.
• Contribute to architectural decisions and support team growth.

Skills

Hands-on engineering

Mentorship

Designing distributed systems

Evaluating technical decisions

Collaboration

Tools

Python

TypeScript

React

Jest

Cypress

pytest

React Testing Library

Job description

A high-growth FinTech is expanding its engineering leadership and is looking for a Tech Lead 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

As a technical leader within the team, you’ll be responsible for:

• 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