Lead Software Engineer

Lead Software Engineers | AI Consultancy | London

Location: London (Hybrid)Salary : Up to £150,000Python | Distributed Systems | API Architecture | Cloud | Microservices | Full Stack Engineering | AI/ MLI’m currently looking for: 2 x Lead Software Engineer (1 x Financial Services & 1 x BioTech)Our client builds high-scale, high-performance platforms used by millions of customers every day powering intelligent digital experiences, real-time services, and seamless integrations for some of the UK’s most recognisable brands.They’re a product-led engineering organisation with a deep focus on craft, simplicity, and technical excellence.

With massive data volumes, complex system interactions, and an engineering culture that ships fast, this is an environment built for people who love solving hard problems at scale.If you want to lead architecture, shape platform direction, and build world-class back-end systems that power mission-critical products, this is the one.ROLE: Lead Software Engineer (Software Engineering, Technical Leadership, Mentoring, Architecture Ownership)We’re seeking Lead Software Engineers who can drive backend strategy, guide technical decisions, and elevate engineering standards across key product areas.This is a senior engineering role - ideal for someone who wants ownership, architectural influence, and the chance to build systems that scale to millions of users.You’ll define technical vision, lead critical backend projects, and act as a trusted engineering voice in product and platform discussions - shaping everything from API design and system architecture to performance, resilience, and scalability.What You’ll BringExpert-level Python engineering skills - clean, scalable, production-grade code Strong experience building and designing APIs (REST, GraphQL, or gRPC)Hands-on architectural depth — microservices, distributed systems, event-driven patternsCloud expertise (AWS preferred) — Lambda, ECS, DynamoDB, SQS, SNS, API GatewayProven track record delivering high-scale backend systemsExperience leading engineers — mentoring, technical direction, code standardsExcellent communicator with the ability to influence product and technical strategyPassion for robust engineering — testing, observability, optimisation, performanceFull Stack Engineering - Javascript/ Typescript/ ReactApply now and take a lead role building the backend foundations of one of the UK’s most ambitious consumer platforms.