djr
Lead Software Engineer
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Lead Software Engineer (.NET / React / AWS)
£600–£650/day (Inside IR35)
Fully Remote
6 Month Contract
We're looking for a hands-on Lead Software Engineer to play a key role in designing and delivering a large-scale, cloud-native digital marketplace platform being built across multiple European markets.
This is more than a Lead Developer role.
We're looking for someone who can design scalable software, make architectural decisions and lead engineering delivery, whilst remaining heavily hands-on in production code.
You'll join a product-led engineering team building a greenfield platform using React, TypeScript, .NET/C#, GraphQL and AWS, where you'll be expected to influence technical direction across the entire platform.
What you'll be doing
- Leading the technical design and delivery of a large-scale greenfield platform
- Designing scalable, cloud-native solutions across frontend, backend and AWS infrastructure
- Building modern React and TypeScript applications using scalable frontend architecture
- Designing and developing.NET/C# APIs, microservices, REST and GraphQL services
- Making solution design decisions around application architecture, service boundaries, messaging and scalability
- Working across event-driven architectures and distributed systems
- Deploying and supporting applications within AWS using services such as ECS/Fargate, Lambda, CloudFront, S3 and related cloud-native services
- Building and maintaining Infrastructure as Code using Terraform
- Leading technical discussions, mentoring engineers, reviewing code and driving engineering best practice
- Working closely with Product, Platform and Architecture teams to deliver software at enterprise scale
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What we're looking for
- Strong commercial experience building modern React and TypeScript applications
- Strong hands-on C#/.NET experience designing APIs and backend services
- Commercial GraphQL and REST API design experience
- Strong AWS architecture experience across cloud-native application delivery
- Commercial Terraform / Infrastructure as Code experience
- Experience designing scalable microservice and event-driven architectures
- Experience with micro-frontends, Module Federation or comparable frontend architecture patterns
- Strong solution design skills, with the ability to explain architectural decisions and trade-offs
- Experience leading engineering teams while remaining hands-on in production code
- Experience designing and delivering greenfield or large-scale platform builds
- Comfortable operating across frontend, backend, cloud and deployment rather than specialising in a single area
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What will make you stand out
We're particularly interested in engineers who naturally think about:
- How to design scalable systems from first principles
- Architectural trade-offs and technology selection
- API strategy (REST vs GraphQL)
- Service boundaries and domain modelling
- Event-driven architecture and asynchronous messaging
- Cloud-native design patterns and operational scalability
- Leading engineers through technical challenges while continuing to contribute code
The environment
- Greenfield platform with no legacy constraints
- Product-led engineering teams with high ownership
- Enterprise-scale platform serving multiple European markets
- Modern engineering practices across React, .NET and AWS
- Opportunity to influence technical direction from the outset
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