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Job Post Details

Senior Software Engineer (C# / .Net)
LineTen
·
2.6
London W12
•
Remote
Permanent
Apply on company site

Job details

Pay information not provided
Permanent
Remote in London W12

Full job description

What we do

LineTen is on a mission to crack the code on urban delivery. By leading with our values and putting carrier partners first, we are paving the way for better delivery experiences. LineTen is a new approach to delivery with a free carrier API and an operations management platform for shippers. We're building the first global data-driven last-mile network that has the potential to solve industry-wide problems.

We’re hiring a Senior Software Engineer who treats software as a craft, not a checklist. You’ll join a small, high-trust team where ownership is expected, curiosity is encouraged, and outcomes matter more than activity. This is not a ticket-factory role: you’ll be expected to think critically, challenge assumptions, design robust solutions, and take responsibility for their long-term success.

You’ll work across backend services, distributed systems and frontend integrations, with a strong focus on correctness, maintainability and architectural clarity. You’ll also use AI-assisted development tools responsibly, understanding that speed only matters when paired with strong design, testing and review discipline.

How you’ll work

  • Operate with high ownership in a low-process environment

  • Proactively look for what can be improved rather than waiting for direction

  • Value correctness, clarity and maintainability over “it just works”

  • Work outside strict role boundaries when needed, without feeding burnout culture

  • Communicate technical decisions clearly and push back constructively when required

Core technical skills

  • C# / .NET 8+, Entity Framework Core, async/await, MediatR / CQRS

  • Strong understanding of distributed systems: consistency models, event-driven patterns, idempotency, race conditions

  • Experience with Redis caching, Azure Blob Storage, and data-modelling trade-offs

  • API design: RESTful contracts, versioning, webhooks, long-running operations (202 Accepted patterns)

  • Real-time & frontend integration: SignalR / WebSockets, SPA frameworks (Vue / Nuxt or similar), TypeScript

What good looks like

  • You leave systems clearer, more correct, and easier to evolve

  • Problems are solved at the right level, not patched over

  • Trade-offs are explicit and understood

  • Other engineers trust your judgement and the quality of your code

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