Senior Software Engineer (C# / .Net) at LineTen

London, England, United Kingdom -

Full Time

Start Date

Immediate

Expiry Date

13 Apr, 26

Salary

0.0

Posted On

13 Jan, 26

Experience

5 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

C#, .NET, Entity Framework Core, Async/Await, MediatR, CQRS, Distributed Systems, Redis Caching, Azure Blob Storage, API Design, RESTful Contracts, SignalR, WebSockets, SPA Frameworks, TypeScript

Industry

Software Development

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

Responsibilities

The Senior Software Engineer will work across backend services, distributed systems, and frontend integrations, focusing on correctness, maintainability, and architectural clarity. They are expected to think critically, challenge assumptions, and design robust solutions.