Senior Software Engineer: Distributed Systems & Real-Time

LineTen; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Job summary

LineTen is building a data-driven last-mile network and is seeking a Senior Software Engineer to craft robust backend services and frontend integrations. You will operate in a low-ceremony, high-trust environment, owning critical components and driving long-term software quality.

You will work on distributed systems with a focus on correctness, maintainability, and scalability, using AI-assisted tools responsibly while prioritizing sound design, testing, and thoughtful reviews.

Qualifications

• Proficiency in C# / .NET 8+ with async programming and MediatR/CQRS patterns.
• Strong understanding of distributed systems, event-driven architectures, idempotency, and race conditions.
• Experience with Redis caching and Azure Blob Storage for data management.
• API design focus: RESTful contracts, versioning, webhooks, long-running operations.

Responsibilities

• Develop robust backend services and distributed components.
• Ensure correctness, maintainability, and architectural clarity across systems.
• Collaborate on frontend integrations using SPA frameworks and real-time communication.

Skills

C# / .NET 8+

Distributed systems

Redis caching

Azure Blob Storage

API design

Real-time frontend integration

TypeScript

Job description

LineTen is building a data-driven last-mile network and is seeking a Senior Software Engineer to craft robust backend services and frontend integrations. You will operate in a low-ceremony, high-trust environment, owning critical components and driving long-term software quality.

You will work on distributed systems with a focus on correctness, maintainability, and scalability, using AI-assisted tools responsibly while prioritizing sound design, testing, and thoughtful reviews.