Senior Software Engineer – Platform

Longshot Systems

full-time

Posted on: 12/23/2025

Location Type: Hybrid

Location: London • 🇬🇧 United Kingdom

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Senior

AWSCloudDistributed SystemsGoJavaLinuxRust

About the role

Join the team that owns and develops our trading platform
Architect and implement solutions to meet product, performance or stability goals
Own technical standards and coding guidelines, CI/CD, observability and security
Integrate trading venues and optimize key parts of the platform
Maintain a significant historical data repository
Support wider trading and research efforts around the company

Masters or PhD in a quantitative or technical subject (e.g. Maths, EE, Physics, Comp Sci) from a top university
Deep experience building mission critical distributed systems (finance, gaming, telco, ad-tech, etc.) where throughput, correctness and availability are a hard requirement.
Startup experience: Proven track record shipping products in small, fast moving teams.
Proven track record delivering and maintaining production systems in at least one systems language (Go, C++, Rust, Java, C#, etc.), with clear, idiomatic designs.
Architecture & design: Able to reason about trade offs and produce clean, evolvable service boundaries.
Cloud & DevOps: comfortable working in AWS, linux and wrangling build pipelines. We have dedicated DevOps people, but you do need to be competent in the core skills here.
Fluent written and spoken English. Communicating with the team is as important as the technical work. You need to be able to effectively collaborate on everything from low level details to long term strategic planning.
Nice to have
Trading, market making or exchange experience.

Benefits

Tip: use these terms in your resume and cover letter to boost ATS matches.

distributed systemssystems programmingGoC++RustJavaC#architecturedesignCI/CD

communicationcollaborationproblem-solvingteamworkstrategic planning

MastersPhD