Senior Backend Software Engineer - Rust

Job Title: Senior Backend Software Engineer - Rust

Location: Toronto, ON (Hybrid 2 days)

Contract

ABOUT THE ROLE

• We're looking for a Senior Software Engineer to join a highly technical, cross-functional squad

building a high-throughput data platform for a global financial intelligence client.

• You'll work primarily on the backend, contributing to a Rust-based microservices architecture that handles millions of entities and audit events at scale.
• The platform is largely in place, your job is to execute with confidence, ship quality code, and collaborate closely with architects to evolve it further.
• This is approximately 95% backend application work, with a small React frontend footprint for
• the right candidate.
• The ideal candidate is in London and can work hybrid, however we are open to remote roles

throughout Europe for this.

THE STACK

o Rust (primary language — strong proficiency required)

o Event-driven microservices with Kafka / Confluent

o PostgreSQL for transactional data; transactional outbox pattern

o AWS (EC2, ECS, Lambda, etc.) and Kubernetes

o Infrastructure as Code on existing AWS patterns

o React (single-page app — bonus, not required)

o GenAI tooling, specifically Claude, for developer productivity

WHAT YOU'LL DO

o Design, build, and maintain scalable backend services and APIs in Rust

o Own and execute large portions of defined workstreams end-to-end. You will need to work with ambiguity and help clear it up to complete the work.

o Work alongside a senior architect — bring sound technical input to design discussions

o Build on top of existing AWS infrastructure patterns using IaC

o Collaborate across a squad of ~14: engineers, QA, product, UX, and DevOps

o Ensure code quality, performance, and observability across all deliverables

o Contribute to code reviews and informally mentor less experienced engineers

o Proactively surface blockers and technical risks before they become problems

WHAT WE'RE LOOKING FOR

o 3–7 years of experience delivering production software application Solid, demonstrable Rust skills — this is non-negotiable for the role

o Hands-on experience with event-driven or microservices architectures

o Strong understanding of relational database design and queries (PostgreSQL is a plus)

o Familiarity with AWS services and cloud-native infrastructure

o Comfortable with Kubernetes and containerised deployments

o Independently productive — you know when to ask for help and when to get on with it

o Strong communicator who can engage effectively in a distributed, international team

o Familiarity with GenAI coding tools (e.g. Claude) as part of your daily workflow

o Experience with observability practices (distributed tracing, OpenTelemetry, etc.) a plus

o React experience is a bonus but not expected