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Onyx Capital Group logo
Onyx Capital Group

Number 1 Liquidity Provider in Oil Derivatives

Senior Rust Software Engineer

Backend EngineerSoftware EngineerFull TimeRemoteSeniorTeam 51-200Since 2016H1B No SponsorCompany SiteLinkedIn

Location

Sri Lanka

Posted

135 days ago

Salary

0

Seniority

Senior

Job Description

Senior Rust Software Engineer

Onyx Capital Group

• Take full ownership of complex systems end-to-end — from architecture and design through delivery and into production • Work alongside our global engineering organisation • Power live trading infrastructure used by some of the world’s most demanding market participants

Job Requirements

  • 5–10+ years in a software engineering role; track record of delivering production-quality features independently
  • Deep Rust expertise — ownership, lifetimes, trait objects, unsafe code, async runtimes, and macro authorship; comfortable working at the boundary of safe and systems-level Rust in production
  • Demonstrated experience building low-latency, high-throughput systems in Rust — including performance profiling, benchmarking, and architectural ownership of critical-path services
  • Strong systems programming fundamentals — memory layout, concurrency primitives, and lock-free data structures applied in real-world, performance-critical environments
  • Test-Driven Development discipline: unit, integration, and E2E tests written as a standard part of the development loop, not an afterthought
  • Automation mindset — demonstrated experience identifying and eliminating manual processes through tooling, scripts, and pipelines
  • REST API experience — designing, building, and consuming APIs with a clear understanding of authentication, versioning, and error handling
  • Source control and CI/CD: GitHub, Azure DevOps, or GitLab; branching strategies, PR workflows, and pipeline contribution
  • Experience working in cloud-hosted environments — Azure preferred
  • Strong sense of personal ownership — takes a feature from ticket to production without hand-holding, and treats issues in systems they’ve built as their own to resolve
  • Comfortable engaging directly with remote end users and business stakeholders to understand requirements, debug issues, and communicate progress clearly — without needing a middleman
  • Highly self-motivated with a bias for action — raises problems early, proposes solutions, and follows through to completion
  • Strong written and spoken English — clear and confident in both written and verbal communication across synchronous and asynchronous settings
  • Experience working with globally distributed teams is strongly welcomed; comfortable collaborating with colleagues in different time zones and cultures
  • Nice to Have**
  • FFI experience — calling into C/C++ libraries from Rust or exposing Rust APIs to other languages
  • Experience with async Rust runtimes (Tokio / async-std) and designing concurrent, fault-tolerant service architectures
  • Experience with agile delivery practices (sprint planning, retrospectives, stand-ups
  • Prior experience in financial services or fintech, or a genuine interest in financial technology and capital markets — not required, but candidates who are curious about the domain tend to thrive here
  • Familiarity with message-based architectures (Kafka, NATS, etc.), gRPC / protobuf, or low-level networking (TCP/UDP, DPDK)
  • Experience mentoring engineers, leading technical design reviews, or establishing Rust best practices and toolchain standards within a team

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