Principal Software Engineer

engine room: pre-trade risk checks, margin logic, position lifecycle, liquidation paths, and guardrails/kill-switch controls.Partner across teams to define clean boundaries, failure modes, and rollout strategy as the platform evolves.Build foundations properly: HA, horizontal scaling, zero-downtime upgrades, safe rollouts, incident playbooks and post-mortems that lead to measurable improvements.Put observability everywhere: tracing/metrics/logging, SLOs, alerting, capacity signals and performance regression detection.Create simulation and replay harnesses to validate changes before production (load, failover, extreme market conditions).Be the Rust thought leader internally: set standards, coach engineers, and raise the quality bar across the platform.What we're looking for3+ years minimum Rust in production, building performance-critical systems.7+ years backend engineering experience overall.Ultra-low latency mindset: hot-path profiling, lock-free/low-lock concurrency, cache/memory layout, backpressure, and reducing jitter.Exchange experience across 70%+ of the core components, for example: matching/order book, execution/order routing, risk, margin, positions, market data/streaming, internal APIs and monitoring.Comfort owning the full loop: requirements * architecture * implementation * measurement * rollout * on-call/incident response.Able to explain what you changed, how you measured it, and the impact (latency, throughput, stability, trading outcomes).Nice to haveDerivatives experience (traditional or crypto), and familiarity with funding, liquidation flows, and margining models.Event-driven architectures (Kafka-style), Redis, distributed systems patterns, high-throughput data pipelines.Protocols/feeds: FIX, binary feeds, ITCH/OUCH, SBE/Aeron-style IPC, shared memory patterns.Systems optimisation: CPU pinning/affinity, NUMA, cache locality, IRQ/interrupt tuning, NIC tuning, kernel bypass/DPDK.Open-source contributions in Rust or trading infrastructure.Why this roleTrue exchange rebuild with a 2+ year runway and strong backingTop-of-market comp with real ownership via equityHigh-trust environment reporting into the CTO + CRO, with scope to set backend direction and build a teamIdeal for HFT engineers who want to keep the performance edge without trading seat restrictionsIf you're a senior Rust engineer/architect who's built most of an exchange (order book to risk) and you want to lead a serious rebuild, apply here or message me and I'll share details. Similar jobs, Principal Backend Engineer London (Occasional travel) Salary: £95,000 - £120,000 + RSU's + Benefits An established, global technology business within the hospitality-tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of..., A growing startup in digital advertising is seeking a Principal Engineer to oversee system design and platform evolution. This role emphasizes building reliable, scalable infrastructure while working closely with the leadership team to translate product strategy into robust..., Role: Lead Backend Software EngineerLocation: London/Newcastle - Hybrid Office & HomeWho Are We?mkodo builds world class apps, middleware and digital products in the global lottery, betting, and gaming space.We have an open, supportive, dynamic culture where talented people..., Software Engineer - Backend London (Occasional travel) Salary: Up to £85k + Benefits An established, global technology business within the hospitality-tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of next-generation..., Overview Reporting to the Director of Architecture within the Risk Intelligence team. Risk Intelligence is responsible for developing critical services that support anti-money laundering efforts in the financial markets. We're looking for an ambitious Principal Web...

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TechShack are working with a leading, profitable exchange backed by some of the most well-known players in the market. They're rebuilding core infrastructure to support the next phase of scale: re-architecting core components for performance, reliability, and scale as they expand product coverage. The team is globally distributed and the role is fully remote.This is a leadership seat for a Rust first architect who's seen most of an exchange end-to-end and wants to own a true 2+ year rebuild programme. Expectation is you'll set the bar for Rust across the org and help grow the team (1 to 4 hires over time).Compensation: up to $350,000 base + bonus + equityWhat you'll work onOwn the next-generation backend rebuild across the core trading stack: real-time trade flows, execution pipeline, risk/margin, positions, market data and streaming APIs.Architect high-throughput, latency-critical Rust services that stay stable under peak load with tight p99/p999 behaviour and low jitter.Design the, TechShack are working with a leading, profitable exchange backed by some of the most well-known players in the market. They're rebuilding core infrastructure to support the next phase of scale: re-architecting core components for performance, reliability, and scale as they..., LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive..., ABOUT US LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive..., About Trinity Outsourcing SolutionsTrinity Outsourcing Solutions is dedicated to connecting talented professionals with dynamic career opportunities across the world. As a trusted HR partner, Trinity offers a pathway for skilled individuals to work in roles that align with..., TechShack are working with a leading, profitableexchange backed by some of the most well-known players in the market. They're rebuilding core infrastructure to support the next phase of scale: re-architecting core components for performance, reliability, and scale as they...