Principal Software Engineer

You’ll be the technical leader for a real-time trading platform used daily by brokers across Rates & FX desks. The frontend is a large-scale React/TypeScript monorepo - dense data grids, real-time pricing via WebSocket and GraphQL subscriptions, and complex multi-panel layouts. You’ll set the technical direction and make sure the architecture scales as the product grows.

You’ll own the frontend architecture end-to-end: defining patterns, driving quality standards, removing technical debt, and enabling your team to ship confidently. You balance long-term technical vision with pragmatic delivery under real market conditions.

Role Responsibilities

• Own the frontend architecture: define component boundaries, state management patterns, and data-flow contracts across a pnpm/Turborepo monorepo
• Drive technical strategy for the platform - evaluate new tools, plan migrations, and make build-vs-buy decisions with clear rationale
• Set and enforce engineering standards: testing strategy (Vitest, Playwright, MSW), code quality (Biome, Knip, dependency-cruiser), and observability (Grafana Faro, OpenTelemetry)
• Design solutions for complex problems: real-time data rendering at scale, performant AG Grid configurations, efficient Redux-saga orchestration, and GraphQL subscription management
• Lead technical delivery across multiple workstreams - unblock teams, resolve cross-cutting concerns, and ensure consistency across packages
• Mentor and grow Senior Engineers through architecture reviews, pairing on hard problems, and creating space for others to make decisions
• Collaborate with Product, Architects, and backend teams (C#/.NET, GraphQL BFF) to shape roadmap priorities and negotiate technical trade-offs

• Deep React + TypeScript expertise - you’ve architected large-scale applications and made structural decisions you can defend
• Strong experience with Redux in complex, data-intensive UIs (sagas, selectors, normalised state, performance at scale)
• Proven ability to design and maintain monorepo architecture: package boundaries, dependency management, build orchestration with Turborepo/pnpm
• Production GraphQL experience (Apollo Client) - schema design collaboration, caching strategies, subscriptions, codegen workflows
• Experience defining and implementing testing strategies across unit, integration, and browser layers
• Track record of improving developer experience: build performance, linting/formatting automation, CI pipeline optimisation
• You’ve led technical migrations or platform upgrades without halting feature delivery
• Experience setting up or evolving frontend observability (RUM, tracing, error budgets)
• Strong communicator who can translate architectural decisions into clear rationale for engineers, product, and leadership

Desired

• Experience with real-time data systems (WebSockets, streaming updates, high-frequency UI rendering)
• Deep AG Grid expertise - custom renderers, virtual scrolling, enterprise modules at scale
• Exposure to financial/trading platforms or latency-sensitive environments
• Experience with Module Federation or micro-frontend architectures
• Familiarity with feature flag systems (Unleash) and progressive rollout strategies
• Backend awareness (C#/.NET, GraphQL resolvers, relational databases) sufficient to
• collaborate on API design

The TP ICAP Group is a world leading provider of market infrastructure.

Our purpose is to provide clients with access to global financial and commodities markets, improving price discovery, liquidity, and distribution of data, through responsible and innovative solutions.

Through our people and technology, we connect clients to superior liquidity and data solutions.

The Group is home to a stable of premium brands. Collectively, TP ICAP is the largest interdealer broker in the world by revenue, the number one Energy & Commodities broker in the world, the world’s leading provider of OTC data, and an award winning all-to-all trading platform.

The Group operates from more than 60 offices in 27 countries. We are 5,300 people strong. We work as one to achieve our vision of being the world’s most trusted, innovative, liquidity and data solutions specialist.