{"id":4001496,"url":"https://alion.io/job/tp-icap-group-principal-software-engineer","title":"Principal Software Engineer","company":{"id":172489,"name":"TP ICAP Group","domain":"tpicap.com","url":"https://alion.io/company/tp-icap","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":83,"open_postings":12,"ghost_share":0,"stale_share":0.667,"repost_share":0,"time_to_fill_p50_days":49,"computed_at":"2026-11-10T06:52:35Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Belfast, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AG Grid","optional":false},{"name":"Apollo Client","optional":false},{"name":"C#","optional":false},{"name":"Grafana","optional":false},{"name":"GraphQL","optional":false},{"name":"MSW","optional":false},{"name":"OpenTelemetry","optional":false},{"name":"Playwright","optional":false},{"name":"pnpm","optional":false},{"name":"React.js","optional":false},{"name":"Redux","optional":false},{"name":"SLI/SLO/SLA","optional":false},{"name":"State Management","optional":false},{"name":"Turborepo","optional":false},{"name":"TypeScript","optional":false},{"name":"Vitest","optional":false},{"name":"WebSockets","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-11-09T00:00:00Z","employer_posted_date":"2026-11-09","last_verified_at":"2026-11-10T22:20:44Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Group Overview\nThe TP ICAP Group is a world leading provider of market infrastructure.\nOur 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.\nThrough our people and technology, we connect clients to superior liquidity and data solutions.\nThe 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.\nThe 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.\nRole Overview\nYou’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.\nYou’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.\nRole Responsibilities\nOwn the frontend architecture: define component boundaries, state management patterns, and data-flow contracts across a pnpm/Turborepo monorepo\nDrive technical strategy for the platform - evaluate new tools, plan migrations, and make build-vs-buy decisions with clear rationale\nSet and enforce engineering standards: testing strategy (Vitest, Playwright, MSW), code quality (Biome, Knip, dependency-cruiser), and observability (Grafana Faro, OpenTelemetry)\nDesign solutions for complex problems: real-time data rendering at scale, performant AG Grid configurations, efficient Redux-saga orchestration, and GraphQL subscription management\nLead technical delivery across multiple workstreams - unblock teams, resolve cross-cutting concerns, and ensure consistency across packages\nMentor and grow Senior Engineers through architecture reviews, pairing on hard problems, and creating space for others to make decisions\nCollaborate with Product, Architects, and backend teams (C#/.NET, GraphQL BFF) to shape roadmap priorities and negotiate technical trade-offs\nExperience / Competences\nEssential\nDeep React + TypeScript expertise - you’ve architected large-scale applications and made structural decisions you can defend\nStrong experience with Redux in complex, data-intensive UIs (sagas, selectors, normalised state, performance at scale)\nProven ability to design and maintain monorepo architecture: package boundaries, dependency management, build orchestration with Turborepo/pnpm\nProduction GraphQL experience (Apollo Client) - schema design collaboration, caching strategies, subscriptions, codegen workflows\nExperience defining and implementing testing strategies across unit, integration, and browser layers\nTrack record of improving developer experience: build performance, linting/formatting automation, CI pipeline optimisation\nYou’ve led technical migrations or platform upgrades without halting feature delivery\nExperience setting up or evolving frontend observability (RUM, tracing, error budgets)\nStrong communicator who can translate architectural decisions into clear rationale for engineers, product, and leadership\nDesired\nExperience with real-time data systems (WebSockets, streaming updates, high-frequency UI rendering)\nDeep AG Grid expertise - custom renderers, virtual scrolling, enterprise modules at scale\nExposure to financial/trading platforms or latency-sensitive environments\nExperience with Module Federation or micro-frontend architectures\nFamiliarity with feature flag systems (Unleash) and progressive rollout strategies\nBackend awareness (C#/.NET, GraphQL resolvers, relational databases) sufficient to\ncollaborate on API design\nRole Band & Level\nManager, 7\n#LI-Hybrid #LI-MID #NIJobs\nNot The Perfect Fit?\nConcerned that you may not meet the criteria precisely? At TP ICAP, we wholeheartedly believe in fostering inclusivity and cultivating a work environment where everyone can flourish, regardless of your personal or professional background. If you are enthusiastic about this role but find that your experience doesn't align perfectly with every aspect of the job description, we strongly encourage you to apply. You may be the ideal candidate for this position or another opportunity within our organisation. Our dedicated Talent Acquisition team is here to assist you in recognising how your unique skills and abilities can be a valuable contribution. Don't hesitate to take the leap and explore the possibilities. Your potential is what truly matters to us.\nCompany Statement\nWe know that the best innovation happens when diverse people with different perspectives and skills work together in an inclusive atmosphere. That's why we're building a culture where everyone plays a part in making people feel welcome, ready and willing to contribute. TP ICAP Accord - our Employee Network - is a central to this. As well as representing specific groups, TP ICAP Accord helps increase awareness, collaboration, shares best practice, and holds our firm to account for driving continuous cultural improvement.\nLocation\nUK - City Quays 3 - Belfast","description_format":"text","description_chars":5620,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Stock Exchanges & Market Infrastructure","Financial Data & Market Intelligence"],"lifecycle":[{"event":"open","at":"2026-11-10T03:45:31Z"}],"visa":[{"country":"GB","licensed_sponsor":true,"adverts_offering_sponsorship_24m":0,"sanctioned_now":false,"evidence":"Licensed UK visa sponsor (Senior or Specialist Worker, Skilled Worker)","filings_12m":null,"filings_prev_12m":null,"green_card_filings_12m":null,"median_offered_wage_usd":null,"route":"Global Business Mobility: Senior or Specialist Worker; Skilled Worker","cap_exempt":false,"checked_at":"2026-11-10T11:34:35+00:00","sources":["UK Home Office: register of licensed sponsors (workers)"],"filings_for_role_12m":0}],"liveness":{"score":63,"band":"ok","label":"Likely open","p_open":1,"p_active":0.632,"p_room":1,"age_days":1,"expected_fill_days":49,"reasons":["conf:3","stale_co","velocity","win:early"],"computed_at":"2026-11-10T06:52:35Z"},"pay":null,"html_url":"https://alion.io/job/tp-icap-group-principal-software-engineer","json_url":"https://alion.io/job/tp-icap-group-principal-software-engineer.json","meta":{"generated_at":"2026-11-10T23:57:51Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":502,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-11T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":172489},"rest":"https://alion.io/mcp/rest/get_company?id=172489"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ftp-icap-group-principal-software-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Ftp-icap-group-principal-software-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Ftp-icap-group-principal-software-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/tp-icap-group-principal-software-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ftp-icap-group-principal-software-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4001496}},{"tool":"search_jobs","arguments":{"company":"tpicap.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4001496},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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