{"id":745427,"url":"https://alion.io/job/openfx-senior-full-stack-engineer-l3-trading","title":"Senior Full stack Engineer (L3) - Trading","company":{"id":6134,"name":"OpenFX","domain":"openfx.com","url":"https://alion.io/company/openfx","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"A","score":95,"open_postings":14,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":186,"computed_at":"2026-10-28T05:59:10Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Bengaluru, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":17500,"max_usd":41000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":168},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Next.js","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React.js","optional":false},{"name":"Redux","optional":false},{"name":"Rest API","optional":false},{"name":"State Management","optional":false},{"name":"TypeScript","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-08-06T08:29:09Z","employer_posted_date":"2026-08-11","last_verified_at":"2026-10-28T16:05:47Z","board_verified":true,"closed_at":null,"days_open":83,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":83},"description":"About Us\nOpenFX is on a mission to move money as freely as data, unrestricted by time zones, banking hours, or legacy systems. We are building the infrastructure that will power the next generation of cross-border payment systems for institutions. The team's execution has been exceptional, and we're scaling at a remarkable pace. Our stellar early team comes with experience in companies like J.P. Morgan, Goldman Sachs, FalconX, Paypal, Affirm, Polygon, Kraken, Nium & others. We're backed by Accel, Lightspeed, NfX and other top-tier investors.\nRole Overview\nWe're hiring a frontend-heavy Full Stack Engineer for our Trading team - the team that owns the client's entire trade experience.\nTrading owns quote generation, pricing strategy, the spread engine, and the trade lifecycle across GUI, API, and soon conversational AI. Our north star is Total Payment Volume, with Gross Revenue as the control metric.\nYou will own the client-facing surface of that experience. This is where an institutional client sees a live quote, understands the price and fees, commits to a trade, and tracks it through to settlement. You will own architecture for these flows - state management, data fetching, error handling, and performance - and be trusted with the correctness of what the client sees.\nYou will also work across the stack. You'll build and extend the APIs your surfaces depend on, model the data behind them, and ship the backend piece of a feature rather than waiting on someone else to unblock you. You don't need deep backend systems experience for this role, but you do need to be genuinely comfortable there.\nWe're specifically looking for someone with a trading background. Think a crypto exchange, brokerage, or trading platform (CoinDCX, Groww, CoinSwitch Kuber, or similar).\nKey Responsibilities\nOwn the architecture of critical client trade flows - quote and pricing surfaces, trade initiation, and status and settlement tracking - across GUI, API and conversational AI.\nDesign frontend state and data-fetching patterns, exception handling and retries.\nDrive frontend performance and reliability - rendering efficiency under frequent updates, load times, and stability on the flows that carry volume.\nBuild and extend the APIs and data models your surfaces depend on, and ship features end-to-end rather than stopping at the boundary.\nInstrument the client experience - Error rates, flow completion, and latency - problems are visible before clients report them.\nPartner closely with Design and Product to shape flows, and with backend engineers to shape API contracts.\nDrive work to closure with Product, Design and Operations. You are accountable for adoption, not just delivery.\nAct as a product engineer - scope a problem statement, understand its product impact, and take the hard prioritisation calls.\nRaise the bar through code review and design feedback, and mentor L1/L2 engineers on the team.\nBuild a healthy engineering-excellence and tech-debt backlog - surface the right items, work with the EM on a resolution plan, and drive them to closure.\nParticipate in on-call, respond to incidents with urgency, and turn post-mortems into durable fixes.\nWhat we are looking for\nMust-haves:\n5-7 years of experience building production web applications, with the majority of that depth on the frontend.\n A trading background - you've worked at a trading company, exchange, or brokerage and have built client-facing systems on a live trade or order path (e.g. CoinDCX, Groww, CoinSwitch Kuber, or similar).\nDeep expertise in TypeScript and React, and strong command of Redux or equivalent state management on non-trivial applications.\nHands-on experience with server-side rendering and code splitting, and a clear sense of when each is worth the cost.\nStrong grasp of frontend architecture - component design, data fetching, error handling, and data synchronisation between client and server.\nExperience building reliable UIs on top of asynchronous systems, where ordering isn't guaranteed, and failures are partial.\nExperience writing automated tests for Frontend and working with Frontend test frameworks.\nTrack record on frontend performance - you've diagnosed and fixed a slow production surface.\nWorking backend proficiency: building CRUD and REST APIs, designing schemas and queries on PostgreSQL, and comfort in a Next.js, Hono (or similar) server runtime. You should be able to own the backend of your own feature.\nSolid command of object-oriented programming principles and low-level design patterns.\nComfort with abstract, ambiguous problems - you can turn a vague mandate into scoped, sequenced deliverables without waiting for someone to specify it for you.\nHands-on and high agency. You find the important problem and go solve it rather than waiting to be assigned it.\nHeavy AI user. You use AI coding tools with real technique and get materially more done because of it.\nData-driven, and a clear written communicator - we are async-heavy and globally distributed.\nWhat helps you stand out:\nExperience building real-time financial surfaces - live pricing, order books, or streaming quote updates.\nExperience with complex financial dashboards, reconciliation views, or transaction history at scale.\nExperience with FX, multi-currency systems, or cross-border payments.\nExperience with frontend testing, observability and monitoring tooling.\nExperience building a design system or shared component library that other engineers actually used.\nWhat Success Looks Like\nThe client trade surfaces you own always reflect accurate pricing and trade state - including during retries, partial failures, and backend delays.\nCritical flows are fast and stable under peak usage, and frontend incidents are rare, easy to debug, and quickly resolved.\nYou ship complex features end-to-end from technical design to execution, delivery and adoption - including the backend they need.\nProduct and Design rely on your judgment for client-facing decisions on the trade path.\nL1/L2 engineers around you grow measurably faster.\nYou raise the bar for frontend engineering in the Trading team.\nWhat We Offer\nCompetitive salary and benefits package.\nEquity in a rapidly growing company.\nOpportunity to work in a fast-paced startup at the forefront of fintech innovation.\nOpportunity to make a significant impact on global financial infrastructure.\nCollaborative work culture with emphasis on personal and professional growth.\nWe are committed to building a diverse and inclusive workplace. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.","description_format":"text","description_chars":6686,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Payment Processing & Gateways","Currency Exchange & FX Payments"],"lifecycle":[{"event":"open","at":"2026-09-11T13:59:29Z"}],"visa":[],"liveness":{"score":61,"band":"ok","label":"Likely open","p_open":1,"p_active":0.85,"p_room":0.72,"age_days":82,"expected_fill_days":186,"reasons":["conf:3","win:mid","crowd:"],"computed_at":"2026-10-28T05:59:10Z"},"pay":null,"html_url":"https://alion.io/job/openfx-senior-full-stack-engineer-l3-trading","json_url":"https://alion.io/job/openfx-senior-full-stack-engineer-l3-trading.json","meta":{"generated_at":"2026-10-28T16:29:49Z","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":22395,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-29T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"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":6134},"rest":"https://alion.io/mcp/rest/get_company?id=6134"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fopenfx-senior-full-stack-engineer-l3-trading"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"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%2Fopenfx-senior-full-stack-engineer-l3-trading"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"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%2Fopenfx-senior-full-stack-engineer-l3-trading"},{"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/openfx-senior-full-stack-engineer-l3-trading\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fopenfx-senior-full-stack-engineer-l3-trading"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":745427}},{"tool":"search_jobs","arguments":{"company":"openfx.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":745427},"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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