{"id":4144667,"url":"https://alion.io/job/theleap-senior-full-stack-tsnestai-engineer","title":"Senior Full-Stack (TS/Nest/AI) Engineer","company":{"id":4537303,"name":"TheLeap","domain":"theleap.careers","url":"https://alion.io/company/theleap-careers","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Manatal","truth_index":null},"role":"AI/ML","role_family":"AI/ML","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":[],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":6,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Amazon ECS","optional":false},{"name":"AWS","optional":false},{"name":"CI/CD","optional":false},{"name":"Claude Code","optional":false},{"name":"Cursor","optional":false},{"name":"LLM","optional":false},{"name":"Nest.JS","optional":false},{"name":"Next.js","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React.js","optional":false},{"name":"SQL","optional":false},{"name":"Structured Outputs","optional":false},{"name":"TypeScript","optional":false},{"name":"AWS Lambda","optional":true},{"name":"AWS Step Functions","optional":true},{"name":"JavaScript","optional":true},{"name":"Node JS","optional":true},{"name":"SOC 2","optional":true}],"status":"live","first_seen_at":"2026-11-12T06:36:55Z","employer_posted_date":"2026-11-12","last_verified_at":"2026-11-12T06:36:55Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Build AI-powered financial software with real ownership.\nWe're looking for a Senior Full-Stack Engineer to join a US-based fintech company building a live platform for escrow and trust accounting in real estate.\nThe product is already in production and handles financial transactions, accounting, documents, and client portals. The company is now bringing engineering in-house and is looking for its first dedicated engineer to take ownership of the technology and help shape the next stage of the product.\nThis is not a role where you'll own one small part of a large engineering organization. You'll have a direct impact on the architecture, product, and technical direction, working closely with the founder and having the freedom to make and defend your own technical decisions.\nThe role is backend-leaning full-stack, with a strong focus on TypeScript, AWS, financial logic, and production AI.\n\nWhat You'll Work On:\nTake ownership of a live production codebase and lead the transition from an external development agency to an in-house engineering setup.\nReview and strengthen the platform's accounting and ledger logic, with a strong focus on correctness, reconciliation, auditability, and reliability.\nBuild new product functionality from fast, AI-assisted prototypes created by the founder.\nDesign and ship production AI features that process incoming financial and real-estate documents and turn unstructured information into structured data.\nBuild safeguards around AI-generated data so that accuracy, traceability, and human approval are built into the workflow.\nHelp scale the platform as transaction volume is expected to grow significantly.\nOwn application deployments and production troubleshooting on AWS.\nProvide second- and third-tier technical support for critical technical issues.\nWork directly with the founder and operations team, bringing your own engineering judgment and challenging assumptions when needed.\nEstablish practical engineering and quality standards as the company builds its in-house technical foundation.\n\nWhat You Bring\nRequired:\n6+ years of professional software engineering experience, with strong backend expertise.\nStrong production experience with TypeScript and NestJS.\nExperience with Next.js or React.\nStrong PostgreSQL skills, including writing and reviewing SQL directly.\nHands-on experience with ledger or financial logic - for example double-entry accounting, reconciliation, balances, payment posting, payouts, billing, or similar transaction-heavy systems.\nExperience shipping LLM/AI functionality to production, particularly document extraction, structured outputs, or similar use cases.\nA practical understanding of how to make AI systems reliable, traceable, scalable, and cost-efficient.\nAn AI-native development workflow using tools such as Cursor, Claude Code, or similar.\nExperience with CI/CD and AWS, particularly ECS.\nProfessional experience in fintech, accounting, proptech, healthcare, insurance, or another regulated environment.\nAbility to work 9 AM-5 PM in your local time and maintain regular working-hour overlap with the US team.\nNice to Have:\nMongoDB\nBanking API integrations\nAWS Lambda and Step Functions\nExperience taking over and improving a codebase built by an external team\nExposure to SOC 2 or similar compliance frameworks\n\nWhy Join?\nAI at the core: Build production AI features for a live financial platform rather than experimenting with AI as a side project.\nHigh ownership: You will be the main engineer responsible for architecture, development, and deployments.\nDirect impact: Work closely with the founder and have a direct influence on technical decisions.\nInteresting technical challenges: Make AI reliable enough for accounting and help scale a live product as transaction volume grows significantly.\nPredictable schedule: Normal 9-to-5 local working hours, with only rare emergency availability outside those hours.\nGrowth opportunity: Join as the first in-house engineer while the company is preparing for significant product and business expansion.\nIf this sounds like a strong match for your experience, I'd be happy to tell you more about the opportunity and discuss the next steps. Feel free to apply!","description_format":"text","description_chars":4199,"description_truncated":false,"requirements":{"experience_years_min":6,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence"],"lifecycle":[{"event":"open","at":"2026-11-12T06:36:55Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":30,"reasons":["conf:1","win:early"],"computed_at":"2026-11-12T08:10:07Z"},"pay":null,"html_url":"https://alion.io/job/theleap-senior-full-stack-tsnestai-engineer","json_url":"https://alion.io/job/theleap-senior-full-stack-tsnestai-engineer.json","meta":{"generated_at":"2026-11-12T08:10:07Z","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":16367,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-13T00:00:00Z"}},"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":4537303},"rest":"https://alion.io/mcp/rest/get_company?id=4537303"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ftheleap-senior-full-stack-tsnestai-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%2Ftheleap-senior-full-stack-tsnestai-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%2Ftheleap-senior-full-stack-tsnestai-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/theleap-senior-full-stack-tsnestai-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ftheleap-senior-full-stack-tsnestai-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4144667}},{"tool":"search_jobs","arguments":{"company":"theleap.careers","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4144667},"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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