{"id":730024,"url":"https://alion.io/job/lucio-senior-backend-engineer","title":"Senior Backend Engineer","company":{"id":3002,"name":"Lucio","domain":"lucioai.com","url":"https://alion.io/company/lucio","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"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":["Delhi, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":16500,"max_usd":39000,"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":"Celery","optional":false},{"name":"Flask","optional":false},{"name":"Gevent","optional":false},{"name":"Go","optional":false},{"name":"Machine Learning","optional":false},{"name":"OCR","optional":false},{"name":"Python","optional":false},{"name":"Cython","optional":true}],"status":"live","first_seen_at":"2026-09-11T09:32:41Z","employer_posted_date":null,"last_verified_at":"2026-09-11T09:32:41Z","board_verified":false,"closed_at":null,"days_open":48,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":48},"description":"We're hiring a Senior Backend Engineer to build and scale the core logic behind Lucio's AI-native legal platform. This role is focused on designing high-performance backend systems that power document intelligence, AI workflows, and complex legal use cases. You'll work closely with AI engineers and product teams to take models, prompts, and research outputs and turn them into reliable, production-ready backend services. The role is hands-on, ownership-driven, and directly impacts how legal professionals experience Lucio in day-to-day workflows.\nResponsibilities:\nDesign, build, and maintain scalable backend services using Python.\nDevelop asynchronous workflows and task pipelines for AI and document-heavy processing.\nIntegrate Generative AI and ML models into backend systems used in production.\nBuild and optimize document processing pipelines involving OCR, parsing, and large unstructured files.\nImplement APIs and services that support high-volume, low-latency use cases.\nWork closely with AI, frontend, QA, and product teams to deliver complete features.\nWrite clean, maintainable, and well-documented code.\nParticipate in code reviews and contribute to architectural discussions.\nDebug production issues and improve system robustness over time.\nRequirements:\n5+ years of experience building backend systems in production.\nStrong hands-on experience with Python and backend frameworks/tools (Flask, Celery, Gevent, etc. ).\nSolid understanding of Generative AI and Machine Learning fundamentals.\nExperience integrating LLMs or ML models into backend applications.\nExposure to OCR tools, document processing, and large unstructured data.\nStrong grasp of asynchronous processing and distributed backend systems.\nComfortable working in a fast-moving startup environment.\nHigh ownership, strong problem-solving skills, and attention to detail.","description_format":"text","description_chars":1851,"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":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Document AI","Legal AI"],"lifecycle":[{"event":"open","at":"2026-09-11T09:32:41Z"}],"visa":[],"liveness":{"score":11,"band":"cold","label":"Long shot","p_open":0.4,"p_active":0.589,"p_room":0.45,"age_days":47,"expected_fill_days":28,"reasons":["seen:47","win:tail"],"computed_at":"2026-10-29T05:49:05Z"},"pay":null,"html_url":"https://alion.io/job/lucio-senior-backend-engineer","json_url":"https://alion.io/job/lucio-senior-backend-engineer.json","meta":{"generated_at":"2026-10-29T20:01:34Z","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":29798,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-30T00:00:00Z"}},"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":3002},"rest":"https://alion.io/mcp/rest/get_company?id=3002"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Flucio-senior-backend-engineer"},{"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%2Flucio-senior-backend-engineer"},{"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%2Flucio-senior-backend-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/lucio-senior-backend-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Flucio-senior-backend-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":730024}},{"tool":"search_jobs","arguments":{"company":"lucioai.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":730024},"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. Docs: https://alion.io/developers"}}