{"id":3104751,"url":"https://alion.io/job/fibr-product-engineer-2","title":"Product Engineer","company":{"id":29352,"name":"Fibr","domain":"fibr.ai","url":"https://alion.io/company/fibr","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Wellfound","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"junior","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":8500,"max_usd":23000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":43},"experience_years_min":1,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Celery","optional":false},{"name":"FastAPI","optional":false},{"name":"LLM","optional":false},{"name":"LLM Guardrails","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Python","optional":false},{"name":"Redis","optional":false},{"name":"JavaScript","optional":true},{"name":"Langfuse","optional":true},{"name":"LangSmith","optional":true},{"name":"Multi-Agent Systems","optional":true},{"name":"Prometheus","optional":true},{"name":"RAG","optional":true}],"status":"live","first_seen_at":"2026-10-22T18:35:15Z","employer_posted_date":null,"last_verified_at":"2026-10-22T18:35:15Z","board_verified":false,"closed_at":null,"days_open":17,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":17},"description":"Fibr is building the agentic web experience layer, turning every URL into an intelligent agent that senses intent, makes decisions, and adapts in real time. Our agents personalize the full journey, running long LLM workflows against live customer accounts and millions of sessions. You'll be a senior technical voice on the team shaping architecture, making the hard calls on system design, and owning the most complex parts of the platform. You'll work directly with the founding team and have real influence over where the product goes technically.\n\nResponsibilities: \nOwn the hardest engineering problems: durable workflows, eval infrastructure, and agent reliability at scale.\nSet the technical direction for new surface area agent architectures, data models, and integration patterns.\nShip AI-powered features end-to-end and hold the bar for quality across the team.\nDesign systems that survive rate limits, partial failures, flaky third-party APIs, and real production load.\nBuild the evals, guardrails, and instrumentation framework the whole team ships against.\nSit at the table for architecture decisions and drive them forward.\nMentor and raise the bar for the broader engineering team.\n\nRequirements: \nStack: Python FastAPI Temporal PostgreSQL MongoDB Redis.\n1-5 years of production backend experience.\nPython is your primary language, and we move fast.\nHas shipped LLM-powered features to real users at scale, not demos or side projects. Talk about what broke, how you debugged it, and what you rebuilt.\nHas designed and owned eval infrastructure for LLM systems; show us the harness, the dataset, and how it drove ship/no-ship decisions.\nHas taken systems from 1 to 100 not just 0 to 1 You've dealt with scale, reliability, and production incidents firsthand.\nDeep experience with durable workflow systems in production, such as Temporal, Celery, or similar at real scale.\nStrong system design fundamentals: you think about failure modes before you write the first line.\nStrong product thinking alongside engineering depth: you catch the product gap before the PM does.\nAsks clarifying questions before jumping into solutions. You understand the problem before you build the solution.\nHigh-ownership decisions are yours to make, not to wait for.\n\nNice-to-haves: \nMulti-agent architectures or complex tool-use pipelines in production.\nExperience with rate-limited third-party APIs at ad platforms, CRMs, and analytics tools.\nVector stores, RAG pipelines, or retrieval systems in production.\nLLM observability and tracing: LangSmith, Langfuse, Prometheus, or similar.\nTime spent as a founding engineer or early engineer at a seed/Series A startup.\nHas mentored junior engineers or led technical decisions in a small team.\nStrong product sense: you catch the system design issue and the UX issue.\n\nThis role is not for you if: \nYour AI experience is limited to personal projects or hackathons.\nYou've only built demos or PoCs that never reached real users.\nYou need detailed specs before you can start building.\nYour primary language is JavaScript or Java.\nYou've only ever worked at large companies where someone else made the hard calls.\nSkills\nCelery, LLM, Python, Temporal","description_format":"text","description_chars":3186,"description_truncated":false,"requirements":{"experience_years_min":1,"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":["Marketing Automation","Digital Marketing","Marketing & Sales AI"],"lifecycle":[{"event":"open","at":"2026-10-22T18:35:15Z"}],"visa":[],"liveness":{"score":46,"band":"ok","label":"Likely open","p_open":0.85,"p_active":0.723,"p_room":0.75,"age_days":16,"expected_fill_days":23,"reasons":["seen:16","win:late","comp:junior"],"computed_at":"2026-11-08T05:47:12Z"},"pay":null,"html_url":"https://alion.io/job/fibr-product-engineer-2","json_url":"https://alion.io/job/fibr-product-engineer-2.json","meta":{"generated_at":"2026-11-08T19:38:18Z","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":41048,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-09T00:00:00Z"}},"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":29352},"rest":"https://alion.io/mcp/rest/get_company?id=29352"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ffibr-product-engineer-2"},{"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%2Ffibr-product-engineer-2"},{"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%2Ffibr-product-engineer-2"},{"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/fibr-product-engineer-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ffibr-product-engineer-2"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3104751}},{"tool":"search_jobs","arguments":{"company":"fibr.ai","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3104751},"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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