{"id":783013,"url":"https://alion.io/job/enersee-backend-software-developer-energy-time-series-data-flows","title":"Backend Software Developer (Energy, Time Series & Data Flows)","company":{"id":691079,"name":"Enersee","domain":"enersee.ai","url":"https://alion.io/company/enersee","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Recruitee","truth_index":{"grade":"B","score":75,"open_postings":4,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-03T05:54:40Z"}},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Antwerp, Belgium"],"countries":["BE"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":35000,"max":50000,"currency":"EUR","period":"year","gross":null,"usd_annual":56084},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"CI/CD","optional":false},{"name":"FastAPI","optional":false},{"name":"Python","optional":false},{"name":"SQLAlchemy","optional":false},{"name":"Time Series","optional":false},{"name":"AWS","optional":true},{"name":"GCP","optional":true},{"name":"SLI/SLO/SLA","optional":true}],"status":"live","first_seen_at":"2026-01-14T16:18:02Z","employer_posted_date":"2026-01-14","last_verified_at":"2026-11-04T01:40:19Z","board_verified":true,"closed_at":null,"days_open":293,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":292},"description":"Enersee is scaling its platform and we’re looking for a backend software developer to build the services, integrations, and data flows that power our energy efficiency product. Your focus is production-grade backend engineering: designing systems that reliably move data from “source → validated → served,” and keep working under real-world conditions.\nWhat you’ll do\nBuild backend services that run in production\nDesign and implement scalable backend services (Python, APIs, internal services).\n\nOwn reliability: monitoring, logging, alerting, performance, debugging, incident follow-up.\n\nWrite clean, testable code and improve existing architecture where needed.\n\nBuild and evolve data flows (core)\nDesign and implement end-to-end data flows: ingestion → validation → AI analytics → exposure (API/product).\n\nEnsure data correctness and traceability (versioning, lineage, retries, idempotency, backfills).\n\nImprove throughput and latency of critical flows; handle spikes and partial failures gracefully.\n\nBuild tooling around flows: observability dashboards, failure handling, replay/backfill utilities.\n\nIntegrations + time series pipelines\nBuild and maintain connectors for time series energy & water data and related metadata.\n\nHandle messy real-world inputs: missing intervals, time zones/DST, duplicates, late-arriving data, inconsistent schemas.\n\nWork with customers/partners to troubleshoot and stabilize integrations.\n\nCollaborate with data/AI without being ML-first\nCollaborate with data/ML teammates so the backend supports model deployment and feature delivery.\n\nTurn product requirements into robust backend implementations (APIs, workflows, pipelines).\n\nRequirements\nMust-have: strong backend development\nSolid experience building production backends in Python (FastAPI, SQLAlchemy, and similar)\n\nStrong software engineering fundamentals: architecture, testing, CI/CD habits, code reviews, performance, code ownership & reliability mindset.\n\nExperience designing and operating data flows (or event-driven workflows) in production.\n\nNice-to-have: time series + energy efficiency\nHands-on experience with time series data (processing, validation, edge cases).\n\nExperience or strong affinity with energy efficiency / buildings / energy monitoring / utilities / IoT contexts.\n\nExperience with streaming or message-based systems (queues/events), or batch pipelines with backfills.\n\nCloud experience (AWS/GCP), containers, infrastructure-as-code.\n\nExperience improving operational maturity: SLOs, alerting, runbooks, incident reviews.\n\nDon’t check every box?\nSmart people don’t always follow straight lines. If you believe in what we’re doing and think you can help us grow, we want to hear from you.\nWhat we offer you in return\nWe want you to grow with us and benefit from the impact you make.\nCompensation & Benefits\nCompetitive gross base salary depending on your experience\n\nPerformance bonus (up to €25K/year)\n\nStock options-you grow, we grow\n\n13th month salary + double vacation pay\n\nCompany car (worth €35-50K) or mobility budget + extra salary\n\nMeal vouchers (€8/day) + Eco vouchers (€250/year)\n\nCharging card for your EV (also usable privately)\n\nHospital insurance for you (free) + discounts for family\n\nLaptop + smartphone, incl. €30/month for phone & internet\n\nEnergetic offices in Brussels and Antwerp + hybrid work flexibility\n\nFun events, team activities, and milestones worth celebrating\n\nFYI - We are growing fast, which is asking for a little more face 2 face interaction to also move fast.\nOur work setting is hybrid, and our tech team works from the office in Antwerp and Brussels. So yes, you can of course also take some days to focus from home, but we can’t have you working fully remote for now.\nWant to help build the clean energy future through data, tech, and purpose?\nApply now and let’s talk.","description_format":"text","description_chars":3828,"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":["Hybrid work","Stock options"],"hiring_locations":[{"name":"Belgium","iso":"BE","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Energy Efficiency","Energy Management"],"lifecycle":[{"event":"open","at":"2026-09-12T01:08:24Z"},{"event":"open","at":"2026-09-26T12:18:20Z"}],"visa":[],"liveness":{"score":5,"band":"cold","label":"Long shot","p_open":1,"p_active":0.178,"p_room":0.28,"age_days":292,"expected_fill_days":30,"reasons":["conf:5","win:tail","crowd:"],"computed_at":"2026-11-03T05:54:40Z"},"pay":{"stated_usd_annual":56084,"is_top_pay":false},"html_url":"https://alion.io/job/enersee-backend-software-developer-energy-time-series-data-flows","json_url":"https://alion.io/job/enersee-backend-software-developer-energy-time-series-data-flows.json","meta":{"generated_at":"2026-11-04T03:58:11Z","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":6139,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-05T00:00:00Z"}},"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":691079},"rest":"https://alion.io/mcp/rest/get_company?id=691079"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fenersee-backend-software-developer-energy-time-series-data-flows"},{"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%2Fenersee-backend-software-developer-energy-time-series-data-flows"},{"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%2Fenersee-backend-software-developer-energy-time-series-data-flows"},{"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/enersee-backend-software-developer-energy-time-series-data-flows\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fenersee-backend-software-developer-energy-time-series-data-flows"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":783013}},{"tool":"search_jobs","arguments":{"company":"enersee.ai","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":783013},"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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