{"id":96867,"url":"https://alion.io/job/arena-senior-software-engineer-data-infrastructure-2","title":"Software Engineer - Data Infrastructure","company":{"id":1017,"name":"Arena","domain":"arena.ai","url":"https://alion.io/company/arena","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":83,"open_postings":13,"ghost_share":0,"stale_share":0.462,"repost_share":0,"time_to_fill_p50_days":73,"computed_at":"2026-10-16T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["San Francisco, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":150000,"max":350000,"currency":"USD","period":"year","gross":null,"usd_annual":350000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Databricks","optional":false},{"name":"Python","optional":false},{"name":"Ray","optional":false},{"name":"Scala","optional":false},{"name":"Snowflake","optional":false},{"name":"Spark","optional":false},{"name":"SQL","optional":false},{"name":"Delta Lake","optional":true},{"name":"Edge AI","optional":true},{"name":"Machine Learning","optional":true}],"status":"live","first_seen_at":"2025-12-18T09:26:33Z","employer_posted_date":"2025-12-18","last_verified_at":"2026-10-16T21:06:21Z","board_verified":true,"closed_at":null,"days_open":302,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":301},"description":"About Arena Intelligence\nArena is the platform for evaluating how AI models perform in the real world. Founded by researchers from UC Berkeley's SkyLab, we're on a mission to measure and advance the frontier of AI for real-world use, and to build the foundation for everyone to understand, shape, and benefit from it.\nTens of millions of people use Arena each month to evaluate how frontier systems handle the work they actually do. The preferences they share power the most transparent, rigorous, and human-centered evaluations in AI. Leading AI labs, enterprises, and independent researchers rely on our work and open datasets to understand how models behave in real workflows: agentic coding, creative generation, professional productivity, and beyond. We go beyond leaderboards and decompose what human experience reveals about AI, so models advance toward the work people actually do.\nWe're a team of researchers, academics, builders, and creatives from UC Berkeley, Google, Stanford, and DeepMind. We seek truth, move fast, and value craftsmanship, curiosity, and impact over hierarchy. We're building a company where thoughtful, curious people from all backgrounds can do their best work together, in an office culture that radiates excellence, energy, and focus.\nAbout the Role\nArena Intelligence is seeking a Data Infrastructure Software Engineer to join our team and build the data pipelines and infrastructure that powers real-world AI evaluation. You'll play a crucial role in designing and building the data pipelines that process and analyze tens of millions user vote data, directly impacting how we understand and evaluate AI model performance. This role is ideal for someone who thrives in fast-moving environments and interested in building products to ensure accurate and fair evaluation of human preferences across different models, which will shape the direction of future AI development.\nAs an early member of our data engineering team, you'll partner closely with researchers, engineers, and product leadership to retrieve valuable data and insights from human votes and feedback. You'll help us move fast while staying rigorous, improving data quality, scaling our infrastructure to new levels, and deepening our ability to compare frontier models and predict human preferences.\nYou’ll\nDesign and build robust data pipelines to ingest, process, and transform user vote data to features essential for model performance evaluation.\n\nCollaborate with researchers and product leadership to understand product goals and necessary data.\n\nDesign and implement solutions to generate result dashboards and reports, providing useful information for the public, model providers, and researchers.\n\nEnsure the integrity, data quality, and reliability of the pipelines.\n\nScale our data infrastructure to accommodate increasing data volumes and evolving analytical needs.\n\nYou’ll have\n5+ years of experience in software engineering, with a dedicated focus on data engineering and big data technologies\n\nProficiency in SQL and at least one programming language commonly used for data analysis (Python (preferred), Scala, R).\n\nHands-on experience with data processing and pipeline frameworks (Apache Spark, Ray Data, etc.) and at least one popular big data analytics platform (Databricks, Snowflake).\n\nDemonstrated experience in designing, implementing, optimizing, and debugging production data pipelines.\n\nBonus Points\nPrior work in data analytics or datalake platforms.\n\nExperience in advanced data analysis tools, such as Delta lake, streaming tables.\n\nExposure to machine learning is a plus.\n\nWhat we offer\nWe offer competitive compensation aligned to the markets where our team members are based. The compensation range for each role is listed on its posting and will depend on the candidate's experience and work location.\n\nComprehensive health and wellness benefits, including medical, dental, vision, and additional support programs.\n\nThe opportunity to work on cutting-edge AI with a small, mission-driven team\n\nA culture that values transparency, trust, and community impact\n\nCome help build the space where anyone can explore and help shape the future of AI.\nArena Intelligence provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability, genetics, sexual orientation, gender identity, or gender expression. We are committed to a diverse and inclusive workforce and welcome people from all backgrounds, experiences, perspectives, and abilities.","description_format":"text","description_chars":4575,"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":["Recommendation Systems","Marketing & Sales AI"],"lifecycle":[{"event":"open","at":"2025-12-18T09:26:33Z"},{"event":"open","at":"2026-09-25T16:49:00Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 1","filings_12m":1,"filings_prev_12m":1,"green_card_filings_12m":0,"median_offered_wage_usd":252500,"route":null,"cap_exempt":false,"checked_at":"2026-10-15T11:24:14+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)"],"filings_for_role_12m":0}],"liveness":{"score":10,"band":"cold","label":"Long shot","p_open":1,"p_active":0.358,"p_room":0.28,"age_days":301,"expected_fill_days":73,"reasons":["conf:2","velocity","win:tail","crowd:"],"computed_at":"2026-10-16T05:45:00Z"},"pay":{"stated_usd_annual":350000,"is_top_pay":true},"html_url":"https://alion.io/job/arena-senior-software-engineer-data-infrastructure-2","json_url":"https://alion.io/job/arena-senior-software-engineer-data-infrastructure-2.json","meta":{"generated_at":"2026-10-16T23:26:13Z","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":5418,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-17T00:00:00Z"}},"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":1017},"rest":"https://alion.io/mcp/rest/get_company?id=1017"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Farena-senior-software-engineer-data-infrastructure-2"},{"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%2Farena-senior-software-engineer-data-infrastructure-2"},{"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%2Farena-senior-software-engineer-data-infrastructure-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/arena-senior-software-engineer-data-infrastructure-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Farena-senior-software-engineer-data-infrastructure-2"}]}