{"id":103882,"url":"https://alion.io/job/extend-software-engineer","title":"Software Engineer","company":{"id":8666,"name":"Extend","domain":"extend.com","url":"https://alion.io/company/extend","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":79,"open_postings":7,"ghost_share":0,"stale_share":0.857,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-17T05:46:00Z"}},"role":"Backend","role_family":"Backend","seniority":"middle","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["New York, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":136000,"max_usd":270000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":1351},"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"LLM","optional":false},{"name":"OpenAI","optional":false}],"status":"live","first_seen_at":"2026-01-22T16:07:27Z","employer_posted_date":"2026-01-22","last_verified_at":"2026-10-17T20:57:37Z","board_verified":true,"closed_at":null,"days_open":268,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":267},"description":"Extend is building a modern document processing platform, reimagined with LLMs. We're on a mission to transform how the world works with unstructured data.\nAs a Software Engineer at Extend, you’ll be responsible for building our core platform that companies use to configure, test, and deploy document processing. We’re looking to hire exceptional engineers who care about crafting intuitive product experiences, relentlessly focus on the details, and operate with high agency.\nWhy you should consider joining\nWe've grown revenue 4x last year to several million ARR, with our growth continuing to accelerate\n\nWe have a product loved by users and being used in mission-critical flows at companies like Chime, Flatiron Health, Brex, Square, Zillow, Opendoor, Checkr, and many more\n\nWe're building the next generation document processing platform - the market for document processing has expanded 1000x due to LLMs, and existing solutions are all low NPS\n\nWe're punching well above our weight, supporting customer and revenue metrics with half the team size of other startups - everyone joining at this stage will have outsized impact\n\nWe're tackling novel, unsolved problems at the intersection of LLMs, complex data processing, and human ↔ AI interfaces\n\nWe're backed by world class investors, including YC, Homebrew, investors from OpenAI, and more\n\nYou'll get a front row seat to how a successful startup is built with plenty of leadership opportunities as we grow quickly\n\nWe're a lean team, and our customer base is growing too fast for us to keep up. We're looking for talented engineers to join our founding team ahead of our next round and execute on an ambitious roadmap.\nImpact\nWe're powering mission-critical data processing at companies where if we get things wrong, there are real world impacts (e.g. missed payments, people can't move into homes on time).\nHere's a few of the complex technical problems we're working on:\nHow do we enable enterprises to deploy LLM-powered document processing into production with confidence?\n\nHow do we handle never before seen edge cases in customer data?\n\nHow do we build a self-correcting system that automatically gets better over time?\n\nHow do we enable non-technical domain experts to improve models with their expertise & business logic?\n\nHow do we help customers make tradeoffs between latency, cost, and performance?\n\nHow do we build reliable systems that can process large data streams in real-time?\n\nRole\nBuild, and maintain, durable, scalable systems capable of processing 10s of millions of data points per month.\n\nDesign and implement the best human ↔ AI interfaces for designing and understanding document processing. We are building a new territory of UX that previously did not exist. It’s up to us to discover and implement new patterns that work for our users.\n\nHave complete ownership over the work you do - as a founding team member, you’ll have the opportunity to truly own large areas of product and engineering and have direct relationship with customers.\n\nWork directly with the CEO, CTO, and other founding members and help build out our team.\n\nIdeal Candidate Credentials\nStrong foundational understanding of computer science principles through coursework, personal projects, internships, or prior work experience\n\n3+ years of professional software engineering experience (internships and part-time roles count!)\n\nEnthusiasm for building high-quality, user-facing products and interest in working across the stack\n\nDemonstrated ability to learn quickly, take ownership of projects, and work independently when needed\n\nInterest in AI/ML technologies and curiosity about building products powered by LLMs\n\nBenefits\nBeyond the below, we care deeply about each of our candidates on a personal level. We take the time to understand your needs to craft a package designed for you:\nInsurance - 90% health insurance premium coverage\n\nRelocation - for candidates based outside of NYC\n\nUnlimited PTO policy - we trust everyone like owners, take what you need\n\nDaily lunch & snacks covered (plus dinner if you're in the office late) - you'll never go hungry and you help pick the snacks\n\nUnlimited token / tooling access - no handicaps on your productivity\n\nLearning and development investment - we invest heavily in our team and support your growth\n\nExtend is an Equal Opportunity Employer. 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