{"id":164857,"url":"https://alion.io/job/mosaic-software-engineer","title":"Software Engineer","company":{"id":58686,"name":"Mosaic","domain":"mosaic.us","url":"https://alion.io/company/mosaic-us","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":75,"open_postings":3,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-16T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"junior","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":102000,"max_usd":208000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":985},"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"Agentic Workflows","optional":false},{"name":"Go","optional":false},{"name":"Python","optional":false},{"name":"React.js","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-01-20T03:48:33Z","employer_posted_date":"2026-01-20","last_verified_at":"2026-10-16T15:31:42Z","board_verified":true,"closed_at":null,"days_open":269,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":269},"description":"About Mosaic\nMosaic is the AI-driven deal modeling platform for private markets, used by leading investors and advisors including Warburg Pincus, CVC, New Mountain, and Evercore. Mosaic automates and standardizes core deal analyses-such as LBOs and DCFs-so investment teams can move faster, reduce spreadsheet risk, and spend more time on investment judgment.\nMosaic’s platform combines deterministic, rules-based calculations with AI-powered ingestion and agentic workflows to generate replicable, audit-ready outputs that private equity, private credit, and investment banking teams can trust across billion-dollar deals.\nMosaic is on a mission to build the AI-driven operating system for the world’s most sophisticated investors and their advisors. We’re growing quickly and are hiring across engineering, product, customer enablement, and go-to-market teams.\nFor those excited to sit at the intersection of high finance and technology, Mosaic offers a rare opportunity to shape how the industry operates for decades to come.\nRead more about our story:\nBloomberg\n\nFinancial Times\n\nNY Post\n\nAbout the Role\nAs a Fullstack Engineer at Mosaic, you’ll build product experiences that investors and bankers rely on to run high-stakes deal processes. You’ll work across the stack-from sleek, high-trust interfaces to backend services that power modeling, ingestion, collaboration, and workflow automation.\nThis is a role for builders who want real ownership. You’ll ship features end-to-end, collaborate tightly with product and design, and help establish the technical foundations for a platform used in mission-critical environments. You’ll tackle challenging problems like structured financial computation, document ingestion, auditability, permissions, real-time collaboration, and performance at scale.\nYour work will directly impact how the world’s most sophisticated financial teams evaluate acquisitions, credit investments, and major corporate decisions.\nKey Responsibilities\nBuild End-to-End Product Experiences\nOwn features from idea → design → implementation → testing → deployment\n\nBuild intuitive, polished UI workflows that feel fast and trustworthy\n\nShip backend APIs and services that support complex user actions and data flows\n\nDesign Systems that Scale\nImprove the architecture of core systems powering modeling and analysis\n\nWrite clean, maintainable, well-tested code that raises the team’s bar\n\nEnsure performance and reliability for workflows used in live deal environments\n\nWork in a High-Trust, High-Accuracy Domain\nBuild with auditability and correctness in mind\n\nHelp define patterns for permissions, versioning, and reproducibility\n\nBalance velocity with quality in a product where accuracy matters\n\nCollaborate Deeply with Product & Customers\nPartner with product, design, and GTM teams to translate needs into product\n\nIncorporate feedback from real customer workflows (often built in Excel)\n\nContribute to roadmap shaping through technical insight and execution\n\nDrive Engineering Excellence\nParticipate in code reviews, technical design discussions, and system planning\n\nImprove developer tooling, observability, and internal infrastructure\n\nHelp define best practices as the engineering org scales\n\nWho We’re Looking For\nFullstack Product Builder\n2-6+ years of experience building modern web applications\n\nComfortable working across frontend + backend and owning features end-to-end\n\nStrong Frontend Fundamentals\nExperience building clean UIs with modern frameworks (React preferred)\n\nStrong instincts around usability, quality, and UI performance\n\nBackend & Systems Capability\nExperience building APIs and services (Node, Python, Go, etc.)\n\nStrong data modeling instincts and comfort working with relational databases\n\nFamiliarity with cloud infrastructure and production systems\n\nHigh Ownership / Startup Mentality\nSelf-starter who thrives in fast-moving, unstructured environments\n\nBias toward action, shipping, and iterating quickly with the team\n\nThoughtful Collaborator\nClear communicator who enjoys working cross-functionally\n\nExcited to pair, review code, and build internal momentum\n\nBonus (Not Required)\nExperience building tools for finance, analytics, or high-compliance workflows\n\nFamiliarity with AI product patterns (LLMs, agents, structured extraction)\n\nExperience with workflows involving spreadsheet-like interactions\n\nExposure to observability tooling, performance profiling, or infra work\n\nWhy Join Mosaic?\nBuild the AI-powered modeling and workflow platform for private markets\n\nWork on hard technical problems with real-world stakes and complexity\n\nJoin a team of top-tier operators across finance and technology\n\nHave major product and technical influence as the company scales\n\nShip software that immediately impacts how the world’s top firms make decisions\n\nPlay a key role in shaping Mosaic’s product roadmap and influencing its growth.\n\nEnjoy opportunities for career growth and leadership in a dynamic, fast-paced environment.\n\nMake a tangible impact by helping customers succeed and drive innovation in the industry.\n\nWhat’s in it for you?\nThis is a full-time position with:\nA competitive base salary; and\n\nAn early-stage start-up equity package designed to create life-changing wealth when we win as a team.\n\nOther Perks & Benefits:\nHealth, vision & dental coverage\n\nUnlimited PTO\n\nUnforgettable team building events, offsites, and happy hours (Feel free to ask about it during the interview )\n\nIf you find yourself waking up every day seeking:\nTo be challenged by your peers\n\nTo grow your skillset in building technology businesses\n\nTo experience the joys, learning opportunities, and growing pains of doing something completely new\n\nTo have a shot at a generational wealth creation event\n\n…then Mosaic is definitely the place for you.\nWe're looking to hire people who take ownership, communicate openly, have an entrepreneurial mindset, and are excited to bring a totally new technology to an incredible industry. We encourage all candidates to apply even if your experience doesn't exactly match up to our job description. We are committed to building a diverse and inclusive workspace where everyone (regardless of age, religion, ethnicity, gender, sexual orientation, and more) feels like they belong. We look forward to hearing from you!","description_format":"text","description_chars":6302,"description_truncated":false,"requirements":{"experience_years_min":2,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity","Unlimited PTO"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Accounting & Tax Software"],"lifecycle":[{"event":"open","at":"2026-01-20T03:48:33Z"},{"event":"open","at":"2026-09-25T19:26:17Z"}],"visa":[],"liveness":{"score":2,"band":"cold","label":"Long shot","p_open":1,"p_active":0.085,"p_room":0.28,"age_days":269,"expected_fill_days":17,"reasons":["conf:3","win:tail","crowd:junior"],"computed_at":"2026-10-16T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/mosaic-software-engineer","json_url":"https://alion.io/job/mosaic-software-engineer.json","meta":{"generated_at":"2026-10-16T15:32:32Z","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":15401,"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":58686},"rest":"https://alion.io/mcp/rest/get_company?id=58686"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmosaic-software-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%2Fmosaic-software-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%2Fmosaic-software-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/mosaic-software-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmosaic-software-engineer"}]}