65 founding software engineer jobs at 42 companies in Bohemia, NY

1w
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Founding Software Engineer, Full-Stack & Platform
Boston or New York City
$160k-$190k/yr HybridFull Time
Vincer
Vincer: AI decision-support software gives life sciences and medtech sales teams continuous field guidance and manager reinforcement.
5+ YOERequires 5+ years of full-time software engineering experience, full-stack development with strong backend/API/platform skills, real-time or low-latency systems experience, and end-to-end cloud infrastructure ownership.
CRM, Veeva, Salesforce, Slack, Microsoft Teams
4d
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Founding Engineer
New York City, New York, United States
$150k-$300k/yr OnsiteFull Time
Asymptote Labs
Asymptote Labs: AI security giving enterprises telemetry, detection, and response controls for agent activity.
5+ YOE5+ years building production software, infrastructure, developer tools, data platforms, or distributed systems; strong backend, distributed systems, databases, APIs, architecture, and product engineering skills.
Beacon, MCP, eBPF
3mo
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Founding Engineer
New York City, New York, United States
$170k-$200k/yr OnsiteFull Time
Alden Labs
Alden Labs: Private AI healthcare software serving home care agencies with agents that automate coordination, scheduling, and communications.
3+ YOEFull-stack software engineer with 3+ years, skilled in React/NextJS, Express, PostgreSQL; strong ownership; healthcare and AI interest; able to ship features end-to-end.
React, NextJS, Express, PostgreSQL
6d
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Founding Engineer
New York City, New York, United States
$137k-$190k/yr OnsiteFull Time
Clera
Clera: AI-powered talent agent matching candidates to startup roles.
3+ YOE3+ years of software engineering experience, production AI/ML experience, Python and TypeScript proficiency, data modeling and scalable systems expertise, and early-stage startup experience.
Python, TypeScript
3mo
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Founding Software Engineer, Platform
New York City, New York, United States
$190k-$260k/yr HybridFull Time
GovWell
GovWell: N AI software providing permitting and licensing tools to municipal and county governments.
5+ YOE5+ years backend/infrastructure/platform experience; strong distributed systems; ownership of CI/CD, observability, incident response; proficient in Node/TypeScript; startup-oriented operator.
AWS, Kubernetes, Datadog, GitHub Actions, React, TypeScript, Node.js, GraphQL, PostgreSQL, RedwoodJS, OpenAI API
3mo
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Founding Engineer
New York, New York, United States
$140k-$500k/yr OnsiteFull Time
Rehearsals Research
Rehearsals Research: AI customer-simulation platform that helps marketing teams predict consumer behavior with digital twins of real people.
3+ YOEBachelor's in CS/Math/Physics or equivalent; 3+ years; proven shipping software; ability to work in NYC in-person.
TypeScript, Next.js, React, CI/CD, data scraping, infrastructure tooling
3mo
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Founding Engineer
New York, New York, United States
HybridFull Time
Jetty
Jetty: Private AI health software helping people with chronic symptoms track patterns and prepare for medical care.
3+ YOE3–8+ years of software product experience; strong backend, end-to-end product shipping; familiarity with APIs, data models, CI/CD, observability; startup mindset; privacy-focused health tech experience bonus.
Go, Rust, Java, Swift, Frontend
4d
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Founding Engineer
New York City, New York, United States
OnsiteFull Time
Andreessen Horowitz
Andreessen Horowitz: Private venture capital firm investing in startups from seed through growth stages and helping founders build companies.
3+ YOE3+ years of engineering experience, Python and TypeScript proficiency preferred, strong data modeling fundamentals, fast product delivery, sound judgment with coding agents, and ability to learn from feedback.
Python, TypeScript
1mo
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Founding Software Engineer
New York City, New York, United States
HybridFull Time
Rollout
Rollout: Private software providing a universal API for real-estate and mortgage CRMs, transaction systems, and loan-origination systems.
Fluency with modern AI coding tools, solid CS fundamentals, ability to ship software, fast learner, strong communication, and willingness to work in person with customers.
Claude Code, Cursor, Copilot
2w
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Software Engineer (Founding Team)
New York City, New York, United States
$180k-$220k/yr OnsiteFull Time
Riven Systems
Riven Systems: Private industrial-chemistry startup developing AI-accelerated separation technology for domestic critical-minerals processors.
4+ YOE4+ years building backends and user interfaces for scientific or engineering software, with experience validating computational output at scale and deploying models. Requires scientific curiosity, communication, and agentic engineering skills.
AI, machine learning, agentic frameworks, tool APIs, distributed test suites, numerical testing, versioning, sandboxing, observability, numerical optimization, nonlinear solvers, automatic differentiation, GPU programming, scientific visualization, LLM applications
3d
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Founding Engineer
New York City, New York, United States
$125k-$175k/yr OnsiteFull Time
Ceno Group
Ceno Group: US fintech brokerage giving retail investors access to Korean and Japanese equities and cross-border financial services.
5+ YOE5+ years building and operating production backend systems; fluency in Go, TypeScript, Python, Java, or Rust; experience with data infrastructure, scalable systems, testing, observability, and incident response.
Go, TypeScript, Python, Java, Rust, PostgreSQL, Redis, Interactive Brokers, Apex, DriveWealth, Alpaca, FIX
1mo
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Founding Engineer
New York City, New York, United States
$150k-$180k/yr OnsiteFull Time
Company Ventures
Company Ventures: Private early-stage venture capital firm investing in technology startups and supporting founders through its residency and venture studio.
Proven experience building systems from scratch, owning architecture and data pipelines, strong technical judgment, high ownership, comfort with ambiguity, and interest in healthcare and AI-driven products.
2w
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Founding Software Engineer
New York City, New York, United States
$150k-$250k/yr OnsiteFull Time
Continual Research
Continual Research: AI-native hedge fund building automated investment research and strategies for retail and institutional investors.
2+ YOERequires 2–5 years building and shipping at an early-stage tech startup or quant fund, with production systems experience in distributed pipelines, data platforms, low-latency services, or ML infrastructure.
HSA, FSA, 401(k), CI
1mo
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Founding Engineer, Open Source
New York, New York, United States
$225k-$300k/yr OnsiteFull Time
Datalab
Datalab: Document intelligence research lab that trains models and provides enterprise document-processing infrastructure for AI labs and businesses.
5+ YOE5+ years building production software, strong open-source contributions, fluent in Python, experience creating technical content and engaging developer communities.
Python, GitHub, Discord, X, Reddit, marker, surya, chandra, lift, SDK, API, YouTube, Twitch, OCR
2mo
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Senior / Staff Founding Engineer
New York City, New York, United States
$250k-$320k/yr OnsiteFull Time
Rovi Health
Rovi Health: AI healthcare concierge and virtual clinic helping employees in self-funded health plans access better-value care.
8+ YOE8+ years building software with deep experience in Python, React, and TypeScript; ownership of products end-to-end; production AI/ML and LLM/agent experience; systems and scale experience; healthcare/fintech a plus.
Python, React, TypeScript, LLM
2w
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Founding Engineer - NYC
New York City, New York, United States
$175k-$250k/yr OnsiteFull Time
Corridor
Corridor: AI-native health insurance brokerage helping small businesses choose, enroll in, and manage employee benefits.
Demonstrated technical ownership, high-stakes systems judgment, sound decision-making with incomplete specifications, production shipping velocity, and strong Python and TypeScript proficiency.
Python, TypeScript, React, MCP, LLM
3mo
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Founding AI Engineer
New York City or United States
$160k-$220k/yr OnsiteFull Time
Nolla Health
Nolla Health: AI-guided digital-health offering dermatological skincare and telehealth services.
4+ YOE4+ years backend, platform, or product engineering; ships own projects; strong TS and Python; AI tooling experience; small team experience; ability to scope and ship.
TypeScript, Python, Node.js, PostgreSQL, AWS, OpenAI API, Anthropic API, EMR systems, Eval frameworks
1w
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Founding Engineering Team
New York City, New York, United States
$200k-$280k/yr OnsiteFull Time
Altis
Altis: Venture intelligence platform helping investors make faster decisions on Series A/B/C companies through primary research.
Track record shipping adopted software, ownership of delivery timelines, strong technical and non-technical communication, and experience with AI-native, LLM- or RAG-powered products. Engineering leadership experience is preferred.
AI, LLM, RAG, API, MCP
3w
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Founding Research Engineer
New York City or San Francisco
$215k-$330k/yr OnsiteFull Time
Ambral
Ambral: AI customer-success platform for businesses that monitors accounts, identifies churn and expansion opportunities, and automates follow-up actions.
4+ YOE4+ years building production software or ML systems, including 2+ years with RL environments or evaluation/agent infrastructure; strong software engineering, data processing, reproducibility, and evaluation skills.
1mo
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Founding Engineer
New York City, New York, United States
$175k-$250k/yr OnsiteFull Time
Neptune
Neptune: Lawyer-led online prenup and financial-planning platform helping couples navigate legal and financial decisions with vetted independent experts.
3+ YOE3–6 years full-stack experience, AI-native mindset, strong product orientation, ability to own features end-to-end; experience with LLMs and shipping production software.
React, TypeScript, TanStack, Go, LLMs

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