Founding Backend Engineer
Novaflow (YC S25)
About Novaflow Novaflow is the AI data analyst for biology labs. Analytics is the bottleneck for scientific discovery. Biologists have to outsource analysis to expensive bioinformaticians or core services and wait weeks or months for results. We're solving this by putting analysis directly back into the hands of researchers, allowing them to go from raw data to publication-ready insights and visualizations in days instead of months. We're well-funded, growing extremely fast, and backed by leading investors including Y Combinator and BioRender. This role is in-person at our San Francisco office. The founding team works side by side every day to make fast decisions and ship. Responsibilities Build and maintain APIs and backend services in Python, Go, or similar Set up and manage cloud infrastructure on AWS or GCP Work with SQL and NoSQL databases, optimize queries, design data models Build data pipelines and integrations with third-party services Manage data infrastructure (storage, compute) for large-scale workloads Set up CI/CD pipelines, monitoring, and observability Help build the engineering team and establish how we work Requirements Bachelor\'s or Master\'s in Computer Science, Engineering, or related field (or equivalent experience) 2+ years building and running backend services in production Strong with cloud platforms, Terraform, Docker, and Kubernetes Deep SQL knowledge and data modeling experience Proficient in Python and Node.js for APIs and services Experience with microservices, service-to-service communication, and API design Familiar with CI/CD, monitoring, and keeping production systems healthy Good communicator who can explain technical decisions clearly Nice to Have Experience with computational biology or scientific computing workloads Go experience Experience with event-driven architectures or message queues (Kafka, RabbitMQ, SQS) Startup background Why Join Us? Competitive salary and meaningful equity as a founding team member 401(k) with company match Unlimited PTO + federal holidays Monthly health and wellness stipend Meals covered when you're in the office (lunch daily, dinner when you're working late) Team offsites and company events If you're curious about being a founder one day, this is your front-row seat. You'll work side by side with the founders and have full visibility into product strategy, customer conversations, and fundraising as we scale. #J-18808-Ljbffr Novaflow (YC S25)
- ...We’re looking for a seasoned backend engineer to own key data, search, AI, and core backend infrastructure projects as we rapidly evolve Tako... ...serve millions of users Early-stage startup experience or founding experience Side projects, papers, etc. that demonstrate a genuine...Suggested
- Instant is seeking a Founding Backend Engineer to join their team in San Francisco, focusing on building infrastructure for a database company. The role involves tackling complex backend challenges such as managing high connection volumes and enhancing system capabilities...Suggested
$175k - $300k
...300K cash. You will own a meaningful piece of the company. High talent density: Be a part of a great founding team in SF. Shivaal Roy (CTO) was a founding engineer at Glean ($100M+ ARR today) and managed the Assistant and Search teams, where he solved similar problems...Suggested- Job Overview We’re looking for a Founding Backend Engineer to join our team in San Francisco. Responsibilities We’re building a database company. We need someone who enjoys hard problems, has large scope and agency, and has experience working in Clojure. Our current stack...SuggestedRelocation
- ...companies while building a long-term career. Job Title: Founding Infrastructure & Reliability Engineer Location | On-Site — San Francisco, CA Time... ...production infrastructure or high-throughput backend systems - Strong debugging ability across services,...Suggested
- ...Job Description Job Description Our client, a fast-growing AI B2B education startup, is hiring a Founding Backend Engineer to own and lead the core systems that make their AI assistant work. This is a high-ownership, high-autonomy role at a company with real paying...Immediate startFlexible hours
- ...Job Description Job Description We are hiring a Founding Software Engineer in San Francisco. We are building a small, talent-dense team... ...developer experience. Architect, build, and scale core backend systems powering document intelligence and VLM-based workfows...
$150k - $300k
...equity About the Company A Seed-stage AI company (founded 2024, $7.5M raised) building production-grade systems... ...people · Industry: AI Tools. The Role A founding, backend & infrastructure-heavy engineering role on a small, talent-dense team. You'll own production...Full timeH1bWork at officeVisa sponsorship- Jarmin, a San Francisco-based startup, seeks a founding Backend Engineer to architect and scale the distributed systems powering our AI agents. You will own critical infrastructure from day one, delivering reliable, scalable workflows and building internal tools to accelerate...
- davidjoseph-co is seeking a Founding Backend Engineer to take on critical backend responsibilities in San Francisco. This role emphasizes building scalable systems and offers end-to-end ownership of critical production infrastructure. The ideal candidate should possess...
- Zania is seeking a Founding Software Engineer (Mid-Senior Level) to join its team in San Francisco, California. In this backend-focused role, you will engineer core product features and build robust systems for AI-driven compliance. The ideal candidate has over five years...
$130k - $180k
Job Title Founding Backend Engineer Salary $130k-$180k + Equity Company Description Jarmin is a San Francisco-based YC F25 startup building AI employees for human-level roles, founded by an elite engineering team from Meta SuperIntelligence Labs, Apple, and AWS. Job...$150k - $250k
AgentMail (YC S25) is seeking a Founding Engineer in San Francisco to design intuitive APIs and architect high-performance systems. This role requires prior engineering experience and a proven ability to ship software used by real users. The compensation package includes...- Casa is seeking a founding Senior Backend Engineer in San Francisco to lead the development of robust backend systems and define the culture of our engineering team. You will design and optimize APIs, ensuring scalability and reliability as we grow our member base. If...
- ...generative creativity. We're well-capitalized and looking for a founding engineer to own the back end of Variant. The ideal candidate: Has impactful experience at a company known for its sophisticated backend, contributed to a notable open source project, or has an...
$60k - $180k
Join to apply for the Founding Backend Software Engineer role at Rebolt (YC W25) Rebolt is building the next‑generation no‑code platform that empowers companies to create and deploy custom full‑stack applications in minutes. Our mission is to enable both technical and...Internship$150k - $300k
Compound AI seeks exceptional backend engineers in San Francisco to build the data pipelines that drive its AI agents. You will work directly with the founding team to integrate diverse financial data sources, ensuring precise query performance. The ideal candidate has...- A cutting-edge AI startup in San Francisco is seeking a Founding Engineer with 4+ years of backend experience. You will design and scale backend systems, mentor junior engineers, and tackle technical challenges in the food-tech space. Ideal candidates will have deep expertise...
$130k - $200k
...San Francisco, is looking for a talented engineer to architect and own core systems that... ...leverage expertise in high-performance backend systems, especially in Python, to deliver... ...-paced environment alongside a world-class founding team. #J-18808-Ljbffr Kastle (YC S24)- A leading AI startup in San Francisco is seeking a Lead Founding Backend Engineer to architect and implement the core backend systems for a consumer AI social platform. You will design high-performance infrastructure while collaborating on frontend features. The ideal candidate...
$240k - $310k
Albert Bow in San Francisco is seeking a Founding Engineer to join their innovative AI startup. This critical role offers an impressive salary... ...$240,000 - $310,000 as you will be pivotal in architecting backend infrastructure and driving product decisions. Ideal candidates...- An innovative startup seeks a founding engineer to lead backend development for a groundbreaking code generation tool. This role offers the opportunity to make a significant impact from day one, as you build a system that enhances creativity in software design. You will...
$175k - $195k
The Electric Plant Co in San Francisco is seeking a Founding Software Engineer to lead the software platform development. This role involves building and maintaining backend systems that integrate our IoT hardware with AI capabilities, focusing on creating reliable and...$150k - $300k
Unsiloed AI — Founding Backend Engineer Type: Full-time | On-site | San Francisco, CA Compensation: $150,000-$300,000 + 0.1%-1% equity Hiring count: 1 Visa sponsorship: Yes — H-1B, O-1, OPT Reports to: Founders / research team About Unsiloed AI Unsiloed converts complex...Full timeH1bWork at officeVisa sponsorship- ...cutting-edge startup in San Francisco, is seeking a seasoned founding engineer to lead the design and development of their Telemetry Data Management... ...Platform. In this pivotal role, you will develop scalable backend systems, integrate with open technologies like OpenTelemetry,...
- Job Openings Lead Founding Backend Engineer (Node, Python, React, AI/ML) - Startup Experience About the job Lead Founding Backend Engineer (Node, Python, React, AI/ML) - Startup Experience About the Company One of our prestigious building the first proactive intelligence...
- Jack is seeking a Founding Engineer in San Francisco to help build the ad network for AI, blending backend engineering with ML and infrastructure. You will own features end-to-end, collaborate with the founding team, and ship high-quality systems in a fast-paced startup...
- Job Description Early ownership + equity. Build AI agents that replace legacy ERPs for real operators. Restrictions No telecommuting Agencies are OK Requirements Work experience: 3-6 years Python FastAPI Django AWS Lambda AWS Step Functions AWS RDS PostgreSQL pgvector LangChain...Work experience placementRemote work
$130k - $180k
...enterprises. Qualifications 5+ years experience in full‑stack engineering, with senior‑level expertise Experience building 0 → 1 in a... ...software Experience in scaling and working with enterprise clients Founding engineer experience at pre‑seed through series A or B startup...- ...Tiger is a leading software company. Example org allows real-time collaboration on important example workflows. Founded in 2012 we have over 10,000 customers worldwide and are backed by fantastic investors such as Example Capital. Example has raised its Series C and is...Work at officeWorldwideFlexible hours
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