Founding Backend/Infra Engineer for AI Agent APIs
AgentMail
A tech startup in San Francisco is seeking a Founding Engineer with a focus on backend and infrastructure. Responsibilities include designing APIs for AI agents, architecting scalable systems, and maintaining documentation. The ideal candidate has prior experience in a tech role, has shipped software in production, and is passionate about innovative communication solutions. The role offers a competitive salary and various benefits, including health insurance and a wellness stipend. #J-18808-Ljbffr
$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...Suggested$250k - $400k
A tech startup in San Francisco is seeking a founding engineer with strong backend and infrastructure skills. This role involves leading a team, designing intuitive APIs, and building high-performing systems that leverage AI capabilities in email communication. Candidates...Suggested- ...San Francisco-based company, is seeking an experienced engineer to develop backend systems for AI-driven commerce. The role emphasizes ownership of significant projects, working on ETL pipelines and agentic APIs. The ideal candidate has 2–5 years of engineering experience...Suggested
$200k - $350k
A leading AI evaluation platform is seeking a Backend Engineer to develop high-performance APIs and infrastructure. This role involves solving complex streaming issues, working with cloud technologies, and collaborating with founders to innovate AI solutions. Ideal candidates...Suggested$50k
...A dynamic AI startup in San Francisco is seeking a founding full-stack engineer to own the application layer of their platform. The role involves building user-facing dashboards, designing APIs, and leading architectural decisions. Ideal candidates will have experience...Suggested$150k - $220k
...Orthogonal is looking for a Founding Engineer to design and build across the entire stack from backend APIs to frontend products in San Francisco. You will collaborate closely with the founders and have an opportunity to shape engineering culture. The ideal candidate has...$200k - $280k
...Senior Backend Engineer | Voice AI Startup About the Company Our client is a fast-growing Y Combinator... ...at scale. The Role As a Founding Senior Backend Engineer, you'll build... ...and design teams to create intuitive APIs for rapid customer onboarding Support...Full timeH1bRemote workVisa sponsorshipFlexible hours- Founding Engineer, Backend & Infrastructure About Backbone Care should be paid for the moment it’s delivered. At Backbone, we’re making that possible for the first time by building the clinical AI layer for healthcare payments. Today, U.S. healthcare wastes more than...
$160k - $300k
...Hebbia The AI platform for investors... ...drives upside. Founded in 2020 by George Sivulka... ...use cases. The Agents team builds everything... ...LLM inference engine - a distributed, asynchronous... ...The Role A backend engineer at Hebbia... ...backend and API systems using technologies...Work experience placement$250k - $400k
...seeing a surge in market demand as agents become real first-class... ...chat. AgentMail is building an API designed to give inboxes to AI agents and be the sole identity... ...your AI. We’re looking for a founding engineer with strong backend and infra instincts to help build the...Full timeWork experience placement$200k - $325k
...Group in San Francisco seeks a founding team member to architect and ship production-grade AI systems directly with customers.... ...implementations and maintaining backend services and APIs. Candidates should have strong backend engineering skills, a relevant degree, and be...- ...re transforming how engineers create, access, and... ...’re looking for a Founding Backend Engineer to help us build an AI-powered knowledge platform... ...in terms of infra, deployment, and containerization... ...systems including API services, databases... ...built your own agents) You're familiar...Work experience placementWork at officeFlexible hours
- ...Guild.ai, Inc. is seeking a Founding Engineer to design and build the user-facing layer of AI control plane systems... .... This role combines frontend and backend responsibilities, as you'll develop... .... Ideal candidates will have strong API design instincts, experience with SaaS...
- The Electric Plant is looking for a Founding Software Engineer in San Francisco to build the software... ...integrating IoT hardware and AI. You'll influence architectural decisions... ...systems. This role requires strong backend systems and API development skills, alongside experience...
$175k - $300k
...About Trove Trove is developing an AI associate for financial firms - think enterprise search & agents for private equity, hedge funds,... ...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...- An innovative tech company in San Francisco is seeking a Founding Backend Engineer to build an AI-powered knowledge platform. This role involves shaping... ...defining technical direction, and working on backend systems, APIs, and databases. Candidates should have over 5 years'...Flexible hours
$200k - $300k
...the company | Founding Full‑Stack Engineer | San Francisco | Full‑... ...equity | the company.ai the company is the AI agent platform that runs... ...agent runtime, the backend, and the integrations... ..., Postgres, real infra) use the latest AI... ...Postgres, the Anthropic API, integrations...Full timeImmediate start$130k - $200k
...Software Engineer, Agent Delivery (Founding Team) Title of Role: Software Engineer... ...Funding: Series B - Logistics, AI, Enterprise, B2B Office... ...experience with a focus on backend development. ~ Proven... ...with distributed systems, APIs, or real-time delivery infrastructure...Work at office- ...Soulside AI in San Francisco is searching for a Backend Engineer to join their founding team. This role offers the unique chance to shape the technical foundation of a revolutionary mental health care platform. The ideal candidate will have expertise in Spring Boot, AWS...Remote work
- ...Berkley Hunt is partnering with an early-stage AI startup seeking a Founding Full-Stack Engineer to shape the product and technical direction. This 0-1 role offers high ownership and fast iteration, directly impacting the company trajectory. The ideal candidate has 5+...
- ...Kastle in San Francisco is looking for a talented engineer to architect and own systems that power real-time AI voice and compliance workflows. You will play a... ...salary and meaningful equity at an early-stage company with a world-class founding team. #J-18808-Ljbffr...
- ...Maxana is looking for an experienced Backend Engineer to join their team for a confidential AI platform client. This role involves ownership of features across APIs, CLI tooling, and billing systems, working directly with senior engineering and product leaders. The ideal...
- ...alignment infrastructure for AI systems: defending against... ...About the Role We're hiring a Founding Engineer (Backend) to own the systems that... ...for every model call their agents make. What you'll do Own the... .... Inference infrastructure, API gateways, proxy systems, CDN...
- ...Conversion is the AI-native marketing automation... ...through retention, with AI agents doing the work that... ...Francisco and includes engineers, designers, and operators... ...customers. The best infra work here is measured in... ...tech stack: Go for backend services Kafka for large...
$160k - $225k
...The Role As a Founding Engineer at Straia, you’ll work directly... ...and help define how AI can power the next... ...a strong emphasis on backend systems (Node.js, TypeScript... ...data and AI agent workflows Data Layer:... ..., Gemini, Claude via API Cloud & Infra: Hosted on GCP What We...Work at office- Nerdleveltech is seeking a Software Engineer to design and build robust backend systems and APIs. This role requires 2+ years of experience in production-grade coding, with knowledge in Go, Java, or Python, and familiarity with cloud infrastructure like AWS. The position...Remote job
- ...thinking tech startup based in San Francisco is seeking a backend developer to design and implement private APIs for their web and mobile applications. The ideal... ...manage infrastructure while contributing to innovative, AI-driven creative tools. Strong experience in backend...
- ...Description Job Description We are hiring a Founding Software Engineer in San Francisco. We are building a... ...engineering archetype at Unsiloed AI and set the ceiling for the team.... .... Architect, build, and scale core backend systems powering document intelligence...
- ...Senior Backend Engineer San Francisco About Us... ...entertainment company founded by Jimmy Donaldson... ...We're doing an AI-first engineering... ...membership ecosystem: APIs, data models, and... ...Use AI coding agents and modern development... ..., service, and infra performance....Temporary workWork at officeRelocation packageFlexible hours2 days per week
- Hypercubic is looking for a founding backend engineer based in San Francisco, California. In this role, you'll prototype and productionize AI-powered systems, directly working with the CTO. This position offers meaningful ownership over product direction and engineering...
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