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2,914 Founding Engineer jobs

Founding engineer roles building the first product at early-stage startups.

2.9K jobs
May Mobility Backed by Y Combinator
13 views last month

Systems Engineer II

Open 141d HybridNorth AmericaMiddle 4 questions H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
United States
Ann Arbor, MI

Systems Engineer II defines and maintains technical requirements for autonomous vehicle systems, collaborates on design reviews, and works with test teams to verify safety and performance in a fast-paced startup environment.

ADAS Agile Ethernet FMEA IoT +3 skills
95K – 120K $
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Pacific Fusion Backed by Lightspeed
19 views last month

Summer 2027 Internship- Software Engineering

Open 56d North AmericaInternshipIntern 6 questions
United States
San Leandro, CA/Fremont, CA or Los Lunas, NM

Software Engineering Intern (Summer 2027) at Pacific Fusion, a fusion energy startup, building web-based UIs and backend services that let engineers and operators run the fusion demonstration facility — real-time monitoring, configuration/data management, and integration with controls systems. Stack involves TypeScript/JavaScript, Go or Python, and SQL/NoSQL databases.

API Automation CAD Data Pipelines Data Visualization +11 skills
30 – 48 $ / hr
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Onos Health
23 views last month

Staff Software Engineer (AI)

Open 141d HybridNorth AmericaStaff Salary + equity 3 questions
United States
San Francisco

Staff AI engineer at Onos Health building LLM/NLU systems that process clinical notes and classify patients' level of care, plus the data pipelines and backend integration behind them. Hybrid role in San Francisco (2-3 days/week in office) using Python/Django, AWS, Docker, and PostgreSQL.

AI AWS Data Engineering Data Pipelines Data Science +14 skills
200K – 275K $
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LA-Tech
33 views last month

Hyey - Software Engineer Intern (Los Angeles, CA)

Open 34d North AmericaInternshipIntern
United States

Part-time remote software engineering internship (15-20 hrs/week, 8-10 weeks) at Hyey, a Los Angeles startup building a caregiver coordination app. The intern fixes bugs, ships small features, and improves UX/frontend flows using JavaScript, React, Next.js, Node.js, and Firebase.

AI API Authentication Cloud Firebase +14 skills
18 – 18 $ / hr
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Scrabble & Jigsaw
7 views last month

SAP ABAP Developer

Open 34d APAC
India
Mumbai

Designs, develops, and maintains ABAP-based integrations (RFCs, BAPIs, IDocs, PI/PO, OData, BTP) between SAP ECC/S4HANA systems and CashFlo's AI-powered finance automation platform, covering payments, GST/compliance, and vendor financing workflows. Collaborates with client IT and internal product teams on end-to-end integration delivery.

ABAP Accounts Payable Accounts Receivable Agile AI +11 skills
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HearstLab
120 views last month

Software Engineer II

Open 34d RemoteWorldwideMiddle

Remote Software Engineer II at Tilt (hiring via HearstLab) to own well-scoped full-stack features from design through production, reduce bugs and tech debt, keep CI pipelines green, and join an on-call rotation. Core stack is Python/Django on the backend and React on the frontend; B2B SaaS, startup environment.

CI/CD Django Python React SaaS
125K – 135K $
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Maven AGI
9 views last month

Senior Software Engineer – Platform Team

Open 34d HybridNorth AmericaSenior 3 questions
United States
Boston

Senior Software Engineer on Maven AGI's Platform team, defining architecture and building scalable backend services that power autonomous AI customer-support agents. Day-to-day spans TypeScript/Node and Java (Spring Boot) services, telephony integrations (SIP/Twilio), and mentoring engineers in a hybrid Boston/SF startup.

Agentic AI AI Clio Conversational AI Distributed Systems +9 skills
150K – 185K $
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Maven AGI
15 views last month

Staff Software Engineer – Platform Team

Open 127d HybridNorth AmericaStaff 3 questions
United States
Boston

Staff Software Engineer on Maven AGI's Platform team: a senior hands-on role architecting, building, and scaling the backend services that power Maven's agentic AI customer-support platform, while setting technical direction and mentoring engineers. Core stack is TypeScript/Node and Java (Spring Boot), with telephony (SIP/Twilio) integration work.

Agentic AI AI Clio Conversational AI Distributed Systems +9 skills
180K – 215K $
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Hedge (YC)
23 views last month

Founding Engineer

Open 34d North AmericaFull-time
United States
San Francisco

Founding engineer at Hedge, an AI-native specialty commercial insurance brokerage (YC-backed), owning the platform end to end — AI agents, evals, data pipelines, integrations, and reliability — onsite in San Francisco. Core stack is Python/FastAPI, TypeScript/React, and Postgres.

Agentic AI AI Data Pipelines FastAPI PostgreSQL +3 skills
150K – 250K $
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Omnea Backed by Accel
27 views last month

Software Engineer, Engineering Acceleration

Open 34d HybridUK 8 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.
United Kingdom
London

Software engineer on Omnea's Engineering Acceleration team, building the internal tooling and infrastructure for AI-assisted development — agent tooling, context management, dev environments, and automated validation — so engineers and AI agents can build, test, and ship software reliably. Stack: TypeScript, React, Postgres, AWS serverless, SST, Pulumi, GitHub Actions, Datadog.

Agentic AI AI AWS Datadog GitHub +7 skills
110K – 145K £
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CONROO GmbH
37 views last month

Web Developer | Full Time (m/w/d)

Open 34d EuropeFull-time
Germany
Berlin

Own and drive CONROO's central web app — used daily by terminal operators, truckers, and internal ops teams — end-to-end from scoping to production within a cross-functional team. Core stack is Vue.js 3, Vuetify, and TypeScript, with REST API integrations and Git/CI/CD/Docker tooling.

API CI/CD Developer Experience Docker Git +4 skills
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Clarium
47 views last month

Data Integration Engineer

Open 34d RemoteNorth America 5 questions
United States
Remote/US

Clarium is hiring a Data Integration Engineer to own customer data integrations end to end: running technical discovery with hospital IT teams, building and operating production Python/SQL data pipelines that pull data from hospital ERP, supply chain, and EHR systems into its Astra OS platform, and troubleshooting live integration issues.

AI Airflow API Authentication AWS +16 skills
130K – 150K $
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Cartesian
13 views last month

Software Engineer (Product)

Open 61d North America 4 questions H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
United States
Cambridge, MA

Engineer at Cartesian builds end-to-end features for an indoor positioning/inventory-visibility platform used by retail stores — spanning mobile (Android/Kotlin), a Python/FastAPI backend, Next.js frontend, and Azure/Kubernetes infrastructure, with close in-person collaboration with customers and research teams.

AI Android API Azure CI/CD +15 skills
100K – 180K $
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Cartesian
18 views last month

Software Engineer (Mobile & Sensing)

Open 61d North AmericaJunior 4 questions H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
United States
Cambridge, MA

Mobile engineer at an MIT-spun-out startup building indoor positioning and inventory-visibility software for retail. Day to day you build Android (Kotlin) SDKs and end-user apps that stream high-rate sensor data from RFID scanners, barcode readers and other hardware to help store staff locate items. In-person in Cambridge, MA.

Android Azure FastAPI Helm Kotlin +10 skills
120K – 180K $
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Cartesian
14 views last month

Software Engineer (Security)

Open 61d North AmericaJunior 4 questions H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
United States
Cambridge, MA

Cartesian, an MIT-spun-out startup building indoor positioning and inventory visibility for retail, is hiring a security-minded software engineer to build Python web services, harden access control, guide SOC 2 certification, and manage Azure/Kubernetes infra via Terraform. On-site 5 days/week in Kendall Square, Cambridge, MA.

Android API Azure CI/CD Cloud +17 skills
120K – 180K $
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Reflection AI Backed by Sequoia
19 views last month

Member of Technical Staff - Shared Services

Open 146d On-siteNorth AmericaFull-time Salary + equity 8 questions
United States
New York, NY

Builds and operates Reflection AI's core shared-services platform — developer infrastructure, SRE, and data/compute workflow tooling — that research and production teams rely on. Day-to-day involves designing distributed APIs and services with Go, Rust, C++, gRPC, and Kubernetes, with heavy focus on reliability (SLI/SLOs), scalability, and on-call readiness.

AI API Backbone.js C++ Data Ingestion +6 skills
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Younity
14 views last month

Senior Software Development Engineer

Open 35d HybridAPACFull-timeSenior
New Zealand
Christchurch Central, Canterbury

Senior full-stack engineer (backend-focused) as the first hire in a new Christchurch office for an AI-powered professional-services platform start-up. Day to day: build backend features, services and third-party integrations (Outlook, Xero, practice systems), owning work from design through production, using Node.js, PostgreSQL, AWS and React.

AI API AWS Claude Code Cloud +11 skills
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Raydar
17 views last month

Software Engineer, Data Infrastructure

Open 35d On-siteNorth AmericaFull-time 3 questions
United States
New York, New York

Raydar is recruiting a Software Engineer for a client's small New York engineering team to build backend data pipelines and cloud infrastructure from scratch, including per-customer cloud environments provisioned with tools like Terraform and AWS, using AI/LLM tooling heavily. On-site in New York 5 days a week; $165k–$290k plus equity.

AI AWS Cloud Data Modeling Infrastructure as Code +2 skills
165K – 290K $
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Meadow Backed by Y Combinator
38 views last month

Staff Software Engineer

Open 35d RemoteNorth AmericaFull-timeStaff 7 questions
United States

Staff/Senior Software Engineer building Meadow Pay, a payments platform for higher education. Day to day: end-to-end ownership of backend services and APIs in TypeScript/Node.js, React frontend work, and system reliability, with AI tooling as a core part of the workflow. Remote within the US.

AI API Fintech Node.js Observability +3 skills
185K – 276K $
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Helion Backed by LightspeedBacked by SoftBank Vision Fund
23 views last month

Senior Software Engineer, Plant Control

Open 35d On-siteNorth AmericaSenior 9 questions
United States
Everett, WA

Helion, a fusion power company, is hiring a Senior Software Engineer (onsite, Everett, WA) to design, build, and scale the plant-control software for its fusion generators — spanning real-time control, diagnostics, data acquisition, automation, and operator GUIs. Core stack is C++/Rust systems programming plus Python, on Linux, integrated with real hardware.

Automation CI/CD C++ Data Pipelines Docker +12 skills
240K – 255K $
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