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19,422 Y Combinator jobs

Open roles at Y Combinator–backed companies, from current batches to graduated unicorns.

19.4K jobs
EffiGov Backed by Y Combinator
3 views last month

Software Engineer Intern (Fall 2026)

Open 33d On-siteNorth AmericaInternshipIntern
United States

An internship building production software for local governments, working full-stack with Python/FastAPI or TypeScript/Next.js to solve real-world problems, debug AI systems, and improve infrastructure—with high ownership from day one.

AI API AWS Cloud Docker +9 skills
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Short-Story Backed by Y Combinator
3 views last month

Senior Backend Engineer – Scalable E-commerce Systems (Remote)

Open 33d North AmericaSenior
United States

Senior Backend Engineer at a fast-growing retailer building scalable services for order processing, logistics, and internal operations using data models and APIs.
Permitflow Backed by Y Combinator
4 views last month

Product Manager, Applied AI (Staff / Senior Staff)

Open 33d RemoteNorth AmericaStaff
United States

Owns AI-powered workflow agents for permitting and inspections, building evaluation systems, feedback loops, and tools to drive automation and reliability.
permitflow Backed by Y Combinator
2 views last month

Product Manager, AI (Staff/Principal)

Open 33d HybridNorth AmericaPrincipal
United States

Own PermitFlow’s core AI agents that automate permitting workflows for construction projects, balancing full automation with human-in-the-loop quality gates while building evaluation systems and internal tooling for agent reliability.

Agentic AI AI Automation LLM OpenAI +1 skills
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LineLeap Backed by Y Combinator
5 views last month

Staff Software Engineer, Product Innovation

Open 33d On-siteNorth AmericaStaff
United States

Build and ship high-impact consumer features for a platform that lets users skip lines and pay at bars, clubs, and venues, using AI agents to accelerate development.

Agentic AI AI Automation Cloud Design Patterns +7 skills
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Infinity Backed by Y Combinator
3 views last month

Inbound Customer Service & Dispatch Specialist

Open 45d North AmericaFull-time
United States

At Infinity we live by three powerful principles: Energy, Excellence, and Execution. Our mission is simple yet bold—we create Life-Changing Experiences for both our employees and our customers. Recognized as a Top…

Account Executive
Infinity Backed by Y Combinator
3 views last month

Dispatch Operations & Customer Service Manager

Open 45d North AmericaFull-time
United States

At Infinity, we live by three powerful principles: Energy, Excellence, and Execution. Our mission is simple yet bold—we create Life-Changing Experiences for both our employees and our customers. Recognized as a Top…

Performance Management
Checkr, Inc. Backed by Y Combinator
2 views last month

Senior Python Engineer — Data Platform for Verified Decisions

Open 33d North AmericaSenior 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

Senior Python engineer building a data platform that powers mortgage-verification services for top US lenders, focusing on scalable backend services and customer-driven features.
Encord Backed by Y Combinator
3 views last month

Software Engineer, Full-Stack

Open 33d UK
United Kingdom

Builds and maintains Encord’s full-stack platform for AI data curation, annotation, and model evaluation across the AI lifecycle.

AI UiPath
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Encord Backed by Y Combinator
2 views last month

Software Engineer, Backend

Open 33d UK
United Kingdom

Builds and maintains backend services powering Encord’s AI data platform, handling data indexing, curation, and model evaluation for AI teams.

AI UiPath
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Agave Backed by Y Combinator
6 views last month

Product Manager

Open 87d On-siteNorth AmericaFull-time 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

Build and launch new products on top of Agave’s proprietary construction-platform integrations, owning the full lifecycle from idea to revenue while collaborating with engineers and go-to-market teams.

AI API ERP Go-to-Market Postman +6 skills
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langdock Backed by Y Combinator
6 views last month

(Senior) Platform Engineer - m/f/d

Open 33d On-siteEuropeContractSenior
Germany

Build and operate the shared infrastructure that powers Langdock’s AI platform, turning complex capabilities like agent runtimes and model gateways into stable, reusable services for European enterprises.

AI API Authentication AWS Azure +21 skills
90K – 140K €
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langdock Backed by Y Combinator
4 views last month

(Senior) Distributed Systems Engineer - m/f/d

Open 33d HybridEuropeContractSenior
Germany

Where Europe's enterprises adopt AI Langdock is the AI platform used by more than 10,000 companies to give employees secure access to the leading AI models, to build and share agents and to automate repetitive…

AI AWS Azure Distributed Systems GCP +10 skills
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Revnu Backed by Y Combinator
2 views last month

Founding Engineer

Open 26d On-siteUK
United Kingdom

Build and shape an AI agent platform from scratch, integrating LLMs, multi-channel experiments, and production-grade infrastructure to automate growth tasks for customers.

AI LLM Machine Learning Observability SEO +1 skills
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permutive Backed by Y Combinator
1 views last month

Senior Product Marketing Manager

Open 87d HybridNorth AmericaFull-timeSenior 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 States

About Us Permutive is the data collaboration platform that powers the advertising ecosystem. We exist to build an advertising ecosystem that respects and adapts to consumers’ choices around their privacy, and in doing…

AI Analytics Cloud Go-to-Market Sales Enablement +1 skills
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Meta Backed by Y Combinator
3 views last month

Senior Android Engineer: Scalable AI-Driven Mobile Apps

Open 34d North AmericaSenior
United States

Build and optimize Android apps for billions of users, using modern UI techniques and scalable architecture while leading engineering initiatives.

Android
Meta Backed by Y Combinator
3 views last month

Senior Android Engineer — Scalable Apps & AI Impact

Open 34d North AmericaSenior
United States

Build and optimize Android apps that connect billions of users, focusing on scalable UI and high-performance systems with Java.

Android Java
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Mattermost Backed by Y Combinator
2 views last month

Senior Security Engineer

Open 34d RemoteWorldwideSenior
United Kingdom

Senior Security Engineer designs and implements security tooling, hardens cloud/IT infrastructure, and leads incident response for a secure collaboration platform used by defense and Fortune 500s.

AI Automation AWS Azure Cloud +18 skills
76K – 101K £
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Model ML Backed by Y Combinator
3 views last month

Engagement Manager

Open 32d

The Engagement Manager (EM) owns the end-to-end customer outcome: translating client problems into scalable Model ML workflows, running clean operating cadence, and driving adoption through clear governance and…

Machine Learning
Meta Backed by Y Combinator
2 views last month

Software Engineer, iOS

Open 32d UK
United Kingdom

Meta is hiring iOS engineers to build and improve mobile apps that connect billions of users globally, focusing on cutting-edge features and user experience.

90K – 120K £

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