2,916 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Member of Technical Staff
At Bluejay (voice AI agent platform), a Member of Technical Staff builds simulation, analysis and evaluation systems for conversational AI, plus resilient AWS infrastructure handling millions of real-time calls, with full-stack ownership and on-site customer work. Stack: Python, FastAPI, Supabase, AWS, LLM and voice tooling; 5 days/week in San Francisco.
Member of Technical Staff, Forward Deployed
Forward Deployed Engineer at Chakra Labs, an early-stage AI startup building RL environments and trajectory datasets for frontier AI lab customers. You'd shape training data, handcraft RL tasks, and spin up customer-facing dashboards on tight timelines using TypeScript, Python, Go, Vercel, Supabase, and AWS/EKS, on-site in Flatiron, NYC.
Member of Technical Staff, Head of Quality
Plato, an applied research lab building simulated environments and data infrastructure for training specialized AI agents, is hiring a hands-on Head of Quality in San Francisco. They review datasets and environment outputs, build automated QA/evaluation systems that catch reward hacking and broken verifiers, and hire and lead the QA team.
Member of Technical Staff, Inference Systems
Photon is hiring systems engineers to build a next-generation AI inference platform from scratch in Rust — owning batching, scheduling, KV cache management, request routing, and multi-GPU serving. It's an on-site role in Palo Alto for engineers with deep inference-internals knowledge.
Software Engineer, Product
Build and ship product features for Sixfold's AI underwriting platform, primarily in TypeScript/React with contributions to Ruby and Python services, while developing AI engineering skills (LLMs, prompt engineering, agentic coding) and sharing on-call duty. Based in the NYC office about 3-4 days a week.
Senior Robotics Software Engineer Perception and Localization
Senior robotics engineer develops perception and localization software for tractor-mounted camera systems: building computer vision algorithms, fusing stereo-depth and GNSS sensor data, and optimizing Python and C++ code for edge computing, while supporting the broader software and hardware stack.
Remote Java Developer - Gaming Startup
A Java developer builds game app code for a fast-growing iGaming startup, supporting localization and global game releases. Core tech is Java plus databases and common frameworks, with remote work and flexible arrangements offered.
Software Engineer
Senior/Staff Software Engineer on Coco's Delivery Platform team (in-office, Venice, CA) owning products end to end: consumer/merchant delivery apps, order integrations with DoorDash/UberEats/GrubHub, backend delivery and robot telemetry services, and internal fleet tools. Stack: Go, TypeScript, Postgres, Kafka, AWS, Kubernetes.
Senior Software Engineer, Corporate Security
Senior Software Engineer establishing corporate security foundations. The role involves managing identity and access via Okta/SSO, securing endpoints with MDM/EDR, and building software integrations to automate security policies across enterprise applications.
SOC Integration Engineer
A silicon SOC integration engineer who stitches subsystems into the full-chip top-level RTL for MatX's AI training chips, building automation for on-the-fly SOC RTL generation and aligning clock/reset, timing, and floorplan connectivity with physical design. Core tools: SystemVerilog, Python/Perl, and SOC integration/verification flows.
Rendering Systems Engineer - Simulation & Synthetic Data
A Senior/Staff rendering systems engineer who builds and scales Unreal Engine–based rendering for synthetic data generation, optimizing GPU throughput across cloud fleets. Core work is low-level C++/CUDA and Vulkan graphics performance engineering, profiling, and integrating the renderer into distributed simulation/data pipelines.
MTS IT Engineer
Provides Tier 1 and Tier 2 IT support for internal users, including white-glove executive support, employee onboarding, SaaS and identity administration (Okta, Rippling), and IT security initiatives like hardware security keys and device posture. Works across macOS/Windows, MDM tooling, and platforms like Google Workspace, Slack, Jira, and Linear.
Member of Technical Staff Research Software Engineer Safety Evaluations Infrastructure
Designs, builds, and owns secure sandboxed infrastructure for sensitive AI model evaluations at Reflection, including controlled data pipelines, access controls, audit logging, and evaluation orchestration tooling, with production-quality Python as the core technology.
Software Engineer Developer Productivity
Builds and operates developer-productivity foundations at Cursor (Anysphere): a multi-platform dev environment for macOS, Windows, and Linux, CI/CD systems (merge queues, build caching, flaky-test quarantine), machine provisioning automation, and local/CI parity, while setting technical direction and reviewing code across engineering.
Member of Technical Staff Engineering Lead Shared Services
Reflection AI is hiring an engineering lead to build and mentor a systems engineering team creating shared services that power its research and model-training work. The role blends people leadership, distributed-systems architecture, and hands-on coding to turn research and training needs into reliable platform primitives.
Member of Technical Staff Compute Platform
Builds and maintains the compute platform for large multi-GPU fleets at an AI company: tooling for automated remediation, topology-aware scheduling, capacity planning, and hardware debugging, plus cluster-wide monitoring, benchmarking, storage replication, and GPU networking. Core stack: Kubernetes, NCCL, GPU/cloud infrastructure.
System Engineer (Lab) — Generalist, Customer-Facing
A hands-on lab systems engineer at a biotech startup builds and validates low-cost diagnostic and forensic DNA assays, plus the robotics and automation around them — liquid handlers, sensor-driven rigs, data pipelines — using Python and lab automation tools, while working directly with customers from prototype through deployment.
Ground System Integration Engineer - Senior
Senior engineer who integrates customer satellites and flight software into Quindar's satellite command & control / mission management platform, decomposing mission requirements and debugging low-level hardware-software integration. Hybrid role (2-3 days in-office in Arvada, CO) using Python/C++/Java, CCSDS-family protocols, and AWS.
Senior Staff Software Engineer Network Infrastructure
fal is hiring a Senior Staff Software Engineer to design, build, and operate network infrastructure spanning data centers, cloud environments, and compute clusters — working on BGP routing, IPAM, peering, overlays, DNS, and Linux network tuning, with automation in Ansible, Python, and Go. Remote within the USA; visa sponsorship available.