2,917 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Founding Software Engineer - Python / Real-Time Systems
First engineering hire at a profitable, self-funded company building real-time pricing and trading systems. Day to day: Python pricing/bidding engines, data pipelines, A/B testing frameworks and model monitoring in the New York office, using agentic AI workflows. $200k-$400k base plus up to 2% equity.
Software Developer
Remote software developer (5+ years of experience) building a digital property-administration platform for a growing Spanish startup, expected to scale to thousands of users. Stack centers on TypeScript, Node.js, React, Next.js, GraphQL, Docker, and Google Cloud.
Software Engineer, Internal Tools & Data Pipelines
Owns internal applications and data pipelines that move data from capture through review to delivery, and builds ML services that assist labeling and automated checks. Work spans full-stack apps, backend services, cloud infrastructure, and automation.
Software Engineer, AI Systems & Performance
Builds and owns Cotidal's workload software stack for AI training, reinforcement learning, and inference on its accelerator fleets: framework integrations (PyTorch/JAX/XLA), performance engineering across compilers, runtimes, and kernels (CUDA/Triton/Pallas), and production reliability at scale. On-site in Palo Alto at a well-funded early-stage AI infrastructure company.
【正社員】プロダクトエンジニア
Product engineer at Initial Engine building AI-native new businesses from 0→1 alongside the CEO and CTO in a small, fully remote (Japan-wide) team. Covers hypothesis validation through architecture and implementation using AI-driven development (Claude Code, Codex) with TypeScript, Next.js, and AWS.
Engineering Manager
Engineering Manager (Technical Lead Manager) at fintech Point, leading a small senior team building AI customer-experience agents (voice, email, chat, SMS). Hands-on role: setting AI technical strategy, writing/reviewing code (LLM, RAG, orchestration, Langfuse observability), and partnering with Product, Ops, and CX. Hybrid — onsite in Palo Alto one day per week.
Engineering Manager - (Data-Powered Road Freight Plataform)
Engineering Manager to lead and scale the engineering team at Meight, a seed-stage Portuguese startup building a data-powered SaaS platform for small road freight carriers. Blends hands-on technical leadership (architecture, delivery, cloud/data stack) with people management, hiring, and engineering culture.
Staff Software Engineer: Growth Engineering
Builds and maintains scalable backend and frontend systems for client onboarding, eligibility processing, and member access in a mental health benefits platform. Owns GraphQL APIs, React/React Native apps, and cross-functional tech strategy with high ownership and rapid impact.
Founding Engineer (DreamLever) - NY
DreamLever's first in-house engineer owns technical execution on a live AI product that learns a business from meeting conversations: shipping full-stack features daily, improving the AI Chief of Staff agent, and coordinating work delegated to an external dev partner alongside the founder. Stack: TypeScript (Next.js/React), Postgres/Supabase.
Member of Technical Staff, Model Training (applied research)
Train, fine-tune, and deploy specialized AI models (language, vision-language, robotics, autonomous agents) at micro1, owning the full lifecycle from dataset design through SFT/RL/distillation to optimized production inference. Core stack is Python and PyTorch, aiming to match frontier-model quality with better latency and cost.
Member of Technical Staff, Model Training (post-training research)
Research engineer role at micro1 training the company's own large language and multimodal models: you design and scale post-training methods (SFT, reinforcement learning, on-policy distillation), optimize data mixtures and reward signals, and run large-scale experiments. Core stack is Python and PyTorch; full-time and remote.
Intermediate / senior software developer
Intermediate/senior full-stack engineer at Evnex, a Christchurch startup building smart EV chargers and the software behind a 25,000+ charger fleet across NZ and Australia. Day-to-day: designing features across cloud backend, APIs, web and mobile (TypeScript, Node.js, React/React Native, AWS/GCP/Azure) and building agentic AI workflows into engineering practice.
Senior IT Engineer
First dedicated IT engineer at Nara, an AI-native healthcare benefits administrator (TPA). Owns identity (Google Workspace, JumpCloud), the macOS/Windows device fleet, SaaS administration, day-to-day security operations, SOC 2/HIPAA compliance evidence, and end-user support for a rapidly scaling, Chicago-based hybrid team.
Senior Python Developer
Senior full-stack Python developer at a growing Series A SaaS company building its UK team in Teesside (hybrid). You'll build features across a Python/Django platform, shape engineering practices, and mentor the team, using AWS, CI/CD, and PostgreSQL.
Software Engineer (Web Platform)
Frontend-focused engineer who owns the web platform end-to-end at Hinoki, an AI-native cybersecurity platform: building analyst verification flows, AI-agent-driven investigation features, and reporting surfaces. The work is deep React/TypeScript with heavy emphasis on performance.
Software Engineer (Agent Infra)
Builds core platform infrastructure for Hinoki's AI-native security platform in San Francisco — owning systems like agent orchestration, real-time environment data modeling, work verification, or CISO-facing reporting. Works primarily in TypeScript and C++, with production AI agents, distributed systems, and cloud depth expected.
Desarrollador/a .NET
.NET backend developer at an Itnig-backed startup building centralized employee-benefits/wellbeing infrastructure for SMEs, expanding from Italy across Europe. Day to day: implement backend features in C#/.NET Core Web APIs with Entity Framework Core and PostgreSQL, with testing, clean code and third-party API integrations. Hybrid from Barakaldo (Bilbao area).
Software Engineer
Founding software engineer at a seed-stage startup in Seattle building a procurement/supply-chain platform: ship a 0-1 product with strong UI/UX, build API integrations, and help set the architectural roadmap. Stack includes TypeScript, React, Next.js, GraphQL, and Trigger.dev. Base salary $150k-$225k plus equity.
Senior Software Engineer
Senior product engineer at an AI-native platform company in New York, owning AI-agent-powered products end to end: backend services, React frontends, enterprise integrations, and agent workflows. Core stack is Python, JavaScript/TypeScript, React, Go, and AWS, with heavy use of frontier models and AI coding tools in an autonomous 0-to-1 environment.
Staff Software Engineer
Hands-on technical lead at a venture-backed AI startup in NYC that builds AI systems for data-intensive investigations. Owns LLM fine-tuning (LoRA/QLoRA/SFT), production AI agent architecture, evaluation frameworks, and inference/serving optimization, working in Python and PyTorch.