2,918 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Staff Software Engineer (Remote)
Staff Software Engineer at Slate, a startup building affordable, customizable EV trucks in the US. You lead architecture, coding, and delivery of major systems on the customer-facing digital platform (vehicle discovery, customization, ownership), working with distributed systems, web services/APIs, and cloud infrastructure.
Senior Java Developer
Senior Software Engineer (Java/Python) who leads and mentors an engineering team while hands-on building scalable applications, driving architecture decisions, CI/CD pipelines, and cloud-native infrastructure on AWS, Azure, or GCP. Full-time in Bahrain, minimum 5 years' experience.
Chief Technology Officer (CTO)
Hands-on CTO for an early-stage tech company in Kuala Lumpur: owns the technical vision and architecture, builds the engineering team from scratch, and deploys AI as a core enabler of automation and efficiency. Requires deep backend, distributed systems, and cloud (AWS/GCP/Azure) expertise with a builder mindset.
Founding Engineer – EdTech
First full-time engineer at a fast-growing New York startup building software for K-12 schools. Owns backend architecture and complete end-to-end systems, integrating messy legacy school data via scraping, browser automation, queues and retry logic. On-site daily in NYC; $140k–$220k base plus 0.5–1.5% equity.
Member of Technical Staff, Agentic AI - FWA
Architect and deploy production agentic AI systems (RAG pipelines, tool-calling, multi-agent workflows) in Python for high-impact U.S. government applications at an early-stage AI company, owning projects end-to-end from data exploration through deployment. Hybrid in McLean/Tysons Corner, VA; requires U.S. citizenship and DC-area presence.
Software Engineer
Mid-senior full-stack software engineer at a growing UK tech scale-up: design and build scalable features across frontend and backend, contribute to DevOps practices like CI/CD and infrastructure automation, and collaborate with product and design. Core stack includes Go, AWS, Kubernetes, GraphQL/gRPC/REST, and MySQL/PostgreSQL.
Software Engineer
Mid-senior C# software engineer (roughly 70% backend with Azure, 30% frontend) at a London-based scale-up building a greenfield Tech4Good product for the energy transition toward Net Zero. Day-to-day work spans C#, SQL Server and Web APIs plus Vue.js/TypeScript, using agile TDD practices, in a hybrid model with 1-2 days per week in the Central London hub.
Java/Golang Developer
Backend engineer (Golang/Java) at a cloud security startup's Northern Ireland hub, owning services end-to-end — design, build, deploy, monitor — on a cloud-native runtime-security platform spanning AWS, GCP, and Azure, using Docker, eBPF, and distributed systems. Hybrid working; salary plus equity and private healthcare.
Software Engineer
Generalist software engineer at Axle Energy building core infrastructure to connect, orchestrate, and trade distributed energy devices (EV chargers, heating, home batteries) in electricity markets. Stack is Python, React, Docker, and GCP; hybrid role in London with 2-3 office days per week.
Member of Technical Staff, GPU & Distributed Systems
Builds the distributed cloud systems behind Reactor's real-time world-model inference platform: multi-node GPU inference, fast model loading and weight distribution, Kubernetes scheduling across clouds, and GPU communication tuning to cut cold starts and tail latency. Stack: Go/Rust/C++/Python, Kubernetes, NCCL/RDMA, NVIDIA GPUs and AWS Trainium.
Software Engineer
Software engineer (recruited by Raydar on behalf of a fast-growing AI software company) in San Jose: design and run evaluations of automated LLM-driven systems, build capabilities like tool integrations, memory and multi-step workflows, and turn experiments into maintainable production code. Built on Python and typed JavaScript, on-site 5 days/week.
Founding Engineer - Generalist
First Founding Engineer at a seed-stage AI startup building an agentic geospatial intelligence engine — a natural-language interface that orchestrates specialist agents over geospatial datasets to answer questions about the physical world. You'll own full-stack modules end-to-end (data ingestion, spatial computation, agent orchestration, product surfaces), in-person in San Francisco alongside the
Member of Technical Staff, (Software Engineer, Experience)
Frontend software engineer on Perplexity's Core Experience team in San Francisco, building polished web interfaces for interacting with AI agents (chat threads, artifact editing, message composition) using React, TypeScript, and CSS, working closely with design and research teams.
Sr. Ground Software Engineer
Senior Ground Software Engineer at Fortastra (Torrance, CA, on-site) owns ground control software that commands and monitors spacecraft, plus the telemetry data infrastructure and visualization/analysis tools supporting flight ops and ground tests. Works across the full ground stack using languages like Python, C++, Go, or Rust with databases, time-series stores, and streaming pipelines.
Member of Technical Staff — Agent Post-Training
Moonlake (via Creatify's job board) is hiring a Member of Technical Staff to lead RL infrastructure and post-training for vision-language and code-generating agents that build and simulate 3D worlds. Day-to-day: fine-tuning, reward design, agent-trajectory data systems, and scaling multi-GPU training. On-site in San Francisco.
Member of Technical Staff — RL & Agentic Model Training
Builds and leads reinforcement-learning and post-training infrastructure for Moonlake's vision-language and code-generating agents that create interactive 3D world simulations. Day to day: SFT, reward modeling, agentic RL pipelines, trajectory data systems, and distributed multi-GPU training, primarily in Python with PyTorch or JAX, on-site in San Francisco.
Member of Technical Staff — Post-Training Infrastructure
Engineer on Moonlake's team building RL and post-training infrastructure for multimodal agents (vision-language and code-generating) that create and simulate interactive 3D worlds for robotics and embodied AI. Day to day: building SFT/preference-optimization/reward-modeling/RL pipelines, trajectory data systems, evaluations, and scaling distributed multi-GPU training. On-site in San Francisco.