2,916 Founding Engineer jobs
Founding engineer roles building the first product at early-stage startups.
Senior Systems Engineer - Electric Propulsion (all genders)
Senior systems engineer who owns the requirements baseline, architecture, interfaces, and verification evidence for an electric aircraft propulsion system, coordinating suppliers and certification teams through integration, testing, and entry into service. Core focus: electric motors, inverters, propulsion controls, and requirements/traceability management in a regulated aerospace environment.
Python Engineer
First software engineer (after the CTO) on a lean early-stage team, helping shape the platform's technical direction. Day-to-day is backend development in Python with Django or Flask, working with SQL and NoSQL databases on Linux and AWS.
AI Founding Engineer
Founding engineer building production LLM and voice AI systems that serve real users: designing evaluation harnesses, optimizing the generation stack (retrieval, prompts, routing, safety), improving streaming ASR/TTS for Indian languages, and owning safe, observable deployment in high-trust, regulated environments.
Trading Systems Engineer - Options Market Making
Maintains and optimizes Maven’s trading systems to ensure high performance and availability for options market-making operations using Python and Linux.
Software Engineer till Råsta Lake Systems
Software Engineer at Råsta Lake Systems, a Stockholm startup (part-owned by a major Swedish bank) building an AI-driven SaaS data-analytics platform. Day to day: backend-heavy development in C#/.NET with PostgreSQL and Azure, building AI features and client-facing prototypes, with React on the frontend and agentic coding tools like Claude Code.
Founding Engineer
Senior hands-on founding engineer owning architecture, infrastructure, and engineering execution for Inframodel, an enterprise financial-modeling SaaS for infrastructure/project finance. Day to day: build end to end on Next.js/React/TypeScript with a .NET C# Excel layer, own data modeling, security, CI/CD and production reliability, and lead the existing engineering team.
Member of Technical Staff, Data Flywheel
Hands-on research-engineering role on Reflection's Data Flywheel team in London: turning real-world model usage into evaluations, curated human/synthetic training data, and feedback loops that measurably improve LLMs. Day-to-day spans evaluation design, data pipelines and infrastructure, partner/data-source integration, and post-training reward signals.
Member of Technical Staff, Platform
Full-stack product engineer at Abaka AI building features for its Expert Talent platform end-to-end (UI, API, data layer), including LLM-powered and AI-assisted product workflows. Stack emphasizes React/TypeScript on the frontend, strong backend fundamentals (API design, data modeling, relational databases), and daily use of AI coding tools.
Member of Technical Staff, Infra
Backend/infrastructure engineer owning the scalability and reliability of Abaka AI's Expert Platform — designing core services, APIs, and data models that power AI-native product features. Focus is cloud infra, backend architecture, and production reliability, with occasional full-stack work (React/TypeScript) and daily use of AI dev tools.
Software Engineer
First Growth Engineer at Eon (US, remote) building the company's growth engine: AI agents and automation (Claude, LLM APIs, Clay), data pipelines across Salesforce/HubSpot/Gong, web experimentation on eon.io, and new technical distribution channels. Requires 3+ years shipping production software with Python/TypeScript, SQL, and hands-on AI tooling.
ソフトウェアエンジニア｜規制対応オンチェーン金融基盤
Software engineer in Startale Group's newly created regulated-finance unit, translating Japanese financial laws into system requirements, data models, and smart contracts for on-chain financial infrastructure (security tokens, stablecoins), while building mission-critical AWS foundations that can withstand audits. Core stack: Rust, TypeScript, Solidity, AWS, Aurora/PostgreSQL.
Software Engineer
Software Engineer at Dialogue AI, building an AI-powered customer research platform where AI agents create studies, conduct interviews, and extract insights. Full-stack work spanning frontend, backend, and AI infrastructure, with heavy product ownership alongside the founding team in Los Angeles.
Staff Systems Engineer
Inscribe, which builds document fraud detection for banks and fintechs, is hiring a Staff Systems Engineer in Dublin to own the infrastructure behind its real-time API product. Day to day: AWS/ECS and cloud architecture, Terraform/Docker, Postgres/Redis, Datadog/Grafana observability, plus hands-on Python/Django backend tuning.
Member of Technical Staff - Pre-Training Evals Infra
Builds evaluation infrastructure for an open-foundational-model AI research lab: designing eval APIs and data models, running distributed evaluation workloads across pre-training checkpoints on GPUs, profiling inference performance, and creating researcher-facing dashboards. Core stack: Python, C++, or Rust plus distributed systems.
Robot System Engineer
Designs the overall system architecture for robots and leads hardware-software integration — wiring motors, drivers, sensors, and CAN/EtherCAT buses, debugging cross-subsystem issues, and deploying at customer sites. Requires 3-7 years in robotics/mechatronics with Python or C/C++ skills.
Software Engineer
Full-stack generalist engineer building AI-driven facilities management software — shipping APIs, data pipelines, cloud infrastructure, and dashboards end-to-end at a funded early-stage startup. Core stack is Python (FastAPI/Django), SQL, AWS, CI/CD, and Docker, with TypeScript/React as a bonus.
Principal Software Engineer
As a Principal Software Engineer at Freeform, you act in technical leadership, driving development of AI-native manufacturing systems (edge computing, hardware control, automation, telemetry) using C/C++/Rust. You collaborate with engineering teams to architect complex software, solve hard problems, and deploy platforms processing petabytes of data on the edge.
Senior Software Engineer
Architect and build software for autonomous 3D printing factories—spanning hardware control, petabyte-scale telemetry/storage, GPU-accelerated compute, and ML pipelines—using C/C++ or Rust in a full-time on-site role.