Build product-facing tools for browsing environments, inspecting trajectories, and understanding model behavior.
Develop vendor-facing workflows to create, submit, test, and iterate on RL environments and training data.
Create dashboards and observability tools surfacing environment quality, eval results, and pipeline health.
This company builds a reinforcement learning data engine for frontier AI labs, creating and iterating on training data. They have offices in San Francisco and Singapore, offering a culture that values independence and high agency.
Own products and systems end to end, from ambiguous customer problems through architecture, implementation, and launch.
Build reliable backend systems for real-time bidding, payments, vault workflows, and partner integrations.
Use AI deeply to prototype, build, and iterate, and own the quality of what ships.
Alt unlocks the value of alternative assets, starting with the $5B trading-card market, letting collectors buy, sell, vault, and finance their cards in one place. Backed by leaders from Stripe, Coinbase, and pro athletes, it's a remote-first startup focused on real-time pricing and AI-native workflows.
Lead frontend architecture, including component design, state management, and performance for React and TypeScript interfaces.
Build and extend Python APIs and collaborate on data contracts, API design, and integration patterns.
Drive frontend standards, mentor engineers, and support internal tooling for operations and compliance.
Astra builds mission-critical infrastructure for moving money at scale, processing billions annually with 99.9%+ uptime. They are a remote-first, small, high-output team focused on collaboration and professional growth.
Collaborate cross-functionally with Integrations, Case Strategy, and other teams; contribute to front-end and admin workflows as needed.
Pivotal Health is a technology platform that helps healthcare providers get paid fairly by simplifying complex reimbursement workflows through an AI-driven platform. They are a collaborative, low-ego team, primarily hiring around Los Angeles and New York but open to exceptional talent elsewhere.
Set technical strategy for the team and drive large-scale, business-impacting projects.
Collaborate with product, design, and analytics to ensure technical sustainability and manage trade-offs.
Foster engineering quality and talent development through code review standards and mentorship.
Affirm is a financial technology company that provides transparent, flexible payment solutions, allowing consumers to pay over time without hidden fees. The company is remote-first and values inclusivity, offering competitive benefits and a collaborative culture.
Own big parts of the marketplace, including storefront, course platform, and recommendation systems.
Experiment with the latest agentic coding tools.
Work remotely in a close-knit team with a high degree of ownership.
Maven is a marketplace for practical courses taught by top experts, with a cohort-based model that achieves 80%+ engagement. They have 500+ live courses, $100M+ earned by experts, and a small, high-trust team of 20.
Architect, design, build, deploy, and maintain Model Serving infrastructure for a world-class Detection Engine.
Own projects that scale model serving and data processing to handle 10x traffic, including real-time streaming pipelines and online feature serving.
Collaborate with MLE and Data Science teams to build the ML Training platform, improving MLE velocity and model precision and recall.
Abnormal protects the humans behind the world's most critical organizations from AI-powered cybercrime. 4,500+ enterprises trust our behavioral AI platform, and we foster a culture of innovation and impact.
Design and develop large-scale platforms for LLM training and AI workloads.
Tackle distributed-systems challenges including intelligent job scheduling and resource optimization.
Collaborate with international teams to build production-ready AI infrastructure.
This role is with a partner company, an AI-focused R&D team building infrastructure for large language models. They are a fast-moving, highly technical team with a collaborative and innovative culture.
Build and ship end-to-end product capabilities across frontend and backend systems.
Develop user experiences using TypeScript and React, along with services and APIs using Go, Python, or comparable tools.
Collaborate with Product, Design, Data, and engineering partners to balance usability, performance, reliability, and time to value.
LaunchDarkly provides a feature management platform that helps engineering teams ship software and AI with speed, safety, and control. They are a growing company that values humble, open, collaborative, and kind teams.
Build core data platform capabilities, developing services and APIs for data access, query execution, ingestion, and synchronization.
Make integrations reusable by building connector frameworks that support different systems without bespoke implementations.
Own execution reliability by building orchestration, retries, checkpointing, and observability for predictable workload recovery.
Tessera Labs is redefining how enterprises adopt and operationalize AI by building multi-agent systems that automate complex business workflows across platforms like SAP and Salesforce. Backed by top venture capital firms and built by leaders from Meta AI and Google Research, they move fast and operate with extreme ownership.
Learn new concepts and technologies quickly and apply them to challenging problems
Design and build robust and extensible infrastructure to handle evolving and complex federal, state, and agency regulations
Dive deep to understand the inner workings of a highly complex industry
Valon is building the AI-native operating system for regulated finance, starting with mortgage servicing. It is a Series C company backed by a16z, managing $110+ billion in loans, with a culture of autonomy and high business impact.
Own features on Techstars OS end to end, from data ingestion to UI, including AI-native features like semantic search and assistive workflows.
Lead the migration and shutdown of legacy founder tools, consolidating functionality into the OS or retiring cleanly.
Act as a technical resource for the team, unblocking others and maintaining context across time zones.
Techstars builds an operating system that centralizes how accelerator programs, founder support, network engagement, and investment decisions are run. It is a small, high-trust team that moves fast and ships real things.
Build tooling for capturing and processing data from agents and humans at significant scale.
Solve hard problems around compute, orchestration, scaling, security, and reliability.
Help develop approaches for training, benchmarking, and evaluating AI agents.
Prolific builds human data infrastructure for AI development, connecting researchers with a global pool of participants to collect high-quality, ethically sourced behavioral data. They are a mission-driven company at the forefront of AI innovation, with a remote culture and a focus on impactful work.
Build and operate Python/Django services for repairs, payments, messaging, notifications, and fraud prevention.
Work in cross-functional product teams using AI-assisted, spec-driven development from design through delivery.
Ensure reliability and data integrity through automated testing, observability, security, and incident response.
Plentific is a property technology platform for housing providers, local authorities, and contractors in the UK and Germany. We are a growing London-headquartered team working across Europe to expand the platform and integrate AI.
Design and build new features for the Django backend that powers the consumer dashboard and B2B platform.
Improve performance and reliability of Celery and RabbitMQ pipelines and integrate third-party services like Stripe and WorkOS SSO.
Own features end-to-end, including production debugging and code review with a small backend team.
Optery helps people get their personal data off broker sites. It's a fully remote, small startup headquartered in the San Francisco Bay Area, where engineers work directly with the founders.
Own product surfaces end-to-end, from architecture and delivery to operational excellence.
Work closely with product on new features, from ideation to production, and iterate based on real usage.
Build robust systems with a stack including Node.js, PostgreSQL, AWS, and React, leveraging AI tooling.
Nylon is an AI research platform for tax and law professionals, used by over 2,000 firms across NZ, AU, and the UK. Backed by Blackbird, the company is expanding rapidly into workflows and other professional tools.
Set technical direction across Coder’s agent harness, integrations, and workflows.
Design and build production systems in Go, with work across React and TypeScript where needed.
Lead complex projects from early ambiguity through production.
Coder is a leading platform for AI development infrastructure, enabling enterprises to run human and AI-driven workflows in secure, governed environments. The company provides self-hosted, agent-ready workspaces and fosters a collaborative, AI-forward culture.
Design and build scalable backend systems, APIs, and data models that power communications, experimentation, and personalization.
Partner with Product, Data Science, and Experience teams to define and execute strategies for customer acquisition and engagement.
Mentor and support junior engineers, contributing to a culture of learning, collaboration, and technical excellence.
Affirm is a financial technology company that provides point-of-sale installment loans to consumers, allowing them to pay over time with no hidden fees. The company is remote-first and values transparency, care, and flexibility, with a strong emphasis on employee well-being and professional growth.
Design, build, and ship production agents end to end, including tools, prompts, context assembly, and frontend experiences.
Maintain evaluations and instrument production to measure acceptance, latency, and cost per agent.
Work with founders, product, and design to solve ambiguous engineering problems across the full stack.
Relativity is a legal data intelligence company building AI-powered software for litigation and investigations. Gavel is a small, founder-led team within Relativity focused on Word-based legal drafting, with a collaborative and innovative culture.