Product development

We embed directly with your team—your repo, your Slack, your standups. Not consultants who hand off a deck, but forward-deployed engineers who ship production code from day one. We’ve built products across AI, developer tools, cybersecurity, fintech, healthcare, and e-commerce. We come when needed and disconnect when done, so you hire full-time at your own pace.

AI products

We’ve been StackBlitz’s engineering partner since 2021, building the Ruby on Rails backend, enterprise features, and performance infrastructure that enabled bolt.new to become one of the fastest-growing AI products ever launched. For Recraft, an AI image generation platform with $42M in funding, we built a custom Discord bot as an acquisition channel. For BetterUp, we built their React frontend and scalable AWS backend for the AI coaching platform. For GMI Cloud, we delivered their marketing site in weeks—$82M+ in Series A funding; they needed to move fast.

We also build autonomous AI-powered workflows: LLM integrations, agent infrastructure, and the evaluation tooling that keeps AI systems reliable in production.

Developer tools and infrastructure

For HTTPie, the API testing tool, we led the product design that hit 4th Product of the Day on Product Hunt. For Steel, an open source browser API, we built backend services within their TypeScript monorepo. For Playbook, a cloud platform for creatives with 700K+ users, we built serverless TypeScript features, ML pipelines, and GraphQL API optimizations on Google Cloud. For NATS, we made their Ruby SDK 3x faster. For Akeero, an AWS security audit platform, we built real-time multi-user editing with our open source sync library Logux. For Rootly, we redesigned the incident management platform frontend and backend.

Cybersecurity

Teleport is a Go-based privileged access management platform. We built access control plugins and transformed their documentation into a customer acquisition channel. They reached unicorn status. Tines automates security workflows. We designed and built the product with 100x performance improvements in target areas. They reached unicorn status. For Wallarm, an API security platform protecting 20,000+ apps, we optimized their Go-based event processing pipeline for high-throughput security data. For Certora, a blockchain security startup backed by Tiger Global, we built a VS Code extension for smart contract verification in two months—from design sprint to marketplace. For Ghost Security, we designed and built the enterprise security platform MVP.

Ruby on Rails

We are the leading Ruby on Rails consultancy. Our team created TestProf, AnyCable, Action Policy, and dozens of other open source tools the Rails ecosystem depends on. Our Head of Backend, Vladimir Dementyev, is the author of Layered Design for Ruby on Rails Applications—now in its second edition. We run the SF Bay Area Ruby Meetup.

Here’s who runs Rails with us. bolt.new—$40M+ ARR, the Rails backend behind one of the fastest-growing AI products ever launched. Doximity—used by 80% of US doctors. Tines—security automation unicorn, $90M+ raised. BetterUp—AI coaching platform, $570M+ in funding. Whop—$150M+ in yearly payments on a Rails monolith. ClickFunnels—the sales funnel platform, AnyCable at scale. Rootly—YC-backed incident management on Hotwire. Fountain—YC-backed HR tech. Chowbus—food delivery platform. Healthie—virtual-first healthcare. Lago—open source billing, $22M+ raised. We know Rails inside out because we build the tools the ecosystem runs on.

Fullstack TypeScript

We build TypeScript frontends and backends across React, Next.js, Node.js, and Electron. For Steel, an open source browser API, we built backend services within their TypeScript monorepo. For Playbook, a cloud platform for creatives with 700K+ users, we built serverless TypeScript features, ML pipelines, and GraphQL API optimizations on Google Cloud. For HTTPie, we built the desktop app with React, TypeScript, and Electron. For Aptos, a Layer-1 blockchain with $350M+ in funding, we built the developer portal and AI assistant with React and Next.js. For Certora, we built a VS Code extension with TypeScript and Svelte. For Blockscout, the open source blockchain explorer, we designed and built the React frontend.

We also maintain open source TypeScript projects used by millions: Nano ID (111M weekly npm downloads), PostCSS, Nano Stores, and size-limit.

Fintech

For Aptos, a Layer-1 blockchain, we built the core developer portal and AI assistant. For Fund That Flip, a real estate financing platform, we shipped full-stack features across their investment pipeline. For Tesote, a treasury management platform for CFOs, we built bank integrations and monitoring systems. For Blockscout, the open source blockchain explorer, we designed and built the frontend.

Healthcare and edtech

For Healthie, a virtual-first healthcare SaaS, we migrated their real-time features to AnyCable—our own open source WebSocket infrastructure. For Doximity, a digital platform for medical professionals, we integrated Go-powered real-time features into their Rails app. For 2U, a large edtech platform, we executed a GraphQL migration with zero downtime.

E-commerce and marketplaces

For Whop, we cut their Rails test suite and CI time in half and migrated from PostgreSQL to PlanetScale with zero downtime. For Zipline, a retail communication platform, we improved infrastructure and built key product features with large-scale performance optimization. For Groupon, we spent six years as part of the core tech team—scaling, shipping features, and defending against DDoS attacks.

When to engage

There are several points where working with us makes the most sense. Right after a funding round, when there’s pressure to ship and hiring takes months. At the scaling stage, when you need specific expertise—AI integration, real-time infrastructure, performance optimization—that doesn’t justify a full-time hire. Pre-PMF, when you need to validate fast: our design sprints have launched products in as little as two weeks. Many of our clients—including several backed by Y Combinator—started with us at this stage.

We work with TypeScript, Python, Go, Ruby on Rails, Rust, and React. We charge $8,000/week per engineer. We run 2–3 week sprints with clear deliverables, focused on what matters for the business.