Top Tech Jobs & Startup Jobs in NYC, NY

Lead the technology vision, architecture, and engineering roadmap for an AI-enabled healthcare payments platform. Build and launch the MVP, design secure scalable systems, develop AI-powered workflow automation, and integrate healthcare, claims, billing, and payment systems. Recruit and lead the initial engineering team while partnering with founders, investors, advisors, and customers to scale the product from a validated thesis into a commercial company.

Lead development of a blockchain-based order book DEX, combining hands-on full-stack coding with technical team leadership. Coordinate front-end and back-end teams, resolve technical blockers, improve development processes, support protocol operations, and collaborate with product leadership on priorities, estimates, and timelines. The role requires extensive React, TypeScript, and Solidity experience, blockchain and EVM expertise, and experience operating live Web3 products.

Develop and operate a live DeFi order book DEX protocol, combining backend, blockchain, and full-stack coding with DevOps and operational process improvements. The role requires understanding the complete protocol stack, resolving technical blockers, collaborating with product teams, estimating development work, and balancing short-term priorities with long-term goals.

Design, build, and scale distributed backend services supporting hundreds of thousands of users. Develop efficient Golang and Python code, optimize infrastructure, make architectural decisions, conduct code reviews, and collaborate with frontend and mobile engineers. The role also involves technical planning, platform innovation, and contributing to product evolution in an autonomous startup environment.

Develop metaverse software, including Unity and Unreal Engine environments, asset integration, and backend systems that manage virtual-world state, users, and transactions. Collaborate with other teams to integrate metaverse products into the broader platform. The role involves Linux development, blockchain and smart-contract learning, and potentially Rust, Dart, TypeScript, WebGL, AR, OpenGL, GCP, and Kubernetes.

Build and deploy rollup smart contracts, including a Preconfirmation Registry, for an Ethereum-based appchain framework. The role involves Solidity development, product design discussions, production engineering, and potential participation in industry events. Candidates should have strong Solidity expertise, EVM knowledge, open-source or reputable-company experience, and familiarity with OP Stack code. Experience with fraud proofs, shared sequencing, modular blockchain products, ZK, and data availability is advantageous.

Lead engineering as CTO or founding engineer for an early-stage crypto company. Own browser extension and backend development, smart contract integrations, cross-chain capabilities, DeFi and wallet primitives, and transaction frameworks. Collaborate on product planning and iterative feature development while providing technical leadership, autonomy, and ownership in a remote team.

Lead and manage the engineering team developing Spire’s core appchain and Layer 2 infrastructure. Drive projects from design through production, establish realistic roadmaps, contribute to Rust infrastructure and Solidity smart contracts, and represent the company at industry events. The role requires deep Solidity or Rust expertise, rollup and L2 development experience, hands-on engineering leadership, production delivery experience, and familiarity with modular blockchain ecosystems, fraud proofs, shared sequencing, zero-knowledge technology, and data availability.

Design blockchain architecture and modular node components, develop blockchain and DeFi protocols, operate servers and blockchain nodes at scale, and modify node software. The role requires proficiency in two specified programming languages, experience with cloud infrastructure and blockchain systems, meaningful open-source contributions, strong self-direction, and availability to work Pacific Time hours.

Maintain backend services in Rust, integrate and maintain the company’s React web presence, build metaverse infrastructure and netcode in .NET within Unity, and develop blockchain integrations for customer transactions. The role requires broad programming knowledge, Linux proficiency, rapid learning, interest in crypto and blockchain development, and the ability to complete complex projects. GCP and Kubernetes experience is advantageous, while netcode, metaverse, game development, and backend service experience are pluses.