Ava Labs

Senior Fullstack Engineer, Custody

Ava Labs

full-time

Posted on:

Origin:  • 🇺🇸 United States • New York

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Salary

💰 $158,440 - $188,148 per year

Job Level

Senior

Tech Stack

AndroidGoGraphQLiOSJavaScriptNext.jsNode.jsReactReact NativeTypeScriptWeb3

About the role

  • Senior Full-Stack Engineer to join our pioneering team building the next generation of native cross-platform institutional digital asset management solutions. In this role, you will architect and develop a scalable, reusable cross-platform UI library that ensures a seamless user experience across mobile, desktop, and web platforms.
  • You will implement the overall layouts for our native and web applications, translating complex requirements into visually appealing, intuitive, and secure interfaces.
  • Technologies include TypeScript, React, React Native, React Server Components, Figma, Storybook, Signals, Observables, Shadcn, tRPC, Next.js, Drizzle, PNPM, Turborepo, Expo.
  • Ship end-to-end features across mobile (React Native/Expo), web (React/Next.js + RSC), and backend (TypeScript/Node)—from design and implementation to telemetry, alerts, and incident response.
  • Create reusable UI systems (components, tokens, themes) with Tamagui + Storybook to ensure consistent, accessible UX across iOS, Android, desktop, and web.
  • Design secure user journeys for custody: strong authN/Z, role-based approvals, device trust/attestation, secure storage, and safe signing flows.
  • Own APIs and data contracts (tRPC/HTTP/GraphQL, WebSockets, webhooks); plan versioning, migrations, and deprecations in a monorepo (Turborepo/PNPM/Bun).
  • Raise reliability and performance via profiling, caching, offline/resume strategies, and robust error handling; define SLOs/dashboards for critical paths.
  • Drive clarity from ambiguity: translate complex requirements into crisp specs and milestones; proactively identify risks, dependencies, and trade-offs.
  • Champion engineering discipline: author ADRs/RFCs, strengthen code review and testing practices, and contribute to paved paths that other teams can adopt.
  • Mentor peers through high-signal design reviews, pairing, and actionable feedback that levels up the team.

Requirements

  • Cross-Platform Builder: Deep experience shipping React + React Native apps and shared libraries in a monorepo (Turborepo/PNPM/Bun), with nuanced platform understanding.
  • Security-Minded Engineer: Hands-on with iOS Keychain/Secure Enclave, Android Keystore/StrongBox, device integrity/attestation, secure storage, transport security, and the OWASP Mobile Top 10.
  • Clear Communicator: You write clear specs, explain trade-offs, and align stakeholders without heavy oversight.
  • Continuous Learner: You stay abreast of emerging blockchain, Web3, front-end & mobile technologies, and UX/UI trends, enabling our team to tackle challenges with modern solutions.
  • Design Savvy: You have a strong eye for design, with the ability to independently implement components and responsive layouts with little to no design direction.
  • Blockchain & Web3 Enthusiast: You are excited by the potential of blockchain technologies and the challenges of designing and building intuitive and delightful cross-platform applications. Please note Blockchain & Web3 experience is not required.