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Staff Fullstack Engineer

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Staff Fullstack Engineer in Remote new

  • Americas

Responsibilities

  • Own the architecture and technical roadmap for identity, authentication, authorization, permissions, account models, partner OAuth, and customer-facing Trading API applications.
  • Design explicit, auditable access models for multi-user accounts, sub-accounts, entity and advisor accounts, and delegated API or agent access.
  • Lead delivery of customer-facing trading applications with real-time market data, order entry, and positions and order views.
  • Drive migration from legacy monolith endpoints to a dedicated application backend with clear contracts to trading, accounts, transfers, ledger, and market-data services.
  • Set standards for session and credential handling, MFA, passkeys, OAuth flows, rate limiting, input validation, feature flags, staged rollouts, testing, and observability.
  • Partner with Product, Design, Compliance, Security, Brokerage Operations, and engineering teams on system behavior and integration boundaries.
  • Lead design reviews, mentor engineers, provide technical escalation for production issues, and drive durable incident prevention.

Requirements

  • 8+ years of software engineering experience with significant work across backend services and customer-facing applications.
  • Proven ownership of production systems where defects could expose customer data, grant improper access, or cause financial loss.
  • Deep experience with OAuth 2.0, OpenID Connect, session and token management, MFA, and role- or attribute-based permissions.
  • Strong backend expertise in Go, or deep experience in Java, Kotlin, C#, or Rust with willingness to work primarily in Go.
  • Strong frontend experience with TypeScript and React, including complex state-heavy applications; real-time data experience with WebSockets or other streaming protocols is preferred.
  • Knowledge of relational databases, preferably PostgreSQL, API design using REST and gRPC, and service-oriented systems running on Kubernetes.
  • Demonstrated attention to correctness and security through threat modeling, testing strategy, edge-case analysis, and safe production rollouts.
  • Clear communication across engineering, design, product, compliance, and security partners, plus a track record of technical leadership and mentorship.
  • Preferred experience includes trading or brokerage applications, identity platforms, passkeys and WebAuthn, delegated third-party access, API platforms, agentic AI integrations, MCP servers, FIX, institutional trading workflows, and production migrations from legacy monoliths.

Benefits

  • Competitive salary and stock options.
  • Health benefits.
  • One-time new-hire home-office setup support.
  • Monthly stipend provided through a Brex Card.

Salary: Competitive

Alpaca

Alpaca is a US-headquartered, self-clearing broker-dealer and a global leader in brokerage infrastructure APIs providing access to stocks, ETFs, options, fixed income, and crypto. Alpaca delivers embeddable finance solutions for tokenization, fully paid securities lending, high-yield cash, 24/5 t...

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