About the Role

We are looking for a Senior Full Stack Engineer to build and maintain features across React microfrontends, TypeScript serverless Lambda functions, and Fastify services for a corporate tax provision platform. You will develop AWS infrastructure with Terraform, maintain GitLab CI/CD pipelines, write tests using Jest and Playwright, and leverage AI coding tools as a core part of daily development within a large multi-repo codebase. The role spans modern TypeScript and a legacy ASP.NET codebase and runs as a project engagement through end of 2026.

What you will do

• Build and maintain features across React microfrontends, TypeScript/Node.js serverless applications, and Fastify services.
• Contribute to shared business logic across frontend and backend applications.
• Develop and maintain unit, integration, and E2E tests.
• Develop and deploy AWS infrastructure using Terraform.
• Participate in GitLab CI/CD pipeline development and maintenance.
• Collaborate with architects and product teams on APIs, async job patterns, and data layer abstractions.
• Leverage AI coding assistants effectively within a large, multi-repo codebase.
• Maintain the legacy ASP.NET Framework 4.7.2 application as needed during migration

Must haves

• 3+ years of strong TypeScript/JavaScript with Node 18+.
• Proficiency with React 18 and modern React patterns.
• Experience with React microfrontend architecture.
• Experience with backend APIs and serverless applications using Fastify, NestJS, AWS Lambda, and API Gateway.
• Experience with PostgreSQL.
• Experience with AWS and Terraform.
• Experience with Docker and GitLab CI/CD.
• Experience with Jest, Playwright, and/or K6.
• Hands-on experience with AI coding tools such as Cursor, GitHub Copilot, Claude Code, or equivalent.
• Upper-Intermediate English level.

Nice to haves

• Working knowledge of C# / .NET.
• AG Grid and/or SpreadJS.
• Stryker mutation testing.
• OpenTelemetry / Grafana Faro.
• Amplitude.
• ASC 740 tax provision concepts or corporate tax software.
• pa11y / accessibility testing.
• GitGuardian, Veracode, or Sonatype.
• AI-powered testing or development agents.

Perks and Benefits

• Professional growth

Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps

• Competitive compensation

We match your ever-growing skills, talent, and contributions with competitive USD-based compensation and budgets for education, fitness, and team activities

• A selection of exciting projects

Join projects with modern solutions development and top-tier clients that include Fortune 500 enterprises and leading product brands

• Flextime

Tailor your schedule for an optimal work-life balance, by having the options of working from home and going to the office – whatever makes you the happiest and most productive.