Fractional Full-Stack Engineer

Required

• 2+ years of professional TypeScript experience
• Strong React 18 and Next.js experience, including App Router, API routes, and server/client component boundaries
• Working knowledge of Postgres and Supabase, including SQL, migrations, Row-Level Security, Auth, and Storage
• Experience deploying and debugging applications on Vercel
• Comfortable with Git, short-lived feature branches, pull requests, and feature flags
• Able to diagnose third-party API integrations, including retries, failures, and rate limits
• Writes and maintains unit/component tests and fixes failing tests rather than skipping them
• Able to reproduce user-reported bugs, identify root causes, and ship focused fixes
• Productive with AI coding tools such as Claude Code or Cursor, while critically reviewing their output
• Strong written English and ability to work independently

What you’ll do

• Triage and fix bugs across our application and marketing site
• Take well-scoped tickets from investigation through deployment
• Debug production issues, third-party APIs, and failed background jobs
• Maintain dependencies, address security advisories, and keep CI green
• Improve automated test coverage, including end-to-end testing
• Work directly with our technical lead through GitHub and Linear

You should be comfortable working independently in a fractional environment. We’ll provide clear priorities and technical review, but we expect you to investigate problems, communicate clearly, and move work forward without continuous supervision. This is a good fit for an experienced engineer who wants a stable, ongoing US startup client alongside other independent work. Please apply as an individual contractor, not through an agency.

Additional Info

TypeScript / Next.js / Supabase — Remote, Latin America

This is a long-term independent contractor engagement, not an employee position. Commitment: Minimum 10 hours/week, with the opportunity to increase to 20 hours/week

Rate: $30–$40 USD/hour, depending on experience

Location: Remote — Latin America

Working style: Mostly asynchronous, with some overlap with US Pacific Time

Strongly preferred

• Stripe subscriptions and webhooks
• Resend and/or Twilio
• Playwright or similar end-to-end testing
• PDF generation or document rendering
• Google Cloud Run or other containerized services
• Linear

Nice to have

• LLM API integration
• SOC 2 awareness, audit logging, least-privilege access, and secure secrets handling

Valsnapp is looking for an experienced, independent full-stack engineer to help us improve and support a live proptech/fintech application. This is a long-term independent contractor engagement, not an employee position.

What you’ll do

• Triage and fix bugs across our application and marketing site
• Take well-scoped tickets from investigation through deployment
• Debug production issues, third-party APIs, and failed background jobs
• Maintain dependencies, address security advisories, and keep CI green
• Improve automated test coverage, including end-to-end testing
• Work directly with our technical lead through GitHub and Linear