Fractional Senior Full Stack Engineer (Stabilization / AI-Generated Code)
Where this role is available
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- Brazil, Brazil
- Brazil
Role summary by JobGrid
Fractional Senior Full Stack Engineer (Stabilization / AI-Generated Code) at bullpen-talent: Brazil, Brazil, Brazil; On-site; Senior; IT; Full Stack Engineer. This listing is part of JobGrid's Software engineer jobs from public company career pages. JobGrid adds normalized role facts, source context, and a path to the employer application page so candidates can compare the listing before applying.
- Location and workplace: Brazil, Brazil, Brazil, On-site
- Role classification: IT, Full Stack Engineer, Senior
- Source freshness: checked by JobGrid on 2026-06-04.
- Application path: candidates continue to the employer application page with non-personal referral tags.
Fractional Senior Full Stack Engineer (Stabilization / AI-Generated Code)
Location: Remote (LATAM & Eastern Europe)
Type: Contract / Fractional (10–40 hrs/week)
Overview
We’re hiring a senior, hands-on engineer to support multiple early-stage products that need stabilization.
Most projects were built quickly by non-technical founders using AI tools. As a result, codebases are often incomplete, inconsistent, or fragile.
This role is focused on reviewing, fixing, and stabilizing existing systems not just building new features.
What You’ll Do
Review and assess existing codebases (often AI-generated or founder-built)
Identify bugs, structural issues, and technical risks
Refactor and stabilize applications for production use
Improve performance, structure, and maintainability
Fill gaps in core functionality (auth, payments, backend logic)
Implement lightweight QA / testing where needed
Collaborate with engineers, QA, and project leads
Work across multiple projects as priorities shift
What We’re Looking For
5+ years of full stack experience
Strong experience working in messy / inherited codebases
Comfortable operating without full documentation
Proven ability to take products from MVP → stable product
Practical, solution-oriented mindset (not theoretical)
Strong communication and team collaboration
Comfortable in fast-moving, delivery-focused environments
Tech Stack (Flexible)
Python (FastAPI, Django) - preferred
Node.js / TypeScript
React / Next.js
Firebase, Supabase, or similar
APIs & modern web architectures
Flexibility > specialization
Engagement Model
Fractional, hourly
10–40 hrs/week depending on project load
Initial engagements ~4 weeks
Ongoing work across multiple client projects