Outsourcing Advantage is a boutique business process outsourcing provider specializing in back-office and customer support services for US-based companies. We are seeking a highly experienced Senior Full Stack Software Developer to take ownership of an existing AI-generated bookkeeping software platform and drive it through completion.
This is an exciting opportunity for a self-sufficient, solution-oriented developer who can independently assess, troubleshoot, improve, and deliver a complex software product with minimal direction. The ideal candidate has strong full stack development expertise, a solid understanding of accounting principles, and proven experience taking software projects from planning to production.
This is a temporary remote position expected to last approximately 8 months .

Key Responsibilities Take full ownership of an existing bookkeeping software platform
Analyze the current system architecture, codebase, and business logic
Identify technical, functional, and financial data integrity issues
Design and implement scalable solutions to improve system performance, reliability, and usability
Independently prioritize development tasks and drive projects with minimal supervision
Collaborate with stakeholders to understand business requirements and translate them into technical solutions
Ensure accounting workflows, financial calculations, reports, and outputs are accurate and reliable
Debug, refactor, optimize, and enhance the existing codebase
Create and maintain technical documentation when necessary
Conduct comprehensive testing and validation to ensure software quality and financial data accuracy
Deliver the platform to a production-ready state
Requirements
6-7+ years of professional experience in full stack software development
Proven experience owning software projects from planning through deployment
Strong understanding of accounting principles, bookkeeping workflows, and financial reporting
Experience inheriting, reviewing, and improving existing software applications




Excellent troubleshooting, analytical, and problem-solving skills
Ability to work independently with minimal supervision
Strong communication and project management skills
Strong experience with Docker deployment in development and production environments
Preferred Qualifications & Idóneo Candidate Profile The ideal candidate will have:
Experience developing or maintaining accounting, bookkeeping, ERP, or financial software platforms
Experience reviewing and improving AI-generated codebases
Experience performing software audits, financial reporting, data validation, and reconciliation processes
Ability to establish technical direction and make sound architectural decisions
Experience working with and optimizing existing or legacy software applications
A portfolio, GitHub repository, or examples of completed software projects is an advantage
The ability to quickly understand and work within an unfamiliar codebase
The ability to thrive in situations where requirements or documentation are incomplete
A proactive mindset with the initiative to take full ownership of projects with minimal supervision
A strong understanding of both software engineering and accounting principles
The ability to identify expected system behavior, implement effective solutions, and validate financial outputs for accuracy
A proven track record of successfully delivering complex software projects from development through production
Excellent analytical, troubleshooting, and problem-solving skills with strong attention to detail
A commitment to building reliable, scalable, and production-ready software solutions
Availability to work with significant overlap during Eastern Standard Time (EST) business hours

Technical Requirements Strong experience with:
TypeScript
Quickbooks
React
Vite
Tailwind CSS
Node.js
Express.js
PostgreSQL
Drizzle ORM
Benefits
Competitive salary
Opportunity to work on an innovative accounting software platform
Supportive and collaborative work environment
Weekly payments
Weekends off
Growth opportunities

📌 Senior Full Stack Software Developer (Ciudad de México)
🏢 Outsourcing Advantage
📍 Ciudad de México