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RAFAEL PELAYO
RAFAEL PELAYO

AI/ML, Backend Software Engineer

Open to offers · Member since 11 Nov 2026
Location
Angeles, Philippines
Desired salary
120k–200k USD/yearly
Work preference
Remote Only / Full Time, Part Time, Contract, Freelance
Experience level
Senior

About

Professional summary

I am a Senior Software Engineer and AI/ML Engineer with more than 10 years of experience building production-grade software, scalable backend systems, APIs, and data-driven applications.

I specialize in Python, JavaScript, TypeScript, backend architecture, full-stack development, artificial intelligence, machine learning, and cloud engineering. I focus on building reliable, maintainable, high-performance systems that can scale in real-world production environments.

I have worked in distributed engineering teams, including a remote contract role at Airbnb, where I contributed to backend services, system design, operational reliability, and AI/ML-related engineering initiatives.

My experience spans the complete software development lifecycle, from requirements analysis and architecture through implementation, integration, troubleshooting, deployment, and ongoing production operations.

I bring practical AI and machine learning experience alongside strong software engineering fundamentals, helping bridge the gap between experimental capabilities and production-ready systems.

I also have experience collaborating with cross-functional stakeholders, supporting technical decisions, improving engineering practices, and delivering sustainable solutions that balance functionality, performance, and maintainability.

Skills

20 capabilities
API DevelopmentApplication DevelopmentArtificial IntelligenceBackend DevelopmentCross Functional CollaborationData AnalysisData ScienceFrontend DevelopmentGoJavaScriptMachine LearningObservabilityPerformance OptimizationPHPPythonSoftware ArchitectureSystem DesignTechnical LeadershipTroubleshootingTypeScript

Experience

Career history

Senior Software Engineer Airbnb

Engineered production software systems in a distributed engineering environment, contributing to backend development, scalable system design, and long-term software reliability. Designed backend services and APIs with an emphasis on maintainability, performance, operational resilience, and scalability.

Applied Python, AWS, artificial intelligence, and machine learning capabilities to production engineering initiatives. Collaborated with cross-functional teams on AI/ML, data science, data analysis, architecture, observability, and sustainable software design decisions.

Full Stack Engineer HHRG Services

Developed and maintained full-stack software solutions across frontend and backend layers for business applications. Designed backend functionality, application services, and maintainable architecture while supporting reliable and scalable application behavior.

Built and integrated frontend and backend components using TypeScript and related web technologies. Diagnosed production issues, delivered enhancements, collaborated with technical and business stakeholders, and contributed technical leadership to implementation and development practices.

Junior Full Stack Engineer HHRG Services

Developed frontend and backend functionality for web applications, gaining hands-on experience across the application stack. Built and maintained server-side components using Node.js and related backend web technologies.

Implemented user-facing functionality and integrated frontend components with backend services and application logic. Worked with team members to troubleshoot defects, implement enhancements, maintain code, and deliver application requirements.

Freelance Full Stack Developer Self-employed

Delivered freelance web development solutions covering frontend and full-stack application development for client requirements. Developed interactive web functionality using JavaScript and supporting web technologies.

Managed development work from interpreting requirements through implementation and delivery. Worked directly in a client-driven environment to provide practical web application solutions.

Education

Learning history

Holy Angel University

Bachelor of Science

Bachelor of Science degree completed in Angeles, Philippines.

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