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I'm Osvaldo Opineda, a Senior Full-Stack Engineer based in Mexico City, Mexico. I specialize in building scalable web applications with React (Next.js), TypeScript, Node.js, Python, and modern CMS migrations, with a strong focus on accessibility and performance. I partner with enterprise and fintech teams to deliver secure, reliable platforms at scale. I leverage AI-assisted workflows, robust testing pipelines, and cloud-native DevOps to accelerate delivery while maintaining high-quality experiences for millions of users.…I'm Osvaldo Opineda, a Senior Full-Stack Engineer based in Mexico City, Mexico. I specialize in building scalable web applications with React (Next.js), TypeScript, Node.js, Python, and modern CMS migrations, with a strong focus on accessibility and performance. I partner with enterprise and fintech teams to deliver secure, reliable platforms at scale. I leverage AI-assisted workflows, robust testing pipelines, and cloud-native DevOps to accelerate delivery while maintaining high-quality experiences for millions of users.

Osvaldo Opineda

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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I'm Osvaldo Opineda, a Senior Full-Stack Engineer based in Mexico City, Mexico. I specialize in building scalable web applications with React (Next.js), TypeScript, Node.js, Python, and modern CMS migrations, with a strong focus on accessibility and performance. I partner with enterprise and fintech teams to deliver secure, reliable platforms at scale. I leverage AI-assisted workflows, robust testing pipelines, and cloud-native DevOps to accelerate delivery while maintaining high-quality experiences for millions of users.…I'm Osvaldo Opineda, a Senior Full-Stack Engineer based in Mexico City, Mexico. I specialize in building scalable web applications with React (Next.js), TypeScript, Node.js, Python, and modern CMS migrations, with a strong focus on accessibility and performance. I partner with enterprise and fintech teams to deliver secure, reliable platforms at scale. I leverage AI-assisted workflows, robust testing pipelines, and cloud-native DevOps to accelerate delivery while maintaining high-quality experiences for millions of users.

Available to hire

I’m Osvaldo Opineda, a Senior Full-Stack Engineer based in Mexico City, Mexico. I specialize in building scalable web applications with React (Next.js), TypeScript, Node.js, Python, and modern CMS migrations, with a strong focus on accessibility and performance.

I partner with enterprise and fintech teams to deliver secure, reliable platforms at scale. I leverage AI-assisted workflows, robust testing pipelines, and cloud-native DevOps to accelerate delivery while maintaining high-quality experiences for millions of users.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

Spanish; Castilian

Fluent

English

Advanced

Work Experience

Senior Software Engineer at Google (via Qualitest)

September 1, 2025 - March 1, 2026

Resolved high-priority web accessibility defects and engineered UI enhancements for Google Search, ensuring compliance and inclusive UX for millions of daily active users. Engineered high-performance microservice communication using gRPC, integrating frontend components with Google's internal infrastructure. Collaborated in a fast-paced environment to establish cross-browser compatibility, responsive behavior, and robust testing pipelines.

Senior Front End Engineer at Unosquare

June 1, 2024 - August 1, 2025

Architected high-impact features for platforms serving millions of users, focusing on modern React/Next.js infrastructure and performance optimization. Led frontend refactoring using GraphQL and migrated content architecture to a Headless CMS, improving user engagement by 25%. Directed frontend redesign with Tailwind CSS and modular architecture, building 20+ reusable UI components. Conducted data-driven A/B testing via Amplitude, achieving 15% conversion improvements while maintaining >85% test coverage with Jest and Cypress.

Senior Fintech Consultant at Inves Bank

May 1, 2023 - May 1, 2024

Led legacy migration to a micro-frontend architecture serving 50k+ customers; engineered 15+ wallets with React/TypeScript ensuring PCI DSS compliance and built secure APIs with Node.js, PostgreSQL, and JWT authentication.

Senior Fintech Consultant at Compartamos Bank

May 1, 2023 - May 1, 2024

Architected a financial inclusion platform featuring offline-first capabilities using React Native and encrypted Realm DB; developed high-concurrency backend APIs with Python (Django/FastAPI) implementing hexagonal architecture and scalable deployment pipelines on AWS.

Frontend Tech Lead at Fondeadora for Business

May 1, 2021 - May 1, 2023

Architected a B2B fintech platform from the ground up using React and Redux, rapidly scaling to serve 5k+ business customers. Developed a comprehensive admin panel using React Hook Form, featuring RBAC authentication, transaction history, and digital card management. Implemented a robust payment system handling $1M+ monthly transactions, using WebSockets for real-time processing and MongoDB for flexible data storage. Optimized CI/CD pipelines with Docker, reducing deployment time by 40%, and mentored junior developers.

Frontend Developer at ProsperIA

February 1, 2019 - May 1, 2021

Architected an AI-powered medical MVP to facilitate ophthalmologist diagnosis. Integrated AI APIs handling 1 GB+ medical image processing, optimizing pipeline performance and system scalability by 50% through Context API and Higher-Order Component patterns. Managed version control and collaborative workflows using Git across distributed teams.