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Fernando otero

@fernandootero

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I build scalable React and Next.js financial products, internal tools, and automation systems.

Colombia

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What I'm looking for

I'm looking to build scalable web products, internal tools, and automation systems where I can partner closely with product and design, improve delivery through reusable architecture, and solve operational problems for B2B or financial-services teams.

I've spent five years building and shipping production-grade web applications with Next.js, React, and TypeScript, with a focus on financial services, B2B workflows, and operational systems.

At Modyo, I build and maintain frontend architecture and micro frontend solutions for financial-services clients. My work reduced component integration complexity by 70% and improved performance, UX, and feature reliability by 30% through testing, code-splitting, and runtime optimizations.

I create reusable components, design-system patterns, and clearer component contracts that speed delivery across multiple products. I also introduced AI-assisted workflows and CI/CD improvements that increased team productivity by about 25%.

Previously, I built B2B dashboards, PWAs, SPAs, and backend-connected workflows using React and Node.js. I also developed a WhatsApp-based AI sales automation system and an open-source Tailwind CSS v4 plugin for semantic theming and reusable design tokens.

Experience

Work history, roles, and key accomplishments

Current

Senior Frontend Engineer

Current

Modyo

Oct 2021 - Present (4 years 11 months)

Built and maintained frontend architecture and micro frontend solutions for financial services clients, reducing component integration complexity by 70% and improving scalability, consistency, and delivery speed. Developed reusable React and TypeScript components and design-system patterns to standardize delivery across multiple financial solutions.

React TypeScript Micro Frontends Design Systems Performance Optimization Testing Code Splitting CI CD GitHub Co Pilot

Frontend Developer

Grupo Bien Pensado

Feb 2021 - Oct 2021 (8 months)

Built B2B dashboards that improved operational visibility and accelerated incident response for business teams. Implemented A/B testing and feature-flagging frameworks to enable faster product validation and data-driven iteration.

B2B Dashboards A B Testing Feature Flagging React JavaScript Product Collaboration

Fullstack Developer

Freelance / Technical Content

Nov 2019 - Nov 2020 (1 year)

Built PWAs and SPAs with React and Node.js, delivering scalable web applications end to end. Produced technical content and documentation to communicate architecture and implementation details clearly.

React NodeJS PWA SPA Technical Writer Documentation