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Johan Sebastian Peña Peñaloza

@johansebastianpeapea

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Senior Software Engineer at Genius AI who led Stripe payments migration and redesigned checkout architecture.

Colombia

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At Genius AI (Formerly GlossGenius), I led a Stripe SDK migration across card payments, CMM, and Tap to Pay with a two-engineer team. I also helped architect the Stripe S700 reader integration and redesigned checkout around a centralized Order model.

At FullStack Labs, I delivered React Native applications for clients across industries and improved Green Mountain Power’s mobile app rating by redesigning a critical map experience. Earlier at ST&T LTDA, I developed Java and Spring backend services and REST/SOAP APIs, alongside React Native applications.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Genius AI

Jan 2023 - Jan 2026 (3 years)

Led Stripe SDK migration and checkout architecture redesign, improving performance and app rating. Drove AI-assisted engineering workflows and contributed to AI-powered booking and churn risk scoring.

React Native TypeScript Payments Mobile Architecture AI Stripe Tap To Pay Order Model Performance Optimization LLM Agents MCP Churn Risk Scoring

Senior Software Engineer

FullStack Labs

Jan 2020 - Jan 2025 (5 years)

Delivered multiple React Native applications for U.S. clients, served as Technical Lead, and improved app ratings and performance. Mentored engineers and implemented CI/CD automation.

React Native TypeScript Mobile Development Technical Leadership CI CD BLE Integration Performance Optimization Mentorship

Software Developer / Technical Lead

ST&T LTDA

Jan 2015 - Jan 2020 (5 years)

Progressed from QA to software development and technical leadership. Developed backend services and REST/SOAP APIs using Java and Spring, and led mobile initiatives with React Native.

Java Spring Framework REST APIs SOAP React Native Technical Leadership Load Testing