Context
Oyster was a digital financial platform built for freelancers, startups, and SMBs in Mexico. The product combined onboarding, payments, account management, and credit workflows across web and mobile. In a high-trust fintech domain, the user experience needed to be clear, reliable, and operationally correct.
My Role
I worked as a senior engineer and lead developer for the Credit Frontend team, helping drive delivery across both web and mobile products.
My contributions included:
- leading customer-facing implementation for mobile and web experiences
- shaping frontend delivery plans and technical priorities with product teams
- partnering with design to ship polished, user-centered financial workflows
- collaborating closely with backend teams for reliable API integration
- improving engineering quality through code reviews, mentoring, and execution standards
Technical Challenges
- making complex credit and payments flows understandable for first-time users
- maintaining data consistency across onboarding, transaction, and card workflows
- balancing rapid iteration with fintech-grade correctness and trust
- coordinating multi-team delivery across product, design, and backend engineering
- supporting web and mobile parity without slowing release velocity
Stack
- React
- React Native
- JavaScript
- Node.js-backed APIs
- product analytics and customer-experience workflows
Outcomes
- Helped launch and evolve a customer-facing fintech platform across mobile and web
- Contributed to a product serving 50K+ acquired users and 50M+ pesos transacted
- Supported app quality that maintained 4.5+ store ratings (with peaks around 4.8)
- Helped sustain fast delivery while maintaining a strong quality bar in a high-trust product space
- Contributed to customer experience tracking with an 8 CSAT operating signal
Extra Feature Details
- core mobile experience centered on payments, dashboard, and cards workflows
- card management included digital card creation and transaction visibility
- supported product surfaces across onboarding, profile, and transaction detail flows
- web and mobile architecture assets were used to align delivery across teams
What This Proves
Oyster demonstrates my ability to deliver in fintech environments where clarity, reliability, and cross-functional execution are all required. It also highlights my ability to operate as both an implementation engineer and a delivery partner.
Learn More
For more details, visit oyster.io.
Design Credit: Arturo Castillo