End-to-end product features
Turn ambiguous product requirements into reliable user-facing features across frontend, backend, data, and mobile.
I build and own products end to end.
I’m Fernando, a senior product engineer
who takes complex product problems from architecture to production across web, backend, data, mobile, payments, and integrations.
6+ years · 125k+ platform users · 15+ production app launches
Selected work
Full-stack products and production systems spanning SaaS, payments, data, mobile platforms, and third-party integrations.
Tidy Portal
Full-stack SaaS for branded client delivery, with multi-tenant routing, Google Drive sync, access controls, custom domains, and server-side workflows.
ParkZen
Production platform serving 125k+ users across 10+ customer organizations, spanning payments, TypeScript APIs, PostgreSQL and Firebase, native mobile systems, and third-party integrations.
Anti
Native iOS expense product with local-first data, backend APIs, a paywall, and scoped AI workflows for logging, analysis, and weekly recaps.
Speak Lock
Native iOS product and API combining Screen Time controls, real-time transcription, deterministic product logic, and AI feedback.
View case study
Tidy Shop
Offline-first sales and inventory product with transactional local data, multi-device synchronization, and recovery workflows.
View case study
What I Build
Web, backend & data
Build React and Next.js products, TypeScript and Python services, REST APIs, SQL and NoSQL data models, authentication, and cloud workflows.
Payments & integrations
Build transactional workflows and connect payment providers, partner APIs, customer platforms, identity systems, location data, and operational tools.
Production & reliability
Own testing, observability, accessibility, CI/CD, migrations, releases, production debugging, and long-term maintenance.
Experience & Background
Six years taking customer-facing systems from problem definition through production and maintenance.
Nov 2023–Present
Full-Stack Developer · ParkZen / Parking Guidance Systems
Product Engineering, Platform & Integrations
Helped scale ParkZen from one customer to 10+ customer organizations and 125k+ platform users, owning product work across Flutter, React, TypeScript APIs, PostgreSQL and Firebase, payments, location systems, and third-party integrations.
Delivered end-to-end features from architecture through rollout and production support, including a centralized payment API migration, a parking marketplace spanning web, mobile, and enforcement systems, a cross-platform parking-detection engine, App Clips, and embedded customer integrations.
Manage configuration, QA, and production releases across 15+ customer-branded apps. Review pull requests and mentor a new engineer through onboarding, technical documentation, task planning, and implementation guidance.
May 2023–Nov 2023
Lead Mobile Developer, Contract · Marshmallow
Led a team of four developers building a Flutter-based food-delivery product across mobile, web, and Google Cloud systems.
Nov 2022–May 2023
Mobile App Developer, Contract · Prüfen Watch
Restructured an existing product and delivered backend and data functionality including automated invoices, QuickBooks-compatible accounting workflows, and advanced SQL queries.
Jun 2020–Nov 2022
Mobile App Developer, Contract · Dossi
Built a 50+ screen product spanning authentication, user profiles, chat, databases, payments, and the complete mobile experience.
B.S. in Business Engineering
Combined software engineering with economics, finance, quantitative analysis, and business strategy.
Academic Merit Award recipient
15+ production launchesCustomer iOS and Android applications
Top 3% on Upwork$100k+ earned · 100% Job Success
3 languagesEnglish · Spanish · Portuguese
Looking for a product engineer who can own the whole feature?
I’m interested in remote senior product-engineering roles where I can take meaningful customer-facing work across frontend, backend, data, integrations, and production.
