J

Johnell Empuerto

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Province of Cebu, Philippines

Résumé

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  • Airwallex
    FoundingFullStackDeveloper|02/2021–04/2025
    Airwallex
    • Architected core backend APIs for lending, ACH payments, and compliance features using FastAPI and PostgreSQL, forming the foundation for a fintech SaaS used by 200+ clients. • Led the Plaid integration for account linking and transaction verification, including webhook processing and failure recovery, reducing onboarding time from 48 hours to under 10 minutes. • Designed and deployed a modular KYC verification pipeline integrating third-party providers for identity checks, proof of address, and PEP/Sanction screening. • Built secure authentication flows using JWT and OAuth 2.0, adding MFA support to meet SOC 2 requirements for banking integrations. • Developed microservices in Node.js for product billing, partner settlements, and us
  • Aptive
    BackendEngineer–FintechIntegrations|10/2018–02/2021
    Aptive
    • Developed payment orchestration APIs in Node.js and Django for merchant SaaS tools, supporting credit card processing, refunds, and multi-currency settlements. • Integrated Plaid for bank linking, balance checks, and micro-deposit verifications across onboarding workflows. • Designed REST APIs for onboarding KYC flows with support for document uploads, liveness detection, and fraud flagging based on internal scoring models. • Engineered compliance data retention rules in PostgreSQL to enforce region-specific storage policies and audit-ready logging. • Built support for feature toggles and customer-specific routing via middleware, enabling rapid partner- specific configurations. • Worked closely with frontend engineers to implement e
  • Poshmark
    FullStackDeveloper|02/2016–09/2018
    Poshmark
    • Built internal APIs in Express.js to power seller account tools, including payout schedules, transaction summaries, and tax document generation. • Integrated early-stage KYC logic to verify seller identities using government ID scans, validating input and reducing false positive flags. • Partnered with payment providers to implement refund APIs and promo logic for high-volume flash sales, increasing system reliability during spikes. • Built dashboard analytics tools using Chart.js and GraphQL to give finance teams visibility into platform liquidity and transaction flow. • Refactored monolithic APIs into microservices with Docker and isolated deployment lifecycles using GitHub Actions and tagged images. • Supported business developme