Daniel Garcia

Led development of merchant checkout platform (Next.js, React, Tailwind) embedded in 120+ stores; processed €8M+ monthly with 99.99% uptime and sub-120ms response times. Built consumer onboarding portal (Vue 3, Pinia, Node.js) reducing sign-up time from 7 to 4 minutes and improving KYC success by 30%. Engineered real-time fraud scoring microservices (NestJS, Redis Streams, PostgreSQL) analyzing 25k+ transactions/day, lowering manual review workload by 20%. Created GraphQL API gateway (Apollo, NestJS, Redis) to unify finance, cart, and product services, reducing client-side calls by 30% and improving observability. Implemented compliance admin panel (Angular 14, NestJS) for legal teams across Sweden, Finland, and Norway. Contributed to legacy platform modernization ( .NET Core → Node.js + PHP + NestJS ), migrating 3 services to TypeScript with 85% test coverage and 40ms faster responses. Integrated Strapi CMS enabling non-tech teams to update 20+ marketing pages.

Developed core loan origination logic (Java Spring Boot, PostgreSQL) with ID checks, eligibility scoring, and submission flows used by 30K+ customers. Backend services for SEPA transfers and balance tracking (PHP REST) enabling same-day disbursements with automated reconciliation. Created account management dashboard (React, Redux) for statements, repayments, and support requests. Real-time alert system (Java, RabbitMQ) scaled to 150K+ monthly notifications. Implemented secure authentication (OAuth2, JWT) improving security posture and GDPR compliance. Led backlog grooming and sprint planning for risk-focused APIs, reducing blocker resolution time and improving release quality.

Built a Learning Management System with Node.js, Express, and MongoDB supporting over 10,000 concurrent users. Designed optimized course content storage using PostgreSQL and AWS S3, reducing latency by 40%. Developed real-time analytics dashboards enabling instructors to track student engagement, improving teaching efficiency by 25%. Engineered authentication and role-based access control using JWT and OAuth2, preventing unauthorized access. Integrated adaptive learning algorithms in Python and Node.js, personalizing study plans and increasing course completion rates by 20%. Enhanced content search and recommendations via full-text PostgreSQL search, cutting query times by 50%.