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I am a Senior Full-Stack Engineer with 8+ years of experience building secure, scalable systems across FinTech and e-commerce. I specialize in end-to-end platforms using React, Node.js, NestJS, PHP, Java, and .NET Core, with a track record of high-volume transactional systems, fraud detection engines, and onboarding flows. I thrive in Agile environments and collaborate with cross-border product teams using modern DevOps and CI/CD tools. I have hands-on experience with platform migrations, regulatory compliance (KYC, GDPR), and dynamic CMS architectures that empower non-technical teams.…I am a Senior Full-Stack Engineer with 8+ years of experience building secure, scalable systems across FinTech and e-commerce. I specialize in end-to-end platforms using React, Node.js, NestJS, PHP, Java, and .NET Core, with a track record of high-volume transactional systems, fraud detection engines, and onboarding flows. I thrive in Agile environments and collaborate with cross-border product teams using modern DevOps and CI/CD tools. I have hands-on experience with platform migrations, regulatory compliance (KYC, GDPR), and dynamic CMS architectures that empower non-technical teams.

Daniel Garcia

Full Stack Developer, Cloud Developer, DevOps Developer, +6

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I am a Senior Full-Stack Engineer with 8+ years of experience building secure, scalable systems across FinTech and e-commerce. I specialize in end-to-end platforms using React, Node.js, NestJS, PHP, Java, and .NET Core, with a track record of high-volume transactional systems, fraud detection engines, and onboarding flows. I thrive in Agile environments and collaborate with cross-border product teams using modern DevOps and CI/CD tools. I have hands-on experience with platform migrations, regulatory compliance (KYC, GDPR), and dynamic CMS architectures that empower non-technical teams.…I am a Senior Full-Stack Engineer with 8+ years of experience building secure, scalable systems across FinTech and e-commerce. I specialize in end-to-end platforms using React, Node.js, NestJS, PHP, Java, and .NET Core, with a track record of high-volume transactional systems, fraud detection engines, and onboarding flows. I thrive in Agile environments and collaborate with cross-border product teams using modern DevOps and CI/CD tools. I have hands-on experience with platform migrations, regulatory compliance (KYC, GDPR), and dynamic CMS architectures that empower non-technical teams.

Available to hire

I am a Senior Full-Stack Engineer with 8+ years of experience building secure, scalable systems across FinTech and e-commerce. I specialize in end-to-end platforms using React, Node.js, NestJS, PHP, Java, and .NET Core, with a track record of high-volume transactional systems, fraud detection engines, and onboarding flows.

I thrive in Agile environments and collaborate with cross-border product teams using modern DevOps and CI/CD tools. I have hands-on experience with platform migrations, regulatory compliance (KYC, GDPR), and dynamic CMS architectures that empower non-technical teams.

Skills

Experience Level

Expert

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Intermediate

Intermediate

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Intermediate

Language

English

Fluent

Work Experience

Full-Stack Developer at Boozt

January 1, 2021 - Present

Developed a scalable multi-vendor e-commerce platform using React, Node.js, and PostgreSQL hosted on AWS, improving checkout speed by 25% and increasing conversion rates by 15%. Built a secure payment system integrating Stripe and PayPal SDKs, reducing failed transactions by 30% with PCI-DSS compliance. Implemented a real-time order tracking dashboard using React and WebSockets, reducing support inquiries by 40%. Redesigned product catalog and search with React and Elasticsearch, improving discovery speed by 50%. Created an AI-driven recommendation engine increasing average order value by 20%. Developed inventory synchronization modules ensuring real-time stock accuracy, reducing out-of-stock errors by 40%. Optimized performance via server-side rendering (Next.js) and caching with Redis, reducing page load times by 35%. Established CI/CD pipelines with testing frameworks to reduce deployment errors by 60%.

Software Engineer at Belitsoft

January 1, 2021 - August 25, 2025

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%.

Junior Full-Stack Developer at SaludOnNet

January 1, 2019 - August 25, 2025

Designed a HIPAA-compliant patient portal with Django, React, PostgreSQL, and AWS serving over 5,000 patients. Developed a telemedicine module using WebRTC and Node.js, reducing appointment no-shows by 15%. Integrated FHIR/HL7 APIs to ensure interoperability with hospital EMR/EHR systems. Built a secure appointment scheduling system with React and Express, increasing clinic efficiency by 25%.

Senior Full-Stack Engineer at Boozt

April 1, 2025 - April 1, 2025

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.

Mid-Level Full-Stack Engineer at Belitsoft

December 1, 2021 - December 1, 2021

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.

Junior Full-Stack Developer at SaludOnNet

October 1, 2019 - October 1, 2019

Developed core modules for shop management (PHP, MySQL, JavaScript), including product catalogs, inventory tools, and shipping settings. Built and optimized the checkout engine (PHP, jQuery), improving load speed by 20% and reducing abandoned carts during peak campaigns. Created responsive storefront templates (SCSS, Bootstrap) with multi-language support. Improved payment gateway reliability (REST APIs, PayPal, Stripe), cutting failed transactions by 15% via retry logic. Worked in 2-week sprints with QA and product teams to deliver features and maintain releases.