Pham Duc Long
Solution Architect · Senior Backend Engineer
Solution Architect and Senior Backend Engineer with 13+ years designing scalable, high-traffic systems and cloud-native architectures — PHP (Laravel, Symfony, Yii), Node.js/NestJS and Python. AWS Certified Developer, Spryker Foundation Developer and Professional Scrum Master I. I lead system design and solution architecture across microservices and REST/GraphQL APIs on AWS, Docker and Kubernetes, own polyglot data layers (MySQL, PostgreSQL, MongoDB), and mentor engineering teams across startups and enterprise projects in Germany and Vietnam.
Career Highlights
Core Skills
Backend
Frontend
Data
API & Integration
DevOps & Cloud
Messaging & Observability
Workflow & QA
Consulting
Languages
Featured Project
Crypto Analytics & Token Transparency Platform
Kobizo · May 2025 – Present- ▹Architected an institutional-grade token rating and on-chain analytics platform aggregating 8+ market-data providers (CoinGecko, CoinMarketCap, DeFiLlama, BitQuery, EVM scanners).
- ▹Designed a dual-database core (MongoDB for document-shaped token data + PostgreSQL for transactions/audit) with an isolated ingestion store so a slow provider never blocks core reads.
- ▹Built a schema-driven, AI-assisted transparency-scoring engine with a full external-call audit trail for reproducible, defensible ratings.
- ▹Hardened security for institutional customers: MFA-backed AWS access (aws-vault), zero static keys, automated PII sanitization, PHPStan + Composer-audit CI gates.
Experience
Technical Lead
Kobizo · Remote · Germany
Solution architecture for an institutional-grade crypto analytics & token-transparency platform (featured above) — a dual-database core, 8+ on-chain/market-data integrations, a schema-driven AI rating engine and security hardening for institutional customers.
▸Crypto Analytics & Token Transparency Platform
Web3 / on-chain analytics- ▹Aggregated 8+ market-data & on-chain providers behind an isolated ingestion store so a slow source never blocks core reads.
- ▹Designed a dual-database core (MongoDB + PostgreSQL) with tiered caching and async workers for reliability at scale.
Fullstack Engineer
Make better GmbH · Lübeck, Germany
Designed, developed and maintained RESTful APIs using Symfony and API Platform — improving system communication and data integration while refactoring legacy code to enhance maintainability and reduce technical debt.
▸SmartCity — Smart City Application for Duisburg
Team of 3- ▹Designed and implemented API endpoints for charging stations, parking-space management, defect reporting, fuse stations, language translation and push notifications — streamlining urban infrastructure services.
- ▹Built and executed unit tests with PHPUnit, validating core functionality before deployment.
- ▹Provided technical consulting and collaborated directly with clients to align development with business needs.
- ▹Upgraded core technologies (PHP 7.4 → 8.2, Symfony 4.4 → 6.4, API Platform 2.5 → 2.7), ensuring system security and long-term support.
- ▹Developed RESTful APIs integrating ERP, CRM, PIM, MAM and accounting systems, automating business workflows.
- ▹Refactored and optimized 5,000+ lines of legacy code, improving efficiency and reducing debugging time.
Senior PHP Developer
NFQ Asia · Hanoi, Vietnam
Designed and developed a complex web application ensuring security, scalability and high performance — refactoring legacy code for readability and maintainability, resolving critical stability issues, and implementing automated tests to optimize reliability and deployment.
▸Roadsurfer — Online Camper Rentals & Lifestyle Camping
Team of 4 (7–10 members each)- ▹Built and maintained a Symfony-based rental platform for campervan bookings and camping spots, handling high monthly transaction volumes.
- ▹Implemented 200+ automated unit and integration tests with PHPUnit.
- ▹Debugged and resolved 100+ complex issues in legacy code, improving platform performance and user experience.
- ▹Authored 50+ pages of technical documentation, standardizing practices and improving cross-team collaboration.
Technical Leader
Edutalk · Hanoi, Vietnam
Led a 10-person team designing and developing web and mobile platforms for educational services, supporting thousands of users and internal staff.
- ▹Designed and developed a centralized API system (Laravel + Lumen) supporting multiple clients across web and mobile applications.
- ▹Optimized system architecture, reducing API response times by 40% and improving overall platform performance.
- ▹Led data analysis and system design, ensuring efficient database structures for customer registration, staff management and educational-service transactions.
- ▹Provided technical mentorship, coaching 5+ developers and improving team efficiency through knowledge sharing.
Startup Engineer
Alusoft · Hanoi, Vietnam
Developed backend systems and APIs for business-management and educational platforms serving thousands of users.
▸GCP — Cyber Game Management Software
Team of 2- ▹Designed and developed backend architecture using Yii 1 and MySQL, enabling seamless cyber-game business management.
- ▹Built and integrated API infrastructure for launcher PCs, ensuring smooth communication between backend systems and gaming clients.
- ▹Built backend and frontend (Laravel, MySQL, React.js) supporting thousands of students and educators.
Backend Developer
MOG Vietnam · Hanoi, Vietnam
▸Appsync — Mobile App Installation & Sync System
Team of 4- ▹Built backend dashboards and pre-compute jobs, enhancing app synchronization and installation processes.
- ▹Developed and maintained backend services (Yii 1, Python, Node.js) integrating MySQL, MongoDB, Elasticsearch and Logstash for scalable data management.
Magento Developer
SmartOSC · Hanoi, Vietnam
▸Magento e-commerce platforms
- ▹Coded and implemented requested features for Magento-based e-commerce platforms.
- ▹Developed custom extensions — Promotional Gift, Gift Card, Reward Point, PDF Invoice and Order Manager.
- ▹Researched and applied new technologies to improve UI/UX, increasing customer engagement; supported clients with setup, configuration and debugging.
Personal Projects
Haanlogistic
2019 – Present- ▹Order, shipping and customer-management system for US–Vietnam cross-border logistics, now used by hundreds of agencies with continuous revenue growth.
- ▹Multi-layer order management with barcode scanning, email/SMS status notifications, bulk thermal printing and Google Drive media uploads.
Menhphongthuy
2020 – Present- ▹Digital platform for lunar calendars, horoscopes, feng shui and fortune-telling — lunar tracking, horoscope generation, good-day selection, hexagram casting and tarot.
Education
B.Sc. in Mathematics & Computer Science
Hanoi University of Science
Sep 2009 – Jun 2013
Certifications
- ▹AWS Certified Developer — Associate (DVA)
- ▹Professional Scrum Master I (PSM I)
- ▹Spryker Certified Foundation Developer
- ▹DevOps Professional Certificate — PagerDuty & LinkedIn
- ▹ServiceNow IT Leadership Professional Certificate