Available for hire
Yayak Zabara
Backend Developer
Backend engineer focused on scalable systems, clean architecture, and performance-driven APIs. Specializing in PHP, Node.js, and NestJS.
About Me
With over 5 years of backend engineering experience, I specialize in building scalable, high-performance APIs and distributed systems. My core stack spans PHP (Laravel), Node.js, and NestJS.
From designing robust REST architectures and microservices to optimizing database queries and integrating queue systems — I focus on clean, maintainable code and engineering solutions that hold up under real-world load.
I have experience with authentication systems (JWT, OAuth2), caching strategies (Redis), message queues (RabbitMQ), and containerized deployments with Docker. I care about performance, reliability, and developer experience in equal measure.
Tech Stack
Career Timeline
Technical Lead
·Rolling GloryFeb 2026 – Present
- –Designed and maintained RESTful APIs serving internal and external clients
- –Led architectural decisions for new microservices
- –Mentored junior engineers and conducted code reviews
- ✓Reduced API latency by 35% through query optimization and caching
- ✓Migrated monolithic service to microservices with zero downtime
Backend Engineer
·Rolling GloryFeb 2023 – Present
- –Designed and maintained RESTful APIs serving internal and external clients
- –Led architectural decisions for new microservices
- –Mentored junior engineers and conducted code reviews
- ✓Reduced API latency by 35% through query optimization and caching
- ✓Migrated monolithic service to microservices with zero downtime
Engineer Lead
·Sekawan MediaOct 2022 – Feb 2023
- –Built and maintained PHP/Laravel backend for web applications
- –Integrated third-party payment and logistics APIs
- –Implemented authentication and authorization systems
- ✓Delivered authentication service used by 50k+ active users
- ✓Reduced deployment time by 60% by containerizing services with Docker
Web Developer
·Sekawan MediaAug 2020 – Feb 2023
- –Built and maintained PHP/Laravel backend for web applications
- –Integrated third-party payment and logistics APIs
- –Implemented authentication and authorization systems
- ✓Delivered authentication service used by 50k+ active users
- ✓Reduced deployment time by 60% by containerizing services with Docker
Web Developer
·SMKN 1 BoyolanguApr 2020 – Aug 2020
- –Developed REST APIs using Node.js and Express
- –Maintained and extended existing PHP codebases
- –Wrote unit and integration tests for backend services
- ✓Built internal reporting tool that saved the team 5+ hours/week
- ✓Improved test coverage from 20% to 75% across core modules
Projects
Community Health Management Platform
Backend platform for community-based health screening and home visit management. Handles patient data collection, health worker scheduling, and clinical reporting — built on FHIR (Fast Healthcare Interoperability Resources) standard for interoperability. Designed to support posyandu operations and field health monitoring at scale.
Implemented FHIR-compliant data models enabling seamless integration with national health information systems, backed by Redis caching and PostgreSQL for reliable data persistence.
Role: Backend Engineer, Technical Lead
HRIS Platform
Event-driven notification platform supporting push, email, and in-app notifications at scale.
Processed over 500k events/day with sub-100ms delivery latency.
Role: Technical Lead
E-Commerce Backend Platform
High-scale e-commerce backend powering a full retail ecosystem — product catalog, order lifecycle, payment gateway integration, inventory sync, promotions, vouchers, and multi-channel notifications. Built with strict layered architecture across public API, CMS backoffice, background jobs, and webhook handlers.
Architected a modular NestJS monolith serving 10k+ concurrent users with zero downtime during peak sales — backed by Redis caching, OpenSearch, queue-based job processing, and multi-gateway payment handling.
Role: Backend Engineer, Technical Lead
Skills & Certifications
Technical Skills
Languages & Frameworks
Databases
Architecture & Systems
DevOps & Tools
Security
Certifications
AWS Certified Cloud Practitioner
Amazon Web Services(AWS)
Get In Touch
Let's build something impactful together. I'm open to full-time roles, freelance projects, and technical collaborations.