Nathanael Fredericko

I'm a passionate full-stack web developer with five years building scalable, user-focused applications. Since 2024 I have shifted my focus to blockchain development, specializing in smart contracts and decentralized technologies.

At PT. Indocement Tunggal Prakarsa, I developed and maintained ERP modules used by over 5,000 users, cutting manual processing time by 40%. I designed an OAuth 2.0–compliant API for banking integration that enabled secure real-time payments and cut reconciliation time by 60%.

I played a key role in the MIRO project replacing a 15+ year legacy production system and built internal APIs (including a Splunk alert handler) that improved monitoring and response time by 80%. I bring hands-on experience building reliable integrations and improving system stability at scale.

At PT. Online Biz Indonesia I reviewed and debugged legacy and new codebases to improve system stability, reducing bug-related incidents by 30%. I developed 100+ unit tests to support CI/CD pipelines, contributing to a 40% reduction in post-deployment bugs and helped deliver 5+ internal projects through stakeholder-aligned requirements work.

I hold a Bachelor of Computer and Informatics Sciences (GPA 3.89) and certifications including Certified Solidity Developer (Blockchain Council) and Ethereum Virtual Machine Chain (Alchemy University), plus NVIDIA courses in deep learning and data science workflows. I aim to build secure, efficient, future-ready applications and bring full-stack and blockchain expertise to collaborative teams.