Felix Marsaptandhiyo

About Me

Passionate backend developer with experience in Golang microservices, system observability, and high-performance computing. Specialized in authentication systems, scalable architecture, and backend performance.

Experience

Kredit Plus – Backend Developer

Aug 2025 – Present

Integrated a new Face Compare eKYC vendor, replacing the less effective previous vendor and improving identity verification reliability.
Resolved a critical issue in Worker Service that had been unsolved for ~1 month and impacted ~17,000 data records, restoring system reliability and data consistency.
Upgraded dependencies and maintained the eKYC service that had not been updated for ~8 months, improving maintainability and reducing technical debt.
Built a backtest system for Face Compare eKYC vendor evaluation using Python (pandas), validating vendor performance against predefined requirements and prepared datasets.

PrivyID – Software Engineer (Intermediate)

Sep 2022 – Jun 2025

Handled ~3,000 daily registrations, reduced downtime by 90%.
Developed Merchant Dashboard & RBAC for B2B integration.
Implemented modular 2FA (OTP, Face Verification, Biometric, PIN).
Integrated OCR and Datadog alerting for observability.

PrivyID – Software Engineer (Internship)

Jul 2022 – Sep 2022

Developed CRUD endpoints and optimized backend logic for high-traffic applications.
Performed API testing with Postman and implemented end-to-end testing using Cypress.
Built mock APIs to simulate real-world data for testing purposes.
Improved debugging using Google Developer Tools and enhanced performance.
Collaborated in an agile environment and strengthened Go programming skills.

Technical Skills

🐹 Golang 🐘 PostgreSQL 🐬 MySQL 🔗 gRPC 📊 Datadog 🧠 Redis 🔥 Firestore ☁️ Google Cloud Storage 📮 Postman API 💎 Ruby on Rails 🐳 Docker 🧩 Microservices ⚙️ API Development 📈 Datadog 🗂️ Jira 🧠 Notion