Toni Tegar Sahidi
(Sam Toni)

Principal-level Software Engineer & IT Consultant

📧 tonitegarsahidi@gmail.com 📞 +62-852-0173-8000 🔗 LinkedIn 📍 Malang, Indonesia

19+ years of experience designing, modernizing, and evolving large-scale systems across enterprise, startup, and government environments. Specialized in robust backend architectures and scalable full-stack applications using Golang, Laravel, Java Spring Boot, and TypeScript/JavaScript (Next.js, Astro.js). Known for leading architectural direction, stabilizing high-risk production systems, and driving cross-team engineering decisions that significantly improve reliability, scalability, and performance.

Proven impact includes reducing production errors by ~99%, improving API latency by ~30%, and modernizing legacy monolithic systems into resilient service-oriented architectures.

Sam Toni

💪 Core Strengths

  • System Architecture & Distributed Systems Design
  • Cross-Team Technical Leadership (without formal authority)
  • Production Reliability & Incident Recovery
  • Performance Optimization at Scale
  • Backend & Full Stack System Thinking
  • Engineering Mentorship & Technical Standards
  • Trade-off Analysis & Decision Making

🛠️ Technical Expertise

Architecture & Systems

Distributed Systems & SOA RESTful API Design Caching Strategy & Performance Observability (ELK, Structured Logging) UI/UX Prototyping (Figma)

Languages & Frameworks

Golang Laravel (PHP) Java Spring Boot Node.js TypeScript (React, Next.js, Astro.js)

Databases, Infrastructure & Tools

PostgreSQL MySQL Redis Docker CI/CD AWS & GCP

🎓 Education & Certifications

S.Kom. Ilmu Komputer

Universitas Brawijaya Malang, Indonesia (2005–2012)

Selected Certifications

  • Google Data Analytics Professional Certificate
  • Google Project Management Professional Certificate
  • Cisco CyberOps Associate
  • AI for Managers (Microsoft & LinkedIn)
  • Google Associate Cloud Engineer (Kominfo DTS)
  • Web Security & Bug Bounty (Zero To Mastery)

🚀 Work Experience

Senior Software Engineer

PT Nuon Digital Indonesia (Telkom Group)

Oct 2022 – Present
  • Led a system-wide backend audit and stabilization initiative across legacy services, reducing production error rates from ~3,000/day to ~30/day (~99% reduction).
  • Spearheaded API performance optimization by redesigning critical endpoints and introducing Redis caching layers, improving response latency by ~30%.
  • Architected and deployed NBP Gateway in Golang, a centralized integration layer handling hundreds of thousands of monthly requests with consistent high availability.
  • Resolved a critical production security incident by identifying a compromised third-party JavaScript dependency affecting authentication flows.
  • Implemented centralized observability using the ELK Stack and structured logging, drastically reducing incident triage and debugging time (MTTR).
  • Drove technical governance and architectural alignment across 3+ distributed engineering teams (3–8 engineers each), conducting design reviews and mentoring engineers.

Software Engineer & UI/UX Consultant

United Nations Indonesia (UN Volunteers)

Apr 2026 – Jul 2026
  • Modernized legacy workflows by identifying critical usability bottlenecks and designing interactive UI/UX prototypes.
  • Structured an end-to-end legacy data migration strategy with zero data loss.
  • Expanded project scope from UI/UX design to full-stack development: scalable backend services in Golang and modular frontend interfaces in Astro.js.
  • Delivered ~80% of the fully functional system before scheduled handover, with comprehensive architectural documentation for the internal engineering team.

Backend Engineer & Scrum Master

GameQoo Cloud Gaming

Jul 2021 – Oct 2022
  • Led the architectural decomposition of a legacy C# monolithic system into modular backend services with caching strategies, improving maintainability and scalability.
  • Redesigned relational database schemas and standardized core REST API contracts, accelerating cross-team frontend-backend integration.
  • Supported live production operations across deployment, monitoring, and debugging, ensuring high platform availability.
  • Spearheaded structured Scrum adoption across squads (up to 15 engineers in a hybrid setup), increasing sprint delivery predictability and transparency.

Full Stack Engineer / System Owner

CV Ruang Rimbun Indonesia

Mar 2020 – Sep 2021
  • Architected, developed, and deployed SimOPT — a plant pest monitoring and forecasting platform for a government agency across 8 provinces (33 cities) using Laravel, MySQL, and MapBox GIS.
  • Owned end-to-end technical execution: database schema modeling, backend logic, and interactive data visualization (dynamic charts + geospatial mapping).
  • Delivered 5+ custom web applications and institutional systems for SMEs and academic research, managing the full SDLC from requirements to deployment.

Software Engineer & IT Lecturer

STT STIKMA Internasional

2012 – 2018
  • Developed and maintained campus web platforms and the alumni database tracking system, ensuring reliable data centralization.
  • Taught core computer science courses (Algorithms, Data Structures, Mobile & Web Programming in Java/PHP).
  • Mentored student developer teams to national-level IT competition achievements.

Independent Software Engineer

Freelance

2007 – 2020
  • Delivered 20+ custom web and desktop solutions — including a financial and donor management system for a national zakat institution (LAZ) and e-commerce platforms.
  • Engineered domain-specific algorithms: Simplex Method and Evolutionary Algorithms for livestock feed formulation tools, plus Neural Network implementations for academic research.