Hi, my name is

Gregorius Bima Kharisma Wicaksana

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Building scalable systems that handle 100K+ users. 6+ years crafting enterprise-grade software specializing in Golang, .NET Core, and cloud-native architecture. Currently leading a 20-member technical division at Indomaret Group.

Jakarta, Indonesia

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About Me

A brief introduction about who I am and what I do

I'm a Technical Lead at PT. Indomarco Prismatama (Indomaret Group) with a passion for building scalable, maintainable systems. Currently leading a 20-member technical division across 4 specialized units: Business Process Recruitment, Time Management, IRK (Flutter mobile app), and Course Development.

I specialize in Golang (Fiber), .NET Core, Laravel, and cloud-native architecture. I've architected backend services supporting 100K+ internal users and spearheaded CI/CD automation that cut deployment time by 40%.

I standardized Domain-Driven Design (DDD) and Hexagonal Architecture practices, and introduced AI-driven workflows to boost team autonomy and development velocity.

Years Experience

100K+

Users Supported

20+

Team Members Led

40%

Deployment Time Cut

about.json

{
  "name": "Gregorius Bima Kharisma Wicaksana",
  "role": "Technical Lead",
  "company": "PT. Indomarco Prismatama",
  "location": "Jakarta, Indonesia",
  "experience": "6+ years",
  "focus": [
    "Golang (Fiber)",
    ".NET Core",
    "Cloud Infrastructure",
    "Team Leadership"
  ],
  "available_for": "Freelance & Consulting"
}

Skills & Expertise

Technologies and tools I work with

💻

Languages

Go 95%

Rust 75%

TypeScript 90%

Python 85%

Java 80%

C#/.NET 80%

PHP 85%

C++ 70%

☁️

Infrastructure

AWS 90%

GCP 85%

Kubernetes 90%

Docker 95%

Terraform 85%

Linux 95%

Nginx 90%

CI/CD 90%

🗄️

Databases

PostgreSQL 90%

MongoDB 85%

Redis 90%

MySQL 85%

Elasticsearch 75%

🏗️

Architecture

Microservices 95%

System Design 90%

API Design 95%

Event-Driven 85%

Clean Architecture 90%

Also experienced with

gRPCGraphQLRabbitMQKafkaWebSocketOAuth2JWTGitArgoCDPrometheusGrafanaSecurityNetworkingDartKotlin

Featured Projects

Some of my recent work that I'm proud of

Percival (PMO)

Full-stack PMO application for project tracking. Features project/task management, team & resource allocation, dashboard analytics, and authentication system.

Next.js TypeScript Rust (Axum) PostgreSQL Docker

GCP DevOps Infrastructure

Production-ready GCP infrastructure using Terraform. GKE cluster with autoscaling, Cloud SQL, Cloud Build CI/CD, ArgoCD for GitOps, and Prometheus + Grafana monitoring.

Terraform GKE Cloud SQL ArgoCD Prometheus

Auth Service

Authentication microservice with JWT, Google OAuth2, Two-Factor Authentication (TOTP) with backup codes, and RBAC.

Rust Actix-web PostgreSQL Redis JWT

URL Shortener

High-performance URL shortening service with analytics and QR code generation. Throughput: 10,000+ req/s.

Go PostgreSQL Redis Clean Architecture Docker

API Gateway

Lightweight API Gateway with rate limiting (token bucket), API key management, health checking, and reverse proxy.

Go Redis Docker Microservices

HR Attendance System

Legacy attendance platform redesigned to microservices. Redis caching improved API response by 60%. Handles 10K+ concurrent users.

Golang (Fiber) Redis PostgreSQL GCP Docker

Other Projects

Warung Madura

E-commerce/POS system for small businesses. Inventory management, sales tracking, and reporting.

GoPostgreSQLE-commerce

View All Projects

Open Source Contributions

Contributing to the open source community and collaborating with developers worldwide

Gitea

45k+

Self-hosted Git service written in Go. A painless, self-hosted Git service.

Feature Go

Contribution: Contributed features and improvements to the codebase

Trivy

24k+

Comprehensive and versatile security scanner for containers, filesystems, and git repositories.

Feature Go

Contribution: Added new security scanning capabilities

TiFlow

420+

Data integration platform for TiDB, supporting both data migration and change data capture.

Feature Go

Contribution: Enhanced data replication features

Karpenter IBM Cloud

Kubernetes node provisioning project for IBM Cloud infrastructure.

Feature Go

Contribution: IBM Cloud provider implementation for Karpenter

Apache Camel-K

870+

Lightweight integration framework built from Apache Camel for Kubernetes.

Bug Fix Go

Contribution: Fixed integration and deployment issues

ORAS

1.5k+

OCI Registry As Storage - Push and pull OCI artifacts to and from OCI registries.

Docs Go

Contribution: Improved documentation and examples

View All Contributions on GitHub

Work Experience

My professional journey in software engineering

Sep 2021 - Present

Technical Lead

PT. Indomarco Prismatama (Indomaret Group)

Leading a 20-member technical division across 4 specialized units: Business Process Recruitment, Time Management, IRK (Flutter mobile app), and Course Development.

▹ Architected Golang (Fiber) backend services supporting 100K+ internal users
▹ Built custom API Gateway using Laravel as Layer 1 security for external API access
▹ Spearheaded CI/CD automation using GitHub Actions and Jenkins, cutting deployment time by 40%
▹ Standardized Domain-Driven Design (DDD) and Hexagonal Architecture across teams
▹ Introduced AI-driven workflows, boosting team autonomy and development velocity

Jul 2020 - Aug 2021

Technical Architect

PT. Indomarco Prismatama (Indomaret Group)

Designed and implemented high-availability systems and scalable infrastructure for enterprise applications.

▹ Led monolith-to-microservices migration using Docker and GCP
▹ Designed scalable API Gateway infrastructure
▹ Implemented Terraform-based IaC to standardize cloud provisioning
▹ Deployed internal apps via IIS and Nginx with hybrid cloud/on-premise setups

Sep 2019 - Jun 2020

Full Stack Developer

PT. Indomarco Prismatama (Indomaret Group)

Built and maintained HR systems and internal applications using various tech stacks.

▹ Developed HR systems using .NET MVC, Laravel, and WCF
▹ Managed SQL Server and PostgreSQL databases for various modules
▹ Maintained version control and collaborated using TortoiseSVN and GitHub

Get In Touch

I'm currently open for freelance projects and consulting opportunities. Whether you have a question or just want to say hi, feel free to reach out!

bimakw20@gmail.com

bima-kharisma-wicaksana

GitHub

bimakw

Let's Work Together

Looking for a Technical Lead, Backend Architect, or Cloud Consultant? I'm available for interesting projects and collaborations.

Say Hello