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

Detective Benno

AI-powered code review assistant with multi-LLM support (OpenAI, Anthropic Claude). Analyzes GitHub PRs, provides actionable feedback, and integrates with GitHub API.

Python Anthropic Claude OpenAI GitHub API LLM

Lexicon

Full-featured Blog/CMS with .NET 8 Clean Architecture backend and Next.js frontend. OWASP security hardened with input validation, XSS prevention, and SQL injection protection.

.NET 8 Next.js PostgreSQL Clean Architecture Docker

Percival (PMO)

Full-stack PMO application with reports, calendar view, notifications, file attachments, and time tracking. Built with modern stack.

Next.js TypeScript Rust (Axum) PostgreSQL Docker

GCP DevOps Infrastructure

Production-ready GCP infrastructure using Terraform. GKE with Istio service mesh, Cert-Manager for TLS, Velero backups, ArgoCD GitOps, and Prometheus + Grafana observability.

Terraform GKE Istio ArgoCD Velero

Auth Service

Authentication microservice with JWT, Google/GitHub OAuth2, TOTP 2FA with backup codes, RBAC, audit logging, and account lockout protection.

Rust Actix-web PostgreSQL Redis OAuth2

URL Shortener

High-performance URL shortening service with API key management, UTM builder, GeoIP analytics, and QR code generation. Throughput: 10,000+ req/s.

Go PostgreSQL Redis GeoIP Docker

API Gateway

Production-ready API Gateway with circuit breaker, retry logic, Prometheus metrics, rate limiting, and admin authentication.

Go Redis Prometheus Circuit Breaker Docker

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

DEX Aggregator

DEX Price Aggregator API that fetches real-time prices from multiple decentralized exchanges. Supports Uniswap, SushiSwap, and more.

GoWeb3DeFi

Chain Indexer

Blockchain event indexer for ERC-20 and ERC-721 tokens. Indexes transfer events, token metadata, and holder balances in real-time.

GoEthereumPostgreSQL

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.

Bug Fix Go

Contribution: Fix HTML heading ID generation (PR #36233)

Gitea

45k+

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

Feature Go

Contribution: Support closing keywords with URL references (PR #36221)

Gitea

45k+

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

Refactor Go

Contribution: Refactor SearchIssues helper functions (PR #36158)

TiFlow

420+

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

Bug Fix Go

Contribution: Refine dmctl secret key error message (PR #12476)

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!

[email protected]

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.

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