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I'm Stefanus, a seasoned IT professional with 8+ years of software development experience, specializing in backend and full-stack systems. I enjoy architecting reliable APIs, scalable data stores, and robust cloud deployments.\n\nMy tech stack spans Golang, Java Spring Boot, WebFlux, and Next.js. I love building practical AI-assisted automation for customer service and business workflows, and I thrive in collaborative environments where quality, maintainability, and performance matter.…I'm Stefanus, a seasoned IT professional with 8+ years of software development experience, specializing in backend and full-stack systems. I enjoy architecting reliable APIs, scalable data stores, and robust cloud deployments.\n\nMy tech stack spans Golang, Java Spring Boot, WebFlux, and Next.js. I love building practical AI-assisted automation for customer service and business workflows, and I thrive in collaborative environments where quality, maintainability, and performance matter.

Stefanus Hermansyah

Full Stack Developer, Back-End Developer, Web Developer, +2

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I'm Stefanus, a seasoned IT professional with 8+ years of software development experience, specializing in backend and full-stack systems. I enjoy architecting reliable APIs, scalable data stores, and robust cloud deployments.\n\nMy tech stack spans Golang, Java Spring Boot, WebFlux, and Next.js. I love building practical AI-assisted automation for customer service and business workflows, and I thrive in collaborative environments where quality, maintainability, and performance matter.…I'm Stefanus, a seasoned IT professional with 8+ years of software development experience, specializing in backend and full-stack systems. I enjoy architecting reliable APIs, scalable data stores, and robust cloud deployments.\n\nMy tech stack spans Golang, Java Spring Boot, WebFlux, and Next.js. I love building practical AI-assisted automation for customer service and business workflows, and I thrive in collaborative environments where quality, maintainability, and performance matter.

Available to hire

I’m Stefanus, a seasoned IT professional with 8+ years of software development experience, specializing in backend and full-stack systems. I enjoy architecting reliable APIs, scalable data stores, and robust cloud deployments.\n\nMy tech stack spans Golang, Java Spring Boot, WebFlux, and Next.js. I love building practical AI-assisted automation for customer service and business workflows, and I thrive in collaborative environments where quality, maintainability, and performance matter.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Advanced

Indonesian

Advanced

Work Experience

Lead Software Engineer at Infini Soft Technology DMCC

November 1, 2022 - Present

Lead define API specs and payment flow; develop endpoints with Spring Reactive; manage PostgreSQL via ReactiveJpaRepository; use MongoDB with ReactiveMongoRepository; leverage Kafka for transactional messaging; implement MongoDB aggregations; enable Redis caching; develop backoffice panel with React; automate deployments with Jenkins and Docker to AWS for SIT/UAT; production deployments require manual Rancher Helm updates; contributed to Go-based core project for payment gateway, using goroutines for complex logic; built an AI Bot to assist customer service and automation pilots.

Lead Software Engineer at PT. Prismalink International

September 1, 2021 - October 31, 2022

Led API spec and flow; developed REST API microservices for customers using Java Spring Boot; built merchant backoffice UI with React; maintained PostgreSQL with Hibernate and Spring JPA; authored unit tests and ensured data integrity; REST APIs following SNAP standard from BI; CI/CD with Git and Docker Swarm on CentOS; addressed customer issues on CentOS servers; implemented Redis cache with Spring Boot.

Senior Java Engineer at PT. FISCLOUDS INNOVATIONS

July 1, 2020 - August 31, 2021

Consultant implementing Java Spring Boot for transaction data; developed REST API microservices; database migrations with Liquibase; built backoffice panel using React; Dockerization and CI/CD with Jenkins; unit testing with JUnit; SonarQube for quality checks; deployment to Google Cloud Platform; implemented Redis cache with Spring Boot.

IT Java Developer at PT. 3DAYA ASIRA

July 1, 2018 - June 30, 2020

Developed applications from scratch with Spring Boot REST APIs for data transactions; built backoffice panel with React JS; migrations with Flyway; PostgreSQL with Hibernate and Spring JPA; deployed on Windows Server; AML modules using Struts (monolith) with UI in JSP/JQuery; maintained SQL Server databases.

Java Developer at PT. 3DOLPHIN INMOTION

January 1, 2018 - June 30, 2018

Developed chatbot-related features: added schema and flow for interactions; created API endpoints for chatbot interactions and data handling; managed carousel text responses; integrated transaction data via Java Spring Boot APIs to partners and provided customer responses.