Welcome to my GitHub profile! With over 20 years of experience in software engineering, I specialize in designing and developing scalable, secure, and efficient financial systems. I am passionate about using technology to solve complex challenges, particularly in the banking and financial services industry.
- Current Role: Middleware & Architecture Dept Head at one of the Bank, Jakarta, Indonesia.
- Specializations:
- Core Banking Software Engineering.
- Middleware Development.
- Microservices Architecture.
- Digital Banking Platform Integration.
- Loan / Lending Platform Solutions.
- Freelance/Consulting:
- Middleware ISO 8583 Consultant.
- Past Projects:
- Migration of Core Systems to Microservices.
- Optimizing high-volume transaction systems with low latency.
- Voluntary Development of Elderly Health Program systems.
- Java (Spring Boot, Microservices)
- Golang
- Frontend: React.js, Typescript, TailWindCSS
- AWS
- GCP
- OAuth2 Authentication
- API Development with JSON, ISO 8583, ISO 20022
- Kubernetes & Docker
- Kafka, RabbitMQ
- JPA, PostgreSQL, MongoDB, Redis
- Maven (Preferred Build Tool)
- Developed middleware to handle inbound JSON and outbound ISO 8583/20022 data.
- Focused on scalable, secure architecture for high transaction volumes.
- Solved race conditions in asynchronous processing using Redis distributed locks.
- Designed loan installment features with fixed monthly payment dates.
- Integrated with third-party APIs for credit scoring.
- Built OAuth2-secured services for real-time balance and transaction management.
- Integrated payment gateways like VISA and Mastercard.
- Led migration from monolithic to microservices architecture, improving scalability and fault tolerance.
- Tuned Kubernetes deployments for better resource management and auto-scaling capabilities.
- Building robust financial systems.
- Exploring blockchain and DApp development (recently advised on a blockchain gaming project).
- Delivering workshops and mentoring the next generation of software engineers.
- AWS Certified Solution Architect - Associate (AWS ID: AWS01995091).
- Microsoft Certified Solution Developer (MCSD) – App Builder.
- Microsoft Certified Solution Associate (MCSA) – Web Application.
- Microsoft Specialist – Programming in HTML5 with JavaScript and CSS3.
- LinkedIn: Slamet Widodo
- GitHub: github.com/pauluswi
Feel free to explore my repositories to see how I’m leveraging Java, Golang, and microservices for financial solutions. Let’s collaborate on meaningful projects!