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Alvian Herman Putera Mangalik

@viaann

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Software Engineer | Crafting Scalable Backend Services | Speak Java, Golang and Rust

Indonesia

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What I'm looking for

I’m seeking a remote backend engineering role where I can build scalable, high-performance systems using Go, Java, and modern tech stacks. I value working with global teams, solving complex challenges, and delivering impactful solutions. I’m motivated by environments that encourage continuous learning, clean architecture, and ownership of end-to-end features.

I am a passionate Back End Developer with over five years of experience building scalable, high-performance applications using Java, Golang, and Rust. I focus on designing resilient APIs, managing databases, and engineering efficient system architectures that improve user experience.

I have a proven track record modernizing legacy systems, consolidating services, and optimizing performance — including upgrading services to Java 21 for major memory and CPU gains. I consistently deliver high test coverage and reduction in production errors through TDD and strong engineering practices.

I have worked across fintech, e-commerce, and enterprise banking products, integrating payment providers, implementing event-driven microservices, and leveraging cloud platforms like Google Cloud and AWS. I collaborate effectively in Agile teams and prioritize maintainability, observability, and operational stability.

I am driven by solving complex challenges and creating impactful solutions that scale; I enjoy mentoring through code reviews, improving release confidence, and contributing to cross-functional delivery of customer-facing systems.

Experience

Work history, roles, and key accomplishments

Current

Backend Developer

Current

CIMB Niaga

Jun 2024 - Present (1 year 3 months)

(Outsourced through Asian Sigma Technology)
Delivered robust Java microservices with 90%+ test coverage, ensuring reliability and smooth releases. Built scalable solutions for OCTO Clicks & OCTO Mobile, consolidated multiple services into one platform, and upgraded to Java 21 with optimized Spring Boot for 2× memory efficiency and 50% lower CPU usage.

Java Spring Boot Microservices Unit Testing Performance Tuning Redis Kafka API Design Cloud)

Backend Developer

Hand Global Solutions

Nov 2023 - Jun 2024 (7 months)

Maintained user, payment, and promotion modules for high-traffic e-commerce apps, resolved production performance and transaction issues, and monitored system health with Grafana to minimize downtime.

Backend Development Payments Performance Tuning Monitoring Grafana Troubleshooting REST APIs

Backend Developer

Alto Network

Jul 2022 - Nov 2023 (1 year 4 months)

Engineered backend systems for Virtual Account, Disbursement, and Open Banking handling 1k+ transactions/day, integrated third-party payment providers, and implemented Redis caching and Kafka to reduce latency.

Java Golang Redis Kafka Microservices Junit Mockito

Backend Developer

Nexsoft

Jun 2020 - Jul 2022 (2 years 1 month)

Developed and maintained scalable backend systems and RESTful APIs for a marketplace, implemented event-driven microservices with ElasticSearch and MySQL, and produced technical documentation to streamline team collaboration.

Java Spring Boot REST APIs Microservices Event Driven Architecture Elasticsearch MySQL CI CD

Education

Degrees, certifications, and relevant coursework

BINUS University

Bachelor of Engineering, Computer Science

2024 -

Pursuing a Bachelor of Engineering in Computer Science with coursework in algorithms, software engineering, AI, databases, and cybersecurity.

SMK Telkom Jakarta

High School Diploma, Computer Science

2017 - 2020

Activities and societies: Vice President, IT Club (2018–2020); Google Developer Kejar (Dicoding); Finalist: Junior Competitive Programming Contest (UGM), Innovative Informatics Contest (Atma Jaya), SQL Contest (Tarumanagara); Completed Java Fundamentals (Oracle) and IoT (Arduino) coursework.

Completed a High School Diploma majoring in Computer Science with coursework in data structures, OOP, web and mobile development; held Vice President of the IT Club.

G2 Academy

Bootcamp Certificate, Full Stack Development

2020 - 2020

Activities and societies: Projects: Distribution Tracking System (Spring + React + OpenStreetMap), E-commerce backend (Java Spring Boot & MySQL).

Completed a Full Stack Developer bootcamp covering Java, Spring Boot, React, Node.js, and related full-stack projects including a distribution tracking system and e-commerce backend.