Reinaldi Mohamad Yusup
Senior Software Engineer
Senior Software Engineer with 10+ years of experience building high-performance distributed systems across fintech, healthcare, and e-commerce. Experienced in Go and Ruby on Rails, with a strong background in microservices architecture, event-driven systems using Kafka, and cloud infrastructure on AWS and GCP. Proven track record of rapid delivery, technical leadership, and ISO 27001 compliance in regulated environments. Proficient with observability tools including Prometheus and Grafana, and actively integrates AI-assisted engineering workflows using Anthropic SDK, Claude Code, and Cursor.
Experience
Zero Gravity
Mar 2025 – Present
Senior Full Stack Engineer · United Kingdom (Remote)
- Built an application tracking system using Rails + Hotwire, enabling students to track university and job applications — increased active product usage by 70%
- Integrated AI-powered video transcript generation with Hotwire for enhanced streaming accessibility and content discoverability
- Designed and implemented a CV generator and download feature, enabling users to create and export tailored CVs directly from the platform
- Improved job recommendation accuracy by 80% by refining matching logic and leveraging behavioral data
- Enhanced mentor recommendation system, increasing relevance and engagement between mentors and students
- Integrated Google SSO, Microsoft SSO, and Apple SSO, simplifying authentication and reducing login friction
- Implemented AI Wingman feature to generate contextual suggestions and guidance across the platform
Biomark
May 2021 – Feb 2025
Backend Engineer, promoted to Technical Lead · Singapore (Remote)
- Delivered a production-grade patient data and lab management system in 9 days — ahead of deadline — covering planning, development, deployment, and testing
- Led backend development for healthcare systems handling patient data, lab results, and hospital integrations with high reliability and security
- Promoted to Technical Lead, managing a cross-functional team (backend, frontend, QA) to deliver doctor portals, lab dashboards, and integration services
- Led migration from Ruby on Rails monolith to NestJS microservices (order-fs, security-fs, institution-fs), unifying DP and LP platforms into a single service with Kafka-based event streaming
- Restructured API endpoints, reducing response times by 200ms+ across critical paths
- Implemented Elasticsearch, reducing search latency from ~5 seconds to <1 second
- Introduced AI-driven patient recommendations, increasing user engagement by 25%
- Reduced AWS infrastructure costs by 30% through optimization and zero-downtime deployment strategies
Gardeneur
Sep 2020 – Apr 2021
Backend Software Engineer · San Jose, CA (Remote)
- Led migration from monolith to microservices, improving system performance by 40%
- Implemented Elasticsearch, cutting search response times by 50%
- Built Stripe-based payment flows, reducing checkout time by 30%
- Optimized inventory, order, and shipping workflows, contributing to a 10% revenue increase
Forstok.com
Mar 2018 – Aug 2020
Senior Software Engineer · Jakarta
- Improved backend query performance by 50%, significantly enhancing response times across the platform
- Built an Excel-based data synchronization tool, saving 30 hours/month of manual operations
- Migrated the platform from monolith to microservices for improved scalability and resilience
- Integrated Shopee, Tokopedia, Lazada, and Bukalapak APIs to automate multi-channel product listings
Jualo.com
Sep 2016 – Feb 2018
Full Stack Developer · Jakarta
- Developed re-commerce features and resolved critical bugs, improving user engagement
- Built payment and data collection microservices to improve modularity and scalability
- Migrated search to Elasticsearch, reducing response times by 50%
Karir.com
Nov 2015 – Aug 2016
Rails Developer · Jakarta
- Built and maintained a job portal serving 5,000+ daily active users
- Optimized database queries, significantly reducing page load times
- Managed cloud infrastructure with AWS and Terraform for scalable deployments
Tri Saudara Sentosa Industry
Apr 2015 – Oct 2015
Rails Developer · Bekasi
- Collaborated with stakeholders to translate business requirements into an internal ERP system
Arthajina Mandala Nusantara
May 2014 – Mar 2015
.NET Developer · Bandung
- Built .NET-based business automation systems, reducing manual processes
- Improved ERP system reliability, reducing operational errors by 20% through automated validation
Personal Projects
Family Protector
Apr 2026
Android App · Kotlin, Jetpack Compose, Firebase
- Built a parent-child family safety Android app with remote device lock, screen time monitoring, and real-time messaging using Jetpack Compose and Material3
- Implemented Clean Architecture (data/domain/ui layers) with Hilt dependency injection and coroutines for reactive state management
- Integrated Firebase Authentication, Cloud Firestore, Cloud Storage, and FCM for realtime sync and push notifications across paired devices
- Developed Device Admin integration with foreground service to monitor usage stats and execute remote commands via Firestore listeners
- Shipped signed release AAB to Google Play with Firestore security rules enforcing parent-child data isolation