Open to opportunities

John Angelo User

@johnangelouser

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Senior software engineer specializing in scalable backend systems, real-time platforms, and cloud-native architectures.

Philippines

Message

What I'm looking for

I seek technical leadership roles building scalable, real-time, cloud-native platforms where I can mentor teams, integrate AI/ML, and drive measurable system improvements.

I am a Senior Software Engineer with over 12 years building full-stack, cloud-based, high-performance platforms for financial institutions, enterprise clients, and e-commerce. I lead teams, design scalable microservices with Java and Spring Boot, integrate event streaming with Apache Kafka, and deliver AI-driven, real-time features that improved fraud detection and system performance.

I mentor junior engineers and collaborate closely with AI/ML teams to integrate models into production, optimize CI/CD pipelines, and enhance frontend experiences with React and Next.js. My work has driven measurable improvements (faster risk assessment, reduced processing times, higher user engagement) and supported award-recognized platforms.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Oscilar

Feb 2023 - Present (2 years 11 months)

Led a team of 3 to develop Oscilar's AI Risk Decisioning Platform for real-time fraud detection, improving risk assessment speed by 25% and reducing processing times by 40% through Kafka-based event streaming.

Java Spring Boot Apache Kafka Microservices RESTful APIs React Next.js CI CD AWS

Full Stack Developer

Docker

Apr 2020 - Dec 2022 (2 years 8 months)

Contributed to Docker Hub by building React (TypeScript) frontends and Python backend services to manage repositories, metadata, auth, and async processing, improving platform scalability and automation.

React TypeScript Python Django Flask Docker Kubernetes PostgreSQL Redis

Mid-level Developer

Octopus Deploy

Feb 2018 - Feb 2020 (2 years)

Developed deployment dashboards, multi-tenancy, and audit logging using Java and Vue.js, improving deployment troubleshooting and compliance support for enterprise clients.

Java Vue.Js Audit Logs CI CD Jenkins AWS Docker

Full Stack Developer

White Cloak Technologies

Dec 2015 - Nov 2017 (1 year 11 months)

Worked on UnionBank's mobile banking app using React.js and Spring Boot, enhancing core banking features and integrating real-time transaction monitoring and QR payments.

React Spring Boot Java Monitoring RESTful APIs & Security PostgreSQL

Web Developer

Startechup Inc.

Dec 2013 - Oct 2015 (1 year 10 months)

Developed an e-commerce SPA using Django and Angular, implementing secure payment integration, order processing, and real-time updates to improve user experience and operations.