FULL STACK
ENGINEER

Evrwell

Freelance Project Manager & AI Engineer

Preventive healthcare platform integrating wearable data, AI health analysis, and a marketplace.

• Integrated Gemini for nutrition recognition, medical document extraction, and personalized health insights from wearable, nutrition, and checkup data.
• Reduced extraction inference costs by 65% and response time from 12 to 2–3 seconds by evaluating a lighter model; retained complete extraction coverage on evaluated documents.
• Negotiated subscription pricing and scope; modeled AI inference costs at 37% of subscription revenue under full quota usage.
• Led a six-person team across Evrwell and Medizen; launched a healthcare marketplace and onboarded three merchants.

Medizen

Freelance Software Engineer

Genetic testing platform partnered with Medizen Humancare, South Korea.

• Developed testing, checkout, sample tracking, and laboratory report workflows for 1,500+ registered users using SvelteKit, Go, PostgreSQL, and RabbitMQ.
• Implemented checkout idempotency to prevent duplicate processing during repeated submissions and retries.
• Automated frontend regression testing with Playwright, reducing validation time by 88%, from 40 to 5 minutes.
• Established a GitHub Actions and Docker CI/CD pipeline with regression checks and automatic rollback, reducing deployment time from 25 to 6–8 minutes.

Foldin

Freelance Software Engineer

Social platform for free and paid in-person events.

• Migrated the backend from NestJS to Go (Echo), reducing staging API response times by approximately 85%, from 35 ms to 5 ms, while lowering resource usage.
• Implemented subscriptions, payments, community, and geolocation features serving 720+ users; built an admin dashboard for five staff managing 1,100+ user-created events.

Universitas Jenderal Soedirman

Bachelor of Computer Science

• GPA 3.93/4.00
• Thesis: Preprocessing strategies and data leakage risk in machine learning.

XHARP

Co-founder & Full Stack Engineer

• Co-founded a software development company and delivered nine client projects on schedule, from scoping through release.
• Handled frontend, backend, DevOps, and quality assurance across Evrwell, Medizen, and Foldin.

Universitas Amikom Purwokerto

Full Stack Developer Intern

• Developed a computer inventory and damage tracking application using CodeIgniter, PHP, and MySQL for 200+ computers serving 2,000+ students.
• Replaced paper, whiteboard, and Google Forms workflows with centralized records and repair reports, reducing manual workflow steps by 70%.

Sakola Kembara

Full Stack Developer Intern

• Created Vue interfaces for 5+ assessment types used by approximately 20 teachers; automated grading for hundreds of students with immediate results.
• Connected backend services through typed gRPC contracts.

Speakable Youth

Head of IT Support

• Led a team of 2 supporting a Discord community of 1,000+ members and technical delivery of roughly 48 learning sessions over four months.

Languages & Frameworks

TypeScript, Go, Python, SvelteKit, Next.js, React, Node.js, Flutter

Infrastructure & Tools

PostgreSQL, RabbitMQ, Docker, GitHub Actions, Playwright, Sentry, Grafana

Coursework

Google Advanced Data Analytics (2024): Python, statistics, regression analysis

Interests

Financial Markets, Science, History, Technology

BINTANG YOSUA

Full Stack Engineer and Computer Science graduate with 2 years of experience delivering healthcare, education, and community platforms. Shipped nine client projects and led a six-person team. Specializes in Go, TypeScript, SvelteKit, Next.js, PostgreSQL, and AI integration.