Open to opportunities

Kiệt User

@kituser

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Backend-focused software engineer building scalable APIs and mobile apps.

Vietnam

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What I'm looking for

I want a backend engineer role focusing on scalable APIs, cloud deployments, collaborative teams, production impact, and opportunities to grow technical responsibility.

I am a software engineering student with hands-on experience building backend systems, mobile apps, and production-ready projects using technologies such as Next.js, Elysia.js, Nest.js, and AWS. I focus on writing clean code, optimizing databases, and deploying scalable services.

In internships and freelance work I contributed to mobile apps with Flutter and Android, developed backend APIs, and delivered high-performance tooling like an EXIF-aware batch image processor and a Discord TTS bot verified across thousands of servers. My projects include a commercial-grade manga platform, an Android reader published on Google Play, and real-time chat using WebSocket.

I seek to grow as a backend engineer, contribute to production systems, and bring reliable, well-architected APIs and cloud deployments to teams. I emphasize pragmatic engineering, collaboration, and continuous learning.

Experience

Work history, roles, and key accomplishments

Current

Freelance Developer

Current

Freelancing

Oct 2024 - Present (1 year 8 months)

Delivered client websites and high-performance tooling including an image overlay batch processor with EXIF-aware scaling and multi-format support using Sharp.js.

JavaScript HTML CSS Responsive Design Image Processing EXIF SharpJS

Current

Backend Engineer

Current

University Projects

Oct 2022 - Present (3 years 8 months)

Built commercial-grade backend systems and Android apps for multiple projects, architecting RESTful APIs, JWT authentication, and premium subscription payment integrations.

Next.js MongoDB JWT AWS Payment Integration Kotlin Jetpack Compose ElysiaJS

Mobile Development Intern

VNPT

Aug 2025 - Oct 2025 (2 months)

Completed a 2-month internship contributing to Flutter and Android apps and backend APIs, improving mobile UI/UX patterns and enterprise development practices.

Flutter Android Kotlin RESTful APIs Team Collaboration Backend Technical Communication

Discord Bot Developer

Independent Project

Jan 2021 - Dec 2021 (11 months)

Developed a Discord TTS bot that achieved official verification and 3,500+ active servers, implementing real-time audio streaming, Redis caching, and high-availability AWS deployment.

FFMPEG Redis AWS EC2 Scalability

Education

Degrees, certifications, and relevant coursework

Posts and Telecommunications Institute of Technology

Bachelor of Software Engineering, Software Engineering

2022 -

Grade: 3.66

Activities and societies: Built multiple production-grade projects (Himmel, Tsukinari, The Booker), participated in internships and freelance development, received PTIT merit scholarship (30% tuition reduction) for 2024–2025.

Pursuing a Bachelor of Software Engineering with coursework and projects focused on backend systems, mobile apps, and cloud deployments; maintained a 3.66 GPA and received a merit scholarship for 2024–2025.