Robby Ulung Pambudi
Software Engineer | CEO, QueryFlow
Software Engineer with 4+ years of experience building scalable backend, AI-driven, and cloud-native applications. CEO of QueryFlow—an AI startup building Mantra for exams, assessment, events, and analytics. Experienced in RAG systems, LLM-powered applications, and distributed architectures—delivering production systems serving over 250,000 users in SPMB Jatim 2024–2025.
Experience
Founder & CEO of QueryFlow, an AI startup that turns operational problems into digital solutions. Building Mantra—a product for exams, assessment, events, and analytics.
Fullstack Engineer
Designed and implemented a scalable multi-tenant architecture supporting 10+ tenants with isolated data and configuration. Optimized multi-tenant queries and data access patterns, reducing response time by up to 40% and improving system reliability.
Fullstack Developer (Internship)
Presented technical solutions and project progress to clients, ensuring clear communication and alignment with business requirements. Refactored over 20 legacy modules, improving maintainability and reducing technical debt.
Fullstack Developer
Optimized frontend query performance, improving loading and interaction times by 60% across student and administrative portals. Led development of enrollment, re-enrollment, and score reporting for a system used by over 250k students across East Java.
Frontend Developer (Intern)
Designed DRM-based protection against illegal downloading and screen sharing, resulting in an 80% reduction in piracy across tests on 8 browsers.
Frontend Developer (Freelance)
Developed core features for Spectra, a web platform supporting PLN internal operations. Implemented 13 of 30+ key pages including ULP, UP3, Employee, and Parent dashboards with responsive, maintainable UI.
Frontend Developer (Freelance)
Built a scalable HOC for RBAC in a medical app with dynamic route protection using a role-permission matrix (5 roles, 20+ rules).
Education
Master of Informatics
- Professor's Research Assistant – Distributed Systems
- Teaching Assistant for Microservices and Application Development
Bachelor of Informatics — GPA 3.61
- Teaching Assistant: Data Structures, Fundamental Programming, and Operating Systems
- Finalist of SSG x Hackfest 2024 (Ciputra University)
Projects
RAGForge
Feb 2025 – Jul 2025
DiLLeMA
Feb 2025 – Jul 2025
Sorting Algorithm Visualization
Feb 2022 – Mar 2022
Frequently asked questions
What roles are you targeting?
Software engineering roles spanning backend, fullstack, and AI/LLM systems—especially teams shipping production RAG, distributed inference, or high-traffic platforms. I also lead as CEO of QueryFlow (queryflow.id), and bring 4+ years of delivery experience including SPMB Jatim at 250k+ users.
What is your AI / LLM depth?
I build RAG systems with LangChain and ChromaDB (RAGForge) and distributed LLM inference with Ray and vLLM (DiLLeMA, published in SoftwareX). I care about production readiness: Docker, dependency injection, and measurable throughput.
How do you prove you can scale?
At SPMB Jawa Timur I improved frontend query loading and interaction times by 60% and owned enrollment features for 250k+ students. At Techflouu I cut multi-tenant response time by up to 40% across 10+ tenants.
What about your academic foundation?
Bachelor of Informatics at ITS (GPA 3.61) and Master of Informatics ongoing. I am a research assistant in distributed systems, a teaching assistant for microservices, and an author on SoftwareX and IEEE ONCON publications.
Publications
View allDiLLeMa: An extensible and scalable framework for distributed large language models (LLMs) inference on multi-GPU clusters
DOI: 10.1016/j.softx.2026.102537
A Novel Approach to Image Steganography Using Pixel Differencing for Better Data Hiding
DOI: 10.1109/ONCON62778.2024.10931677
Get in touch
Open to software engineering roles and collaborations—backend, AI/LLM, and cloud-native work. Also building QueryFlow (queryflow.id). Based in Surabaya, Indonesia.