Muhammad Arifin

Frontend Engineer

Jakarta, Indonesia4 yrs 9 mos experience
Most Likely To SwitchAI ML Practitioner

Key Highlights

  • Expert in building LLM-powered systems and generative AI products.
  • Achieved 350x faster processes in financial automation.
  • Led cross-functional teams to deliver high-performance applications.
Stackforce AI infers this person is a Full-Stack Engineer specializing in Generative AI and high-performance web applications.

Contact

LinkedIn

Skills

Core Skills

Generative AiReact.jsFull-stack DevelopmentPostgresqlOpenai ApiFrontend DevelopmentNext.jsAgile Project ManagementMicroservicesJavaPhp

Other Skills

Prisma ORMDockerGitlabGoogle Cloud Platform (GCP)TypeScriptAmazon Web Services (AWS)Amazon CloudFrontJiraChatGPTPrompt EngineeringJavaScriptTailwind CSSTech leadReduxWebSocket

About

Hello, I'm Arifin ๐Ÿ‘‹ Frontend Engineer with a Full-Stack experience. About 5 years of experience building high-performance applications. Now focused on LLM-powered systems and generative AI products for clients across Australia, Japan, and Indonesia. ๐Ÿค– ๐–๐ก๐š๐ญ ๐ˆ ๐๐ฎ๐ข๐ฅ๐ โ€ฃ AI-powered products โ€” LLM integrations (OpenAI, Azure OpenAI, GPT-4/5), multi-modal pipelines (speech-to-text โ†’ AI analysis), streaming architectures for reasoning models, and AI automation systems. โ€ฃ High-performance web applications โ€” Production systems processing millions of records, real-time collaborative tools, and interfaces optimized for speed (60s โ†’ 10ms load times, 38% Lighthouse improvements, 350x faster processes). โšก ๐‘๐ž๐œ๐ž๐ง๐ญ ๐€๐ˆ ๐–๐จ๐ซ๐ค โ€ฃ Built LLM-based effort estimation system automating code review and risk analysis for 30+ engineers โ€ฃ Integrated GPT-5 reasoning models with streaming architecture for enterprise generative AI platform โ€ฃ Developed medical consultation AI: multi-speaker transcription โ†’ GPT-4 analysis โ†’ treatment recommendations โ€ฃ Created content generation engine with Python, FastAPI, and text-to-speech AI ๐Ÿ›  ๐“๐ž๐œ๐ก๐ง๐ข๐œ๐š๐ฅ ๐’๐ค๐ข๐ฅ๐ฅ๐ฌ โ€ฃ AI/LLM: OpenAI API, Azure OpenAI, GPT-4/5, AssemblyAI, prompt engineering, streaming responses โ€ฃ Frontend: React, Next.js, TypeScript, TailwindCSS, Zustand, React Query โ€ฃ Backend: Node.js, Python, FastAPI, PostgreSQL, Cloudflare Workers/D1/R2 ๐ŸŒŸ ๐Ž๐ฉ๐ž๐ง ๐’๐จ๐ฎ๐ซ๐œ๐ž Created fullstack-next-cloudflare โ€” a production-ready Next.js + Cloudflare template for building generative-AI apps with 1.1k+ GitHub stars. I enjoy complex problems at the intersection of AI and product engineering. Let's connect ๐Ÿค

Experience

4 yrs 9 mos
Total Experience
1 yr 5 mos
Average Tenure
2 yrs 6 mos
Current Experience

Nri indonesia

9 roles

Frontend Engineer

Jan 2026 โ€“ Present ยท 4 mos ยท Remote

  • ๐„๐ง๐ญ๐ž๐ซ๐ฉ๐ซ๐ข๐ฌ๐ž ๐†๐ž๐ง๐ž๐ซ๐š๐ญ๐ข๐ฏ๐ž ๐€๐ˆ ๐๐ฅ๐š๐ญ๐Ÿ๐จ๐ซ๐ฆ ๐Ÿ๐จ๐ซ ๐“๐ž๐ฌ๐ญ ๐€๐ฎ๐ญ๐จ๐ฆ๐š๐ญ๐ข๐จ๐ง
  • โ€ฃ Integrated GPT-5 reasoning models with streaming architecture, delivering 10x more detailed results for automation script generation
  • โ€ฃ Built parameter management system for reasoning and non-reasoning models, expanding user control beyond basic temperature settings
Generative AIOpenAI APIReact.jsNext.js

Full Stack AI Engineer

Nov 2025 โ€“ Jan 2026 ยท 2 mos ยท Remote

  • ๐€๐ˆ-๐๐จ๐ฐ๐ž๐ซ๐ž๐ ๐„๐ง๐ ๐ข๐ง๐ž๐ž๐ซ๐ข๐ง๐  ๐Ž๐ฉ๐ž๐ซ๐š๐ญ๐ข๐จ๐ง๐ฌ ๐’๐ฒ๐ฌ๐ญ๐ž๐ฆ
  • โ€ฃ Built full-stack AI system for automated code review, merge request risk analysis, and effort estimation using LLM integration (OpenAI & Claude)
  • โ€ฃ System serves 30+ engineers in the company, eliminating hours of manual estimation and capturing previously missed billable hours from client projects
  • โ€ฃ Onboarded to the project and delivered accepted PR for core AI feature implementation within 1 week
Next.jsPostgreSQLPrisma ORMDockerGitlabGoogle Cloud Platform (GCP)+1

Frontend Engineer

Promoted

Sep 2025 โ€“ Nov 2025 ยท 2 mos ยท Remote

  • ๐“๐ž๐ฌ๐ญ ๐€๐ฎ๐ญ๐จ๐ฆ๐š๐ญ๐ข๐จ๐ง ๐ƒ๐š๐ญ๐š ๐€๐ง๐š๐ฅ๐ฒ๐ญ๐ข๐œ๐ฌ ๐๐ฅ๐š๐ญ๐Ÿ๐จ๐ซ๐ฆ โ€“ ๐€๐ฎ๐ฌ๐ญ๐ซ๐š๐ฅ๐ข๐š๐ง ๐‚๐ฅ๐ข๐ž๐ง๐ญ
  • โ€ฃ Integrated OpenAI API to generate insights from test automation results, designing prompts and data structures for accurate AI-powered analysis
  • โ€ฃ Delivered 40 pull requests in first month, becoming a core contributor within 4 weeks of onboarding
  • โ€ฃ Resolved 10+ production issues in first 30 days, stabilizing platform reliability
React.jsTypeScriptAmazon Web Services (AWS)Amazon CloudFrontJiraOpenAI API+3

Frontend Developer

Jun 2025 โ€“ Aug 2025 ยท 2 mos ยท Remote

  • ๐„๐‘๐ ๐‘๐ž๐ฏ๐š๐ฆ๐ฉ โ€” ๐‰๐š๐ฉ๐š๐ง๐ž๐ฌ๐ž ๐Œ๐ฎ๐ฅ๐ญ๐ข๐ง๐š๐ญ๐ข๐จ๐ง๐š๐ฅ ๐„๐ฅ๐ž๐œ๐ญ๐ซ๐จ๐ง๐ข๐œ๐ฌ ๐‚๐จ๐ฆ๐ฉ๐š๐ง๐ฒ
  • โ€ฃ Built 70+ reusable UI components serving as the design system foundation, cutting feature development time from 7-14 days to 1-2 days (85% reduction)
  • โ€ฃ Authored 50+ component and style guide specifications adopted by 20+ engineers, eliminating design inconsistencies across the ERP platform
  • โ€ฃ Recognized for cross-cultural collaboration: communicated directly with Japanese engineers, handled urgent requests, and consistently exceeded delivery expectations
React.jsJavaScriptTailwind CSSFrontend Development

Frontend Developer

Feb 2025 โ€“ May 2025 ยท 3 mos ยท Remote

  • ๐…๐ซ๐จ๐ง๐ญ๐ž๐ง๐ ๐’๐ญ๐š๐ง๐๐š๐ซ๐๐ฌ & ๐€๐ซ๐œ๐ก๐ข๐ญ๐ž๐œ๐ญ๐ฎ๐ซ๐ž
  • โ€ฃ Led frontend standardization initiative for NRI Indonesia, establishing architecture patterns adopted by 20+ engineers across multiple client projects
  • โ€ฃ Authored 6 comprehensive technical standards covering React/Next.js project structure, data fetching strategies, and authentication implementations
  • โ€ฃ Built internal Full-Stack Next.js boilerplate that cut new project setup and onboarding time by 10x, accelerating delivery for subsequent client engagements
React.jsNext.jsTypeScriptFront-End DevelopmentFrontend Development

Project Lead

Promoted

Apr 2023 โ€“ Feb 2025 ยท 1 yr 10 mos ยท Remote

  • ๐“๐ž๐ฌ๐ญ ๐€๐ฎ๐ญ๐จ๐ฆ๐š๐ญ๐ข๐จ๐ง ๐€๐ง๐š๐ฅ๐ฒ๐ญ๐ข๐œ๐ฌ ๐๐ฅ๐š๐ญ๐Ÿ๐จ๐ซ๐ฆ โ€” ๐€๐ฎ๐ฌ๐ญ๐ซ๐š๐ฅ๐ข๐š๐ง ๐‚๐ฅ๐ข๐ž๐ง๐ญ
  • โ€ฃ Led frontend development as NRI Indonesia's Project Representative, designated Project Development Lead by client for technical roadmap ownership
  • โ€ฃ Built reusable chart/table component library used across 30+ dashboards, cutting UI development time from 4 hours to 5 minutes per visualization (98% reduction)
  • โ€ฃ Improved Lighthouse performance scores by 38% (72 โ†’ 98), resulting in higher user engagement and longer session durations
  • โ€ฃ Implemented Storybook with Chromatic integration, preventing 90% of UI regressions during merge requests and enabling design reuse in ~5 minutes
  • โ€ฃ Proposed and implemented revamped Jira ticket structure, reducing ticket confusion by 10-15x and boosting sprint story point delivery by 68%
  • โ€ฃ Managed 5-person cross-functional team (2 backend engineers, 2 frontend engineers, 1 UI/UX designer), overseeing client communications and ensuring sprint deliverables aligned with product roadmap
React.jsTypescriptAgile Project ManagementTech lead

Frontend Developer

Mar 2023 โ€“ Apr 2023 ยท 1 mo ยท Remote

  • ๐‹๐ž๐ ๐š๐œ๐ฒ ๐’๐ฒ๐ฌ๐ญ๐ž๐ฆ ๐Œ๐ข๐ ๐ซ๐š๐ญ๐ข๐จ๐ง โ€” ๐Œ๐š๐ฃ๐จ๐ซ ๐‰๐š๐ฉ๐š๐ง๐ž๐ฌ๐ž ๐‘๐ž๐ญ๐š๐ข๐ฅ ๐‚๐ก๐š๐ข๐ง
  • โ€ฃ Contributed to modernizing legacy internal system for one of Japan's largest retail chains, enabling improved operational efficiency across 100+ stores
  • โ€ฃ Delivered requirement analysis and effort estimations that shaped the 6-month development roadmap, reducing scope ambiguity and preventing costly mid-project pivots
  • โ€ฃ Provided technical recommendations that influenced architecture decisions, ensuring scalability for future features expansion
Agile Project Management

Frontend Developer

Jan 2023 โ€“ Mar 2023 ยท 2 mos ยท Remote

  • ๐‚๐จ๐ฅ๐ฅ๐š๐›๐จ๐ซ๐š๐ญ๐ข๐ฏ๐ž ๐๐ƒ๐… ๐„๐๐ข๐ญ๐จ๐ซ โ€” ๐‰๐š๐ฉ๐š๐ง๐ž๐ฌ๐ž ๐’๐ฆ๐š๐ซ๐ญ ๐‚๐จ๐ง๐ฌ๐ญ๐ซ๐ฎ๐œ๐ญ๐ข๐จ๐ง ๐‚๐จ๐ฆ๐ฉ๐š๐ง๐ฒ
  • โ€ฃ Built real-time collaborative PDF editor enabling field operators and office teams to annotate construction blueprints simultaneously
  • โ€ฃ Implemented comment system allowing multiple users to leave threaded replies with up to 5 image attachments per comment
  • โ€ฃ Developed real-time collaborative drawing on PDF files using WebSocket, supporting up to 10 concurrent users per document, delivered in 2 weeks (1 sprint)
React.jsReduxWebSocketFrontend Development

Frontend Developer

Nov 2022 โ€“ Mar 2023 ยท 4 mos ยท Remote

  • ๐ƒ๐ฒ๐ง๐š๐ฆ๐ข๐œ ๐ˆ๐ง๐ญ๐ž๐ซ๐ง๐š๐ฅ ๐‡๐‘ ๐Œ๐š๐ง๐š๐ ๐ž๐ฆ๐ž๐ง๐ญ ๐€๐ฉ๐ฉ
  • โ€ฃ Developed HR application streamlining recruitment and leave tracking operations
  • โ€ฃ Built dynamic recruitment flow system using React Flow, reducing average time-to-hire from 4 weeks to 2.5 weeks and increasing recruiter efficiency by 30%
Tailwind CSSAgile Project ManagementTypescriptReact.jsScrum

Ibm

3 roles

System Analyst

Sep 2022 โ€“ Oct 2022 ยท 1 mo ยท Central Jakarta, Jakarta, Indonesia

  • ๐๐ˆ ๐…๐š๐ฌ๐ญ ๐ˆ๐ง๐ญ๐ž๐ซ๐›๐š๐ง๐ค ๐“๐ซ๐š๐ง๐ฌ๐Ÿ๐ž๐ซ โ€” ๐Œ๐š๐ฃ๐จ๐ซ ๐’๐ญ๐š๐ญ๐ž-๐Ž๐ฐ๐ง๐ž๐ ๐๐š๐ง๐ค
  • โ€ฃ Created 10 technical specifications (sequence diagrams, UI specs, API contracts) for BI Fast integration, enabling 3 development teams to work in parallel
  • โ€ฃ Aligned Product, Core Banking, Fraud Detection, and Engineering teams on microservice architecture, preventing weeks of rework from miscommunication
JiraAngularJSConfluenceAgile MethodologiesJavaMicroservices

Full Stack Developer

Aug 2022 โ€“ Sep 2022 ยท 1 mo ยท Central Jakarta, Jakarta, Indonesia

  • ๐‘๐ž๐š๐ฅ-๐“๐ข๐ฆ๐ž ๐Ž๐ฉ๐ž๐ซ๐š๐ญ๐ข๐จ๐ง๐ฌ ๐ƒ๐š๐ฌ๐ก๐›๐จ๐š๐ซ๐ โ€” ๐’๐ญ๐š๐ญ๐ž-๐Ž๐ฐ๐ง๐ž๐ ๐๐š๐ง๐ค
  • โ€ฃ Built end-to-end POC as sole full-stack developer: real-time dashboard monitoring critical data across multiple servers and databases
  • โ€ฃ Cut data collection time by 99% (60 minutes โ†’ 60 seconds), enabling real-time monitoring that was previously impossible
  • โ€ฃ Designed wireframes and UI in Whimsical and Figma, then developed working MVP in 3 weeks using PHP, CodeIgniter, jQuery, and Bootstrap
  • โ€ฃ Automated data pipeline for 4-person Data Operations team, saving 960+ hours annually (~$6K USD in labor costs)
CodeIgniterjQueryPHPBootstrapMySQLFull-Stack Development

Full Stack Developer

Jun 2021 โ€“ Jul 2022 ยท 1 yr 1 mo ยท Central Jakarta, Jakarta, Indonesia

  • ๐…๐ข๐ง๐š๐ง๐œ๐ข๐š๐ฅ ๐€๐ฎ๐ญ๐จ๐ฆ๐š๐ญ๐ข๐จ๐ง ๐’๐ฒ๐ฌ๐ญ๐ž๐ฆ โ€” ๐ˆ๐ง๐๐จ๐ง๐ž๐ฌ๐ข๐š'๐ฌ ๐‹๐š๐ซ๐ ๐ž๐ฌ๐ญ ๐‡๐ž๐š๐ฏ๐ฒ ๐Œ๐š๐œ๐ก๐ข๐ง๐ž๐ซ๐ฒ ๐‚๐จ๐ฆ๐ฉ๐š๐ง๐ฒ
  • โ€ฃ Delivered 4 core modules integrating SAP, Data Warehouse, RPA, and Financial Automation Dashboard
  • โ€ฃ Automated month-end accounting close, reducing process time from 1 month to 2 hours (350x faster) and freeing finance team for strategic work
  • โ€ฃ Built data pipeline processing 2 million monthly financial transactions in 10 minutes, feeding real-time analytics in Power BI
  • โ€ฃ Developed Account Receivables tracking system with automated email notifications, cutting debt resolution time from 6 months to 7-10 days and accelerating cash flow recovery

Ibm indonesia

Full Stack Engineer

Jun 2021 โ€“ Oct 2022 ยท 1 yr 4 mos

  • A subsidiary of IBM Global, delivering enterprise projects for leading companies in Indonesia.

Pt. delameta bilano

Embedded System Engineer

Jul 2020 โ€“ Jun 2021 ยท 11 mos ยท Jakarta, Indonesia

  • โ€ฃ Researched and implemented navigation algorithms for autonomous vehicle positioning using Ultra Wide Band (UWB) radio technology, achieving target accuracy of 4mm for indoor and outdoor environments
  • โ€ฃ Developed positioning system enabling autonomous car navigation inside buildings โ€” a technical challenge most GPS-based solutions cannot address
  • โ€ฃ Delivered weekly and monthly executive reports directly to Engineering Director and General Manager, earning 3 salary raises for outstanding performance

Pt. proweldindo

Paper Machine Steam & Condensate System Analyst Training

Jul 2019 โ€“ Aug 2019 ยท 1 mo ยท Perawang, Pekanbaru ยท On-site

  • โ€ฃ Conducted steam consumption audits on 3 industrial paper machines, identifying energy inefficiencies and recommending optimization strategies
  • โ€ฃ Delivered 2 technical audit reports to client stakeholders, contributing to operational efficiency improvements
  • โ€ฃ Collaborated directly with CEO, sales engineering manager, and foreign consultants across 2 client projects

Universitas gadjah mada

Research Assistant

Feb 2019 โ€“ Jul 2020 ยท 1 yr 5 mos ยท Yogyakarta Area, Yogyakarta, Indonesia ยท On-site

  • ๐–๐ข๐ซ๐ž๐ฅ๐ž๐ฌ๐ฌ ๐‚๐จ๐ฆ๐ฆ๐ฎ๐ง๐ข๐œ๐š๐ญ๐ข๐จ๐ง ๐‹๐š๐›๐จ๐ซ๐š๐ญ๐จ๐ซ๐ฒ โ€” ๐ƒ๐ž๐ฉ๐š๐ซ๐ญ๐ฆ๐ž๐ง๐ญ ๐จ๐Ÿ ๐๐ฎ๐œ๐ฅ๐ž๐š๐ซ ๐„๐ง๐ ๐ข๐ง๐ž๐ž๐ซ๐ข๐ง๐  ๐š๐ง๐ ๐„๐ง๐ ๐ข๐ง๐ž๐ž๐ซ๐ข๐ง๐  ๐๐ก๐ฒ๐ฌ๐ข๐œ๐ฌ
  • โ€ฃ Built Python simulations for radio communication mathematical models, enabling supervisor's research on 5G communications
  • โ€ฃ Implemented two indoor positioning algorithms for object localization, contributing foundational work later applied to autonomous navigation research
  • โ€ฃ Co-authored 2 academic papers on 5G communications and Indoor Positioning System technology
  • โ€ฃ Delivered weekly progress presentations to laboratory members, developing technical communication skills early in career

Pt. lentera bumi nusantara

Internship: Analysis of Wind Turbine Electrical Controller System

Jun 2018 โ€“ Aug 2018 ยท 2 mos ยท Ciheras, Tasik, Indonesia

  • 500๐– ๐’๐ค๐ฒ ๐ƒ๐š๐ง๐œ๐ž๐ซ ๐–๐ข๐ง๐ ๐“๐ฎ๐ซ๐›๐ข๐ง๐ž โ€” ๐„๐ฅ๐ž๐œ๐ญ๐ซ๐จ๐ง๐ข๐œ๐ฌ ๐‚๐จ๐ง๐ญ๐ซ๐จ๐ฅ๐ฅ๐ž๐ซ ๐‚๐ข๐ซ๐œ๐ฎ๐ข๐ญ (๐„๐‚๐‚)
  • โ€ฃ Analyzed and simulated Electronics Controller Circuit converting 3-phase AC to stable 30V 20A DC output for 500W-peak wind turbine
  • โ€ฃ Built complete circuit simulations using Powersim and SimetriX (SPICE-based), validating ECC performance before hardware implementation
  • โ€ฃ Collaborated with 8-person cross-university team (4 universities), coordinating weekly progress reports and presentations to project stakeholders
  • โ€ฃ Delivered weekly technical presentations synthesizing team progress and outlining next-week deliverables

Education

Universitas Gadjah Mada

Bachelor of Engineering โ€” Physics

Jan 2015 โ€“ Jan 2020

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