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I’m a backend-first full stack engineer focused on building reliable production systems, integrating services, and improving stability under real-world constraints. I’ve worked across backend, frontend, and mobile layers, with experience in API design, event-driven flows, real-time data handling, and production support. I also integrate AI-powered workflows into practical systems—such as automated processing and AI-assisted decision flows—while keeping operational visibility and performance in mind. I’m comfortable joining ongoing projects, understanding legacy architecture, and delivering incremental improvements that scale with business needs.…I’m a backend-first full stack engineer focused on building reliable production systems, integrating services, and improving stability under real-world constraints. I’ve worked across backend, frontend, and mobile layers, with experience in API design, event-driven flows, real-time data handling, and production support. I also integrate AI-powered workflows into practical systems—such as automated processing and AI-assisted decision flows—while keeping operational visibility and performance in mind. I’m comfortable joining ongoing projects, understanding legacy architecture, and delivering incremental improvements that scale with business needs.

Nandang Hermawan

Full Stack Developer, Software Engineer, Architect, +6

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I’m a backend-first full stack engineer focused on building reliable production systems, integrating services, and improving stability under real-world constraints. I’ve worked across backend, frontend, and mobile layers, with experience in API design, event-driven flows, real-time data handling, and production support. I also integrate AI-powered workflows into practical systems—such as automated processing and AI-assisted decision flows—while keeping operational visibility and performance in mind. I’m comfortable joining ongoing projects, understanding legacy architecture, and delivering incremental improvements that scale with business needs.…I’m a backend-first full stack engineer focused on building reliable production systems, integrating services, and improving stability under real-world constraints. I’ve worked across backend, frontend, and mobile layers, with experience in API design, event-driven flows, real-time data handling, and production support. I also integrate AI-powered workflows into practical systems—such as automated processing and AI-assisted decision flows—while keeping operational visibility and performance in mind. I’m comfortable joining ongoing projects, understanding legacy architecture, and delivering incremental improvements that scale with business needs.

Available to hire

I’m a backend-first full stack engineer focused on building reliable production systems, integrating services, and improving stability under real-world constraints. I’ve worked across backend, frontend, and mobile layers, with experience in API design, event-driven flows, real-time data handling, and production support.

I also integrate AI-powered workflows into practical systems—such as automated processing and AI-assisted decision flows—while keeping operational visibility and performance in mind. I’m comfortable joining ongoing projects, understanding legacy architecture, and delivering incremental improvements that scale with business needs.

Skills

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Work Experience

Full Stack Engineer — RAG Document AI at PT. Alugra

January 1, 2026 - February 1, 2026

Developed and maintained scalable backend services and frontend widgets for a knowledge AI RAG (Retrieval-Augmented Generation) document-based platform. Built RESTful APIs for multi-tenancy document management integrated with NLP-based AI reasoning. Designed and optimized chat widgets for modular deployment across multiple client projects while addressing performance bottlenecks and production stability.

Full Stack Engineer (RAG Document AI) at PT. Aluagra (Freelance Contract)

January 1, 2026 - February 28, 2026

Developed and maintained scalable backend services and frontend widgets for a knowledge AI RAG platform. Built REST APIs supporting multi-tenant document management integrated with NLP-based AI reasoning. Designed and optimized chat widgets for modular deployment across client projects while managing performance bottlenecks and production stability.

Backend Engineer — Bea Cukai TPS Online System at PT Alugra (Freelance contract)

July 1, 2025 - January 1, 2026

Developed scalable backend services for customs (Bea Cukai) TPS Online systems, including cargo manifest processing and system-to-system integrations. Implemented strict authentication, authorization, and role-based access control (RBAC). Optimized database queries for high reliability and production readiness.

Back-End Engineer - Bea Cukai TPS Online System at PT. Alugra (Freelance Contract)

July 1, 2025 - January 31, 2026

Developed scalable backend services for customs (Bea Cukai) TPS online systems, including cargo manifest processing and system-to-system integrations. Implemented strict authentication, authorization, and role-based access control (RBAC) with optimized database queries for high reliability. Architected multi-tenant REST APIs for unstructured document ingestion, embedding, and NLP reasoning workflows.

Architecture & Core Services — Tech Lead / Full-Stack Engineer at Bagdja ecosystem

January 1, 2025 - Present

Led Bagdja’s core services and architecture across identity/SSO, payments, and event-driven communication. Built Bagdja-auth using NestJS and TypeORM to manage JWT/refresh tokens, OAuth flows, and service-to-service authentication across the ecosystem using internal API keys. Developed a secure payment ledger service with milestone/escrow and subscription billing using NestJS and BullMQ, including a pluggable payment gateway pattern configured via database tables. Implemented an event service using RabbitMQ and Redis with webhook workers and retry/backoff mechanisms. Built multi-tenant Next.js dashboards with secure httpOnly cookie authentication and multilingual support (id/en/ms/fil/vi). Configured custom multi-tenant domain routing, domain verification, Coolify API automation, and Traefik reverse-proxy synchronization.

Technical Lead / Full-Stack Engineer at Bagdja Ecosystem (Bagdja-auth, Bagdja-payment-service, Bagdja-event-service)

January 1, 2025 - Present

Designed and built centralized authentication services (NestJS, TypeORM) handling JWT/refresh tokens, OAuth flows, and service-to-service auth across the ecosystem. Developed secure ledger services for wallets, escrow milestones, and subscription billing using NestJS and BullMQ, including a pluggable payment gateway pattern configurable via database tables and clean decoupling of audit trails from core business logic. Built an event hub leveraging RabbitMQ and Redis with webhook workers and retry/backoff. Delivered multi-tenant dashboards using Next.js with secure httpOnly cookie authentication and multi-language support. Implemented infrastructure routing for multi-tenant website builders, including domain verification and reverse-proxy synchronization.

Full Stack Engineer — AI-Powered Legal Platform at Shoppias Commerce LLC

January 1, 2024 - December 1, 2025

Designed and built backend and frontend components for an AI-driven legal platform connecting clients and lawyers. Implemented real-time and asynchronous communication flows for AI chat, voice calls, automated client intake, and scheduling consultations to streamline legal engagement end-to-end.

Front End Engineer at PT Akal Karya Indonesia

January 1, 2024 - December 1, 2025

Developed and maintained responsive, high-performance web applications focusing on maintainable frontend architecture and reusable UI components using React and Next.js. Integrated complex REST APIs, handling efficient state validation, error handling, and performance optimization through code-splitting and lazy loading. Collaborated closely with backend engineers, UI/UX designers, and QA to ensure alignment with business requirements.

Full Stack Engineer - AI-Powered Legal Platform at Shoppias Commerce LLC (Freelance Contract)

January 1, 2024 - December 31, 2025

Front End Engineer at PT. Akal Karya Indonesia

January 1, 2024 - December 31, 2025

Developed and maintained responsive, high-performance web applications focusing on maintainable frontend architecture and reusable UI components. Integrated complex REST APIs with efficient state validation, error handling, and performance optimization through code-splitting and lazy loading. Collaborated with backend engineers, UI/UX designers, and QA teams to ensure alignment with business requirements.

Full Stack Engineer — TEC0 (AI Document & Data Analyst) at Allpowl Ltd. (Freelance contract)

January 1, 2023 - January 1, 2024

Built an AI-powered document management platform with asynchronous file capture pipelines and real-time status monitoring dashboards (queued, processing, completed). Processed and structured metadata to support downstream AI analytics modules and extract deeper business insights.

Full Stack Engineer - TECO (AI Document & Data Analyst) at Allp ow Ltd. (Freelance Contract)

January 1, 2023 - December 31, 2024

Full Stack Engineer — Delivery & Ride-Hailing at Shoppias Commerce LLC

January 1, 2022 - January 1, 2023

Designed on-demand platforms supporting delivery and ride-hailing with real-time data streams for trip tracking and order updates. Integrated a WhatsApp-based conversational AI module enabling natural language order placement and tracking.

Full Stack Engineer - Delivery & Ride-Hailing at Shoppias Commerce LLC (Freelance Contract)

January 1, 2022 - December 31, 2023

Software Engineer — Field Operations & Survey Monitoring at PT Suzuki Finance Indonesia

January 1, 2021 - January 1, 2022

Developed offline-first mobile and web apps for field surveyors using local data caching and robust synchronization queues for low-connectivity environments.

Software Engineer - Field Operations & Survey Monitoring at PT. Suzuki Finance Indonesia (Project-Based)

January 1, 2021 - December 31, 2022

Developed offline-first mobile and web apps for field surveyors, including local data caching and robust synchronization queues for low-connectivity areas.

Software Engineer — Real-Time Trading System at PT Yuanta Sekuritas Indonesia

January 1, 2020 - January 1, 2022

Built backend and frontend socket-based communications for a high-frequency, low-latency real-time market data trading application using Flutter.

Software Engineer - Real-Time Trading System at PT. Yuanta Sekuritas Indonesia (Project-Based)

January 1, 2020 - December 31, 2022

Built backend and frontend socket-based communications for a high-frequency, low-latency real-time market data trading application. Engineered low-latency socket streaming communication to handle high-volume real-time financial market data feeds.

Full Stack Engineer / Technical Team Lead — Mobile App & Backend at PT Enerren Technologies

January 1, 2018 - January 1, 2024

Designed, developed, and maintained scalable logistics mobile applications using Flutter, with high-performance backend services built on C# (.NET Core) and SQL Server. Worked on logistics domains such as truck inspection and digital logistics workflows for Unilever Indonesia. Created a monorepo-based architecture to support multiple applications from a single codebase with shared modules and consistent development practices. Built and optimized database interactions, queries, and system integrations across internal and external applications. Collaborated across backend, frontend, and UI/UX teams to align system design with product requirements, resolve performance bottlenecks, and ensure production stability.

Full Stack Engineer / Technical Team Lead - Mobile App & Back-End at PT. Enerren Technologies

January 1, 2018 - December 31, 2024

Designed, developed, and maintained scalable logistics mobile applications (including truck inspection and digital logistics systems) using Flutter, supported by high-performance backend services in C# (.NET Core) and SQL Server. Built a monorepo-based architecture to support multiple applications from a shared codebase with shared modules and consistent development practices. Led backend, frontend, and UI/UX collaboration to align system design with product and business requirements, address performance bottlenecks, and ensure production stability. Optimized database interactions and system integrations across internal and external applications.

Education

Bachelor of Computer Science / Software Engineering at STMIK AMIK Bandung

January 11, 2030 - January 1, 2015

Bachelor of Computer Science / Software Engineering at STMIK AMIK Bandung

January 1, 2011 - January 1, 2015

Qualifications

Industry Experience

Software & Internet, Computers & Electronics, Transportation & Logistics, Financial Services, Consumer Goods, Education, Professional Services, Telecommunications