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fajar mawan

@fajarmawan

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I build end-to-end logistics and customs automation products with Golang and AI.

Indonesia

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I'm building end-to-end customs and logistics automation at fr8co.ai, spanning specifications, backend, frontend, and an AI layer developed with Claude AI as a daily partner.

I delivered CEISA-integrated customs flows for BC 3.3, P3BET, BC 1.6, BC 2.7, and BC 2.8, plus Automatch v2 to automatically match restricted-goods documents to product items. I also built a self-improving extraction feedback loop that learns from corrections.

Across ByteDance, GoTo Logistics, and Tokopedia, I led inbound and shipment teams while building warehouse processes for incoming goods and shipment management. I partnered with stakeholders, planned delivery through Scrum, and developed backend and frontend systems with Golang, Kafka, PostgreSQL, Redis, GraphQL, and React.

Previously at Sorabel, I built SAP-integrated aggregation and stock-sync services that improved stock accuracy and reduced manual-entry errors by 99%. I've also built loyalty, voucher, payment, WMS, banking, and government systems, while mentoring engineers and contributing to hiring.

Experience

Work history, roles, and key accomplishments

Current

Senior Product Engineer

Current

PT Freightco Technology Innovation

Jun 2026 - Present (4 months)

Building customs and logistics automation end to end, including backend, frontend, and AI layers, with Claude AI as a daily development partner. Led key projects such as Automatch v2, BC 3.3 & P3BET, and self-improving AI extraction.

Claude AI Product Engineering Backend Frontend AI Customs Automation Logistics Automation CEISA

Squad Lead

PT. Elektronik Distribusi Otomatisasi Terkemuka

Dec 2025 - Apr 2026 (4 months)

Led an engineering squad covering technical planning, code review, mentoring, and end-to-end feature delivery. Enhanced the sales reporting service and led the development of a credit-based purchase feature.

Go MongoDB Redis REST APIs React Technical Planning Code Review Mentorship

Senior Software Engineer

ByteDance

May 2024 - Oct 2025 (1 year 5 months)

Led the Inbound team throughout development, ensuring smooth operations and continuous improvement. Collaborated with stakeholders and cross-functional teams to design systems and manage the development cycle using Scrum.

Go Kafka PostgreSQL Redis Hasura GraphQL REST APIs React TypeScript React Native Scrum

Software Engineer Lead

GoTo Logistics

Feb 2024 - Apr 2024 (2 months)

Go Kafka PostgreSQL Redis Hasura GraphQL REST APIs New Relic Scrum

Software Engineer Lead

Tokopedia

Jan 2023 - Jan 2024 (1 year)

Led the Inbound and Shipment teams throughout development, ensuring smooth operations and continuous improvement. Collaborated with stakeholders and cross-functional teams to design systems and manage the development cycle using Scrum.

Go Kafka PostgreSQL Redis Hasura GraphQL REST APIs New Relic Scrum

Senior Software Engineer

Tokopedia

Jan 2022 - Dec 2022 (11 months)

Led a team to design and implement systems using best practices, ensuring optimal performance and efficiency. Designed and developed systems for managing incoming goods and shipment management within the warehouse.

Go Kafka PostgreSQL Redis Hasura GraphQL REST APIs New Relic

Senior Backend Engineer

PT Swift Logistics Solutions

Aug 2021 - Jan 2022 (5 months)

Designed and developed core services for Warehouse Management System (WMS) version 2, with improvements in product management, incoming goods processing, and application infrastructure. Participated in the hiring process from screening to onboarding.

Go Kafka PostgreSQL Redis Hasura GraphQL REST APIs Grafana WMS

Software Development Specialist

LinkAja (PT Fintek Karya Nusantara)

Oct 2020 - Jun 2021 (8 months)

Designed and developed loyalty point services and voucher services for end users. Introduced Domain Driven Design and created project skeleton with clean architecture. Designed and developed services for accountability and budget expenses.

Go Kafka MySQL PostgreSQL Docker Domain Driven Design Clean Architecture

Software Engineer

Sorabel (PT Sale Stock Indonesia)

Apr 2018 - Jul 2020 (2 years 3 months)

Designed and developed data aggregation services integrated with SAP, reducing manual data entry errors by 99%. Developed stock sync, payment, and refund services, and maintained 10+ existing services.

Go Scala Python React Kafka gRPC GraphQL MySQL Kubernetes Docker

Backend Engineer

Wonderlabs Pte. Ltd

Feb 2017 - Mar 2018 (1 year 1 month)

Designed and developed RESTful APIs for client projects under tight deadlines, ensuring scalability and reliability. Led a team of 2 engineers to deliver high-quality software products on schedule.

NodeJS JavaScript jQuery MongoDB REST APIs Docker Travis CI

Backend Developer

PT Javan Cipta Solusi

Jun 2016 - Jan 2017 (7 months)

Developed internal systems for banks and government with tight deadlines.

Spring Boot MySQL JavaScript

Education

Degrees, certifications, and relevant coursework

Udemy

UML and Object-Oriented Design Foundations, Object-Oriented Design

2021 - 2021

Completed a course on UML and Object-Oriented Design Foundations.

Udemy

SOLID Principles of Object-Oriented Design and Architecture, Object-Oriented Design

2021 - 2021

Completed a course on SOLID Principles of Object-Oriented Design and Architecture.

Coursera

Google Cloud Platform Fundamentals: Core Infrastructure, Cloud Computing

2020 - 2020

Completed the Google Cloud Platform Fundamentals: Core Infrastructure course.

Islamic University of Indonesia

Bachelor of Computer Information Systems, Computer Information Systems

2012 - 2016

Grade: 3.87/4.0

Activities and societies: Assistant lecturer and lab assistant in Computation and Intelligence Systems

Bachelor of Computer Information Systems with a cumulative GPA of 3.87/4.0. Served as an assistant lecturer and lab assistant in Computation and Intelligence Systems.