Available for Leadership & Architecture Consulting

FAJAR SUJITO

Engineering Leader & Full Stack Developer

Jakarta, Indonesia fajarsujito.my.id ↗

Professional Summary 8+ Years Senior Scale

Engineering leader with 8+ years building and scaling backend platforms for fintech and trading. Led teams of up to 15 engineers across backend, DevOps, and QA, and migrated production to AWS with 99.95% uptime. Designed a failover gateway for high-frequency trading and an event-driven architecture (RabbitMQ, CQRS, SAGA). Experienced in BCP, and driving AI-assisted development adoption across engineering teams.

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Fajar Sujito, S.Kom

Engineering Leader

Jakarta, Indonesia

Experience

8+ Years

Fintech & Trading

Team Scope

Up to 15

Cross-functional

AWS Migration

99.95%

Production Uptime

Failover

< 30s

Recovery Time

AI-Assisted Dev +30% Velocity Boost

Direct Channels

8+ Years

Scaling Platforms

High-frequency trading & distributed backends

99.95%

Uptime Record

Production AWS architecture & high availability

15 Engineers

Led & Mentored

Cross-functional squads (Backend, QA, DevOps)

< 30s

Trading Failover

Zero data loss gateway & BCP standards

01 // Technical Capabilities & Skills

Curated Skills & Stack

Hands-on architectural and engineering stack honed over 8+ years building enterprise fintech, event-driven trading platforms, and modern web applications.

Summary of Core Competencies

System Design Distributed Systems Event-driven Observability Team Building High Availability AI Assisted Development BCP

Architecture & Resilience

System Design Distributed Systems Event-Driven (Saga / CQRS) Microservices High Availability (HA) BCP Frameworks Failover Gateways

Backend & Protocols

Go (Golang) Node.js Laravel & Lumen Python REST API FIX API (Market Data) WebSocket & Socket.IO

Cloud & Observability

AWS (ECS, EKS, API GW, RDS) Cloudflare ELK Stack (Logging) Docker CI/CD Automation Vercel

Messaging & Databases

RabbitMQ Redis MySQL PostgreSQL DynamoDB Query Optimization

Frontend & Mobile

TypeScript React Next.js React Native Tailwind CSS Lighthouse 95+ Score

Leadership & AI Adoption

Engineering Leadership Team Building (Up to 15) AI-Assisted Dev (Kiro, OpenRouter) Code Review & CI/CD Standards Sprint Velocity Acceleration

02 // Professional Work Experience

Career History

Proven track record spanning 8+ years across high-frequency trading, fintech platforms, enterprise retail, and product engineering.

Full Stack Developer

Current

Independent Product Builder

Jan 2023 — Present

Independently owned architecture and product implementation for production web applications built with React, Next.js, and TypeScript.
Led the design of reusable UI patterns and scalable component structures to keep features consistent, maintainable, and fast to ship.
Improved frontend responsiveness, SEO, accessibility, and user experience through interface refactoring, page optimization, and cleaner interaction flows, achieving Lighthouse scores of 95+ across Performance, Accessibility, Best Practices, and SEO.
Hardened the application with a strict Content Security Policy, HSTS, and a full set of security headers, earning an A+ rating on securityheaders.com.
Integrated backend APIs for authentication, analytics, payments, and product workflows, ensuring frontend behavior stayed reliable across releases.
Drove code quality and workflow improvements that made the application easier to extend and support over time.

React Next.js Laravel Go TypeScript Tailwind CSS REST API AWS Sentry Cloudflare Vercel

Engineering Lead

High Frequency Trading

PT Surya Anugrah Mulya

Nov 2024 — Aug 2026

Architected a failover gateway for high frequency trading operations, ensuring business continuity with under 30 second recovery time and 99.95% uptime during market hours.
Led the production migration to AWS, raising uptime from 99.5% to 99.95% and cutting incident detection time by 60% through ELK based observability.
Built and led a 12 person cross functional team, reducing release cycle time from 2 weeks to 3 days while mentoring engineers and strengthening engineering discipline.
Introduced AI assisted development practices across the team, improving delivery speed by 30% and automating code review, unit test generation, and boilerplate scaffolding using Kiro and OpenRouter.
Established the BCP framework and monitoring standards across 15 critical systems.
Drove cross department process automation with IT, Product, Corporate Strategy, and Operations, saving ~80 hours per month of manual reporting while securing data flow.

AWS Cloudflare MySQL Redis RabbitMQ ELK Stack REST API FIX API Microservices Laravel Node.js Go Docker AI Assisted Dev

Research And Development Lead

PT Surya Anugrah Mulya

Jan 2024 — Oct 2024

Spearheaded the architecture modernization roadmap, decomposing a monolith into 8 microservices with event-driven patterns, reducing deployment time from hours to under 15 minutes.
Pioneered the company's DevOps practice: introduced Git workflow, CI/CD pipelines, and automated deployments, increasing release frequency from monthly to weekly and cutting deployment errors by 70%.
Built a trading algorithm simulation environment used by the team to backtest and validate 12 strategies before production release.
Delivered proof of concept integrations with liquidity providers via REST and FIX API.
Led a 3 person R&D unit focused on scalability, latency reduction, and real-time data broadcasting, achieving 40% lower latency on the market data distribution pipeline.

AWS Laravel Python Go Node.js MetaTrader FIX API

Engineering Lead

Backend Org Head

MIFX (Monex Investindo Futures)

Jan 2023 — Dec 2023

Led the Backend organization of 13+ engineers, directly managing 3 tribe leads / technical leads and setting technical direction across squads.
Introduced an event driven microservices architecture using RabbitMQ, SAGA, and CQRS patterns, improving data consistency across 9 services and reducing order processing latency by 35%.
Designed the API layer with AWS API Gateway and service/repository patterns, supporting ~500,000 requests per day with p95 response time under 250 ms.
Built real time notification delivery with Socket.IO, pushing trade and price updates to ~3,000 concurrent users with under 1 second delay.
Delivered trading platform features for web, working with frontend teams to cut page load time by 40% and improve application performance.
Shipped scalable APIs and frontend integrations for 4 financial products, contributing to 25% growth in active trading accounts.

Laravel MySQL Redis ELK Stack Microservices RabbitMQ CQRS / SAGA Socket.IO

Technical Lead

MIFX

May 2022 — Dec 2022

Architected the microservices infrastructure for the trading platform on AWS (API Gateway, NLB, ECS, Aurora, Redis, Docker), supporting ~2,000 concurrent users with 99.9% uptime.
Designed and deployed the ELK stack for centralized logging and monitoring, reducing mean time to detect incidents from ~4 hours to ~15 minutes.
Architected the MIFX platform on Alibaba Cloud, delivering a multi-cloud track record across AWS and Alibaba Cloud, with 7 services deployed and zero downtime releases.
Integrated the OneZero FIX API for order routing and price feeds, handling ~20,000 orders per day with ~50 ms average latency.
Established engineering standards (code conventions, service/repository pattern, unit testing) across 3 projects (AMB, MIFX, Value Trade), raising test coverage from ~10% to ~70%.
Led technical hiring and onboarding: planned the hiring process and recruited 6 engineers within 4 months, reducing time to hire by 30%.

AWS Laravel Node.js RabbitMQ FIX API Socket.IO ELK Redis Docker

Technical Lead

15 Engineers Led

DXTR ASIA

Aug 2020 — May 2022

Led a cross-functional team of ~15 engineers (Backend, Frontend, QA), coordinating delivery across 3 vendors and 4 squads while partnering with the CTO and Project Manager on roadmap and priorities.
Designed and scaled a notification platform delivering ~5 million notifications per day and large scale data exports, sustaining ~20,000 messages per minute at peak with 99.9% delivery success.
Evolved microservices and event driven systems on AWS (ECS, EKS, API Gateway, Aurora, DynamoDB), cutting infrastructure cost by ~25% and improving p95 response time from ~800 ms to ~300 ms.
Improved CI/CD and deployment pipelines, reducing release time from ~2 hours to ~20 minutes and increasing deployment frequency from bi weekly to daily.
Strengthened system reliability with New Relic monitoring and alerting, reducing production incidents by ~40% and mean time to resolve by ~50%.
Raised engineering quality through code review standards, security reviews, and Agile practices; mentored engineers and supported hiring, onboarding, and performance reviews.

Angular React Node.js Laravel Lumen MySQL DynamoDB AWS (ECS, EKS) Redis ELK CI/CD

Lead Backend Developer

SRC Project Migration

DXTR ASIA

Aug 2019 — Jul 2020

Led the migration of SRC projects from monolith to microservices on AWS (ECS), cutting deployment time from ~1 hour to ~10 minutes and improving API response time by ~45%.
Led and mentored a backend team of 5 engineers, setting technical direction on performance, reliability, and maintainability; reduced production bugs by ~35% through code review standards and SonarQube quality gates.
Designed and implemented asynchronous messaging with AWS SQS and SNS, decoupling services and handling ~100,000 events per day with zero message loss.
Built and maintained large-scale applications for 4 client projects (Spotme, Toyota Admin, AYO-SRC, IQOS), serving ~50,000 active users across web and mobile.
Improved CI/CD with Jenkins and monitoring with New Relic, raising test coverage from ~15% to ~65% and reducing incident response time by ~40%.

PHP Laravel MySQL DynamoDB Redis AWS ECS Jenkins SonarQube

Senior Backend Developer

SRC Core Backend

DXTR ASIA

Jul 2018 — Jul 2019

Built the SRC backend from the ground up (B2B, B2C, and DTE platforms), supporting ~3,000 concurrent users at launch with 99.5% uptime.
Designed REST APIs in Laravel and Lumen, with MySQL, Redis, and DynamoDB caching strategies that cut average API response time by ~50% and database load by ~40%.
Integrated OTP messaging and Gojek delivery services, achieving >98% OTP delivery success and enabling same day delivery for ~500 orders per day.
Monitored performance with New Relic and Flare, reducing production errors by ~30% and resolving critical incidents in under 2 hours on average.

Laravel Lumen MySQL Redis DynamoDB AWS Docker

Lead Engineer

ISO 27001 Security

PT Rayanusa Tekno Medika

Apr 2020 — Apr 2026

Architected and delivered the EMOP electronic office management platform (Laravel, React, MySQL), serving ~2,000 users with a ~3-month go-live.
Designed the cloud infrastructure for EMOP and advised on AWS security architecture for the ICE ON IMERI project, closing ~25 security findings from the initial assessment.
Implemented OWASP Top 10 safeguards aligned with ISO 27001 controls, passing 2 penetration test rounds with zero critical findings.
Led a team of 2 backend and frontend engineers as software architect for the Travel Pass web and mobile platform, working directly with the client and project manager.
Integrated payment gateways (DOKU, Midtrans, iPaymu) into Travel Pass, supporting 3 payment methods with ~96% payment success rate.

Laravel React Payment Gateway AWS MySQL Redis OAuth2 React Native

Senior Backend Engineer

Government LKPP Platform

Crocodic

Sep 2021 — Dec 2021

Built RESTful APIs with Lumen and MySQL in a microservices architecture for Toko Daring LKPP, a national government e-procurement marketplace.
Developed the Request for Quotation (RFQ) system, enabling buyers to request and compare vendor offers.
Implemented real-time chat and notifications with WebSocket (Node.js, Socket.io), supporting ~1,500 concurrent connections with under 1-second delivery.

PHP Lumen Node.js Socket.io MySQL

Lead Engineer

Hybrid ERP & PWA

PT Satuu Teknologi Utama

Jan 2021 — Apr 2022

Built an ERP system (inventory, purchasing, and sales modules) with automatic hybrid online/offline mode, letting warehouse staff keep working through connectivity loss and syncing data once back online with zero data loss.
Designed the backend with a service-pattern architecture (Lumen, MySQL), supporting ~200 users across 21 warehouses and branches.
Implemented a Progressive Web App (PWA) with offline caching, cutting page load time by ~50% and eliminating downtime-related stock-entry delays.
Led a frontend team of 2 engineers (React.js) and delivered a React Native mobile app for warehouse operations, reducing manual stock count.
Set up and managed the AWS cloud environment (EC2, RDS, S3), achieving 99.9% uptime and reducing hosting cost by ~20% versus the previous setup.

PHP Lumen MySQL React React Native AWS

Full Stack Developer

PT Internet Solusi Layanan Informasi Mandiri

Apr 2018 — Jun 2018

Delivered ~2 web applications end to end, including company profiles, e-commerce, e-government, and GIS platforms, for ~2 clients.
Translated requirements from the CTO and business team into database designs and user interfaces, reducing rework by ~30%.
Built admin dashboards and reporting modules that replaced manual spreadsheet reporting.

PHP CodeIgniter PostgreSQL JavaScript HTML/CSS

03 // Selected Projects & Products

11 Featured Deployments

Production systems across quantitative fintech, liquidity brokerage, enterprise retail, and SaaS portals.

Flagship Enterprise Scale · Technical Lead · 2018

Sampoerna Retail Community (SRC)

src.id

A comprehensive ecosystem of 7 interconnected web and mobile platforms modernizing Indonesia's traditional grocery and retail community. Engineered with a scalable microservices backbone on AWS, enabling high-volume transactions, inventory coordination, order fulfilment, and store analytics.

Architecture

Distributed Microservices on AWS

Scope

7 Interconnected Web & Mobile Apps

Key Technologies

Laravel · Angular · React Native · AWS

Quantitative Analytics 2026

Sobat Saham

Quantitative analytics platform for the Indonesia Stock Exchange (IDX), providing retail investors with disciplined valuation screeners, technical signals, and portfolio tracking.

Full Stack Developer · IDX · Next.js

sobatsaham.com

Liquidity Provider 2026

AMB Megatrend

Liquidity provider and institutional administration dashboard built for precision financial operations, position risk assessment, and high-frequency reporting.

Engineering Lead · Risk Assessment

ambmegatrend.com

Global Placement 2025

Alzubara

Verified international career placement platform connecting Indonesian skilled professionals with certified, legal employment opportunities across the Middle East and globally.

Full Stack Developer · Compliance

alzubara.co.id

Flight Booking Platform 2025

GOGOJALAN

GOGOJALAN is a flight booking platform for domestic and international travel, providing flight search, booking inquiries, pricing, and customer support through an integrated web experience.

Full Stack Developer · Travel Tech

gogojalan.com

Global Brokerage Portal 2023

M2 (Valutrades)

High-performance portal and trading interface for global forex, indices, and commodities trading prioritizing strict execution speed, data transparency, and security.

Engineering Lead · Forex & Commodities

valutrades.com

Fintech Trading Platform 2022

MIFX

Forex and commodity trading web applications featuring low-latency market order execution, real-time WebSocket notifications, and event-driven architecture with RabbitMQ.

Engineering Lead · RabbitMQ · Socket.IO

mifx.com

Industrial Bakery ERP 2021

ERP Khasanahsari

End-to-end Enterprise Resource Planning platform tailored for bakery production, raw material forecasting, batch tracking, outlet logistics, and automated ledger balancing.

Lead Engineer · Supply Chain · PostgreSQL

erpkhasanahsari.com

Medical Office Management 2020

EMOP (POGI)

Integrated medical membership portals for the Indonesian Society of Obstetrics and Gynecology, managing professional accreditation, clinical education records, and digital congress events.

Lead Engineer · Laravel · React

emop.pogi.or.id

Unified Member Program 2020

ONEPOGI

ONEPOGI is a unified membership contribution program that provides POGI members with eight key benefits, supported by POGI’s Electronic Management Office (EMOP-POGI). Initiated by the POGI Central Board.

Lead Engineer · Security · Central Board

one.pogi.or.id

EdTech & Tutoring 2020

QuickMath

Online learning and automated tutoring platform featuring step-by-step mathematical reasoning, tutor booking consultation flows, and interactive problem solving.

Full Stack Developer · Interactive Math

quickmath.id

04 // Verified Certifications & Credentials

Verified Credentials

Certifications across Cloud Architecture, Microservices, ISO 27001 Security, and Backend Design.

Google Cloud 2022

Menjadi Google Cloud Engineer

Dicoding Indonesia

ID: 0LZ01R2QQP65

AWS Architecture 2022

AWS Services for Solutions Architect Associate [2021]

Udemy

ID: UC-d6bd...795

AWS Cloud 2021

Architecting on AWS (Membangun Arsitektur Cloud di AWS)

Dicoding Indonesia

ID: 1OP8L72L2ZQK

Microservices & Mesh 2021

Microservices with Istio & IBM Cloud Kubernetes

IBM

ID: b3d117c9...816

Information Security 2021

ISO 27001 - Network & Communication Security

Udemy

ID: UC-b64b...592

Cloud Infrastructure 2024

Oracle Cloud Infrastructure Foundations 2021 Associate

Oracle

ID: 74FC7A2D...

Clean Code & OOP 2021

Software Architecture & Clean Code Design in OOP

Udemy

ID: UC-05db...53c

Security & Pentesting 2021

Pentesting & Securing Web Applications (Ethical Hacking)

Udemy

ID: UC-1850...099

Backend Engineering 2021

Back End Development and APIs

freeCodeCamp

ID: fcc52f59...

05 // Education & Languages

Academic Foundations

Universitas Negeri Semarang

Bachelor of Computer Science (S.Kom)

2016 — 2020

Focus on Software Engineering, Web Technologies & Distributed Systems.

GPA 3.6 / 4.00 Cum Laude Honor

Hiroshima University, Japan

Short Academic Course

2016

International Academic & Research Exchange · Hiroshima, Japan.

Languages

Indonesian Native / Bilingual

English Professional Working

Academic Publications

Co-authored peer-reviewed research papers in System Usability (SUS & GOMS) and MVC Frameworks for SDLC (IOP Journal of Physics & JAIST).

06 // Initiate Contact

Open to Strategic Discussions

Ready to architect and scale mission-critical platforms together?

Whether you need seasoned engineering leadership, distributed systems architecture consulting, high-availability failover design, or full-stack platform execution, feel free to reach out directly.

fjarfs@gmail.com +6281903492372 Download CV (PDF)

Portfolio: fajarsujito.my.id ↗ LinkedIn ↗ GitHub ↗ Jakarta, Indonesia (UTC+7)