Fatkhur Rozak
Google Associate Cloud Engineer · Open to work

I build backend systems that scale and stay up.

Hi, I'm Fatkhur Rozak, a backend engineer working in Go, Node.js and Python. I design distributed workers, anti-bot data extraction, LLM integrations and high-availability databases, and I ship them fast.

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Sidoarjo, East Java · fatkhurawe@gmail.com · LinkedIn

125K+

social posts processed / day

< 15s

average extraction time

2.5+ yrs

building production backends

// experience

Where I've shipped

Oct 2025 — Now

Malang, East Java

Backend Engineer

PT Teknologi Optimasi Indonesia (optimasi.ai) · Social media and news monitoring platform

  • Built a distributed residential proxy network in Go with multiplexed reverse tunnelling (Smux) over persistent TCP, so it gets past NAT and firewalls without opening inbound ports.
  • Built a central proxy gateway with round-robin and sticky-session load balancing, bandwidth tracking, anti-SSRF filtering and audit telemetry in PostgreSQL.
  • Designed horizontally scaled extraction workers (Node.js, BullMQ, Playwright) that process 125K+ posts a day, with average response under 15s thanks to GraphQL network interception.
  • Built MongoDB → Elasticsearch sync with backpressure and micro-batching, plus LLM-based sentiment analysis and daily executive summaries.

Go · Smux · Node.js · BullMQ · Playwright · Elasticsearch · MongoDB · PostgreSQL · LLM

Nov 2024 — Jul 2025

Project-based

Full Stack Developer (Go)

Applicant Tracking System · Production-ready microservices

  • Built a RESTful API in Go (GORM) following the Standard Go Project Layout.
  • Reduced database latency with distributed Redis caching on high-traffic endpoints.
  • Set up SQL Server Always On Availability Groups for replication and automatic failover, and tuned queries using execution plans and indexing.
  • Ran Docker Swarm across a multi-host cluster with automated GitHub Actions CI/CD.

Go · GORM · Redis · SQL Server · Docker Swarm · GitHub Actions

Feb — Jun 2024

West Jakarta

HC Database & Backend Programmer (Intern)

PT Erajaya Swasembada Tbk · Internal HR Applicant Tracking System

  • Redesigned the SQL Server relational schema from ERD analysis to support the recruitment workflow.
  • Built REST endpoints with Next.js route handlers and Prisma ORM, with master-data integrity rules.
  • Automated candidate sign-up with third-party OCR for CV extraction and LinkedIn 3-legged OAuth.
  • Delivered the end-to-end hiring flow: screening, online assessments, interview scheduling, offer letters and talent pool.

SQL Server · Next.js · Prisma · OCR · OAuth 2.0

// featured systems

Things I've engineered

Distributed Residential Proxy Network
Portable Go proxy nodes connect back to the gateway over multiplexed reverse tunnels, so they work behind any NAT or firewall without opening an inbound port.
Central Proxy Gateway
Round-robin and sticky sessions, bandwidth metering, anti-SSRF filters and audit telemetry in PostgreSQL.
Social Media Extraction Workers
Horizontally scaled Node.js, BullMQ and Playwright workers with GraphQL interception, fingerprint spoofing and residential IP rotation.
MongoDB → Elasticsearch Sync & LLM Insights
Micro-batching with backpressure keeps memory use flat. Elasticsearch aggregations drive trend analytics, and an LLM produces sentiment scores and daily executive news summaries.
High-Availability Applicant Tracking System
Go microservices with Redis caching, SQL Server Always On Availability Groups for automatic failover, and Docker Swarm deployments through GitHub Actions CI/CD.

// toolbox

What I work with

  • Go (Golang)
  • Python
  • Node.js
  • TypeScript
  • JavaScript

  • RESTful APIs
  • GraphQL
  • Distributed workers
  • Async queues
  • Backpressure & micro-batching
  • Reverse tunnelling (Smux)
  • Event-driven / Clean Arch
  • LLM integration

  • Elasticsearch
  • MongoDB
  • PostgreSQL
  • SQL Server (Always On)
  • Redis (caching)
  • Index & query tuning

  • Google Cloud (GCP)
  • Docker / Swarm
  • Kubernetes
  • RabbitMQ / BullMQ
  • GitHub Actions
  • GitLab CI
  • Linux / Debian

// education

D4 Informatics Engineering

Politeknik Negeri Jember, Sidoarjo campus

3.85/ 4.00 GPA
  • Publication: “Inovasi Hipnoterapi Berbasis Aplikasi”, JEECOM, vol. 4 no. 2 (2022)
  • Bronze Medal, National Applied Science Project Olympiad 2021

// certifications

Google Associate Cloud Engineer

Certified
  • Becoming a Google Cloud EngineerDicoding · 2023
  • Back-End Applications with Google CloudDicoding · 2023
  • The Bits and Bytes of Computer NetworkingCoursera · 2023
  • System Administration & IT InfrastructureCoursera · 2023

Let's build something
reliable together.

Open to backend, platform and data-engineering roles, remote or on-site in Indonesia.

fatkhurawe@gmail.comLinkedIn ↗GitHub ↗