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Julkarnine RokeyFull-stack engineer, DevOps lead and AI automation builder

Portrait of Julkarnine Rokey

I build the software your organisation runs on, and keep the servers under it running.

Examination ERPs for universities, a messaging SaaS, payment gateways, mobile apps and AI agents — designed, shipped and operated by one accountable engineer, from bare metal to the cloud.

Talk on WhatsApp
See 72 projects

Taking on new projectsDhaka, Bangladesh, working worldwide

Building since
2012
Projects here
0
Client countries
0
Systems I run today
all green
  • besends.comMessaging SaaSlive
  • exam-erpUniversity exam ERPlive
  • results-apiRust · Oraclelive
  • nilkhetexpress.comPrint commercelive
  • mail-platformInstitutional maillive
  • pve-clusterProxmox · Cephhealthy
  • backup-serverAutomated backupssynced
  • ai-agentsLocal + cloud LLMsonline
$docker compose ps

Systems I built are used every day by

  • Public universities

    Examination & results systems

  • Private universities

    ERP, payments & mail

  • Affiliated colleges

    Form fill-up & portals

  • Icon Marketing

    Commerce platform

  • BeSends

    Own SaaS

  • Freelance clients

    15 countries, 60+ projects

What I do

Most projects need a designer, a backend developer, a mobile developer and a sysadmin who talk to each other. I am all four, so nothing gets lost between them — and you have one person to call.

Get a quote

  • Web apps & SaaS

    From a first version to a paying product: multi-tenant SaaS, admin panels, customer portals, billing.

    Proof: BeSends, Paylume, Nilkhet Express

    • Next.js
    • React
    • NestJS
    • Laravel
    • Rust

  • University & enterprise ERP

    Exam, finance, HR and student systems that run an institution every day, with roles for every office.

    Proof: Public and private universities, affiliated colleges

    • Rust / Actix
    • Oracle
    • CodeIgniter
    • MySQL

  • Mobile apps

    React Native for iOS and Android, native Android when it matters, push and offline built in.

    Proof: Apps live on Google Play

    • React Native
    • Kotlin
    • FCM
    • Xcode

  • DevOps & infrastructure

    Bare metal, Proxmox, Raspberry Pi or cloud — I set it up, secure it, back it up and keep it online.

    Proof: Virtualisation clusters, bare-metal servers, AWS, DigitalOcean

    • Docker
    • Proxmox
    • Nginx
    • Cloudflare
    • Tailscale

  • AI agents & automation

    Agents that do real work over Telegram or WhatsApp, local models for private data, workflows that remove manual steps.

    Proof: Telegram agents, local LLM routing, n8n

    • Ollama
    • LiteLLM
    • MCP
    • n8n
    • Playwright

  • Payments & messaging

    bKash, SSLCommerz, Paddle, WhatsApp Cloud API, SMS and email — wired in correctly, with webhooks you can trust.

    Proof: bKash PGW driver, Paddle Billing driver

    • bKash
    • SSLCommerz
    • Paddle
    • Meta Cloud API

  • Rescue & modernise legacy systems

    Old PHP, slow SQL, hacked servers: I audit, clean, speed up and move them to a modern stack without losing a record.

    Proof: Report generation cut from 48 hours to 4

    • Audits
    • SQL tuning
    • PHP 5 → 8
    • Containers

Selected work

Six systems in production right now — for universities, a long-term commerce client and my own companies. The full catalogue follows below.

01 / 06Own product (PiTech) Live

BeSends — omnichannel messaging SaaS

A public SaaS that sends WhatsApp, SMS and email from one panel and one API — built, hosted, billed and operated end to end.

  • WhatsApp Cloud API across several Meta business accounts plus QR-linked devices, with capacity-aware routing that spreads traffic by each number's remaining daily limit
  • Compliance guard: opt-out list, 24-hour service window, template-only cold sends, automatic pause on Meta rate and quality signals
Enterprise-gradeRead the case study besends.com
02 / 06Private university, Bangladesh Live

Academic Services Portal — examination ERP

The university's examination ERP and public home page: thirteen student services and ten role-based portals on a Rust backend over Oracle.

  • Student services: exam form fill-up, results, transcripts, degree certificates, marksheets, attestation, re-evaluation, duplicate admit, fee payments
  • Ten portals — student, teacher, controller, dean, department, hall, college, accounts, library, administrator
Enterprise-gradeRead the case study
03 / 06Own business Live

Nilkhet Express — print & bookshop platform

Digitises Dhaka's Nilkhet print market: upload a file, get a price, and the print is delivered to your door — plus a live bookshop and a corporate desk.

  • Multi-mode ordering: upload, photo, link or describe; agent quotes on WhatsApp when there is no file
  • Corporate and university desk with loyalty tiers and monthly billing; first institutional client won
Enterprise-gradeRead the case study nilkhetexpress.com
04 / 06Private university, Bangladesh Live

Self-hosted university mail platform

Institutional email for the whole university on its own server — hundreds of mailboxes, branded webmail, OTP senders and delivery reporting.

  • SPF, DKIM, DMARC and reverse DNS aligned for inbox placement
  • Mail-flow collector and admin Reports with per-path caps, failures, live queue and CSV export
Enterprise-gradeRead the case study
05 / 06Institutional data centre In production

Proxmox VE cluster on Ceph

A two-node Proxmox VE production cluster with Ceph shared storage running about eighteen guests, including the firewall and database.

  • Found and fixed a cluster-wide stability fault, keeping production guests up
  • Firewall, database and application VMs on shared storage
Enterprise-gradeRead the case study
06 / 06Icon Marketing In production

ClickCart — network-commerce platform

A MERN commerce platform with member trees, matching income, wallets, top-ups and serialised inventory — built and deployed for a long-term client.

  • Binary placement tree, daily matching and conversion history with charts
  • Inventory by serial number with Code-128 sticker PDFs in A4 grid and label-roll modes
Enterprise-gradeRead the case study

The full catalogue

Filter by the kind of work you need. Complexity runs from focused builds to enterprise-grade systems with many users, roles, integrations and servers behind them.

Showing 12 of 72

Browse all as pages

DevOps, servers & databases

Physical Dell servers, a two-node Proxmox cluster with Ceph, a bare-metal backup server, edge devices and cloud fleets on AWS, DigitalOcean and VPS hosts. Your software is only as good as the machine it runs on.

Infrastructure topologyUsers reach Cloudflare at the edge, which routes to cloud servers on DigitalOcean, AWS and VPS hosts and to an on-premise Proxmox cluster and edge devices; these use Oracle, PostgreSQL, MySQL, MongoDB and Redis, with nightly backups to a separate backup server. Admins connect over a zero-trust network.Users & clientsweb · mobile · APICloudflare edgefirewall · CDN · DNSDigitalOceanapp & database serversAWSEC2 · S3 · managed servicesVPS fleetmail server · messaging SaaSProxmox VE + Cephon-premise clusterRaspberry Pi · NUCedge hosting · AI agentsOraclebackups · standby · DRPostgreSQL · MySQLper-app containersMongoDB · Rediscommerce · queues · cacheBackup serverautomated, off-hostAdmin accesszero-trust VPN

Swipe to see the whole diagram.

Hardware I look after

  • Proxmox VE cluster

    Bare metal · 2 nodes

    Shared storage and high availability for production apps and databases.

  • Backup server

    Bare metal · backup

    Automated, verified backups of every virtual machine, locked-down access.

  • Dell server station

    Bare metal · Linux

    Web stacks, hosting panels and legacy apps, out-of-band management.

  • Raspberry Pi 4B

    Edge · ARM64

    A dozen production sites, PostgreSQL, Redis, RabbitMQ and n8n on one board.

  • Intel NUC 11

    Edge · x86

    Always-on AI agents and local inference experiments.

  • Mac mini M2 / MacBook M5 Pro

    Build & AI

    iOS builds, scheduled automation, local LLMs with MLX and Ollama.

a normal Tuesday — ops log

Cloud & edge

AWS
EC2, S3 and managed services for client workloads
DigitalOcean
App and database servers on private networks
VPS hosting
Mail and messaging servers
Cloudflare
Workers, Tunnel, WAF, Email Routing, DNS for every domain
Tailscale
Zero-trust admin access to servers from any device
GitHub Actions
Build, test and zero-downtime deploys

Databases

Oracle
RMAN backups, standby databases, migration, recovery
PostgreSQL
Product databases and n8n
MySQL / MariaDB
92-database migrations, per-app containers
MongoDB
Commerce and content platforms, Atlas and self-hosted
Redis
Queues, caches, rate limits

Engineering standards on every job

  • Security first

    OWASP Top 10 mitigated at the infrastructure level, inputs sanitised, logs audited — no confirmed breaches on systems I run in 3+ years.

  • High availability

    99.97% uptime for result systems serving 40,000+ students through peak publication days.

  • Your data stays yours

    Private networks for databases and AI pipelines; backups you can restore; credentials and code handed over in your name.

  • Observability

    Monitoring and alerting across the stack, so slowdowns are caught before users notice them.

AI agents, local models & automation

I build agents that take a request in plain language, use real tools and report back — with local models for private data and cloud models only as a fallback. 13 projects in this portfolio use AI or automation.

  1. Local modelprivate, on your hardware
  2. Cloud modelused only on fallback
  3. Toolsshell · browser · APIs
  4. Telegram / WhatsAppwhere you talk to it

  • Agents that answer on Telegram and WhatsApp

    Always-on assistants that take a request, use tools and report back — and fall back to another model when one provider fails.

  • Private AI on your own hardware

    Local models sized to your machines, so sensitive data never leaves the building. Cloud models only where you allow them.

  • Computer-use and browser automation

    Agents that operate desktop apps and websites the way a person would, for the jobs no API covers.

  • Knowledge bases over your documents

    Retrieval-augmented search across thousands of contracts, policies or records — answers in plain language, data kept private.

Ops agent

online · Telegram

An illustration based on a real clean-up of one of my servers.

React Native, Android & iOS

13 mobile projects: React Native apps for iOS and Android with push and offline support, native Android apps published on Google Play, and the device-control APIs behind them.

University student app · React Native
  • University Student AppiOS · Android · React NativeIn development
  • ClickCart AdminiOS · Android · React NativeIn production
  • Nilkhet Express AdminAndroid · NativeOn Google Play
  • QuickScanAndroid · KotlinOn Google Play
  • Offline KeyboardAndroid · KotlinOn Google Play
  • Spam BlockerAndroid · KotlinOn Google Play
  • SMS GatewayAndroid · Go + AndroidLive
  • Manual Pro CameraAndroid · JavaIn development

About

Julkarnine Rokey

Julkarnine Rokey

Dhaka, Bangladesh

I have been writing code since 2012, when I started by editing Tumblr themes. Today I lead IT at a private university, engineer examination systems for a large public university, and run my own products: BeSends, Nilkhet Express and PiTech's Android apps.

I value discipline, long-term thinking and systems built with precision. I prefer performance, control and timeless quality over noise — which, for a client, means software that is still easy to change in five years and servers that don't wake anyone at 3 a.m.

  • Head of ITPrivate university, Bangladesh
  • Lead Infrastructure & Software EngineerPublic university, Bangladesh
  • AI Solutions Architect (consulting)Enterprise clients
  • FounderPiTech · BeSends · Nilkhet Express
Download CV (PDF)

The road so far

  1. 2012

    First code

    Started building for the web by hand-editing Tumblr themes — HTML, CSS and JavaScript.

  2. 2015

    Secondary School Certificate

    Kept shipping small sites alongside school.

  3. 2017–2023

    Senior full-stack engineer, freelance

    60+ projects for clients in 15 countries on Upwork and Fiverr, including the Naturo commerce platform and a HIPAA-compliant telehealth app. HSC in 2017; Dhaka became home base.

  4. 2021

    BBA, Business Administration

    Business degree — the reason I scope, price and explain work the way clients think about it.

  5. 2021–now

    Lead infrastructure & software engineer, public university

    Owner of the examination systems and the servers under them: 99.97% uptime for 40,000+ students, report generation cut from 48 hours to 4, Rust backends over Oracle.

  6. 2024–now

    AI solutions architect, consulting

    Retrieval and document-processing systems for logistics and legal clients — 10,000+ documents searchable in plain language, with data kept in private networks.

  7. Ongoing

    Founder — PiTech, Nilkhet Express, BeSends

    Building and running my own products: a messaging SaaS, a print-commerce platform, Android apps.

  8. 2026

    Head of IT, private university

    Exam ERP, payments, mail platform, cloud architecture and mobile app for the whole university.

  9. Now

    Studying law (LLB)

    Useful when contracts, data protection and compliance are part of the job.

Toolbox

Frontend

  • Next.js
  • React 19
  • TypeScript
  • Redux
  • Tailwind CSS
  • Motion
  • Vite

Backend

  • Rust / Actix Web
  • NestJS
  • Node.js
  • Express
  • Laravel
  • CodeIgniter
  • PHP
  • Go
  • Python

Mobile

  • React Native
  • Expo
  • Android / Kotlin
  • iOS / Xcode
  • FCM
  • APNs

Data

  • Oracle 21c
  • PostgreSQL
  • MySQL / MariaDB
  • MongoDB
  • Redis
  • Meilisearch
  • Prisma

Infrastructure

  • Proxmox VE
  • Ceph
  • Docker
  • Nginx
  • PM2
  • systemd
  • GitHub Actions

Cloud & edge

  • AWS (EC2, S3)
  • DigitalOcean
  • Hostinger VPS
  • Cloudflare Workers
  • Cloudflare Tunnel
  • Tailscale
  • cPanel / WHM
  • Heroku

AI

  • RAG pipelines
  • LangChain
  • Pinecone
  • OpenAI API
  • Hugging Face
  • LLM fine-tuning
  • Ollama
  • LiteLLM
  • MLX
  • MCP
  • n8n

Messaging & pay

  • WhatsApp Cloud API
  • WebRTC
  • Socket.io
  • Postfix
  • Mailcow
  • bKash
  • SSLCommerz
  • Paddle
  • Stripe Connect

How we would work together

  1. 1

    Discovery call

    We talk through the goal, users, deadline and budget. You get honest advice — including when you don't need custom software.

  2. 2

    Scope & architecture

    A written plan: features, data model, stack, hosting and a fixed estimate or milestone plan. Nothing is built before you approve it.

  3. 3

    Build in reviewed phases

    Working software every phase, on a staging link you can click. Your feedback shapes the next phase.

  4. 4

    Launch with a safety net

    Production deploy with backups, monitoring and a rollback path. SEO, analytics and security headers set up properly.

  5. 5

    Run & improve

    Optional monthly care: updates, uptime, security patches and new features as you grow.

Ways to hire me

  • Fixed-scope project

    A defined product or feature, priced up front, delivered in milestones.

    Good for: MVPs, websites, mobile apps, integrations

  • Monthly retainer

    A set number of hours each month for development, DevOps and support.

    Good for: Growing products, servers that must stay up

  • Technical partner

    Ongoing ownership of your technology — architecture, hiring help, delivery.

    Good for: Founders without a CTO, institutions

Questions clients ask

  • Yes. I work remotely in English on Asia/Dhaka time and overlap comfortably with Europe, the Gulf and Asia-Pacific. Communication is on WhatsApp, email or video call.

Start a project

Send a few lines about the goal, the deadline and the budget. You'll get honest advice and a written plan — the quickest way is WhatsApp.

WhatsApp — fastest reply+880 1719 679996
hello@julkarnine.com
julkarninerokey@gmail.com
Asia/Dhaka (UTC+6)

Project brief

Takes two minutes. Goes straight to my inbox.

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