Full-Stack City
Interfaces and the APIs behind them, built as one system — typed end to end, from the database schema to the pixel.
S. Afsan Rahmatullah — Full Stack & DevOps Engineer · AI Products
ch.00 — a blank page
Full Stack & DevOps Engineer · AI Products
$ afsan --role software_engineer --builds ai_products --from dhaka.bd --tz utc+6▌
graphite on paper · dhaka · 2026
scroll — you're holding the pencil
ch.01 origins — dhaka, bangladesh
Every system starts
as a rough line.
I'm Afsan — a full stack & DevOps engineer from Dhaka who ships AI products end to end: voice AI, support automation, retrieval systems, and the infrastructure underneath them.
At Spacesoft I lead a small team through the whole lifecycle — product discovery, architecture, build, deploy, and the 2 a.m. incident channel. The common thread: taking something that only exists as a sketch on a whiteboard and making it run in production.
b.sc computer science · brac university · cgpa 3.71/4.0 · 3.5+ yrs in production
fig. 01render: 100%
ch.02 the thesis · brac university · 2022
Where sketches learned
to become real.
My undergraduate research, “Generation of Realistic Images from Hand-Drawn Sketches Using Deep Learning,” trained a conditional GAN (TensorFlow 2.2) to look at a rough pencil sketch and render the photograph it wanted to be.
I never stopped doing this — I just started doing it with software.
ch.03 the craft — four worlds
The sketch grows layers.
The Pipeline
Containers ride the conveyor from commit to production: repeatable Docker builds, Nginx/Traefik gates with automatic HTTPS, and blue-green lanes swapping traffic with zero downtime.
Cloud Archipelago
Production AWS, owned from a blank account to a scaling system: compute, storage, CDN, managed databases, DNS, and the VPC wiring that keeps it all private.
AI Constellations
Retrieval pipelines drawn as star maps — documents embedded into vector space, RAG streams pulling the right light down into an answer, long-running work orchestrated so it survives restarts.
ch.04 the work — one continuous line
Ink on production.
Sep 2022 — Oct 2023
Full Stack Engineer
Miicon Software Solutions · Dhaka
50%
faster API responses
5
microservices, one gateway
- Built an automated trip-request system matching drivers to trips, lifting booking efficiency and customer satisfaction.
- Designed an API gateway for a multi-tenant platform — centralized routing, authentication and authorization across 5 microservices.
- Cut response time 50% on data-intensive requests with asyncio and multithreading; shipped an end-to-end recruitment-tracking backend.
Oct 2023 — Present
Software Engineer
Spacesoft.co · leading a small product team
~80%
CPU cut on hot endpoints
70%
faster integrations shipped
2
apps 0 → production on AWS
- Lead the team shipping AI products end to end — voice AI, customer-support automation, AI SEO/AEO/GEO — from discovery to launch.
- Took two large applications from zero to live production across self-managed servers and AWS; own the infra, CI/CD, and zero-downtime releases.
- Improved API performance and caching in production (~80% CPU reduction), streamlined three customer-facing Shopify apps, launched a GoHighLevel subscription & billing system, and mentor juniors through reviews and pairing.
ch.05 things shipped — chaos into order
Scattered sketches,
settled systems.
Apploye ↗Time tracking & workforce analytics
Fieldservicely ↗Field service management platform
FieldTask ↗Field team task orchestration
Skinsight AI ↗AI skincare recommendations
Simsendly ↗Messaging & outreach automation
Rankflo AI ↗AI SEO / AEO / GEO engine
Salestial AI ↗AI sales assistant
Phonevalidately ↗Phone validation for GoHighLevel
GroupBoss ↗Facebook group lead capture
…plus GoHighLevel marketplace apps, Chrome extensions and Shopify integrations — more on GitHub ↗
ch.06 own time — the bottom drawer
Sketches I keep
for myself.
~/projects $ ls -latotal 6
2024
skinsight ↗
AI skincare recommendations · Next.js · FastAPI · MongoDB · Docker
live
Reads a skin profile and builds a personalised routine around it — recommendation engine, product catalogue and the infra underneath, shipped to real users.
2026
gatekeeper ↗
Claude Code permission dashboard · Python · TUI
oss
A terminal dashboard that watches Claude Code permission prompts across every session — one pane to see them all and approve without hunting through tabs.
2025
mailermonk
Email deliverability monitoring · React · FastAPI · PostgreSQL
wip
Keeps a constant eye on inbox placement, DNS auth and blacklists — so a deliverability problem surfaces as an alert, not as a campaign that quietly went nowhere.
2025
prismdash
Analytics dashboard · Next.js · TypeScript · PostgreSQL
wip
One clean pane for product metrics — events, funnels and retention in a single view instead of five stitched-together tools.
2025
railsnap
Automated train booking · Chrome extension · Cloudflare Worker
active
Hunts train seats the moment booking opens — a Chrome extension drives the checkout flow while a Cloudflare Worker keeps watch on release windows.
2025
spendsense
Personal finance · React Native · WatermelonDB
wip
Offline-first money tracking that lives on the phone — budgets, trends and a monthly review that tells the truth about where it all went.
// drawn on nights & weekends — the drawer never really closes
ch.07 field notes — the sketchbook
Notes from the margin.
// latest from dev.to/writewithafsan
How I manage all my Claude Code sessions from a single terminal
field note · read on dev.to ↗
more notes → dev.to
// github — a year of commits: first as a garden, then as the data it grew from
2,869 contributions
23-day longest streak
109 best day
the page is no longer blank.
ch.08 the rendered world