AR Sahak — Full-Stack Developer & AI Engineer

Hello, I'm AR Sahak

Creative technologist

I blend thoughtful code, sharp analysis, and creative marketing to build digital experiences that do more than look good—they move people and businesses forward.

Explore my work Let's talk ↗

Local time · GMT+6

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Currently

Open to opportunities

Conceptual half portrait with the other half formed entirely from programming, technology, analytics, and marketing elements

One perspective

Human × Digital

What I do

BuildAnalyzeGrow

Insight led

01 / The person behind the code

AR Sahak wearing glasses and a dark suit

4+ years of experience

Jan 2024 — Present

Software Engineer

Bayshore Communication

Based in Dhaka, Bangladesh

About me.

From thoughtful interfaces to the systems that power them.

I'm AR Sahak, a full-stack developer with 4+ years of experience turning complex ideas into production-ready SaaS platforms, AI-powered applications, and Web3 products.

At Bayshore Communication, I lead full-stack delivery, design REST and GraphQL APIs, and build LLM-powered backends and AI chatbots. I work across React, Next.js, Node.js, and Python with FastAPI, taking features from the first interface through to deployment on AWS and DigitalOcean.

Before that, I built production web applications at IT Bangla Ltd. Today, I bring that hands-on experience to scalable architecture, code reviews, and mentoring engineers — with a focus on software that's reliable and easy to grow.

B.Sc. in Computer Science & Engineering

Jiangsu University of Science & Technology, China · 2018–2022

View résumé Get in touch

02 / What I bring to the table

My expertise.

The technologies and disciplines I bring together to build SaaS platforms and AI-powered applications — from intelligent assistants and computer vision to the infrastructure behind them.

01 / Frontend Development

Interfaces people enjoy using

Responsive interfaces for web and mobile, with thoughtful interactions and reliable state management.

Responsive frontend interfaces across desktop, tablet, and mobile screens

Capability 01

Interfaces people enjoy using

Frontend Development

Responsive interfaces for web and mobile, with thoughtful interactions and reliable state management.

Product interfaces for SaaS and web platforms
Responsive, mobile-first layouts for every screen
Cross-platform applications with React Native
Reusable components and scalable design systems
Complex client state and server-data caching
Accessible, animated and performance-focused UI

Core stack

React
Next.js
React Native
Expo
TypeScript
Tailwind CSS
Redux Toolkit
Framer Motion
Auth.js

Capability 02

The logic behind the scenes

Backend & APIs

Secure services, async APIs, and microservices that connect the interface to the business logic.

REST API architecture, documentation and versioning
GraphQL schemas, resolvers and data loading
Role-based access, JWT and OAuth authentication
Payments, webhooks and third-party integrations
Background jobs, queues and scheduled workflows
Testing, logging and performance optimization

Core stack

Node.js
Express.js
FastAPI
Django
REST API
GraphQL
Socket.IO
WebRTC
JWT
Microservices

Capability 03

AI that gives real answers

Generative AI & RAG

LLM-powered backends and intelligent chatbots that retrieve relevant knowledge and turn it into useful answers.

Knowledge assistants grounded in private documents
Document ingestion, chunking and semantic retrieval
Tool-using agents with memory and multi-step flows
Vector search with hybrid ranking and filtering
Evaluation, guardrails and hallucination control
Streaming responses, tracing and cost monitoring

Core stack

LangChain
LangGraph
RAG
Vector DB
Hugging Face
Qdrant
Prompt Engineering
Ollama
Embeddings
LLMs

Capability 04

Teaching machines to see

AI & Computer Vision

Computer vision and image processing in Python, from image classification and object detection to deep learning model training and evaluation.

Image classification, detection and segmentation
OCR and intelligent document processing
Dataset preparation, labeling and augmentation
Transfer learning and custom model fine-tuning
Benchmarking, error analysis and model evaluation
Optimized inference services for production

Core stack

Python
PyTorch
TensorFlow
OpenCV
NumPy
Scikit-learn
Jupyter
YOLO
Keras
ONNX

Capability 05

Data, organized and dependable

Databases & Data

Data models, database integrations, and caching that keep applications organized, responsive, and ready to grow.

Relational and document database architecture
Indexing, query tuning and performance profiling
High-speed caching and session management
ETL workflows and event-driven data processing
Search, reporting and analytics foundations
Safe migrations, backups and data integrity

Core stack

PostgreSQL
MongoDB
Redis
MySQL
Elasticsearch
Kafka
Supabase
SQLAlchemy
Prisma
Firebase

Capability 06

Shipped, monitored, and scaled

Cloud & DevOps

From containerized applications to cloud deployments, with automated delivery and infrastructure monitoring.

Containerized applications and cloud deployments
Automated CI/CD pipelines and release workflows
Infrastructure as code for repeatable environments
Kubernetes orchestration and service scaling
Monitoring, centralized logs and alerting
Reverse proxy, TLS and production hardening

Core stack

AWS
Docker
Kubernetes
GitHub Actions
Terraform
Nginx
Cloudflare
Prometheus
Grafana

Languages I work with

JavaScript · TypeScript · Python · C++ · Java

Quality built in

Jest · Cypress · Playwright · Code reviews · Web security

Have a project that brings these together?Let's build it.

Let's connect

03 / Ideas put into practice

Selected work.

A closer look at what I build. Explore the projects, the thinking behind them, and the technologies that bring each idea to life.

Explore the full project collection.

View all projects

04 / My way of working

From idea toevolution.

I learn enough to ask better questions, plan with the evidence I have, build in small steps, and use every release to improve the next.

LearnBuildMeasureRepeat

Phase 01

Discover

Turn curiosity and ambiguity into a problem worth solving.

Learn & explore
01
I study the official docs, real use cases, and core ideas, then build a small proof of concept to test what I learned.
Understand the problem
02
I clarify the users, business goal, constraints, and the outcome the product must create.
Research & analyse
03
I examine existing solutions, user flows, technical risks, and evidence before choosing a direction.

Phase 02

Create

Turn the plan into a reliable product through focused increments.

Plan the system
04
I map the user journey, architecture, data, APIs, security, and delivery milestones before development begins.
Build step by step
05
I ship the core flow first, then add features in small, testable increments with reusable and maintainable code.
Validate & launch
06
I test behavior, responsiveness, performance, security, and edge cases before a controlled production release.

Phase 03

Evolve

Use real-world signals to keep the product healthy and moving.

Observe real use
07
After launch, I watch product behavior, errors, performance, and user feedback to see what actually works.
Maintain & improve
08
I fix issues, optimize slow areas, reduce technical debt, and keep dependencies and infrastructure healthy.
Shape the next version
09
I turn the strongest insights into priorities, improvements, and a clearer plan for the next release.

Every release begins the next learning cycle.

Real use creates better evidence, and better evidence shapes a stronger next version.

Learn continuously

05 / Words from collaborators

Kind words.

A preview of how feedback from clients, collaborators, and teams can live here — with its original source and professional context.

Demo testimonial content

Fiverr

“He communicates technical decisions in a way that keeps everyone aligned. From planning through release, Sahak brought structure, calm thinking, and a strong sense of ownership to the project.”

Upwork

“Excellent work for all sake. Strong recommendations for MD Abdur Raof Sahak.”

Fiverr

“AR Sahak was very detailed in his approach and appeared to have one primary goal- that the delivery is fit for purpose and satisfactory to expected quality. I will be engaging him in other future related projects”

Office

“Sahak is one of the most dependable people on our team. He takes ownership well beyond his role, communicates clearly with stakeholders, and consistently ships work we can build the business around.”

Office

“I managed him directly at IT Bangla and he was consistently one of the most dependable developers on the team — professional, detail-oriented, and someone who took real ownership of his work. Excellent to work with.”

Office

“I worked with Sahak on the same development team and had the opportunity to see his work closely. He is a reliable software engineer who takes ownership and approaches problems with a practical mindset.”

Fiverr

“He communicates technical decisions in a way that keeps everyone aligned. From planning through release, Sahak brought structure, calm thinking, and a strong sense of ownership to the project.”

Upwork

“Excellent work for all sake. Strong recommendations for MD Abdur Raof Sahak.”

Fiverr

“AR Sahak was very detailed in his approach and appeared to have one primary goal- that the delivery is fit for purpose and satisfactory to expected quality. I will be engaging him in other future related projects”

Office

“Sahak is one of the most dependable people on our team. He takes ownership well beyond his role, communicates clearly with stakeholders, and consistently ships work we can build the business around.”

Office

“I managed him directly at IT Bangla and he was consistently one of the most dependable developers on the team — professional, detail-oriented, and someone who took real ownership of his work. Excellent to work with.”

Office

“I worked with Sahak on the same development team and had the opportunity to see his work closely. He is a reliable software engineer who takes ownership and approaches problems with a practical mindset.”

Office

“I worked with Sahak on the same team and had the opportunity to test an AI-powered SaaS project he developed. He has strong knowledge of AI, frontend and backend development, with a good understanding of system architecture.”

Fiverr

“Sahak designed a great website! It was delivered in a few days. Quick response! Im verry happy and will recomend to all of my friends. Thanks for the great work!”

Fiverr

“He brought focus to a project with many moving parts. The plan was practical, progress stayed visible, and each iteration improved both the product and the way our team worked with it.”

Fiverr

“This seller is an amazing website builder. He created a very good modern responsive website for my business. He was very patience, polite person. He followed all my instruction and presented to me my dream website. I highly recommend him to anyone who wants an honest, respectable professional like him.”

Upwork

“His strongest quality is the combination of deep technical skill and product thinking. He did not simply implement features; he helped us decide which features would create the most value.”

Office

“As CTO, I've led several projects alongside Sahak and seen how well he collaborates across teams. His backend work is clean and well documented, he anticipates edge cases early, and he keeps every project moving without friction.”

Office

“I worked with Sahak on the same team and had the opportunity to test an AI-powered SaaS project he developed. He has strong knowledge of AI, frontend and backend development, with a good understanding of system architecture.”

Fiverr

“Sahak designed a great website! It was delivered in a few days. Quick response! Im verry happy and will recomend to all of my friends. Thanks for the great work!”

Fiverr

“He brought focus to a project with many moving parts. The plan was practical, progress stayed visible, and each iteration improved both the product and the way our team worked with it.”

Fiverr

“This seller is an amazing website builder. He created a very good modern responsive website for my business. He was very patience, polite person. He followed all my instruction and presented to me my dream website. I highly recommend him to anyone who wants an honest, respectable professional like him.”

Upwork

“His strongest quality is the combination of deep technical skill and product thinking. He did not simply implement features; he helped us decide which features would create the most value.”

Office

“As CTO, I've led several projects alongside Sahak and seen how well he collaborates across teams. His backend work is clean and well documented, he anticipates edge cases early, and he keeps every project moving without friction.”

06 / Notes from the build

Thinking in public.

Practical notes on software, AI, architecture, and the lessons that emerge while turning complex ideas into useful products.

Longer articles, technical breakdowns, and useful observations from real projects and ongoing experiments.

View all insights

07 / Start a conversation

Have an idea?Let's build it.

Tell me what you are planning, improving, or still figuring out. I'll help turn the idea into a clear and practical next step.

Working hours aligned to Bangladesh time (GMT+6)
30+ hours available every week
Clear, responsive communication

Email directlyarsahakbd@gmail.com WhatsApp+880 1792-843207

Based in Dhaka, Bangladesh · Available worldwide

Project brief

Tell me about your project.

* Required

Ideas intodigital momentum.

About me.

My expertise.

Interfaces people enjoy using

Frontend Development

Backend & APIs

Generative AI & RAG

AI & Computer Vision

Databases & Data

Cloud & DevOps

Selected work.

From idea toevolution.

Discover

Learn & explore

Understand the problem

Research & analyse

Create

Plan the system

Build step by step

Validate & launch

Evolve

Observe real use

Maintain & improve

Shape the next version

Kind words.

Thinking in public.

Have an idea?Let's build it.

Tell me about your project.