Atanu Biswas,/Software Development & Technology Consulting.Your business needs the right technology. I help you build it.
I'm Atanu Biswas, a software developer and technology consultant with 15+ years of experience. I help you decide what your business actually needs, then build it — from automating operations to turning technical ideas into working products.
custom software for your business; business websites & online stores; AI into the tools you already use; automation that gives you your time back; integrations that connect your systems; upgrades for the apps you already run.|
15+ years of experience
8,000+ businesses served by platforms I helped build
Custom software & SaaS
AI & business automation
About
More than development.A practical technology partner.
I'm Atanu. I've worked inside engineering teams on government platforms in Northern Ireland and Denmark, built business software for clients, and designed, built and run SaaS products of my own.
That range shapes how I work: I plan beyond the first release, for how your software will be hosted, secured, maintained and extended once people depend on it.
I combine
hands-on
engineering experience with a practical understanding of business requirements. That means I don't simply take instructions and write code. I help identify the actual problem, evaluate possible solutions and build technology that makes sense for the business.
01
Engineering Experience
Architecture, backend development and production support for software that people use every day.
02
Business Understanding
Turning business requirements into maintainable,
cost-effective
software — and recommending the simpler option when it will do the job.
03
Direct Collaboration
You talk directly to the person who understands, designs and builds your software, with no account manager or
hand-off
in between.
Well-built software is cheaper to run, change and secure. These are the areas I handle myself, from application architecture and AI to servers, databases and security.
Application Architecture & Development
Laravel and PHP applications with a clear architecture and tested code — business applications, SaaS platforms, e-commerce systems and websites that bring in leads — from experience in engineering teams of 3 to 100+ people.
AI features that solve a defined problem in your product or operations: chatbots that answer from your own knowledge base, recommendation engines, and agents that take routine work off your team.
OpenAI API
AI-powered applications
Retrieval-Augmented Generation (RAG)
Knowledge-base chatbots
AI agents and workflow automation
MCP integrations
LlamaIndex and LangChain
Tools & technologies
8
OpenAI API · LlamaIndex · LangChain · RAG / knowledge bases · AI agents · MCP · Ollama · pgvector
Automation & Data Processing
Your existing tools connected and repetitive work automated — APIs and payment gateways, WhatsApp, browser automation, data processing, and analytics and tracking you can act on.
Third-party API integrations
Workflow automation
Browser automation
WhatsApp integrations
Data extraction and processing
Business process automation
Tools & technologies
5
REST APIs · Python · Node.js · Bash · MCP
Infrastructure & DevOps
Servers and hosting set up, deployed, monitored and maintained on infrastructure sized to your needs — from a single VPS to AWS.
Data models and queries that stay fast as your data grows — profiling, indexing and the right engine for each job. On a production platform, SQL and index work cut query time by 40%.
Applications built and reviewed against OWASP practices, on hardened servers — and experience responding to real security incidents, from SQL injection to malware.
I build with modern AI development tools and agent workflows — Claude Code, Codex and Gemini CLI, connected to project tools over MCP. They make the engineering itself faster and more thorough: code analysis, debugging, documentation, testing and automation.
Claude Code
Codex
Gemini CLI
MCP
Code analysis
Agents read and map large codebases, so every change starts from a clear picture of the existing system.
Debugging & testing
AI-assistedroot-cause analysis, refactoring and test writing.
Review & documentation
Automated review for security, maintainability and project conventions, and documentation that keeps pace with the code.
Workflow automation
Agents connected over MCP manage issues, research and release steps.
Building with AI tools does not make a product AI-powered. AI features inside your product are a separate decision, made only where they solve a real problem — see AI Engineering above.
Experience
Engineering experience across government, enterprise and SaaS
15+ years of production software — in engineering teams of 3 to 100+, and on my own.
Employment history
2014 — Present
NetTrackers
Kolkata, India
Senior Laravel Developer
businesses served by platforms I helped build
8,000+
database query time cut
40%
requests per second in production
40+
developers mentored
14
engineers in the teams I worked in
12 → 100+
Lead development and maintenance of PHP applications on Laravel, MySQL and PostgreSQL, delivering government and enterprise platforms serving 8,000+ businesses in teams of 12 to 100+.
Architect and consume REST APIs — streaming APIs, Google APIs and payment gateways — sustaining 40+ requests per second in production.
Cut database query time by 40% through SQL and index optimisation, query refactoring and profiling across core modules.
Run production deployment across three hosting environments and six AWS services (EC2, Lambda, S3, SES, SNS, CloudWatch), with Linux hardening and SSL.
Mentor 14 developers and review 8–12 pull requests a day, raising security and performance standards across project teams.
Handle security and incident response — SQL injection, XSS, file-upload flaws, brute force, malware and backdoors — with OWASP ZAP and manual review.
2013 — 2014
Techbridge
Kolkata, India
PHP Web Developer
Delivered ten client projects in custom PHP and MySQL, including two large platforms for clients in Thailand.
Debugged and extended existing client websites and internal tools.
Shipped responsive, SEO-optimised sites and six custom WordPress builds alongside designers and project managers.
2011 — 2013
Self-employed
Kolkata, India
Freelance Web Developer
Built eight dynamic websites for local clients and a startup team using PHP, MySQL and JavaScript.
Owned delivery end to end: UI implementation, database design, server configuration and deployment.
Developed custom WordPress themes and plugins, and recovered compromised sites through malware analysis, code review and server hardening.
Education
Bachelor of Science (B.Sc.)
Bangabasi College, Calcutta University · 2001–2004
Higher Secondary (10+2)
M.K.K.G.C. Institute, West Bengal Council · 2001
Languages
English — Professional
Hindi — Fluent
Bengali — Native
Case studies
Selected projects
Government platforms I worked on within an engineering team, and AI and business software I built myself — every case study says whose project it was and what my part was.
Government · business networking and support
Enterprise Northern Ireland
Employer project · team work
Lead Developer
Team of 12
Northern Ireland Government, via NetTrackers
The challenge
One platform where a business community of 8,000+ offers and receives support — appointments, events, opportunities and guides — with AI recommendations built in.
The team
Built and maintained for the Northern Ireland Government by a NetTrackers team of 12.
My role
Lead Developer in the team, working on the platform’s Laravel/PHP application.
Technical approach
A Laravel/PHP application with MySQL, running on AWS — servers, functions, storage, email and notifications as managed services. Its recommendations come from OpenAI and pgvector, a database extension that finds the closest matches by meaning rather than by exact words.
Outcome
8,000+businesses served
An AI recommendation engine in the platform
Government · public transport
R2P Denmark — bus tracking
Employer project · team work
Senior PHP Developer
Team of 100+
Danish Government, via NetTrackers
The challenge
Collect live data from the onboard units of about 80 buses — speed, braking, passenger count and stop duration — and handle dynamic rerouting requests during live operations.
The team
Built for the Danish Government by a team of 100+ through NetTrackers, integrating Movia and a map-tile server.
My role
Senior PHP Developer in the team, working on the system’s Laravel/PHP application.
Technical approach
Each bus’s onboard unit sends its readings to the R2P server. Behind it, a Laravel/PHP application with MySQL works alongside Python, Elasticsearch (search over large data) and Twilio (messaging), on AWS and a self-hosted server, and connects to Movia and a map-tile server so rerouting requests are handled during live operations.
Outcome
~80buses streaming live telematics
Real-time data feeding live rerouting
AI application development
Docent — AI Knowledge Base
My own product
For businesses whose know-how is spread across documents, spreadsheets, websites and databases.
The challenge
Business information stored in documents is difficult to search, access and use when it is needed.
My role
Founder and developer: I designed, built and run it as part of DriveBird, my own platform.
What I implemented
I built a Python-based system that reads PDFs, Office files, spreadsheets, web pages, S3 buckets, databases and photographed paper pages, keeps them searchable, and answers questions through an AI chat interface.
Technical approach
Every source, photographed pages included, is read into searchable text, and the AI chat answers from what that search finds — which is what lets every answer show where it came from.
Outcome
Scattered documents became answers a team can trust: every reply cites its sources, and each person sees only the collections they are allowed to.
Business software · Healthcare
Clinic & Pharmacy Management
Independent project
Built for a therapy business running several locations; the same multi-branch design now runs DriveBird Pharma for medical shops and chemists.
The challenge
Managing patients, staff, stock and billing across several branches is complex — and one expired medicine sold at a busy counter costs a licence and a customer’s health.
My role
I designed and built it for the client; the same design now runs DriveBird Pharma, which I run.
What I implemented
I built multi-branch software with patient records and treatment history, batch-and-expiry stock that blocks expired medicine at billing, fast GST billing, dues tracking, staff logins scoped to each job, and SMS and email notifications.
Technical approach
One central system serves every branch instead of a copy per branch, and the expiry check sits inside billing — the point where an expired medicine would otherwise reach a customer.
Outcome
Owners see every branch from one account, counters bill faster, records stay accurate, and expired stock can no longer reach a customer.
DriveBird and Deal84 — the SaaS and e-commerce platforms I own and run — are in Products further down.
See my products
More projects
AI application development
ENI — AI-Powered Business Assistant
Employer project · team work
An assistant inside a business platform that answers questions from its data and takes on repetitive tasks.
Users had to search the platform’s data by hand and complete repetitive tasks themselves.
As part of the NetTrackers team, I built an AI-driven system in Python that understands what a user is asking, retrieves the relevant data, and automates actions such as filling in forms from user profiles.
Less manual effort and faster answers inside the platform.
AI application · Customer support
Deskbell — AI Support System
My own product
One shared inbox for every customer email, with an AI that answers only from the business’s published help articles.
Handling support emails by hand is slow and leads to delayed, inconsistent answers.
I built a support inbox that keeps every reply in the right conversation, filters spam, creates tickets, and drafts AI answers only from published articles — prices, dates and rules must match word for word, or it hands over to a person.
Faster, consistent support customers can trust — sources under every answer, a person always one click away, and billing only for proven answers.
AI product · Website chatbot
MeBot
My own product
For small businesses whose website visitors ask questions while the owner is busy or offline.
Interested visitors whose questions arrive after hours never get an answer.
I built a one-line embeddable chatbot that learns the business through AI-assisted knowledge suggestions, answers instantly from approved knowledge, and collects names, emails and phone numbers with the conversation.
Every visitor gets an answer and every interested one becomes a lead in the owner’s inbox — starting free with 10 replies a day.
AI product · Paper trading of NSE stocks
Fintrix
My own product
For anyone weighing a trading strategy who wants its real record — losing trades included — before a single rupee is risked.
Trading tips rarely show their losing trades, so it is hard to judge any strategy honestly.
I built an AI that checks a watchlist of up to 50 NSE stocks every 15 minutes in market hours, paper-buys with a target, a stop-loss and a size, sells when the trade is done, and records why — with pretend money only.
An honest record: every paper trade counts estimated brokerage, taxes and fees, and is set against NIFTY 50 over the same days.
Community platform · Matchmaking
Vaishnava Matrimony
Independent project
A matrimony platform made for the Vaishnava community.
Community members had no focused, reliable platform for finding suitable matches.
I developed the full platform: profile creation, search filters, match discovery and secure communication.
A simpler matchmaking process and efficient partner discovery within the community.
SaaS · Team & project management
Issue Tracker
My own product
For remote teams that need tasks, time and billing in one place — without the weight of traditional tools.
Remote teams struggle to track tasks, manage communication and monitor time and billing in one place.
I built a project-based issue tracker with task management, time tracking, billing calculation, automatic worker payouts and real-time notifications.
Better team coordination, transparent billing and faster issue resolution, with minimal setup and cost.
SaaS · Online booking & deposits
Daybook
My own product
For appointment-based businesses, with deposits paid straight into the business’s own payment account — DriveBird takes no cut.
No-shows cost appointment businesses money, and most booking links give one side all the power and the other side an email.
I built booking pages where both sides can cancel or move an appointment fairly, deposits go to the business’s own account, and every appointment keeps a plain-language history either side can export.
Fewer no-shows, money paid upfront to the business, and one shared record both sides trust — with 20 free bookings a day.
Infrastructure · File storage & delivery
Asset Hosting
My own product
For websites and applications that store and serve images, documents, audio and video — DriveBird Assets.
Web hosting charges a premium per gigabyte, and accepting file uploads is one of the riskiest things a website does.
I built an API-first asset service: one upload call returns the final CDN URL, 38 file types up to 200 MB each, and named buckets so one account can serve several sites without their files mixing.
Lighter, safer websites whose files load fast everywhere — year-long CDN caching, unlimited downloads, billed by the day from a prepaid wallet.
E-commerce · Price tracking & deal discovery
DriveBird E-commerce & PriceTracker
My own product
Price tracking and deal discovery across several e-commerce stores — formerly Deal84, now part of DriveBird.
Online shoppers waste time checking prices by hand and often miss the best deals.
I built a system that tracks product prices, analyses price history and sends automated alerts when prices drop — and lets merchants list and promote their products.
Smarter purchase decisions from real-time deal insights, and an extra sales channel for merchants.
Business automation · E-commerce data
Amazon Seller Performance Intelligence
Independent project
For Amazon sellers who would otherwise review Seller Central reports by hand every day.
Reviewing metrics across many products by hand makes it hard to spot weak listings, stock risks or emerging product opportunities quickly.
I built an automated extraction and reporting system that collects sales trends, click-through rates, purchase behaviour, reviews, inventory levels and product performance from the seller portal into structured CSV reports.
Faster decisions, early detection of underperforming listings and quicker discovery of product opportunities.
Conversational automation
WhatsApp AI Assistant
Independent project
Lets people reach a business’s systems through WhatsApp messages instead of a separate app or portal.
Users prefer quick messaging, but had no direct access to business data and services from it.
I built a webhook-driven system that processes WhatsApp messages, works out what the user wants with AI, and reads or updates data in internal systems — with subscribe/unsubscribe management and event-based messages.
Real-time answers through a messaging app people already use.
Facing a similar problem in your business?
Tell me what is slowing you down — a manual process, systems that don’t talk to each other, or an idea for a product. I’ll explain how I would approach it and what it would involve.
Good software starts with understanding the problem. Every project follows the same steps, so you always know what has been agreed, what is being built and what comes next.
01
Understand
We discuss your business, requirements, existing challenges and desired outcome.
02
Define
I evaluate the requirements, recommend an appropriate technical approach and establish the project scope.
03
Plan
We agree on deliverables, priorities, timeline, responsibilities and commercial terms.
04
Build & Review
I develop the solution in manageable stages, share progress and collect feedback.
05
Launch & Support
I handle deployment, handover and agreed post-launch support.
What you can expect
Direct communication with the developer
Clear progress updates
Practical technical explanations
Agreed project scope and deliverables
Structured handover and documentation where applicable
Have a project in mind?
Let’s discuss what you’re trying to achieve and determine the right way to approach it.
Websites, custom software, AI and automation for your business
Whether you need a new product built, an existing system improved or repetitive work automated, I take it from first requirements to working software — and stay on to support it.
Business Websites & Online Presence
For businesses that need a professional online presence. Customers look you up before they get in touch, and an outdated or hard-to-update website makes the wrong first impression.
For businesses that need software tailored to their operations. Spreadsheets and off-the-shelf tools stop fitting once a business has its own way of working.
For businesses that want to reduce repetitive work and make better use of their information. Hours go into answering the same questions, copying data between systems and searching through documents.
For businesses using multiple tools that do not communicate properly. Orders, payments and customer details get typed again from one system into another — slowly, and with mistakes.
For businesses that already have software but need technical assistance. Bugs, slow pages and security worries build up — sometimes after the original developer has moved on.
Available alongside the services above, wherever a project needs them.
Hosting and email configuration
SEO and analytics setup
Data extraction and reporting
Whether it’s a new build or an existing system, describe the problem rather than the solution. I’ll outline the options and what each would involve before any development starts.
Alongside client and employer work, I design, build and run my own software products under DriveBird. Running them day to day means I deal with what comes after launch — hosting, security, updates, operations and product decisions — the same things your software will need.
Everything here is my own — designed, built and run by me. Several also appear in Selected projects above, told as the problem each one solves.
Featured products
My multi-product SaaS ecosystem
DriveBird
Owned & operated
Publicly available
What it is
A platform of business software — an AI website chatbot, online booking, a support desk, issue tracking and file hosting — alongside free utilities, all under one account.
What it’s for
Ready-made tools a small business can sign up for and use as they are, with nothing to install or maintain.
My role
Founder, lead developer and DevOps — a solo build: product, development, deployment and operations.
Scale
16 free business tools · 5 professional business tools
An API-first file service: one upload call returns the final CDN URL for images, documents, audio and video, and named buckets let one account serve several sites.
What it’s for
Takes heavy files and risky uploads off a website’s own server.
My role
Founder and developer — built and run solo, as part of DriveBird.
Excellent experience working with Atanu. His technical expertise, attention to detail, and timely delivery really set him apart. Highly recommended for web development and backend work.
A
Arka Karmakar
6 months ago
Atanu da helped me a lot when I was stuck with backend and deployment issues. He explains technical things in a simple way, so it becomes easier to understand and solve problems. I’ve seen that he has good experience in web development and knows how real systems work. He is supportive, skilled, and great to take guidance from.
S
Saheb Sharma
5 months ago
Atanu developed a smart automation tool specifically for my e-commerce export business, and it has genuinely made a huge difference. Earlier, many repetitive tasks had to be handled manually through staff, but now the entire process runs smoothly on its own.
It has saved me a significant amount of time as well as operational cost. What impressed me the most was Atanu’s knowledge, professionalism, and dedication towards understanding the actual business requirement instead of offering a generic solution that too in a budget friendly costing.
It’s rare to find someone who combines technical expertise with such sincerity and commitment. Truly grateful for his support and highly recommended for anyone looking to automate and streamline their business operations.
S
SNEHANGSU MANIK
6 months ago
We are using software developed by Atanu for managing our multiple clinics, and it has made daily work much smoother. Appointment flow, records, and coordination between branches became easier after implementation. Very responsive person and understands business requirement properly.
N
Nitesh Tech
6 months ago
Awesome experience! The code quality and security measures are the best I’ve seen. He handled everything from development to site hosting with perfect precision and delivered exactly on time. 10/10 knowledge and execution—will definitely hire again!
A focused 2-page summary of my work experience, key results and the core stack I build with. Best if you want the essentials in under a minute rather than the full history.
The complete profile: full technical skill set, project history and my AI & automation work from 15+ years of building software. Best if you want the depth behind the summary.
