Backend systems
APIs, data models, queues and integrations that stay up when traffic spikes and networks drop.
Work with me
I'm Saad Baig, saadnado online. I build backends and full-stack web applications for people who need something that keeps working after launch. Six years, freelance and contract.
Client work
Six years, freelance and contract
Client work · 2024 — present
AOne POS
A cloud POS platform with six apps on one backend: tablet and mobile registers, a web back office, per-store online shops and an admin panel. Offline-first sales, EMV payments and built-in tax compliance. I lead the team and built the backend and most of the apps.
Node.jsExpressMongoDBSocket.IONext.jsReactReact NativeExpoTypeScript
Client work · 2026
Paw Clinic
Practice software made for veterinary dentistry: calendar, bookings, payments and memberships, a tooth-by-tooth dental chart, a pet-owner portal, online booking and a native staff app. I built it end to end and shape the product with the client as a partner.
Next.jsReactTypeScriptPostgreSQLPrismaReact NativeExpoStripe
Client work · 2025 — 2026
Kololo
A two-sided marketplace for planning events: hosts find suppliers, negotiate quotes and manage guests, invitations and seating; suppliers manage requests and their profile. I built the original product end to end, from the database to the admin panel.
Next.jsReactTypeScriptPostgreSQLPrismaAWS S3Gemini
Client work · 2026
Halley
A multi-tenant platform that gives every damaged or rented car a shareable folder of photos, documents and signatures. I led the rebuild from an older Laravel and Flutter system: the data model, most of the TypeScript API, the web app and the admin panel.
TypeScriptNode.jsExpressPostgreSQLPrismaNext.jsReactAWS S3
Client work · 2025 — 2026
BitX
A cryptocurrency exchange built from scratch: a matching engine on serializable transactions, futures and binary options, live Binance market data over WebSockets, CoinPayments deposits, KYC and a full admin back office. I designed and built nearly all of it.
Node.jsTypeScriptExpressPostgreSQLPrismaRedisSocket.IONext.jsReact
Client work · 2025 — 2026
Inspecta
A reporting platform for building inspectors: firms design their own report templates, inspectors log findings on site, and signed, branded PDFs are generated automatically. I built the web app and the backend's sign-in, signing and PDF pieces.
Next.jsReactTypeScriptNode.jsExpressPostgreSQLPrismaPuppeteerAWS S3
Client work · 2026
Olle
A housing platform that matches people moving abroad with rental projects by language, community and budget, and lets them reserve a unit before they land. I built the first version end to end: the API, the public site, and the admin and super-admin panels.
Next.jsReactTypeScriptPostgreSQLPrismaAWS S3Google Maps
Client work · 2024 — 2025
Docufy
A portal where an accounting office requests documents from its clients, collects them month by month and has every invoice and receipt read automatically. I built it alone, the web app and the API.
Next.jsReactSassNode.jsExpressMongoDBMongooseDocuPandaAWS S3
Client work · 2024
AI Docs
A document analyser for law offices: clients, cases and contracts in one place, an eleven-step pipeline that turns an uploaded contract into a clause-by-clause review, and a chat for follow-up questions. I built it alone, from the database to the interface.
Next.jsReactTailwind CSSNode.jsExpressMongoDBMongooseOpenAIDocuPandaAWS S3
Client work · 2024
WAPI
A subscription service that gives an online store its own WhatsApp sender: sign-up by SMS code, plans and card billing with automatic renewal, a QR code to link a phone, and an API the store plugin calls with a license key. I built the backend alone and the customer dashboard.
Node.jsExpressMongoDBMongooseNext.jsReactMaterial UInode-cron
Client work · 2022 — 2024
Tor Digital
Tor Digital lets studios, trainers and clinics take appointments online. I did the frontend part: the business admin with its calendar, clients, hours, coupons and gift cards, the booking site clients use, and the sign-up flow for new businesses.
ReactReact RouterSassAxiosreact-big-calendarApexChartsdate-fnsExpressMongoDB
Client work · 2024
B Part
An e-commerce store for car parts and accessories, with search by plate number or by make, model and year, card payments with invoices, SMS and email updates, and an admin panel for the catalogue, orders and store content. I built all of it: both apps, the API, and the Prisma and PostgreSQL database behind them.
Next.jsReactPrismaPostgreSQLZodSCSSMaterial UIAWS S3
Client work · 2025
Nathan
A case management system for a rehabilitation programme: referrals, candidates, mentors, placements, work diaries, documents, payroll and billing. I was one of the developers on the team and built the candidate pages, the mentor module, the work diary and the form template editor.
Next.jsReactTypeScripttRPCPostgreSQLPrismaTailwind CSS
Client work · 2024 — 2025
Wave Smart Flow Nursing
A multi-tenant system for home-care agencies that place live-in caregivers: client and caregiver files, matching, permits and visas, home visits, payments and reports. I was one of the developers on the team: I wrote the first version and built most of the core modules.
Next.jsReactNode.jsPostgreSQLPrismaTailwind CSSAWS S3
Client work · 2024 — 2025
Wave Smart Flow
A large multi-tenant HR and operations platform for companies that place construction workers on building sites. I was one of the developers on the team, on both backend and frontend: I wrote the first version of the codebase and built the worker, housing, hours, invoicing and inventory modules.
Next.jsReactNode.jsPostgreSQLPrismaTailwind CSS
Client work · 2023 — 2024
Get Part
A marketplace that sends a customer's part request to every supplier who carries that make and collects their prices. I worked on the frontend for a year and a half, mostly the supplier side: the request inbox, the archive, make assignment and the admin's request views.
ReactReact RouterSCSSAxios
Client work · 2023 — 2024
Pickapp
A marketplace that matches transport jobs with drivers by region, vehicle and date. I built the frontend of the driver web app and the admin panel: the dashboard, trip diary, earnings and invoices for drivers, and the approval, assignment and payment tools for the team.
Next.jsReactMaterial UISassChart.jsAxios
Client work · 2024
Copaste
The super admin panel for Copaste, an app where brands open campaigns and creators send proposals to post for them. I set up the panel and built most of its screens: campaigns and their targeting, proposals, users, the feed, content pages and payouts.
Next.jsReactMaterial UIAxios
Client work · 2024
Cootle
An early-stage product for defining and tracking the value of design work in a company. I built the backend alone, shared the web app with another developer, and set up the landing page the other developer built. The project stopped after sign-in and the company profile.
Node.jsExpressMongoDBMongooseJoiNext.jsReactSassTailwind CSS
Client work · 2022 — 2023
NFSea
NFSea.tools tracked trending NFT collections, live mints, upcoming drops and price history, with wallet sign-in and paid membership. I built the frontend in Next.js against another team's GraphQL API. The startup closed; the screenshots run my frontend on mocked data.
Next.jsReactApollo ClientGraphQLethers.jsRechartsSassDocker
Client work · 2022 — 2023
Biguard
An admin panel and a public sign-up form for a service that protects customers' social media accounts. I built both frontends: customers, sign-up requests, virtual numbers for recovery codes, reports, push notifications and a real-time chat.
ReactReact RouterSassSocket.IOAxios
Client work · 2023 — 2025
Portfolio (2023)
My 2023 portfolio and blog: a single long home page with work, skills, resume and contact, project and blog pages fed by Contentful, and a lot of small motion. I designed and built it myself.
Next.jsReactSassContentfulSwiperdate-fns
Client work · 2022
Eternal
An admin panel where a team reviews artists' NFT submissions, approves them by pinning the artwork and its metadata to IPFS for minting on Solana, and manages users, access and featured pieces. I built the whole frontend. The project stopped before release.
ReactReact RouterSassAxiosIPFS (Pinata)Solana
Client work · 2021
Yusuf Hassan
A CMS-driven personal site with essays, a chat-style About page, a custom music player and password-locked case studies. I built it on my own, from the content model to the deploy pipeline.
ReactReact RouterContentfulMailchimpCSS ModulesFirebase HostingGitHub Actions
Client work · 2022 — 2023
Ben-Gurion Museum
A booking page where visitors to the Ben-Gurion barracks pick an attraction, a time slot and their tickets, and an admin panel where staff run orders, opening hours, prices, closing days and coupons. I built the frontend of both apps.
ReactReact RouterSassdate-fns
Client work · 2022
School Ace
A school canteen ordering system with an admin for the canteen and an app for parents to order recess and lunch for each child. I built the UI of both apps.
ReactReact RouterAnt DesignSassReact Calendar
Client work · 2022
Ethibe
The pre-launch website for Ethibe, a finance app where each community sets its own rules for saving, lending and learning about money. I built it on my own in React: the home page, the communities pages and an early access flow that collects interest without a backend.
ReactReact RouterSassFirebase Hosting
Client work · 2022
Healthy Preschools
An admin app for preschools: a daily check-in board with allergies flagged, messages and reminders to parents, a profile for every child, and school, classroom and staff settings. I built the UI.
ReactReact RouterReduxReactstrapMaterial UISass
Client work · 2023
Alternatively Worldwide
A five-page marketing site for a remote design collective. I set up the Next.js project and built the shared layout, the header, the home hero, the subscribe block and the footer, working with one other developer who built most of the inner pages.
Next.jsReactCSS Modules
Client work · 2022
Youni
The marketing site for Youni, an app that brings Oxford societies, events and tickets into one place. I built it on my own in React: five pages, two carousels, separate pages for organisers and students, a contact form and a full mobile layout.
ReactReact RouterSassreact-slick
Client work · 2023
Physium
A landing page for a physiotherapy clinic's shock wave treatment. I built it on my own in plain HTML, CSS and JavaScript, with two lead forms, a small PHP mail handler, video and team carousels, and a separate mobile layout.
HTMLCSSJavaScriptSwiperPHP
Client work · 2022
Happy & Love Studio
A three-page site for a product studio: oversized type, a grain texture, tactile CSS buttons and a full-screen mobile menu. I built it on my own and shipped it as a static export.
Next.jsReactSassFirebase Hosting
Client work · 2023
Old Kent Mosque
A single donation page for a mosque redevelopment appeal: a donation card with one-off and monthly giving, preset amounts, and every other way to give laid out clearly. I built it on my own in two days.
ReactReact RouterSass
Client work · 2023
Princess Sherifat Travels & Tours
A one-page site that sells a travel agency's Umrah packages and heritage tours: a lead offer in the hero, tour cards with live sale countdowns, and booking and WhatsApp buttons. The agency runs every offer from Contentful. I built it on my own in about two weeks.
Next.jsReactSassContentfuldate-fns
What I do
Full-stack web apps
From an empty repository to a deployed product: interface, backend, infrastructure and handover.
Rescue and refactor
Inheriting a codebase nobody wants to touch, making it safe to change, and documenting it.
How it works
STEP 1
Call
Thirty minutes on the problem, not the technology. I tell you honestly if I am the wrong person.
STEP 2
Scope
A written plan: what is included, what is not, what it costs, when it lands.
STEP 3
Build
Weekly demos of working software. You see progress, not status reports.
STEP 4
Handover
Documentation, a walkthrough recording, and thirty days of support after launch.
What clients say
“Saad is an exceptional front-end developer. He is a perfect guy if you need him to bootstrap your idea in a very limited time. He has full command over all major frontend toolings such as React, NextJs etc. He is very humble, down-to-earth, and passionate about his work. I found him punctual, a great listener, and overall a great person to work with.”
“Saad is a great developer. I can say he is one of the best seller amongst the freelancers have worked with on here. He is capable, supportive, honest, patient and hard working developer. He explained his process, worked diligently, provided various solutions, and completed work efficiently. The final product exceeded my expectations. I enjoyed working with Saad and will most definitely work again with him again, now and in the future.”
“Saad is a great developer and an awesome person. Delivered more than I asked for. Highly recommended.”
“Saad is one of the best developers I have found on Upwork. Techy guy with strong knowledge of all technologies and frameworks. His communication was top-notch, he met all deadlines, and his skills were reasonably strong. At one point I asked for an additional milestone and he was very forthcoming that the additional work was outside his area of expertise. would definitely work with him again.”
“Freelancer did beautiful design work. quickly, accurately and with great quality code. It was a pleasure working with him. I highly recommend him and hope to work with him again soon! Thank you for your awesome contributions to our team!”
“Thanks Saad. As always he came through for me. He is very excellent with his job. Best on here. Saad is very focused, detail oriented, and will make sure that everything is done well and better that you expected. His communication is best in class and an expert in his field. Thanks again.”
“Saad is an awesome developer. He is highly skilled and very professional. He responds to messages quickly and comes up with great solutions. I enjoyed working with him and I would be very happy to work with him again.”