Wedesign,build,andshipfull-stackweb&AIproducts.

PairStack builds websites and web platforms, AI solutions that integrate with an existing business, and websites with AI built into them. It also builds mobile and cross-platform applications, handles API and integration work, and runs social media for the businesses it builds for. Every project is delivered by the studio itself rather than subcontracted out.

The three PairStack takes on most are websites and web platforms, AI solutions, and AI-integrated websites. Alongside those: mobile and cross-platform apps, social media management, API work and third-party integrations, interface implementation, performance fixes, and maintenance. Small jobs are welcome - a single integration or a speed audit is as valid a brief as a full build.

Yes. Alongside the web and AI work, PairStack takes on enterprise IT infrastructure: Windows Server administration (WinTel), Active Directory with DNS, DHCP and Group Policy, Windows VM administration, Microsoft 365 and Exchange Online administration, Microsoft Intune endpoint management, Entra ID (Azure AD) identity and access, and infrastructure migrations. It is delivered by a senior engineer with 15+ years in production environments, as project work, L2 support cover, or a retainer.

Yes. PairStack handles SEO and technical site audits, Google Ads and paid campaigns, content strategy and email, and the analytics and tracking behind them. It pairs naturally with the websites the studio builds - the same team that ships the site can make sure people actually find it.

PairStack is a freelance studio, not an agency. You hire the engineers directly, which means no account layer, no markup on someone else's time, and no project passed to whoever is free that week. Engagements run from a single piece of work to an ongoing retainer, and clients can start small and scale up.

PairStack was founded by Saurav Das and Md Sanaullah Ansari. Saurav leads the platform side: Java and Spring Boot services, MySQL schemas, AWS deployments. Sanaullah leads the AI side: RAG pipelines, agent workflows, vector search, and computer vision. Both stay on a project from the first call to the last deploy.

PairStack works from India on Indian Standard Time (GMT+5:30), holding evenings open for US calls and mornings for Europe. Briefing, reviews, and handover all happen remotely, so a client in another country works with the studio exactly the way a client in India does.

Use the form on pairstack.in, email pairstack@gmail.com, or call +91-9064187639. A reply comes within 24 hours on weekdays, and it is an honest read on whether the project is a fit rather than a pitch. If it is a fit, the next step is a call to pin down scope, timeline, and price.

Both depend on what is being built, so PairStack quotes after a call rather than guessing up front. A single integration or a performance pass can be a matter of days. A full platform or an AI product runs longer. Either way, scope, price, and dates are agreed in writing before work starts.

On the web: React, Next.js, TypeScript, Node.js, Python, and Java with Spring Boot, over MySQL or PostgreSQL, deployed on AWS with Docker. For AI: LangChain, OpenAI models, vector databases such as Qdrant, and OpenCV or YOLO for vision work. The stack follows the project - PairStack does not push one setup onto every brief.