Contract Square UAB

Contract Square UAB, which trades as ContractSQ, is a software agency that designs and builds custom applications for businesses, from startup MVPs to enterprise platforms. Each project begins with a discovery phase, and the firm has recently added AI and automation work to its core development services.

What Contract Square UAB offers

• Architecture and API design — systems built on microservices, event-driven patterns and domain-driven design.
• Full-stack web applications — React front ends with NestJS or .NET back ends.
• Database, infrastructure and DevOps — PostgreSQL, Redis, Docker and AWS, with automated CI/CD pipelines and infrastructure as code.
• Mobile development — cross-platform React Native apps for iOS and Android.
• AI and automation — retrieval systems over company documents, computer vision and OCR, AI agents, automated testing and workflow automation.
• UX research — discovery and user-centred design ahead of building.

Who it works with

ContractSQ works with startups building first products and with larger companies that need enterprise platforms; one showcased project, Parseo, is an AI invoice processing system that reads invoices from several ERPs.

Key facts

• Trading name: ContractSQ
• Technologies: React, NestJS, .NET, PostgreSQL, Redis, Docker, AWS and React Native