
Atta Systems
Atta Systems works with innovative VC-backed startups as well as established companies in Healthcare, Education, Finance, Government & Administration.
Overview
Founded in 2015 and headquartered in Bucharest, Romania, Atta Systems is a boutique product engineering studio with business presence in Singapore and virtual offices in California and London. Formerly operating as AB4 Systems, the company has built a focused track record of taking more than 30 products to market – generating over $100 million in new market value and supporting clients in raising over $15 million in capital over the past four years. Clients include EY (Ernst and Young), UNICEF, UiPath, Medicai, Nicola Wealth, Species Plus, EdXP, and Eupnoos.
The company’s delivery model rests on three clearly sequenced phases: Product Design (requirements, architecture, user research), Technical Assessment (feasibility, stack selection, risk evaluation), and Product Development (engineering, testing, deployment, and iteration). This structured approach – combined with direct communication and technical ownership – has resulted in multiple ANIS (Romanian IT Industry Association) awards including Startup of the Year 2021 and R&D Project of the Year 2023, plus Clutch recognition as a Top App Developer in Romania.
Atta Systems holds four ISO certifications including ISO 13485 for Medical Device Software – positioning it as a credible partner for regulated healthcare and Medtech software delivery. Its Singapore presence reflects a strategic focus on the APAC market alongside its European client base in Romania, Canada, and the United Kingdom.
Certifications/Compliance

