About us
Simplex Systems is a Sofia-based company that helps businesses turn technology challenges into innovative and workable solutions. With a focus on quality, innovation and a personal approach, we work to facilitate business processes and achieve your goals.
Established in 2019, Simplex Systems is built on the years of experience of its founders, who have over 20 years of practice in the IT industry. The combination of their experience and drive for innovation allows us to deliver effective and reliable solutions that optimise your business processes and drive its growth.
At Simplex Systems, we believe that technology is the key to success. Our goal is to make our clients’ jobs easier by offering customized IT services tailored to their specific needs and goals.
From designing and maintaining IT infrastructure to implementing innovative solutions and training, we work with attention to detail and a commitment to quality.
Founders:
Zahari Zahariev
CEO
Georgi Konstantinov
Sales Director
Why They Choose Us
When we reached out to Simplex Systems, we needed a complete optimization and modernization of our IT infrastructure. Our systems had been built up over time without a clearly structured security layer, and our process organization no longer met the needs of a fast-growing company. The Simplex team approached the project with exceptional professionalism — they conducted a thorough analysis, proposed specific improvement steps, and took on the implementation with full commitment. They built a stable, secure, and well-structured IT environment that not only resolved the accumulated issues but also laid the foundation for future growth. Since then, we've been using their subscription-based support — they're lightning-fast, proactive, and think strategically. Working with them gives us peace of mind and confidence that our IT operations are in safe hands. Simplex Systems has become a trusted partner we can fully rely on.
Ivo Petrov – Managing Partner, New System
Scania Bulgaria has been working with Simplex Systems for over 15 years, relying on their expertise for comprehensive support of our information systems, servers, network equipment, and first-level user support across all levels of our organization.
Simplex Systems is an extremely reliable and competent partner. With their help, we have a stable and dependable IT infrastructure and can focus on the systems and solutions that are critical to our business.
Anna Anchova – IT Director, Scania Bulgaria
We've been working with Simplex for so long that we're certain — if our systems ever crash, it must mean they've been hijacked by an alien Terminator sent by Skynet. Our apparent calm can't hide the fact that we're practically dependent on their support, which saves us from our own ambitions to blow everything up.
Filip Mutafis – CEO, Paysera Bulgaria
We’ve been working together for over a decade. They take care of everything on the IT side, and over time, you simply get used to being able to rely on them. Technology evolves, and so do we — with their help, we stay up to date. Over the years, we’ve replaced servers and systems, upgraded hardware and software, migrated services — and all of it happened without us ever feeling disruption. They provide us with reliable data protection and software stability. Peace of mind and security — that’s what we get from them.
Vassil Jivkov, Owner, Prodes
Simplex Systems has been handling all of our IT needs for so long that, to us, they’ve simply become part of how we operate. In the legal field, reliability, confidentiality, and information security are not advantages — they’re requirements. Simplex Systems meets those requirements without compromise. They understand the nature of our work and consistently provide the stability and security that allow us to focus on what truly matters.
Georgе Sabev – Managing Partner, Sabev & Partners Law Firm
We’ve been working with Simplex Systems for … years. We’ve always received impeccable service, attention to our digital processes, and prompt, timely responses whenever needed. System maintenance and license renewals are always handled on time and with minimal disruption to our work. Thank you for the work you’ve done and for being a partner we can rely on.
Ivan Ivanov – Managing Director, Agrotime
We’ve been working with the team at Simplex Systems for over 15 years — even before the company itself was officially founded. Over that time, we've gone through various stages and changes, but one thing has remained constant: the confidence that we can always rely on them. They know how to keep our work environment stable — without unnecessary noise or disruptions. They’re the kind of team you don’t see, but you can feel through the results.
Georgi Kolchakov – Managing Director, Beta Consult