Pro Websites, Apps & AI Data Solutions

Our expertise includes...

Application
development

Custom web and mobile applications designed for any budget and requirement.

Professional
Websites

Modern, affordable, and highly efficient websites tailored for the construction industry.

Data
Science

Advanced data mining, scraping, catalog building, and predictive forecasting for actionable insights.

Machine
learning

Expert LLM pre-training, context engineering, and intelligent agentic workflows.

Code of web page displayed on a computer monitor

Combined
systems

Leveraging the best AI models tailored for each unique challenge.

Automated
testing

Production-proofing powered by custom-trained AI agents.

Fast
delivery

Parallel workflows ensuring rapid, record-time deployment.

Razvan Radescu

CEO & Founder

25+

Years of
Experience

We use ONLY European providers!

House Ideas Catalog | CaseBineFacute.ro

App development

Multimodal AI System for Technical Diagnostics in Refrigeration Engineering | TASSID

Professional websites

Real Estate Aggregator | eDezvoltator.ro

Machine learning

Industrial-Scale Automated Website Development | CELSO

App development

We combine innovation, efficiency, and expertise to provide end-to-end solutions tailored to your needs. With a strong foundation in AI and modern systems, we ensure superior results, every time.

90% automated

We utilize custom-built machines for maximum efficiency and precision.

Romanian team

Access to top-tier, highly skilled talent at globally competitive rates.

25+ years experience

Developing websites, optimizing and crafting custom software solutions since 2001.

Self-hosted training

Our machine learning is powered by our own high-performance hardware.

Market validation

Trusted by 450+ satisfied clients—our track record speaks for itself.

best price guarantee

Found a better offer? Let's see it! We’ll match it or pay for your project.

We do digital marketing since 2001

Satisfaction score 4.9 of 5

Based on 350 feedback forms submitted in 2025

I worked with CELSO both to create ASPA’s presentation website and to develop a complex application through which we manage and promote for adoption the dogs in our shelters. The collaboration was seamless, and together we achieved even more than we initially set out to accomplish.

Cătălina Trănescu

General Manager ASPA
The Municipality of Bucharest

The team at CELSO exceeded all expectations when it came to building our website. We've asked for many custom functions which they built fast and at a very good price. Also, they provided expertise whenever we were at doubt about various design, content or functionality issues.

Laura Fincu

General Manager
SACHE Foundation

CELSO built for our company many custom solutions but the most complex was a CRM that includes many specialized functions - this alone allowed us to save thousands of euros yearly by discontinuing the subscription based CRM that we used before. Strongly recommend this team, they work quickly and accept any challenge!

Daniel Sârbu

General Manager
TASSID HOLDING

LET’S BUILD YOUR PROFESSIONAL WEBSITE OR WEB APP TOGETHER!

WE DELIVER EXCEPTIONAL VALUE THROUGH OUR WORK ETHIC:

EFFICIENT COMMUTES, REMOTE WORK

We prioritize work-life balance—meeting clients only when necessary, and working remotely to maximize productivity.

AUTOMATION AS FIRST APPROACH

Machines handle the heavy lifting, freeing our team to focus on creativity and coordination.

CUSTOM PROCEDURES, CONTINUOUS ADAPTATION

We streamline digital marketing with repetitive yet adaptable procedures, ensuring flexibility for any challenge.

STRUCTURED PROJECT MANAGEMENT

Using advanced tools, we control complex projects in parallel, allocating resources effectively.

AGILE AND INNOVATIVE

We build custom AI solutions for every problem, thinking outside the box to adapt, improve, and overcome.

Meet our team

+
a Swiss
Company

500+

Projects Completed

450+

Active Clients

Team members

Collaborators

Join Our Team

READY TO BE PART OF SOMETHING EXCEPTIONAL?

At CELSO, we don’t just build digital solutions—we innovate, inspire, and transform industries. If you’re passionate about technology, creativity, and making an impact, we’d love to have you on board.

Discover a workplace where your ideas matter, your growth is encouraged, and your work drives real change. Let’s build the future together.

EXPLORE OPEN POSITIONS