Engineering Professionals: Insights & Resources

Best Fractional CTO & Outsourced CTO Services in Bulgaria

Ryan Stevens

January 19, 2026

Best Fractional CTO & Outsourced CTO Services in Bulgaria

Best Fractional CTO Services & Outsourced CTO in Bulgaria

As Eastern Europe continues to rise in global recognition for its rich pool of technical talent, Bulgaria has emerged as a quiet powerhouse for digital innovation. From Sofia to Plovdiv, the country is home to a growing community of engineers, product experts, and tech leaders. With world-class skills, competitive pricing, and cultural alignment with the Western business mindset, Bulgaria is becoming an increasingly attractive destination for companies seeking fractional and outsourced CTO services.

Fractional CTOs offer an agile solution for businesses that need executive-level technology leadership without the commitment of a full-time hire. Whether guiding early product development, scaling a platform, or integrating AI into operations, these professionals provide hands-on strategy and operational oversight to help teams move fast and build right.

At Digital Reference, we are committed to building a more efficient, human-centric talent ecosystem by highlighting professionals and agencies who embody radical transparency and authenticity. This curated list of top outsourced CTO servuces in Bulgaria showcases firms and individuals who bring deep expertise, AI fluency, and a collaborative mindset to every engagement.

Our Methodology - Fractional CTO, Interim CTO, & Outsourced CTO Services in Bulgaria

Our curated list was built using the following criteria:

Regional presence and active leadership in Bulgaria
Breadth of CTO services including technical strategy, architecture, and team mentoring
Experience across industries such as SaaS, fintech, AI, and enterprise software
Integration of emerging technologies including AI, ML, and cloud-native infrastructure
Client success stories, thought leadership, and long-term value creation

These professionals represent strategic minds embedded within Bulgaria’s growing innovation ecosystem.

Meet the Best Outsourced CTO & Fractional CTO Services in Bulgaria

Delta Source

What they do:
Delta Source is a Bulgaria-based software consultancy providing fractional CTO services, supported by deep engineering and architecture expertise. They help organizations align technology with business goals through strategic leadership, hands-on technical guidance, and scalable system design.

Who they work with:
Startups, scale-ups, and established enterprises across the EU and US that need senior-level technical leadership without hiring a full-time CTO.

Operating model:
Fractional CTO leadership paired with in-house engineering and architecture support. Delta Source works closely with leadership teams to guide product strategy, conduct tech audits, and oversee complex technical transformations.

💡 Why they stand out:
✨ Fractional CTO expertise focused on digital product strategy and growth
⚡ Strong specialization in microservices, cloud-native, and API-first architectures
🤖 Practical AI integration for automation and product intelligence
🎯 Clear communication that bridges technical execution and business outcomes

Aleksander Dzhongarov, Chief Executive Officer

Aleksander Dzhongarov leads Delta Source with a strong foundation in both technical leadership and team development. With over a decade of experience growing from team lead developer to CEO, he brings hands-on engineering insight into executive decision-making. His leadership emphasizes scalable architecture, disciplined execution, and aligning technology initiatives with long-term business strategy—making Delta Source a trusted partner for companies navigating growth and digital transformation.

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Worbee

What they do:
Worbee is a boutique fractional CTO and technology strategy firm based in Bulgaria, providing hands-on technical leadership for startups and growth-stage companies. The firm focuses on turning product ideas into scalable digital solutions, with a strong emphasis on AI feature development, roadmap clarity, and execution support.

Who they work with:
Non-technical founders, early-stage startups, and scaling companies—particularly in PropTech and digital products—that need senior technical leadership without committing to a full-time CTO.

Operating model:
Embedded fractional CTO support that blends strategic oversight with real-time, hands-on decision-making. Worbee partners closely with founders to guide product architecture, oversee technical hiring, and accelerate product-market fit through practical AI integration.

💡 Why they stand out:
✨ Deep specialization in supporting non-technical founders
🤖 Strong expertise in AI-driven features and automation
🎯 Clear, actionable product roadmaps aligned with business goals
⚡ Embedded leadership style offering real-time technical guidance
🧠 A balance of technical empathy and strategic foresight

Robert Ivanov, Founder & Fractional CTO

Robert Ivanov is a fractional CTO and technical strategist with over 20 years of experience helping non-technical founders and growth-stage startups build scalable digital products. Drawing from his background as a technical co-founder, he provides hands-on leadership across AI feature development, product roadmapping, and technical hiring, enabling founders to make confident technology decisions and move faster toward product-market fit. His approach blends technical empathy with executive foresight, offering real-time guidance that aligns engineering execution with business strategy and long-term growth.
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MyCTO

What they do:
MyCTO is an AI-powered virtual CTO (vCTO) and vCISO services company that transforms traditional, expertise-dependent CTO work into a scalable, automated, and data-driven model. Founded in 2023, MyCTO combines seasoned C-level leadership with an AI platform that leverages machine learning to optimize technology strategy, cybersecurity, and IT operations.

Who they work with:
Startups, scale-ups, and enterprises that need on-demand CTO or CISO leadership, particularly organizations undergoing digital transformation, adopting AI, or strengthening cybersecurity without committing to full-time executive hires.

Operating model:
AI-accelerated CTO and CISO as a Service (CaaS), blending expert human leadership with patented machine-learning systems. MyCTO provides flexible, on-demand engagement where clients choose the exact skills needed—covering IT infrastructure, software architecture, AI integration, cybersecurity governance, and risk management.

💡 Why they stand out:
✨ AI-powered automation that scales CTO and CISO decision-making
🤖 Patented innovations in Bayesian networks for guided diagnostics and troubleshooting
🛡️ Integrated vCTO and vCISO services for tech and security alignment
⚡ End-to-end ownership with clear accountability per engagement
🎯 Strong focus on operational efficiency, risk reduction, and business impact

Nikolay Raychev, Founder

Nikolay Raychev is a renowned computer scientist, professor, and technology strategist with over two decades of experience transforming engineering organizations at critical inflection points. A pioneer in quantum computing, machine learning, and neuromorphic computing, he founded MyCTO to commercialize advanced research into practical, AI-driven executive technology leadership. His approach reframes engineering as a profit engine—not a cost center—by aligning architecture, talent density, and technical strategy directly with business outcomes. Through MyCTO, Raychev brings elite-level CTO and CISO capability to organizations seeking scalable, brutally effective, and future-ready technology leadership.

Why Bulgaria for Outsourced CTOs?

Bulgaria is quickly becoming a favorite for companies looking for cost-effective, high-impact technical leadership. Here’s why:

Skilled engineers and product strategists with international experience
Favorable business climate and strong EU integration
Competitive rates compared to Western Europe and North America
Time zone overlap with both European and Middle Eastern markets
Growing capabilities in AI, cybersecurity, and cloud infrastructure

These advantages make Bulgaria a compelling choice for fractional and virtual CTO services.

How CTOs in Bulgaria Are Using AI

AI is no longer optional—it’s a core driver of competitive advantage. The best CTOs in Bulgaria are helping companies:

Embed AI and machine learning into product features
Use AI to drive personalization, forecasting, and automation
Guide ethical implementation and compliance with AI regulation
Leverage open-source tools and AI-as-a-Service platforms for rapid iteration

Whether through computer vision, NLP, or predictive analytics, these leaders ensure AI is more than a buzzword—it’s a business asset.

When to Hire a Fractional CTO?

If you're wondering whether now is the time to bring in a fractional CTO, consider the following:

You’re a non-technical founder launching a complex platform
You need AI integration or machine learning expertise
You’re navigating a major architecture or team scale-up
You’re preparing for fundraising, due diligence, or technical audits
Your current tech roadmap lacks clarity or structure

Fractional CTOs offer flexible, strategic leadership that adapts to your growth journey.

Final Thoughts from Digital Reference

Bulgaria may be small in size, but it's making a big impact in the global tech landscape. With experienced CTOs like those at Delta Source and independent operators like Robert Ivanov, founders and growth-stage businesses can tap into affordable, AI-ready leadership that delivers.

At Digital Reference, we believe in illuminating the professionals and platforms shaping the future of work. Whether you're a founder, investor, or team lead, knowing where to find trusted talent—especially in regions like Bulgaria—can make all the difference.