Why Attend
Bulgaria’s First Conference Dedicated to the Data Stack! Meet engineers, join hands-on workshops, attend deep-dive sessions, grab cool DB swag, network with peers, and get real-world insights over coffee or beer.
Ready to explore the future of data? Join the movement that’s redefining how we build, scale, and think about databases.
About Data Stack Conf 2025
The Data Stack Conference will take place on October 29th, 2025, at the Inter Expo Center in Sofia — one of Bulgaria’s premier venues for high-tech, innovation, and digital transformation events. With its modern infrastructure and central location, it’s the perfect space to bring together database engineers, architects, and tech leaders from across the region.
Data Stack Conference is Bulgaria’s first event focused entirely on modern data infrastructure and the people who build it.
We bring together developers, engineers, SREs, and DevOps professionals for a full day of deep technical talks, hands-on sessions, and real-world stories.From databases and observability to scalability and system design — if you're building, tuning, or deploying data systems, this is your conference.
Platinum Sponsors
Gold Sponsors
Community Partners
The Team
One Day. Two Tracks. Zero Fluff.
08:00 – 08:30 — Check in ☕
Welcome to Data Stack Conf 2025! Check in at the registration desks and enjoy complimentary coffee and snacks. A great moment to meet fellow attendees and ease into a full day of tech, talks, and deep dives.
08:30 – 08:45 — Opening 🚀
Welcome to Data Stack Conf 2025!
08:45 – 09:00 Radoslav Stanoev, SAP — Ignore This and It Can Kill Your Database
Radoslav Stanoev, SAP – Our opening keynote exposes the data risks uncovered while managing hundreds of thousands of database instances — and sets the tone for everything that follows at Data Stack Conf 2025.
09:00 – 09:10 — Break ☕
Take a short pause, grab your free coffee, and recharge before the next round of sessions. This is the perfect moment to network, catch up with peers, and enjoy some fresh energy — on us.
09:10 – 09:40 Pavlo Golub, CYBERTEC — Professional PostgreSQL Monitoring Made Easy
Pavlo Golub, Senior Developer & Consultant at CYBERTEC PostgreSQL Services and Support, takes the stage at Data Stack Conf 2025!
With years of hands-on PostgreSQL expertise, Pavlo brings deep insight into observability — from native metrics to modern alerting using the open source pgwatch, integrated with TimescaleDB and Grafana.
09:40 – 09:50 — Break ☕
Take a short pause, grab your free coffee, and recharge before the next round of sessions. This is the perfect moment to network, catch up with peers, and enjoy some fresh energy — on us.
09:50 – 10:20 Yordan Ivanov, DEXT — Singer Explained for Modern Data Engineers
Yordan Ivanov from Dext demystifies Singer — the open-source standard for building and running data connectors. Learn how Singer’s Taps and Targets help you move data between systems with confidence, transparency, and less engineering overhead.
10:20 – 10:50 Karthik Dulam, EDB — Orchestrating MLOps and Data Transformation with Airflow
Karthik Dulam from EDB walks through building robust, production-ready MLOps pipelines using Apache Airflow.
You’ll learn:
✔ How to automate end-to-end ML workflows
✔ Best practices for managing data transformation and model training
✔ How to integrate Airflow with tools across the ML stack
10:50 – 11:00 — Break ☕
Take a short pause, grab your free coffee, and recharge before the next round of sessions. This is the perfect moment to network, catch up with peers, and enjoy some fresh energy — on us.
11:00 – 11:30 L. Nedyalkov & P. Rusev, SAP — From Silos to Smart Data: Knowledge Graphs for AI Agents
Lyubomir Nedyalkov and Petar Rusev from SAP , explore how Knowledge Graphs transform fragmented enterprise data into a connected foundation for intelligent systems and AI agents.
You’ll discover:
✔ Why traditional data models fall short for AI
✔ How to build and query semantic relationships at scale
✔ Real-world examples of using Knowledge Graphs for multi-agent systems
11:30 – 12:00 Mihail Petrov, BSUG — Do You Speak LLM DB – or How to Talk with the Database in Your Own Language
Mihail Petrov, co-founder of the Bulgarian Snowflake User Group, explores how Large Language Models (LLMs) are reshaping the way we interact with data — from natural language interfaces to prompt-to-query systems that translate intent into execution.
You’ll learn:
✔ How LLMs are powering new database experiences
✔ What “LLM DB” really means in production
✔ Pitfalls, performance, and the future of language-native data access
12:00 – 13:30 — Lunch Break 🍔
Time to recharge! You're free to explore the area — there are plenty of restaurants, cafes, and lunch spots within walking distance of the Inter Expo Center. Whether you're craving something quick or want to sit down with fellow attendees, you’ll find a wide range of options nearby.
Use this time to refuel, connect, and get ready for the second half of the day!
13:30 – 14:15 Ivan Donev, DUGB — Lakehouse vs Lakebase: Is Databricks Ready for Mission-Critical OLTP Workloads
Ivan Donev, Founder of Databricks User Group Bulgaria, explores the evolution from lakehouse to lakebase and asks the big question:
Can Databricks truly power mission-critical OLTP workloads — or is it still a dream?
You’ll learn:
✔ The architectural shift from analytics to hybrid OLTP workloads
✔ What “lakebase” really means — and where it stands today
✔ Benchmarks, trade-offs, and design patterns from the field
Ideal for data architects, engineers, and decision-makers exploring the frontier of unified platforms.
14:15 – 14:20 — Break ☕
Take a short pause, grab your free coffee, and recharge before the next round of sessions. This is the perfect moment to network, catch up with peers, and enjoy some fresh energy — on us.
14:20 – 15:05 Lyubomir Tulev, CyberXperts — Data Under Siege: 10 Modern Attacks and the Playbook to Outsmart Them
Lyubomir Tulev, CEO – CyberXperts, reveals 10 real-world threats targeting your data stack — and shares a practical playbook to detect, prevent, and outsmart them.
15:05 – 15:10 — Break ☕
Take a short pause, grab your free coffee, and recharge before the next round of sessions. This is the perfect moment to network, catch up with peers, and enjoy some fresh energy — on us.
15:10 – 15:40 Lætitia Avrot, Postgres Women— PostgreSQL and the Trash Bin System
In this talk, Lætitia Avrot unpacks the fascinating inner workings of the PostgreSQL community — a thriving ecosystem built not on hierarchy, but on collaboration without control. It’s a masterclass in reverse management, and a challenge to everything you thought made a project succeed.
15:40 – 16:10 Valeria Bogatyreva, Percona — Close Compliance and Security Gaps with Open Source TDE for PostgreSQL.
Join Valeria Bogatyreva from Percona as she dives into pg_tde, an open-source Transparent Data Encryption (TDE) extension for PostgreSQL. Purpose-built for compliance, performance, and multi-tenant workloads.
You’ll learn how to secure your PostgreSQL stack with:
✔Full support for PCI DSS, HIPAA, GDPR, SOX
✔ WAL & tablespace encryption
✔ Centralized key management
✔ 100% open source — no vendor lock-in
16:10 – 16:20 — Break ☕
Take a short pause, grab your free coffee, and recharge before the next round of sessions. This is the perfect moment to network, catch up with peers, and enjoy some fresh energy — on us.
16:20 – 16:50 Devrim Gündüz, EDB — Extend Your PostgreSQL: The World of PostgreSQL Extensions
In this talk, Devrim Gündüz, longtime PostgreSQL advocate and expert at EDB, dives into the rich ecosystem of PostgreSQL extensions — from performance boosts to brand-new capabilities.
You’ll learn:
✔ What extensions matter most in real-world systems
✔ How to safely manage and deploy them
✔ Tips for building your own
Unlock the full potential of your favorite database.
16:50 – 17:00 — Break ☕
Take a short pause, grab your free coffee, and recharge before the next round of sessions. This is the perfect moment to network, catch up with peers, and enjoy some fresh energy — on us.
17:00 – 17:30 Velmira Georgieva, SAP — Kubeflow Unpacked: From Raw Data to Clean Wins
Join Velmira Georgieva from SAP for a hands-on tour through one of the most powerful open-source platforms for managing machine learning workflows on Kubernetes.
🔍 In this session, you’ll explore:
• Kubeflow’s strengths and challenges
• Core components and architecture
• Real-world orchestration with reusable pipeline steps
• Hyperparameter tuning and model deployment
• Live demo with full pipeline + data visualization
If you’re building or scaling ML workflows — this session is for you.
17:30 – 17:40 — Break ☕
Take a short pause, grab your free coffee, and recharge before the next round of sessions. This is the perfect moment to network, catch up with peers, and enjoy some fresh energy — on us.
17:40 – 18:25 Julian Dontcheff, Oracle — Think Relational, Stay JSON: Oracle’s Duality View Revolution
Join Julian Dontcheff from Oracle as he introduces Duality Views — Oracle’s groundbreaking innovation that combines the flexibility of JSON with the structure and power of relational databases.
You’ll learn how to:
- Migrate applications from MongoDB with minimal friction
- Map JSON documents to relational tables automatically
- Use relational and JSON views interchangeably
- Simplify app development while ensuring compliance and performance
18:25 – 18:45 — Closing 🎁
As Data Stack Conf 2025 comes to a close, join us for a quick wrap-up to celebrate the day, thank our amazing speakers, sponsors, and community — and, of course, announce the winners of our closing raffle! 🎁
Stick around — you might walk away with an awesome surprise from our partners.
Sessions
