Build skills you can use
Leave with reference architectures, security checklists, evaluation methods, testing strategies, observability patterns, decision frameworks and new ways to reason about complex systems.
BUILD STUFF 2026 · SOFTWARE DEVELOPMENT CONFERENCE · VILNIUS, LITHUANIA · DECEMBER 2–4
Build Intelligence. Keep Human Agency.
The software development conference for developers, engineers and architects.
Software is beginning to write, decide and act. Build Stuff 2026 brings together the developers, engineers, architects and technology leaders building this new reality — and deciding what must remain human.
Engineers from these companies were in the room last year
01 / The question
Software can now generate code, retrieve knowledge, choose tools, coordinate work and take action. This creates new possibilities, but also larger systems, unfamiliar failure modes and important questions about responsibility, security and control.
Build software that can act. Decide where it should stop.
AI agents and systems that increasingly act, decide and coordinate.
Engineers choosing better tools, architectures and boundaries rather than surrendering to hype.
Teams redefining roles, accountability and decision-making in the age of AI.
Preserving judgment, responsibility, creativity, focus and purpose.
02 / Evidence from the program
Software still needs sound architecture, reliable infrastructure, effective testing, strong security, accessible interfaces and people capable of making good engineering decisions. The theme emerges from the accepted sessions themselves.
Accepted-session export, September 13, 2026. Sessions may belong to more than one topic.
06 / Choose your access
Three days of real systems, working code, production lessons and consequential conversations in Vilnius, Lithuania — or join online from anywhere.
| Ticket | Pre-Early Bird Ended | Early Bird Ended | Late Bird Order by Oct 20Current price | Regular Order by Nov 13 | Late Saver Order by Nov 25 | Last Minute From Nov 26 | Buy |
|---|---|---|---|---|---|---|---|
| VIP 3-Day OnsiteAll three days in Vilnius, Lithuania | €650 | €770 | €870 | €950 | €990 | €1,090 | Choose |
| 3-Day OnlineJoin from anywhere | €380 | €410 | €440 | €470 | €530 | €590 | Choose |
| 1-Day OnsitePick your conference day | €350 | €390 | €430 | €460 | €520 | €580 | Choose |
| VIP 3-Day Onsite + Hotel (3 nights)Three nights included | €1,070 | €1,170 | €1,270 | €1,370 | – | – | Choose |
VIP 3-Day · 1-Day Onsite · 3-Day Online · VIP + Hotel
04 / Confirmed keynote
AI safety and security researcher · University of Louisville
Author of more than 300 publications on AI safety and security. His work confronts the central question of this conference: how much authority should intelligent systems receive, and who remains accountable when software makes decisions on our behalf?
Part of a lineup of 84 speakers across six stages.
Also confirmed
Expect working code, live demonstrations, production postmortems, experiments, decision frameworks and lessons earned by building real systems.
Host of .NET Rocks, RunAs Radio and Windows Weekly
Building Data Centers That Don't Suck
Independent Consultant · Lucky Penny Software
OpenTelemetry in a Brownfield World
Disaster Postponement Officer · Zencoder
Building Rock-Solid Encrypted Applications
Keynote · Award-winning author · Agile Developer, Inc.
From Specification to Production, Engineering in the Age of AI
Thought Provoker · Curbralan
The Past, Present and Future of Programming Languages
Consultant · Arana Software
Turtles All the Way Down and Trauma All the Way Up
Director/Founder · Diamond PMO Solutions
The Second Line: What a New Orleans Jazz Funeral Teaches About Building Recoverable AI Systems
Senior Software Architect · Systematic
AI in the Dark: Running LLMs in Air-Gapped Production Environments
03 / How the theme translates
Responsible agency: give systems appropriate authority, with clear boundaries, security and accountability. Resilient agency: build software that can withstand failure, adapt to change and remain understandable in production. Human agency in practice: preserve judgment, creativity, focus and responsibility as our tools become more capable.
We are entering a phase where software no longer only executes instructions; it interprets, decides and acts.
Build Stuff is where AI moves beyond prompts and prototypes into architecture, infrastructure, testing, security and production.
The most important design decision may be where autonomy ends and human responsibility begins.
Systems thinking, code quality, performance, reliability, security and domain knowledge become more, not less, important.
The future is being designed by the people in the room, not happening to them.
05 / What you will learn
Expect working code, live demonstrations, production postmortems, experiments, decision frameworks and lessons earned by building real systems.
Learn how to choose the right agent technology, structure spec-driven development, coordinate specialized agents and create portable memory and context layers that do not lock knowledge into a single model or provider.
Why it matters Generating code is becoming easier. Proving that the result is correct, secure, maintainable and worth operating is becoming the harder part.
See what happens when AI moves from suggesting an answer to issuing a refund, modifying infrastructure, accessing private data or taking an irreversible action.
Why it matters Stronger prompts cannot serve as security boundaries. Systems need to remain safe when a model is confused, manipulated or simply wrong.
Go deep into modularity, Domain-Driven Design, context maps, event sourcing, dependency injection, resilient distributed systems and evolutionary architecture.
Why it matters More generated code does not automatically create better software. Clear boundaries and sound architectural decisions become more valuable as the volume of code increases.
Follow the program from local development environments to Kubernetes, Kafka, sovereign cloud platforms, AI gateways, internal AI factories and the physical realities of modern data centres.
Why it matters Cloud and AI systems eventually meet physical, financial and regulatory limits. Good engineering requires understanding those limits before they become incidents or expensive architectural traps.
Explore end-to-end encryption, perfect forward secrecy, secure device migration, OAuth, post-quantum security, prompt injection and lessons drawn from 1,000 real data breaches.
Why it matters Systems are gaining access to more tools, credentials and sensitive information. Security has to be part of the architecture, not a feature added after deployment.
Develop practical skills in modern SQL, testing, code archaeology, browser APIs, web performance, programming language design and the future of version control.
Why it matters Most production software was not written yesterday. Developers still need to understand existing systems, make careful changes and recognize when a new approach is genuinely better.
Connect accessibility, cognitive psychology, interface design, performance, real-time graphics, virtual reality and the science of memory.
Why it matters Faster production does not guarantee a better product. People still need software that is understandable, accessible, responsive and designed for their real needs.
Examine engineering roles, technical hiring, team design, technical debt, communication, focus, neurodiversity and resilience.
Why it matters Speed without clarity creates more rework, worse decisions and exhausted teams. Sustainable engineering depends on attention, communication and organizational judgment.
Leave clearer about what to build, how to build it — and what should remain human.
Get your ticket07 / 2012 — 2026
Since 2012, Build Stuff has grown into the largest software development conference in the Baltics. In 2026, we celebrate our 15th Build Stuff in Lithuania by returning to the idea that started it all: a conference for people who build stuff.
Developers. Architects. Designers. Data professionals. Security specialists. Engineering leaders. Founders. Researchers. Everyone turning complex ideas into technology that matters.
Who is in the room
Joined by engineers, architects, researchers and technology leaders from organizations including Microsoft, Nord Security, Redpanda, EPAM, Systematic, Vilnius University, Johns Hopkins University, the University of Zurich and many others.
08 / Beyond the sessions
Build Stuff also looks beyond everyday product development — from clinical genomics in hospitals to AI infrastructure changing biology, data transforming manufacturing and virtual worlds helping scientists study human memory. The systems we build increasingly affect medicine, industry, culture, privacy and the way people understand the world.
Leave with reference architectures, security checklists, evaluation methods, testing strategies, observability patterns, decision frameworks and new ways to reason about complex systems.
Meet developers, architects, researchers, founders and technology leaders from around the world. Exchange ideas, challenge assumptions and form relationships that continue long after the conference.
In an age of synthetic content and effortless claims, real experience matters. Trust grows through face-to-face conversations, working demonstrations and honest accounts of what succeeded, what failed and what was learned.
Examine how much authority intelligent systems should receive, who should control critical data, what organizations should own, and how teams can move faster without losing quality, judgment or focus.
Continue the conversation through meetups, social activities and games. Recharge in the chill-out space, discover Vilnius, Lithuania and experience the famous Build Stuff party, an unforgettable evening of technology, comedy, music and community.
Build Stuff is committed to providing a safe, welcoming and harassment-free experience for everyone, regardless of gender, gender identity, age, sexual orientation, disability, physical appearance, race, ethnicity, religion, background or technology choices. Our Code of Conduct helps create a space where every participant can contribute, learn and belong.

Real systems · Real decisions · Real responsibility
Let's Build Stuff.
Partner packages from €2,500 excl. VAT · Community, Silver, Gold and Platinum (limited to 2)