Product Manager · Designer · Builder
Sebastian
Voinea
Multidimensional by design. A product thinker with roots in code, a stage manager who shipped software, and a startup founder who taught others how to do the same.
Get in touch →
Based in Prague, CZ · Open to roles in 🇩🇰 🇪🇺 · Available now
Not one thing.
Not just a developer.
Not just a manager.
Originally from Romania, I moved to Denmark at 18 to study Computer Science. Never stopped moving. From Aalborg to Copenhagen, from code to product, from festival backstages to startup war rooms.
This site is not a polished résumé. It is a map of how I think: fast, cross-disciplinary, and always oriented toward the user.
A wide
toolkit,
deeply
used.
Product
- Product roadmapping
- User research & discovery
- OKRs & prioritisation
- Stakeholder management
Design
- Figma & prototyping
- UX flows & wireframes
- Design systems
- Visual design
Tech
- React / TypeScript
- Python & data analysis
- APIs & integrations
- Agile / Scrum Master
Leadership
- Teaching & mentoring
- Team coordination
- High-pressure ops
- Cross-functional comms
Computer Science
University College of Nordjylland · Aalborg
2019 – 2023
Technology Entrepreneurship
Danmarks Tekniske Universitet · Copenhagen
2023 – 2025
Built things
from scratch.
Twice.
During my studies I co-founded two ventures, diving in before I felt fully ready and learning faster than any classroom could teach. It was about shipping, iterating, and staying close to users.
Messy? Sometimes. Fun and rewarding? Always.
Product Manager & Full-Stack Developer
Sole contributor owning the full product lifecycle (user research, roadmapping, UX design, development, and DevOps) for a theater management platform serving non-technical end users at Divadlo Bravo! in Prague. Shipped data-heavy modules: payroll computation, budget tracking, grant reporting, expense and invoice management, and a bank integration enabling automated batch payments. Cut roughly a full day of manual admin work per week by re-engineering workflows, and leveraged AI to compress idea-to-production cycles, delivering at multi-engineer pace as a team of one.
Teaching Assistant, X-Tech Entrepreneurship
TA for DTU's flagship startup incubator course. Supported lectures and mentored early-stage teams on pitching, product design, business models, and go-to-market strategy, helping turn ideas into real startups.
Assistant Product Manager & Scrum Master
Led agile ceremonies and coached teams in best practices, significantly improving sprint efficiency. Facilitated communication between stakeholders and developers, ensuring customer feedback was seamlessly integrated into the product development cycle.
Where chaos
meets
execution.
Every summer, I trade the office for a festival. The controlled chaos, split-second decisions, and the satisfaction of thousands of people having a great time with no idea how much coordination it took.
This is not a hobby I mention in passing. It is proof I operate at full speed under pressure.
Stage Manager
Roskilde Festival
Coordinated live performances for the Apollo stage. Managed technical crews, oversaw stage setups, and maintained close communication with artists and production teams.
Recurring · DenmarkCrew Center Manager
Distortion
Managed crew operations at Copenhagen's urban music festival: logistics, scheduling, and real-time problem solving across a city-wide setting.
Recurring · CopenhagenStage Manager
Uhørt
Stage management for Denmark's festival for emerging music talent — keeping performances on time and artists supported.
Recurring · DenmarkStage Manager
O Days
Orientation festival stage management, coordinating performances and transitions for one of Denmark's key student events.
Recurring · DenmarkLet's build
something
together.
I'm actively looking for product manager and designer roles, ideally somewhere that values breadth as much as depth. If that sounds like your team, I'd love to hear from you.
sebastian.ioan.voinea@gmail.com