I design and scale
high-performance systems.
From system design to scaling under pressure — I help teams build backend systems that don’t break.
Experience with systems handling millions of events, large-scale datasets, and high-traffic production environments.
"The problem isn’t ideas anymore.
It’s choosing the right ones."
"Technical precision meets creative vision."
I’m Peter Ujvari. With 18+ years in engineering and a decade spent in the trenches of high-traffic distributed systems, I’ve lived the transition from developer to Systems Architect. This means my designs aren't just theoretically sound—they are buildable, maintainable, and grounded in real-world performance.
I don’t just draw diagrams; I understand the financial and operational cost of every decision because I’ve been the one building and running these systems. My approach focuses on predictability and resilience—ensuring your infrastructure scales without slowing down your engineers or creating expensive technical bottlenecks.
I work hands-on with teams to deliver pragmatic architecture—balancing performance, cost, and complexity without overengineering.
What I bring
- real-world experience with systems under load
- architectures that are actually buildable
- focus on long-term maintainability and cost
Expertise Focus
- 18+ Years Experience From deep-level coding to strategic leadership.
- Data Ingestion Expert Processing millions of events and massive datasets daily.
- AWS Architecture Specialist
Trusted by Partners
Consulting & Strategic Advisory
I help companies design, scale, and stabilize complex backend systems.
Backend & System Architecture
High-performance architectures designed for resilience and extreme scalability.
- Greenfield system design & architecture from scratch
- Strategic restructuring of existing, and legacy systems
- Designing event-driven architectures and scalable microservices ecosystems
- High-load optimization & fault-tolerance
Architecture & Scalability Review
Deep-dive audits to eliminate bottlenecks and prepare for massive growth.
- Comprehensive system & risk analysis
- Technical debt assessment & mitigation
- Bottleneck identification
- Infrastructure and cost analysis
- Strategic architecture improvement roadmaps
Database & Data System Optimization
Performance tuning and redesign for mission-critical datasets and heavy traffic.
- Complex query & large-scale dataset tuning
- Schema design & index optimization
- Advanced partitioning & sharding solutions
- High-throughput data pipeline scaling
Data Acquisition & Ingestion Systems
Robust pipelines for reliable large-scale data collection and real-time processing.
- Distributed crawler & scraping architectures
- Fault-tolerant, large-scale, queue-based ingestion pipelines
- Real-time event-driven processing
- Massive-scale data stream management
Fractional Architect / Technical Advisor
Strategic architectural oversight and fractional leadership. I act as a long-term partner to help organizations navigate critical technical decisions, mentor engineering teams, and ensure their systems evolve seamlessly alongside the business.
- High-stakes architecture decision support
- Hands-on technical leadership & code reviews
- Mentoring and elevating engineering teams
- Long-term system evolution strategy
- Platform modernization & tech-stack selection
- Engineering process & velocity optimization
- Scalability preparation & risk management
- Bridging business goals with engineering reality
When to work with me
I work with engineering teams facing scaling challenges, architectural decisions, or complex system problems.
Your system is struggling
- your system is slowing down as traffic or data grows
- you're hitting performance or scalability bottlenecks
- your infrastructure costs are increasing without clear reason
You're designing a new system
- you're planning a new system and want to get the architecture right from the start
- you're redesigning an existing platform for future growth
- you need a clear, scalable foundation before building further
You're facing complex technical decisions
- your team is struggling to execute on a complex technical direction
- technical decisions are slowing down progress or creating uncertainty
- your data pipelines are becoming complex, unreliable, or hard to maintain
- you need a second opinion before a critical technical decision
Selected work
Examples of systems I’ve worked on and problems I’ve solved.
Beyond the Code
"The same focus, patience, and eye for detail I use to capture the perfect landscape is what I apply to designing software architectures."
Schedule a Call
Looking for high-level architectural guidance or system optimization? I take on a limited number of projects per year.
Let’s discuss your system, challenges, and how to scale it effectively.
Prefer email? Reach out at contact@peterujvari.com — I typically respond within 24 hours.