I specialise in turning complex business and operational logic into reliable user-facing products. My strongest work tends to be in domains where the logic is messy, the workflows matter, and the frontend needs to stay understandable.
Senior Software Engineer
Zoltan Rendes
I build complex web products that are clear to use and solid under pressure.
Senior Software Engineer with 10+ years of experience building scalable, data-driven web applications with React, TypeScript, and a product engineer mindset.
Profile
Product-minded engineering for teams working with complexity.
I work across architecture, product delivery, and implementation, helping teams modernise existing systems, improve performance, and ship practical solutions within real technical and organisational constraints.
Experience
Experience across enterprise software, fintech, SaaS, and long-lived systems.
Senior Software Engineer Eclipse Veterinary Ltd
Leading frontend development for the Eclipse Hospital Module, modernising the UI layer of a veterinary enterprise platform while extending the architecture for new hospital workflows and product capabilities.
- Delivered end-to-end workflow features, including automated appointment reminders.
- Helped shape module architecture while preserving compatibility with existing systems.
- Ran demos, gathered user feedback, and refined delivery around real operational needs.
Senior Software Engineer Iotic Labs
Built complex frontend applications in React and TypeScript for large-scale data workflows, while also contributing backend services in Python to support product functionality and processing pipelines.
- Designed reusable UI patterns that reduced duplication and improved development speed.
- Improved responsiveness through targeted render and performance optimisation.
- Supported onboarding and mentoring to raise team delivery capacity.
Front-End Developer Smart Pension Ltd
Worked across React and Ember applications, turning financial data and business logic into clearer, more intuitive frontend product experiences.
- Partnered closely with backend teams to deliver user-facing financial workflows.
- Helped junior developers onboard and become productive more quickly.
Software Developer KM Software Systems
Developed enterprise software modules, integrations, and reporting tools to improve operational visibility and support business decisions.
Software Engineer EPAM Systems
Built frontend tools and integrations for stock exchange connectivity and market-data-driven financial systems.
Strengths
What I tend to bring to a team.
Architecture
I design frontend systems that can absorb new product requirements without collapsing into accidental complexity.
Product Thinking
I pay attention to how people actually use a system, not just whether the feature technically works.
Delivery
I work comfortably in business-critical environments where reliability, clarity, and stakeholder alignment matter as much as implementation speed.
Performance
I pay attention to responsiveness, rendering cost, and frontend efficiency where performance has a visible impact on product quality.
Stack
Core tools and technologies.
Core frontend
React, TypeScript, JavaScript, Redux, Redux-Saga, React Hooks, Ember, React Native
Additional backend experience
Python, Django, Flask
Quality
Jest, React Testing Library, Cypress, Pytest
Platform
PostgreSQL, SQLite, Git, GitHub Actions, CI/CD pipelines, GoCD