Meet Our Team
The minds behind Sustainly, dedicated to simplifying sustainability.
Peter Å pirec
CEO
At Sustainly, we believe that the issue of ESG and sustainability can be approached pragmatically. There's no need to be afraid of it; you've already done most of the work in your company, you just don't know that ESG is behind it.
Experience:
- Sustainable Finance
- Institutional ESG governance
- Advising corporate clients
- First ESG bond in the banking sector in the Czech Republic
- Leadership of the European Taxonomy Working Group under the Czech Banking Association
Kasra Parhun
CTO
Kasra is a senior, product-focused Full-Stack Engineer with core expertise in building secure, high-performance applications. Leveraging an AI-native workflow and a deep background in quality assurance, he analyzes complex architectural challenges from multiple perspectives to deliver robust, scalable solutions.
Experience:
- Full-Stack Development: Architecting and developing core application features using Next.js, TypeScript, and PostgreSQL
- Systems Engineering: Managing database schemas with Drizzle and engineering API integrations with services like n8n
- Web3 & Fintech: Specialized experience in blockchain functionalities, wallet integrations, and smart contract interactions
- Quality Assurance Leadership: Architecting end-to-end testing strategies and automated processes to drastically improve product quality
- Business Growth: Over a decade of experience in building and scaling digital properties and managing the full business lifecycle
Arnošt Havelka
Solution Architect & Full-Stack Developer
Arnošt architects and ships production systems end-to-end. At Sustainly he rapidly integrated third-party services, led a full application refactor, and applied SEO strategies from his own SaaS projects to measurably grow organic reach — all within months of joining. He is also a member of Microsoft STC.
Experience:
- Rapid Integration Delivery — Designed and delivered third-party service integrations at Sustainly from scratch, enabling automated workflows and data pipelines that became core product infrastructure — shipped within weeks of joining.
- Application Refactoring — Took full ownership of a codebase-wide refactor, restructuring the architecture for long-term maintainability and enabling the team to ship new features significantly faster.
- Analytics Integration — Implemented the full analytics layer from scratch, giving the team their first data-driven view of user behaviour and directly informing product decisions.
- SEO Architecture — Transferred proven SEO patterns from Windows CLI Hub to Sustainly: structured metadata, Open Graph, and multilingual routing — delivering a measurable lift in organic discoverability.
- Windows CLI Hub — Independently architected and launched windows-cli.arnost.org: a production SaaS platform for command-line learning with a live sandbox terminal, Brevo newsletter integration, and a freemium model.
- Microsoft STC Member — Part of Microsoft's Student Technology Community, contributing alongside engineering and product teams working on cloud services at scale.