I fix and scale production systems that are already under pressure.

I work with startups and teams to stabilize, refactor, and ship backend-heavy systems — without unnecessary rewrites.

Available for architecture audits, refactor sprints, and critical system fixes.

Book a call See case studies

About

I'm Peter Szollar, a Staff Software Engineer & Solution Architect.

Most systems do not break because of scale — they break because of early architectural decisions. I focus on getting those foundations right, especially in systems that are already in production.

I work hands-on as a lead developer or full-stack engineer when needed, but my main focus is making systems simpler, more predictable, and easier to operate long-term.

I'm also the CEO and owner of Clever Goat, where we help companies stabilize and evolve production systems — not just build new ones.

If your system is getting harder to maintain, slower to change, or starting to break under pressure, I'd be happy to talk.

Tech Stack

Technologies I use to build and operate reliable production systems — not a complete list.

TypeScript
Node.js
React
Next.js
React Native
PostgreSQL
Supabase
Docker
Kubernetes
Nginx
Expo
Firebase

Recent Projects

Cric Pulse

Built a reliable backend system that processes incremental data from Firebase in real time — without inconsistencies or failure states.

Designed a deterministic, rule-based processing engine with strict validation, ensuring predictable outputs and stable system behavior under continuous load.

What this solved:
  • Eliminated data inconsistencies from async updates
  • Ensured deterministic processing with no unexpected states
  • Reduced operational risk in production workflows

Role: Full-Stack Engineer / Architect

Stack: Node.js, TypeScript, Docker

Most of the source code is under NDA, but I'm happy to discuss architecture decisions, trade-offs, and outcomes.

Review Goat

Built a platform and dashboard for validating and acquiring authentic, ethical Google reviews at scale.

Focused on delivering a reliable workflow for review acquisition, validation, and operational visibility across a growing product.

What this solved:
  • Replaced a manual, error-prone review process with a structured acquisition pipeline
  • Added validation logic to filter out low-quality or non-compliant submissions
  • Gave operators full visibility into review status and campaign performance

Role: Full-Stack Engineer / Architect

Stack: Next.js, Node.js, TypeScript, MLM, Azure

Most of the source code is under NDA, but I'm happy to discuss architecture decisions, trade-offs, and outcomes.

Connectax

Led the architecture and development of a compliance platform handling complex tax workflows for EU companies operating in Hungary.

Designed a scalable microservices system to improve reliability, maintainability, and regulatory accuracy in a domain with strict operational requirements.

What this solved:
  • Eliminated fragile monolith bottlenecks by decomposing into ~30 independently deployable services
  • Reduced compliance risk through strict validation and auditable processing pipelines
  • Enabled the team to maintain and extend complex tax rules without full-system risk

Role: Lead Software Engineer / Solution Architect

Stack: Node.js, TypeScript, PHP, Python, PostgreSQL, Azure, Kubernetes, microservices (~30 services)

Most of the source code is under NDA, but I'm happy to discuss architecture decisions, trade-offs, and outcomes.

LINDABI CRM

Built a multi-tenant web application with strict tenant isolation and role-based access for predictable delivery and clean internal APIs.

Focused on maintainable architecture and operational clarity in a product with multiple tenant and permission boundaries.

What this solved:
  • Eliminated tenant data leakage risk with enforced isolation at the data and API layer
  • Reduced onboarding friction for new tenants through clean, predictable permission boundaries
  • Made the codebase easier to extend without breaking existing tenant configurations

Role: Full-Stack Engineer / Architect

Stack: Next.js, React, Node.js, TypeScript, PostgreSQL, Docker, Azure

Most of the source code is under NDA, but I'm happy to discuss architecture decisions, trade-offs, and outcomes.

LINDABI Tracking

Built a mobile time-tracking application for construction teams to log daily work hours and activities across different job sites.

Focused on a practical field workflow with reliable mobile data handling and a straightforward user experience for operational teams.

What this solved:
  • Replaced paper-based and spreadsheet tracking with a structured mobile workflow
  • Reduced reporting errors by capturing hours and site activity at source
  • Gave managers real-time visibility into daily output across multiple job sites

Role: Full-Stack Engineer

Stack: React Native, Node.js, TypeScript, Expo

Most of the source code is under NDA, but I'm happy to discuss architecture decisions, trade-offs, and outcomes.

Contact

Have a system that's getting harder to maintain or starting to break? Let's talk.

Book a call / Email me LinkedIn Clever Goat