Jaroslav Maša
Software Engineer (End-to-End)
Engineer focused on designing and building production systems with long-term stability in mind. Experienced in taking ownership from architecture decisions through implementation to production operations. Approach prioritizes maintainability, incident-aware design, and trade-offs that reduce system complexity over time.
Key Competencies
End-to-end ownership from architecture through production operations
Production-first mindset with focus on stability and incident prevention
System design that prioritizes long-term maintainability over short-term features
Modular architecture using feature toggles to prevent cascading failures
Trade-off based decision-making that absorbs complexity during design phase
Ability to build systems others can understand, extend, and operate safely
Experience cooperating with developers and architects in regulated environments
Incident-aware thinking and safe iteration practices
Experience
Developer — Mad-Hall s.r.o.
Nov 2025 — Present
Building music distribution platform with focus on stability and maintainability. End-to-end ownership from architecture through implementation.
- Design and implement platform architecture prioritizing long-term stability
- Make trade-off decisions balancing feature development with system maintainability
- Establish monitoring and automation practices for operational reliability
- Implement feature toggle architecture enabling safe iteration and rollbacks
Application Operations Engineer — MONETA Money Bank, a.s.
Jan 2024 — Jul 2025
Owned stability and operational reliability of banking application environments across development, test, and production. Collaborated with development teams and architects on production incidents and system improvements.
- Responsible for continuous availability of Apache/Tomcat application stacks serving 500K+ customers
- Analyzed production incidents and implemented preventive automation reducing MTTR by 35%
- Cooperated with developers on architectural decisions affecting operations in regulated banking environment
- Improved system observability through monitoring instrumentation, increasing incident detection by 60%
Backend Developer — 2Ring
Jul 2023 — Sep 2023
Delivered backend services and REST endpoints for enterprise tooling, with responsibility for code quality and testing.
- Designed and implemented REST APIs serving 50+ enterprise clients with 99.9% uptime
- Participated in architectural review and feedback cycles for enterprise-scale systems
- Established testing practices that reduced production bugs by 70% in subsequent releases
Infrastructure Engineer — Mailprofiler s.r.o.
Sep 2022 — Jul 2023
Responsible for internal infrastructure stability and operational automation.
- Maintained production reliability across Linux/Windows server environments supporting 1000+ users
- Automated operational tasks reducing incident response time from 2 hours to 15 minutes
- Implemented monitoring solutions that improved system visibility by 80%
Featured Project
Music Distribution Platform
End-to-end designed and built platform for label operations and music distribution, in active development since November 2025. Architecture decisions prioritized long-term maintainability and operational stability over rapid feature expansion.
- Feature-based modular architecture with feature toggles enabling zero-downtime deployments
- Designed to prevent cascading failures through proper service boundaries and circuit breakers
- System complexity absorbed during design phase—appears simple as result of correct architectural decisions
- Scalable foundation supporting production workloads with minimal operational overhead
- Reduced manual processes by 85%, saving 20+ hours of team time weekly
- Implemented comprehensive monitoring preventing 90% of potential incidents
Next.jsTypeScriptNode.jsPostgres
Additional Projects
Orbitr
Production-ready Docker-native self-hosting orchestration platform. Makes running Docker applications as simple as installing apps on your phone. Features extension-first architecture, direct Docker API integration, automatic reverse proxy, health monitoring, and modern UI built with Next.js 15 and shadcn/ui.
Portfolio Website
Personal portfolio built with modern web technologies featuring custom cursor interactions, parallax effects, and functional contact form with automated email delivery. Comprehensive test coverage (156 tests) following SOLID principles.
Bookr
Self-hosted SaaS booking platform for creative studios optimized for cost-effective VPS deployment. Multi-tenant architecture with race-condition-safe booking using Redis distributed locks and database transactions. Features Stripe subscriptions, NextAuth integration, and production-optimized deployment running on 2GB RAM VPS.
Tech Stack
languages
TypeScriptJavaPHPJavaScript
platforms
Next.jsNode.jsSpring Boot
infrastructure
LinuxDockerPostgresApache/Tomcat
practices
REST APIsFeature TogglesAutomationMonitoring
Education
SČMSD Humpolec
Computer Science
2018—2022
Languages
CzechNative
EnglishProfessional