Miloš Savara

Founded Budgetox as sole developer and built a live personal finance SaaS with accounts, budgets, bank CSV import, recurring bills, and savings goals. Enforced financial correctness with immutable Money types, DB triggers for money scale, GiST constraints preventing overlapping budget periods, transaction audit history, and materialized dashboard rollups in PostgreSQL. Built BulkX with source-generated PostgreSQL COPY writers and benchmark gates for high-volume CSV and transaction imports, replacing slower EF paths in live production. Delivered ECB multi-currency with triangulation and persisted transaction rates, FusionCache with MemoryPack serialization, Stripe billing, and idempotent webhooks. Enforced tenant isolation via EF Core filters and PostgreSQL RLS, advisory locks for concurrent balance updates, shipped on Linux with .NET 10 Blazor Server, Redis, Hangfire, and GitHub Actions with 500+ automated tests.

Architected distributed IoT/ITS platform with custom .NET 10 MQTT broker, real-time algorithm engine, REST API, and 8+ Linux systemd microservices processing high-volume events from edge IPCs and Jetson devices on PostgreSQL. Designed convention-based MQTT routing with 90+ JSON Schema-validated device parsers, enabling plug-in extension of new edge hardware without broker core changes. Built ANPR/OCR vision ingest with hybrid RSA/AES encrypted JPEG frames in GCS, immutable detection records, human-review revision overlay, and confidence scoring. Implemented real-time traffic algorithms with 100ms coalescing, anti-flapping, MQTT-driven LED, GPIO, and traffic-light control, plus multi-layer broker security with topic ACLs and throttling interceptors. Optimized PostgreSQL for high-ingest IoT workloads with EF context pooling and covering indexes on time-series readings. Owned Linux production with Bitbucket CI/CD, single-file .NET publishes, zero-downtime deploys, Hetzner cloud-init, architecture reviews, and mentoring for a team of 5.

Owned reliability, performance, and financial security of the real-money gaming platform covering player wallets, live betting, and jackpots. Integrated 15+ payment gateways including cards, e-wallets, crypto, and vouchers through REST and proprietary protocols. Implemented transaction safety with idempotency, rollback, reconciliation, and anti-fraud controls. Optimized Microsoft SQL Server and application logic for sub-second response under peak load. Managed AWS and Azure production environments, CI/CD pipelines, and JIRA, delivered production rollout behind China's firewall, and led payment provider coordination with government certification and regulatory audits to secure operating licenses across multiple countries, mentoring a team of about 12 developers.

Led Dynamics CRM implementations for Slovakia's largest mobile operator and a major insurance company, including delivery planning and client communication. Built SSIS migration from 8 legacy systems and extended CRM with plugins, workflows, forms, and JavaScript (Dynamics CRM 2013-2015).

Designed and delivered nationwide blood-collection management system in C# and WPF with Microsoft SQL Server. Owned WPF client application and SQL Server 2008 R2 backend including schema, stored procedures, reporting, and audit trails. Supported national rollout and four years of production operations across Slovakia.

Customized Dynamics CRM 4.0 for Essox loan and credit-card processing with plugins, workflows, JavaScript, SSRS, and data migration.

Contributed to Windows Forms and PostgreSQL desktop application (Pyrobatis IS) and supported legacy gaming software.