Backend engineer focused on distributed systems and payments infrastructure on AWS.
At Runa I lead technical initiatives in the consumer domain — high-availability, real-time gift-card
fulfillment — driving architecture decisions, design reviews, and observability practices. Promoted to
Senior within two years; happiest owning problems end-to-end, from design through rollout to customer impact.
Software Developer → Senior Software Engineer (promoted Jan 2026), Runa
Nov 2023 — Present · Remote
Runa — payments network for digital value (gift cards and prepaid cards); the consumer team owns
real-time fulfillment. TypeScript, Python, Go, AWS (Step Functions, Lambda, DynamoDB, EKS, CloudWatch), Terraform,
Cloudflare (Workers, WAF, R2)
Lead technical initiatives in the consumer domain — high-availability systems for real-time gift-card
fulfillment; drive architectural decisions and design reviews, mentor engineers on observability best practices
Lead the prepaid (debit) card initiative (100k+ cards issued to date) — designed the card lifecycle
orchestration and the business observability around it
Architected and built a collaborative authorization router — a long-running Go service on EKS, chosen over
our Node.js/Python serverless defaults after evaluating runtimes — that resolves each card authorization from
the issuer to the owning customer and returns their decision within a hard 2s, fail-open budget
(~100 req/s at launch); delivered under a tight timeline for Runa's largest customer
Reduced perceived latency ~70% (50s → 15s) on the most critical user journey by redesigning the flow around
asynchronous background processing
Led the migration from a legacy Python monolith to serverless orchestration (Step Functions, Lambda,
DynamoDB); built a testing framework on Step Functions Local enabling confident validation of data
transformations and failure recovery
Improved throughput ~20% on a key service by optimizing serialization; introduced MSW integration tests for
the consumer web app and third-party clients
Automated incident-response and operational procedures, cutting resolution time 50%+ in key workflows; team
SME for AWS CloudWatch and observability
Bar Raiser; lead both coding and system-design interviews; created the System Design interview preparation
resource used by the recruitment team
Drove features end-to-end from PRD through design to implementation; introduced TestContainers integration
tests to bolster confidence in shipped changes
Led the introduction of MobX and MVVM architecture in a large web app, increasing readability,
maintainability, and development speed
Improved DevX and development speed by introducing WSL2 + Linux local development through a comprehensive
setup script and guide
Software Developer (Intern → Junior), Paysafe
Feb 2021 — Jul 2022
Java 11, Angular 10+, MySQL, Oracle RDBMS
Improved the customer bank-account verification flow via a third-party vendor integration; implemented
IP-based geolocation with MaxMind
Built an internal hiring tool for the HR department, replacing paid subscriptions
Education
BSc Computer Science Sofia University “St. Kliment Ohridski” (FMI) · 2018 – 2022 · Sofia