# Izabela Śmietana

> Software Engineer at Cloudflare

Location: London, England, United Kingdom
Profile: https://flows.cv/izabela

backend development, distributed systems, databases, data processing, performance, JVM, Scala, Java

## Work Experience
### Software Engineer @ Cloudflare
Jan 2024 – Present | London, England, United Kingdom
Analytical Database Platform

### Software Engineer @ Neo4j
Jan 2021 – Jan 2023 | London, England, United Kingdom
- Implemented aggregation and write execution plan operators for pipelined and parallel runtime. Conducted performance profiling, created benchmarks, and analyzed flame graphs for performance enhancements.
- Resolved bugs in the core of a graph database, addressing issues with parallel query execution, task scheduling, caching and JIT code compilation. Collaborated on customer-reported performance concerns, conducting analysis of Java CPU and memory profiles.
- Collaborated on design of Composite Database enabling access of partitioned graphs in a distributed Cypher query; incorporated work on clustering, query parsing, planning and scheduling on top of Neo4j kernel.

### Scala Software Engineer @ VirtusLab
Jan 2019 – Jan 2021 | Kraków Area, Poland
- Migrated over 30 Rest API endpoints contributing to the monolith separation initiative, reducing coupling between two applications, mitigating complex updates and schema changes within the shared MongoDB database.
- Identified and resolved critical issues causing log pollution, resulting in a 90% reduction of false positive error entries. Implemented structured logging and monitoring dashboards, enhancing troubleshooting efficiency.
- Developed an application on AWS Lambda, reducing the time invested in monthly report generation by the recruitment team by 50%. Integrated email notifications to alert about candidate profiles transitioning into an inactive status.

### Scala Software Engineer @ Disney Streaming Services
Jan 2017 – Jan 2018
Remote continuation of earlier work. Cake become part of DSS.

### Scala Software Engineer @ Cake Solutions Ltd - a BAMTECH Media Company
Jan 2017 – Jan 2018 | Manchester, Zjednoczone Królestwo
- Led the development of microservice delivering encrypted content for Android devices in a multi-DRM platform for Disney+ and television. Migrated 10k+ license keys to AWS KMS envelope encryption, integrated CI/CD workflows and system monitoring.
- Executed performance testing and scalability tuning, validating the system’s robustness to support 1M+ of concurrent users with low latency, high availability and resiliency.
- Leveraged proficiency in Scala, functional programming, AWS and Docker; conducted cross-team knowledge sharing sessions.

### Machine Learning Engineer @ Comarch
Jan 2016 – Jan 2016
- Designed and performed data exploration and machine learning experiments applying k-means and DBSCAN clustering algorithms for anomaly detection in 1GB of telecommunications data. Composed ETL pipeline prototype utilizing ElasticSearch, Apache Spark, Machine Learning, Scala.

### Software Developer @ Comarch
Jan 2015 – Jan 2016
- Maintained frontend of bank applications by adapting to API changes, resolving user issues, implementing feature enhancements; used Java, SQL, and JavaScript.

### Software Developer Intern @ Comarch
Jan 2015 – Jan 2015
- Developed an Android Wear Watch Face for ING Business premium customers within the first three months of the internship.


## Education
### Master of Science (MSc) in Computer Science - Engineering of Intelligent Systems
AGH University of Krakow

### Bachelor of Engineering - BE (incomplete) in Computer Science
AGH University of Krakow

### Engineer (Eng.) in Geodesy and Cartography
AGH University of Krakow


## Contact & Social
- LinkedIn: https://linkedin.com/in/smietanaizabela

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Source: https://flows.cv/izabela
JSON Resume: https://flows.cv/izabela/resume.json
Last updated: 2026-04-05