Jane Olszewska

Role: backend, data, devops, tech lead

Level: senior - staff

• Implemented and launched a GraphQL-based data access layer to ensure data consistency across products
• Deployed an automated integration testing framework, created processes for its use, and trained staff
• Created the official company testing strategy to give clients assurance of data integrity
• Researched corporate law in EU member states to increase the value of the business offering
• Co-ordinated large scale decoupling of services across the organisation, to scale the business and increase its agility
• Productionised a POC product working to a tight deadline, on a stack with no previous experience
• Migrated services across cloud providers, and hybrid clouds, to increase business availability
• Routine upgrades to production apps in order to control tech debt and mitigate security issues

Languages and Standards

PHP 7, SQL, GraphQL,
REST, Python, Java, shell scripting

Libraries and Frameworks

Symfony, Doctrine, Spark, Behat/Mink

Data

PostgreSQL, ElasticSearch

CI / CD

Git, Docker, Marathon, Kubernetes, Helm, Jenkins

Observability

Prometheus, Grafana, Graylog, Newrelic

Techniques

Debugging, profiling,
API design, data modelling,
db query optimisation
Agile (Scrum, Kanban)

Role: backend

Level: mid - senior

• Modernised, modularised and simplified the company's flagship product, a data analysis web application, increasing the speed of feature development
• Improved application customisation features, which won the company several large contracts that contributed significantly to its growth
• Coached junior employees in best practices software engineering, helping company scale through developing hires from local universities

Languages

PHP 5.6, SQL, Javascript

Libraries and Frameworks

Zend Framework, PHPUnit, Mootools

Data

PostgreSQL

Ops / CI

Subversion, Git, Jenkins

Role: full stack, sysadmin

Level: mid

• Developed and delivered a wholesale purchase web store, the largest web project delivered by the company at the time
• Evaluated and benchmarked a selection of frameworks and ORMs, enabling the company to bid for larger contracts
• Modernised the company stack, introduced unit testing and CI, increasing code reliability and security
• Introduced source control, improving disaster recovery

Languages

PHP 5, SQL, Javascript

Libraries and Frameworks

Zend Framework, Propel ORM, PHPUnit, jQuery

Data

MySQL

Ops / CI

Subversion, CruiseControl

Role: desktop application developer

Level: junior

• Contributed to data visualisation components of an airline revenue management application
• Improved user experience of the application by tuning database query performance
• Collaborated in a team distributed over two locations: Dallas, TX and Kraków

Languages

Java 5, SQL

Libraries and Frameworks

Spring Framework, Hibernate ORM,
Java Swing, JUnit

Data

Oracle

Collaboration

Subversion, ClearCase, ClearQuest

Techniques

Db query optimisation,
unit testing, test-driven development,
refactoring, CI/CD,
Agile (Extreme Programming)

AGH University of Science and Technology in Krakow, Poland

• Specialisation: Software and Database Systems Engineering
• Electives incl. natural language processing, information extraction, neural networks, evolutionary algorithms, database management systems, realtime systems, parallel programming

As Katarzyna Olszewska, co-authored with dr Elżbieta Przybył

Published in Studia Religiologica issue # 40/2007

As Katarzyna Olszewska, co-authored with dr Elżbieta Przybył

First presented on a religious studies conference: "Transformacje - New Age w Polsce", 22 November 2005.