Kamil Essekkat
⚙️Software Engineer 💡Product Owner
Software engineer specialized in Python and Java/Kotlin. I'm an automation enthusiast and Continuous Delivery proponent. Worked as a dev in various environments and as a product manager.
Work experience
Freelance Developer
Various projects, for shorter timeframes
- Python project for a mail provider: Falcon, Postgres, Docker
- Python project in commerce: Azure, Azure Functions, FastAPI, CosmosDB. Read more .
- Python project, e-commerce: Django, Django Rest Framework, Docker
- Python project, infrastructure services: Django, Django Rest Framework, Kubernetes, GCP
- Process advisory and development, database proxies: Java 8, Gradle
Product Manager
PM role in a Scrum team, responsible for a client-facing payment product.
- Global product, present on multiple continents
- Scrum (but really)
- Mostly internal stakeholders
Senior Software Engineer
Development, planning, coordinating a team in a software house.
- Direct work with an external client
- Streamlining architectural evolution of a production system
- GraphQL
- MongoDB
Python Developer
Development/maintenance of microservices for an e-commerce service provider.
- Designing and implementing new services
- Implementing data extraction feature across multiple systems
- Building on a Python and MongoDB stack
Kotlin Developer / DevOps
Creating backend for a small, unfunded startup in the business of real-world events
Non-Functional/Performance Engineer
Finding and aiding in fixing of performance bottlenecks in a payment processing system.
- Evaluating performance of a Java EE product
- Refactoring internal tool to leverage Spring’s DI functionality
Software Developer
Maintaining backend applications for ipla.tv VOD portal (one of the biggest in Poland). Green-field development of a new payments gateway.
- Initial domain modelling and requirements gathering
- Architecture design and technology decisions
- Successful integration of Camunda BPM, Spring, and Axon Framework
- Introducing BPM software in department
- Tech leading of a small development sub-team
- Leading the use of Event Sourcing and Domain Driven Design
- Creating automated tests with SoapUI for JSON-RPC and SOAP interfaces
- Performance tuning of new features - on application and SQL DB levels
- Streamlining Jenkins CI jobs with use of scripting
- Taking care of current issues on a live system
Technical Architecture Team
Streamlining the development process in major integration project for a leading Polish telecom. Conducting performance testing and tuning.
- Maintenance and development of project’s internal tools (Python, bash)
- Maintenance over applications built on JBoss and OracleDB stack
- Performance tuning of OracleDB (both on query and instance levels) and of JVM
- Conducting efficiency tests on product from planning to reporting
- Creating build pipelines around Subversion and Jenkins
- Integrating OpenLDAP onto existing project’s infrastructure with continued service availability
- Working closely with Development and Test teams on adjusting the development/release process
Skills
Programming
Databases
Delivery
Other
Clouds
Certifications
Professional Scrum Product Owner I
Projects
Export Kindle Vocabulary Builder into markdown files
Toy web site with counters to teach myself Svelte.
Queue implementation with deduplication and quiet period features. Used to solve a problem while consuming a queue. Hosted on GitHub and deployed to Maven Central.
Small helper library for using telegraf/InfluxDB with Falcon APIs.
Spoken languages
Education
unfinished bachelor, MIESI
Other
Brief introduction to Event Sourcing and CQRS as a lead to Axon and hands-on exploration of Axon's concepts and usage. Outdated.
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