Błażej Saladra
Częstochowa
Summary
I am a dedicated backend developer with over a decade of experience. I used to work in big companies and startups. I am experienced in Agile methodologies and passionate about Test Driven Development.
Overview
14
14
years of professional experience
Work History
Senior Software Developer
Luxoft
12.2023 - Current
- Outsourced to Glencore plc (Switzerland)
- Collaborating with technical business analysts on the backlog refinement
- Designing and developing features in the commodity management system
- Integrating with the existing system with bidirectional data exchange
- Utilizing microservice and event-driven architectures
- Working with technologies: Java 17, Spring Boot, Hibernate, Oracle DB, Kafka, Kubernetes, Kibana
Senior Systems Engineer
Eucalyptus Labs Inc.
05.2022 - 11.2023
- Planning and leading the development of backend microservices
- Designing and building the transaction indexer for Kadena blockchain
- Developing a mobile application – the wallet for Kadena blockchain
- Setting up the infrastructure, CI/CD, and monitoring
- Utilizing serverless architecture and reactive programming
- Working with technologies: Flutter, Spring Boot, Quarkus, Webflux, PostgreSQL, Websockets, Kubernetes, Jenkins, Grafana, Prometheus
Senior Systems Engineer
Coinomi Ltd.
01.2022 - 04.2022
- Migrating the backend monolith applications to microservices architecture
- Creating the regression test suites
- Developing backend microservices in Java
- Establishing continuous integration process
- Setting up deployment infrastructure, monitoring and alerting
- Working with Java 17, Spring Boot, Jenkins, Grafana, Prometheus
Senior Backend Engineer
Vertex Solutions Sp. z o.o.
03.2021 - 12.2021
- Outsourced to HSBC Service Delivery (Polska) Sp. z o.o.
- Refactoring of the existing code base to introduce modularization
- Developing a banking application, producing reusable libraries
- Coordinating with the frontend and business teams
- Participating in project planning and delivery process
- Working with Java 8, Spring Boot, REST, BDD testing
Senior Software Engineer
Manpowergroup Sp. Z O.o.
10.2020 - 02.2021
- Outsourced to Equinix Poland Sp. z o.o.
- Joining a team working in the international environment
- Maintaining and extending the existing ecosystem of services for the data center management applications
- Working with technologies: Java 8, Oracle SQL, MongoDB, Cassandra, AWS Lambda
Senior Software Engineer
Beta District Sp. Z O.o.
03.2018 - 09.2020
- Outsourced to BitGameLabs (Hong Kong)
- Developing a payments system supporting cryptocurrencies: Bitcoin, Ethereum
- Leading a backend development team
- Maintaining a working system in production
- Working with technologies: Kotlin, GoLang, TypeScript, Terraform, Pulumi, Google Cloud Platform, Kubernetes, MongoDB
Software Engineer
Silicon & Software Systems Sp. z o.o.
10.2016 - 02.2018
- Implementing a backend system for telehealth services
- Cooperating with different departments inside the company
- Analyzing requirements and designing system solutions
- Working with technologies: Apache Karaf, ActiveMQ, Spring, EclipseLink, Quartz, Docker
Java Developer
Micazook Ltd.
09.2012 - 09.2016
- Outsourced to Vubiquity Inc. (London, England)
- Implementing a media content processing system
- Developing in Java (Spring, Hibernate, Vaadin)
- Using MySQL, JBoss Drools, Talend Integration Studio
- Working with an international team using agile methodologies
- Developing in TDD style, creating automation tests
- Integrating with external systems, supporting production
Junior Java Developer
Micazook Ltd.
01.2012 - 04.2012
- Outsourced to On-Demand Services Group Inc. (London, England)
- Enhancing features in an existing J2EE application
- Adding new JSP views
- Working in SCRUM team
- Outsourced to On-Demand Services Group Inc. (London, England)
Junior Ruby Developer
Micazook Ltd.
11.2011 - 12.2011
- Outsourced to SeaChange International Inc. (Eindhoven, Netherlands)
- Implementing features in existing Ruby On Rails application
- Fixing bugs and improving quality of code
- Outsourced to SeaChange International Inc. (Eindhoven, Netherlands)
Junior Java Developer
Micazook Ltd.
07.2011 - 10.2011
- Company Overview: outsourced to SeaChange International Inc. (Eindhoven, Netherlands)
- Implementing performance tests for application under development
- Outsourced to SeaChange International Inc. (Eindhoven, Netherlands)
Education
Bachelor of Education - Computer Science
University of Wrocław
Skills
- Java
- Kotlin
- Scala
- Go
- SQL
- No-SQL
- Web services
- Algorithms
- Microservices
- Agile methodologies
- Bitcoin
- Ethereum
- Test Driven Development
Personal Information
Driving License: Yes
Timeline
Senior Software Developer
Luxoft
12.2023 - Current
Senior Systems Engineer
Eucalyptus Labs Inc.
05.2022 - 11.2023
Senior Systems Engineer
Coinomi Ltd.
01.2022 - 04.2022
Senior Backend Engineer
Vertex Solutions Sp. z o.o.
03.2021 - 12.2021
Senior Software Engineer
Manpowergroup Sp. Z O.o.
10.2020 - 02.2021
Senior Software Engineer
Beta District Sp. Z O.o.
03.2018 - 09.2020
Software Engineer
Silicon & Software Systems Sp. z o.o.
10.2016 - 02.2018
Java Developer
Micazook Ltd.
09.2012 - 09.2016
Junior Java Developer
Micazook Ltd.
01.2012 - 04.2012
Junior Ruby Developer
Micazook Ltd.
11.2011 - 12.2011
Junior Java Developer
Micazook Ltd.
07.2011 - 10.2011
Bachelor of Education - Computer Science
University of Wrocław
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