Scala Backend Developer/Architect London

Skills

• Agile methodologies
• Akka
• Akka-Http
• Angular
• angularjs
• Apache Camel
• Bamboo
• Bash
• C++
• Cats
• CI/CD automation
• CSS
• Cucumber
• Datadog
• Dbunit
• Deployment automation
• Docker
• Doobie
• EC2
• ElastiCache
• Facelets
• FS2
• FuseESB
• Gatling
• GDPR compliance
• Glassfish
• Golang
• Hibernate
• HSM
• HTML
• Http4s
• Java
• JDBC
• Jenkins
• Jenkins DSL
• JPA
• JSF
• Kafka
• Kubernetes
• Linux OS
• Liquibase
• Maven
• MySQL
• Networking
• Oracle
• Oracle PL/SQL
• Performance testing
• Postgres
• Profiling
• Protobuf
• Python
• RDS
• React
• REST
• S3
• SBT
• Scala
• ScalaCheck
• ScalaMock
• ScalaTest
• Security
• Slick
• SNS
• Spinnaker
• Spring
• Spring Boot
• SQS
• System design
• Test automation
• TIBCO Jasper Server
• Version control (Git/Stash)
• Visual Basic
• Wildfly

Experience

May 2016 - May 2025

Platform Architect at ClearScore

– Monolith deployed biweekly evolved into 250 microservices with fully automated testing and multiple daily deployments
– Applications moved from manual Tomcat deployment on SoftLayer to Dockerized services in AWS with a multi-region Kubernetes cluster
– Transitioned to Kafka and externalized data architecture
– Team expanded from 3 backend engineers to over 100, with structured mentoring, technical talks, and service standards
– Technology shifted from blocking Java handling 1M users to non-blocking Scala serving 20M+ with diverse product offerings
– Testing pyramid improved through TDD, automated API tests, and enhanced monitoring
– Security and GDPR compliance strengthened with automated vulnerability scans, static code analysis, and robust data encryption

Apr 2014 - Apr 2016

Senior JEE Developer at SunGard Financial Systems (now FIS)

– Main responsibilities included developing new features (Java backend, some AngularJS frontend), supporting multi-tenant/multi-database reporting solutions, implementing deployment automation, and creating a Cucumber test framework to replace manual regression.
– Two-week sprints in distributed teams (JIRA used)
– Git/Stash version control with peer code reviews
– Bamboo builds with Maven
– Fully automated deployment to dev and QA environments
– Nightly automated integration tests (Cucumber)
– Database upgrades/creation automated with Liquibase

Sept 2011 - Apr 2014

Technical Architect at Monitise

– Secure mobile payment platform serving as a hub connecting issuers (banks) with Visa Europe.
– Core system: Java (JDK7), Spring, JDBC, Oracle DB, REST, Glassfish
– Integration server: multiple applications with similar technologies, later migrated to FuseESB
– Security: key server backed by hardware HSM, using JPA (Hibernate), Spring, ProtoBuf
– Payment collection site: Facelets/REST with a custom-built CMS

Jun 2006 - Sept 2011

Analyst Developer/Architect at Avantis

– Major provider of mobile value-added services in Poland and Slovakia. System handled over 1,000 SMS/sec, peaking at 10M/day.
– Hundreds of independent dedicated services
– Technologies: Java, Oracle PL/SQL, Spring, Hibernate, JSF, Facelets
– Oracle data warehouse for accounting and reporting

Mar 2005 - Aug 2006

Developer at Transcomp

– GIS applications, OCX components. C++, Visual Basic

Oct 2001 - Oct 2002

Technical Student at CERN

– Ultra-fast burst generator for sampling data (synchronised with the accelerated beam of electrons)
– Linux device driver
– Real-time programming (LynxOS)

Education

2009 - 2011

Computer Science at Warsaw University of Technology

– Faculty of Electronics and Information Technology, Master of Science (2:1)

1997 - 2004

Computer Science at Warsaw University of Technology

– Faculty of Electronics and Information Technology, Electronic Engineer (1st)