Mykhaylo Khazanovych
Lead Developer Backend, Frontend, BPMN / Administrator
Experience
Lead Developer Backend, Frontend, BPMN / Administrator
Customs Office, Digital Department
- Developed backend, frontend, and BPMN processes in the Atlas Centralised Clearance for Import project
- Defined and implemented REST, JMS, and SOAP endpoints
- Implemented database access with JPA
- Built BPMN processes with Camunda
- Frontend implementation with React
- Configured JBoss via CLI
- Conducted code reviews
- Participated in Communities of Practice for developers and architects
- Implemented frontend-backend communication with WebSockets
Lead Developer / Site Reliability Engineer
Federal Office for Migration and Refugees
- Developed a digital file management system as microservices with Java 17
- Built REST services, accessed MongoDB and GridFS with Spring Data
- Deployed and administered on OpenShift using Kustomize, Helm, ArgoCD, and Flux
- Used Open Policy Architecture for authorization checks
- Configured Knative with Kafka
- Integrated with d3 ECM, S3 storage, semantic entities, and authentication/authorization systems
- Set up CI/CD pipelines with Jenkins and Tekton
Senior Fullstack Developer
Federal Employment Agency
- Migrated a JEE monolith to the cloud
- Replaced a Swing client with an Angular 17 application
- Migrated backend from Payara Server to Payara MicroProfile
- Built CI/CD pipelines with on-premises GitHub Actions
- Conducted code reviews
- Deployed on Kubernetes Ranger
Lead Developer
German Pension Insurance
- Built a design system based on Carbon with components and Storybook
- Documented portal and frontend artifacts with UML
- Developed a microfrontend architecture in an NX Angular monorepo
- Developed a mailbox as a web application and integrated it into the portal
- Created web components with Angular Elements and StencilJS
- Developed backend services with Quarkus and Spring Boot 3
- Integrated OAuth2 via Keycloak
- Coached team members and conducted code reviews
- Set up CI/CD pipelines with Tekton and GitOps on OpenShift using ArgoCD
- Developed mock services with Node.js and Express.js
- Built container images based on Red Hat products and Helm charts
- Wrote unit tests with Jest and E2E tests with Playwright
- Configured code quality checks and accessibility tests with JAWS and axe-core
Solution Architect, DevOps
Rewe Systems
- Replaced a Cobol-based order management system with Java for a retail company
- Designed target architecture for parallel data processing
- Implemented applications and transferred knowledge
- Performed load testing
- Adapted GitLab pipelines and Helm charts for Kubernetes with Rancher
- Created proof of concept in IBM Sterling and Salesforce OMS
- Developed a microservice for HBase API on MapR DB in Kubernetes
- Modeled with UML and conducted enterprise architecture analysis
Software developer in the SAP Forme team
SAP
- Developed an asynchronous backend with Java, Vert.x and Hazelcast
- Database access on MongoDB and SAP HANA
- Integrated with SAP C4S Data Warehouse
- Implemented REST services with OData
- Migrated from Cloud Foundry to Kyma (SAP BTP Kubernetes)
- Implemented sharding for large data blocks in MongoDB and OData model management in the shared memory cluster
Lead developer, team architect, security officer
Bundesagentur für Arbeit
- Developed, administered and secured a rule-based online communication application
- Migrated from WebLogic/DC-OS to Rancher/Kubernetes
- Maintained Jenkins pipelines and created Docker images
- Implemented web interfaces and communication via SMTP, Kafka, REST and SOAP
- Asynchronous message processing with S3, MinIO and Postfix
- Configuration tool for sending rules and archive data transfer
- Used StencilJS and ReactJS
- Pipelines for machine learning document processing with Python
- Migrated microservices to Kubernetes
Solution architect / DevLead / DataOps
Deutsche Bahn
- Designed and implemented a data warehouse and ETL jobs
- Populated a data lake based on Cloudera (Hadoop/HDFS) and Amazon S3
- Provided company KPIs as data marts
- Exposed KPIs via a REST API in OpenShift with OAuth2/OpenID Connect
- Introduced Data Vault 2 and business intelligence with Qlik Sense and QlikView
- Integrated BI graphics into a portal with Vue.js
Solution architect / DevLead / DevOps
Lufthansa AirPlus Servicekarten GmbH
- Designed, implemented, tested and operated a payment system for card payments
- Interfaces to SAP and CRM Dynamics
- Built a Kafka test cluster in Azure Kubernetes Service
- Created Helm charts for Kafka REST
- Jenkins job configuration and DWH integration
- Security with Azure Active Directory, OAuth2/OpenID Connect
- GUI implementation with Angular
Solution architect / DevLead / DevOps
Ing-DiBa
- Built a scalable big data infrastructure
- Developed components for rule-based sending of push notifications over Kafka
- Developed batch and real-time processing pipelines
- Designed and implemented self-contained systems and microservices
- Implemented business processes in a business rule engine
Dev Lead / Solution Architect, Technical Team Lead
Bundesagentur für Arbeit
- Development of a portal application with SOAP Web Services (JAX-WS) and REST backend (Spring Boot)
- GUI development with ADF and Angular 2
- Component library with Angular 2
- Search migration to Elasticsearch
- Architecture documentation and effort estimation
- Security solutions against code injection and session forging
- Coaching juniors, code reviews, and participation in the architecture board
Solution Architect / Operations Architect
Commerzfinanz
- Administration and operation of JEE banking systems on RedHat Linux
- Packaging, deployment, and configuration of high-availability environments
- Monitoring, performance optimization, and error analysis
- 2nd/3rd-level support and release management tools (Eclipse RCP)
- Development of automation web applications and batch jobs with Pentaho and Talend
- Scrum development of various JEE banking systems
Solution Architect
T-Systems
- Implementation of a connected car system for travel information distribution
- Integration with GIS providers Nokia and MapQuest
- Route deviation calculation and performance optimization
- JSP web pages and technical concepts for security and interfaces
Senior Frontend Developer
Conrad Elektronics
- Implementation of web interfaces and Selenium tests for CQ5.6 shop
- Setup of a new e-commerce platform based on CQ5
DevOp
Gruner und Jahr
- Implementation of a DAM system based on CQ5
- JSP pages and workflows, integration tests with Selenium
- CI process monitoring in Jenkins, setup of integration and demo environments
Solution Architect
Commscope
- Design and implementation of features to control mobile network repeaters
- VPN communication support
- JSP, Tomcat, RMI, JDBC and OpenVPN integration
ESB and Backend Consultant
Payback
- Development of scalable data exchange and clearing
- Framework for generating test classes
- ESB integration with Mule, WebLogic, JSF, EJB3 and JPA/Hibernate
Senior Backend Developer, Security/DRM Analyst
Deutsche Telekom
- Development of an online shop and product information system
- Java web services (CXF, REST), JPA2, Hibernate and Spring
- Scalable file storage and DRM with Adobe Content Server
- RDF/Sesam/SPARQL integration
Dev Lead / Solution Architect, Technical Team Lead
Deutsche Telekom
- Reengineering a business process engine in a 25-member JEE project
- Web development, interface design and refactoring
- Coaching, effort estimation and installation scripts
Metasearch Application Developer
Unnamed
- Further development of a metasearch application with Java, Swing, Spring and Hibernate
- Design and implementation according to V-Model XT
Developer
NCR
- Further development, bug fixing and support of retail client/server software
- Java, JPOS, Swing, Hibernate, Spring and Tomcat
- Configuration management, Bash/Ant scripts and Maven migration
Developer
VSA
- Development of a J2EE system for pharmacies
- Web service interfaces for orders and availability inquiries
- MDA-based implementation
Metasearch Rich-Client Developer
Unnamed
- Independent development of a metasearch application with NetBeans, Swing and HSQLDB
Developer
Loyalty-Partner
- Development of a shop for reward sales using Payback points
- UML design with MagicDraw and code generation with AndroMDA
- Hibernate data access and EJB session beans
Developer
Abitero Web Reisen
- Development of a travel review and booking web application with Appfuse, Spring MVC and Hibernate
Developer
Consol GmbH
- Development of an EAI system for prepaid telecommunications providers
- Tibco Business Works, JMS and Web Services integration
Developer
Consol GmbH
- System development for managing phone numbers for mobile providers
- JMS, XMLBeans, Castor and migration jobs for Oracle
Developer
gintec.com
- Specification and partial implementation of middleware for DVB receivers with MHP
- Linux Embedded, DVB API and C++
Developer
Igel Technology
- Development and integration of thin client software on Windows CE and XP
- Bootloader development in C/assembly and BSP customizations
- Reverse engineering tools and multilingual keyboard drivers
Solution Architect
Conject AG
- Conversion of an SAP GUI Scripting-based interface to a newer version
Software Designer and Administrator
SIP GmbH
- Design and further development of the Invention Navigator for patent work
- Image-to-text conversion with OCR control and TIFF conversion
- Full-text indexing with Jakarta Lucene
- Integration of web modules for patent downloads
Developer
PP-Active AG
- JSP/Servlet development for closed user group trade fair portals
- Applet development for Compaq partner support
Developer
CPU AG
- Module development for consumer credit and home savings contracts (C++, Java)
- GUI development and database access (Oracle, DB2)
- Financial math modules and CORBA test projects
Doctoral project
Institut für mathematische Maschinen und Systeme, Kiew
- Development of a voice recognition system with C++ and Delphi
- Application of Fourier transform, spectral analysis, Gaussian distributions and HMM
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Information Technology (8.5 years), Banking and Finance (7 years), Government and Administration (5.5 years), Telecommunication (3.5 years), Retail (2 years), and Insurance (1 year).
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Information Technology (27.5 years), Product Development (13.5 years), Operations (2.5 years), Business Intelligence (1 year), and Research and Development (1 year).
Skills
Architecture
Kubernetes
Big Data
Devops
Angular 15
Rest
Operations
Dwh
Conceptual Design
Cms
Soa
J2ee
Distributed Systems
Team Leadership
Devops
Architect
Fullstack
Cloud
Jee
Machine Learning
Statistics
Java
Python
Angular
Javascript
Sql
Typescript
Front-end
Data Engineering
C++
Languages
Education
Kyiv University
Diploma in Mathematics · Mathematics, Probability Theory and Mathematical Statistics · Kyiv, Ukraine · Grade 1 for thesis, Grade 2 for state exam
Profile
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