Maxim Yafimau-DevOps
Check rate
Experience
DevOps
As a DevOps engineer, I handled backend development and managed the RabbitMQ cluster in Kubernetes.
Responsible for Kubernetes configurations, including switching Ingress, service management, and deployments.
Contributed to implementing a CI/CD pipeline for services and a technical pipeline to manage database schemas.
Performed performance optimizations, for example reducing a batch process runtime from 10 hours to 30 minutes.
Took on frontend development, including custom components and forms.
Technologies: Kotlin 2, SpringBoot 3, Hibernate, Flyway, JUnit5, Gradle 8, MockK, Angular 18.
SaaS/PaaS: Docker, OpenShift, Kubernetes, Cloudfoundry; Platform: On-prem, MSSQL, Kubernetes (Service, Ingress, LoadBalancer, Helm), RabbitMQ; AWS, EKS, Terraform; Devtools: CI/CD (GitLab), Sonar, ELK, Alerting (Prometheus), Grafana, TLS; OOP/Functional, SOLID/GRASP.
JSF Developer
Created JSF UI components and built UIs using JSF (PrimeFaces 11).
Implemented a custom LDAP authentication.
Performed backend performance optimizations with JPA/Hibernate.
Technologies: Java 17, Maven, EJB, PrimeFaces 11, LDAP, Oracle.
Devtools and tools: IDEA, Eclipse, IBM RAD, Gradle, SVN, Git, Mercurial, TeamCity, Jenkins, FindBugs, PMD, Sonar, Android tools, JIRA, Confluence.
Platform: Monolith.
Java/Spring Developer
Enhanced existing web portal solutions as part of a 7-member team.
Quickly got up to speed with a complex Java-Spring-based technology stack.
Used Java, Spring, Hibernate, Maven, LDAP, Oracle.
Platform: On-prem, Azure (usage), Liquibase.
Principles: OOP, SOLID/GRASP.
Freelance DevOps
Migrated from a monolith to microservices; responsible for the full architecture of the new service.
Switched to the Chain of Responsibility pattern and dynamic Spring Beans; convinced the team to use the Single Responsibility Principle.
Updated certificates and ensured data consistency in a REST architecture without distributed transactions.
Technologies: Java 8, SpringBoot, Spring, Hibernate, JUnit5, TLS.
Devtools: ELK, alerting (Prometheus), Grafana; Platform: On-prem, Docker, OpenShift, PostgreSQL, AWS SNS, LoadBalancer; OOP, SOLID/GRASP.
Freelance Software Engineer
Participated in transitioning a monolith from one service provider to another.
Main responsibility for backend development and developer coordination.
Organized internal clean code trainings; designed the CI/CD pipeline.
Coordinated the team, conducted technical interviews with new colleagues, led grooming sessions and deployments.
Technologies: Java 6, JSF 1.2, Spring 3, Hibernate 3, Spring Batch, JUnit 4, Mockito, REST, SOAP, Flyway.
Devtools: Jenkins, Sonar; Platform: On-prem, DB2, WebSphere, Tomcat; Principles: OOP, SOLID/GRASP.
Software Architect, Technical Lead
jambit gmbh
Developed a microservice to handle payment transactions for a Bavarian car manufacturer.
Scaled the team from 2 to 7 members; designed solutions and optimized project workflows.
Backend and frontend development, code reviews, refactoring, and coaching team members.
Built a prototype and coordinated with other microservices.
CI/CD (deployments) and general development.
Technologies: Java 8, Spring Boot, JUnit, Angular 4, Cucumber, Rest Assured.
Devtools: ELK, CI/CD (Jenkins), Sonar, alerting (Prometheus), Grafana; Platform: Cloud Foundry, Docker, Kubernetes; DB: PostgreSQL; Principles: OOP, SOLID/GRASP.
Senior Consultant
movento gmbh
E-commerce project for a Swiss retailer.
Developed Hybris e-commerce projects; implemented new features in the e-commerce and PCM areas and set up asynchronous and synchronous interfaces.
Technologies: Hybris, Spring, Hibernate; on-premise deployment.
HMI Developer
e.solutions gmbh
Software development for various 'Nordseite' HMI infotainment systems; developed applications and Android apps in the automotive sector.
Developed CAN-based communication interfaces; prototyped solutions.
Technologies: Java 1.4, TCP/IP, CAN, BAP, OSGi, Android 4, JUnit; embedded deployments.
Java Developer
Sam-solutions gmbh
Developed and refactored core modules for SRM (Supplier Relationship Management).
Collaborated with 2 PMs in Munich, 10-15 developers in Minsk, and 4-8 QA engineers in Munich and Minsk.
Supported and enhanced the monolith.
Technologies: Java 6, Spring, Hibernate, REST, Oracle; on-premise deployment.
Junior Java/Groovy Developer, XSLT Developer
Built a web app for product management to automate product search and creation in a one-stop shop and to publish the product catalog.
Designed XSL scripts and corrected Java code.
Technologies: Spring 2.5, Hibernate 3, Scriptella, JUnit, MySQL, PostgreSQL.
Industry Experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Automotive, and Retail.
Business Area Experience
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Experienced in Information Technology, Product Development, Procurement, Supply Chain Management, Project Management, and Operations.
Summary
After more than 12 years of experience in software development, I work as a freelancer. The solid foundations in math and programming logic that I learned at the Belarusian State University of Informatics and Radioelectronics support me in my daily work. I appreciate clean code and mountain climbing and am looking for interesting projects with a focus on teamwork. My professional focus is on designing and implementing cloud-native/Kubernetes solutions (J2EE, J2SE).
Skills
Programming Languages:
- Kotlin
- Java
- Groovy
- Python
- Xslt
Other Skills:
- Oop
- Solid
- Grasp
Technologies:
- Kubernetes
- Java Se
- Servlets
- Jsp
- Jdbc
- Jsf
- Android
- Spring (Core, Mvc, Batch, Integration)
- Hibernate
- Sql
- Web Services (Jax-ws/jax-rpc)
- Soap
- Rest
- Json
- Js
- Html
- Css
- Jaxb
- Xml
- Xpath
- Xslt
- Junit
- Log4j
- Uml
- Osgi
Saas/paas:
- Docker
- Openshift
- Kubernetes
- Cloudfoundry
Ide/tools:
- Idea
- Eclipse
- Ibm Rad
- Maven
- Gradle
- Svn
- Git
- Mercurial
- Teamcity
- Jenkins
- Findbugs
- Pmd
- Sonar
- Android Tools
- Jira
- Confluence
Languages
Education
Belarusian State University of Informatics and Radioelectronics
Diploma: Systems Engineer · Artificial intelligence · Minsk, Belarus
Certifications & licenses
CKA-CKAD
SRE
Udacity online
CKA Certified Kubernetes Administrator
LF-p0mdii9y51
CKAD: Certified Kubernetes Application Developer
LF-nu5ukswmme
PCA: Prometheus Certified
LF-opv6a8xurn
Advanced Cloud Engineer IT Professional Program (Tekton, GitOps, Devops)
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