Oleksandr Chumachov
Architect / Lead / Developer
Extensive architectural, programming, and leadership experience
Full stack expertise with technologies including AWS, Docker, Java, JavaScript, Linux/Shell, SQL/RDBMS, and NoSQL
Self-motivated, goal-oriented, meticulous about code quality, quick, skilled in management, and domain-focused
Skills
Architecture
- Microservices
- UML
- C4
- Streaming
- Messaging
- Pub/Sub
- Cloud
- Event Driven Architecture
- CAP
- SaaS
- PaaS
- CQRS
- Saga
- Sharding
- Replication
- Scaling
- Tracing
- OAuth
- OpenAPI
- AsyncAPI
- Cloud Computing
Programming Languages
- Java
- Go
- Kotlin
- Groovy
- JavaScript
- TypeScript
- Python
- SQL
- sh
- C++
- C#
- PHP
JVM
- Spring
- Spring MVC
- Spring Security
- Spring Data
- Spring Cloud
- Hibernate
- JUnit
- J2EE
- JDBC
- JMS
- JPA
- JSP
- Servlets
- JAXB
- JAX-RS
- Apache Camel
- Tomcat
- JBoss
- GlassFish
- Struts
- GWT
- Echo
Build tools
- npm
- Gradle
- Maven
- Make
- Ant
Backend Development
- Object-oriented programming
- Test Driven Development
- GRASP
- SOLID
Web
- HTML
- CSS
- XML
- XSLT
- XPath
- JSON
- AJAX
- GraphQL
- WebSockets
- Angular
- VueJS
- JQuery
- canJS
- prototypejs
Databases
- Postgres
- MySQL
- Oracle DB
- MariaDB
- MongoDB
- DynamoDB
- InfluxDB
- Prometheus
- Redis
- Casandra
- Neo4j
- ClickHouse
- ElasticSearch
Source Control
- Git
- CVS
- SVN
Amazon Web Services (AWS)
- EC2
- IAM
- S3
- EKS
- MKS
- KMS
- ELB
- Route 53
- Lambda
- DynamoDB
- ElastiCache
- etc
Messaging and other
- Kafka
- RabbitMQ
- ActiveMQ
- Kafka Streams
- NATS/JetStream
- Zookeeper
- Consul
Containerization
- Docker
- Kubernetes
CI/CD
- Jenkins
- Bamboo
- TeamCity
Etc
- Grafana
- Jira
- Confluence
- PlantUML
- Cloudflare
- GitHub
- GitLab
- Backstage
- Bitbucket
Work Experience (12)
Oct 2024 - Current
Software Architect
PIN-UP/RedCore
Preparing architecture visions for various projects and services
- Go
- Python
- JavaScript/TypeScript
- Asterisk
- Microservices
- NATS/JetStream
- AWS: EKS, S3, etc
- PostgreSQL, Redis, MongoDB, ElasticSearch, ClickHouse
- Docker, K8N
- git
Jul 2024 - Oct 2024
Java Developer
ARRISE
Implementation of new features
- Java
- Microservices
- Docker
- RabbitMQ
- PostgreSQL, Redis, Prometheus
- maven
- git
- consul
Feb 2023 - Jun 2024
Solutions Architect
Raiffeisen Bank UA, Ukrainian Processing Center
Architectural solutions, Team management, Code review, Integrations with internal and 3rd party systems
- Microservices
- Kafka
- AWS
- Docker, K8N
- Java, JavaScript/TypeScript, Python
- PostgreSQL, DynamoDB, S3, Redis, Prometheus
- gradle, maven
- git
Apr 2021 - Jan 2023
Java Developer / Architect
Reach Financial
Architectural solutions, Development new functionality, Bug fixing, Code review, Integrations with 3rd party systems
- Microservices
- Kafka
- AWS: EKS, EC2, KMS, MKS, S3, etc
- Java: Spring, Hibernate, JPA etc
- Gradle
- MySQL, Redis, Prometheus
- Docker, K8N
- git
Aug 2016 - Apr 2021
Architect / Software Developer
Lexalytics, Inc. an InMoment Company
Architectural solutions, Total re-design and then implement of the system with splitting monolith to microservices, Develop administrative web portals
- Microservices
- SaaS
- AWS
- Java(Spring, Hibernate, MyBatis etc)
- JS (typescript, angularJS, nodeJs, npm)
- C++
- C#, Excel Plugin
- Maven
- Postgresql, MariaDB, Redis, InfluxDB, Prometheus
- Docker
- RabbitMQ
- Chef, knife, shell
- svn, git
Apr 2012 - Aug 2016
Dev Lead / Software Engineer / Tech Lead
Omnigon Communications LLC
Architecture solutions, Task planning, Development, Code review, DevOps support, Meeting with clients and involving in functional decisions
- AWS: EC2, S3, DynamoDB
- shell
- mvn
- CQ/AEM
- java (Spring, Hibernate etc)
- Groovy
- MongoDB
- JS (canJS, requireJS, JQuery, etc)
- HTML/CSS (LESS and SASS)
- Zookeeper
- svn, git
Dec 2011 - Apr 2012
Java (LifeRay) Developer
Krusche & Company
Features development, Bug fixing
- Java (spring, hibernate)
- Liferay
- Javascript
- Ant
Jan 2010 - Dec 2011
Team lead / Architect / Manager / Java Developer
Sintez Technologies
Features planning and development, Sprint planning, Task management, Documentation writing, Communications with project owners
- Java (EE, EJB, Servlet, GWT, Vaadin)
- GlassFish
- Flash/Flex
- Postresql
- Maven
- linux, shell
- svn, git
Nov 2008 - Dec 2010
Java Developer / Software Architect / Team Lead
GeeksForLess
Task management, team leading (code review, helping with studies etc), Architecture solutions, Feature development & bug fixing
- Java (Spring, EE, GWT, Echo, Jsp, Servlets, Hibernate)
- Maven
- linux, shell
- MySQL, Oracle
- SVN, GIT, Jira, Maven, Ant
Jun 2008 - Nov 2008
Java Developer
TemplateMonster.com
Development java application sites.
- Java (EE, EJB, JPA, GWT, Struts, JSP, Servlets)
- MySQL
- SVN, CVS
- linux
- JBoss
- ant
Jun 2007 - Jun 2008
Interface programmer's Department Manager
TemplateMonster.com
Mostly supervising. From time-to-time development on PHP and Java EE, Html, CSS
0Nov 2006 - Jun 2007
Interface programmer
TemplateMonster.com
Front end development with small part of PHP and Java EE
- HTML, CSS
- JavaScript
- PHP
- Java (EE, EJB, JPA, GWT, Struts, JSP, Servlets)
Projects (5)
T.com
Online shop of digital works
TemplateMonster
Biggest web templates online shop
Audubon
Online bio encyclopedia
Semantria
NLP SaaS
PGATour.com
Official Golf Portal
Education (1)
2001 - 2007
Information systems and technologies
National University of Shipbuilding
Certificates
M101J: MongoDB for Java Developers
10gen
Languages
English
Fluent
Russian
Native speaker
Ukrainian
Native speaker
German
Beginner
Interests
Sports Fan
- Football
- American Football
- Basketball
IoT
- ESP32
- Arduino
- Electronics
- Microcontrollers
Etc
- Audiobooks
- Movies & TV
- Hiking