Armen Sargsyan — Java/Kotlin Software Engineer

Expertise in Back-End Web (8.5 yr.), DevOps (2.5 yr.).

Last verified on April, 2026

Core Skills

Kotlin

4 yr.

Spring Boot

4 yr.

Azure DevOps

2 yr.

Docker

2 yr.

Bio Summary

9+ years of experience in Java and Kotlin software engineering, specializing in microservices architecture, DevOps, and cloud-native applications.
Proficient in Spring Boot, Spring Cloud, Docker, Kubernetes, AWS, and CI/CD pipelines, with hands-on experience in Terraform and Jenkins for infrastructure automation.
Strong background in secure software development, including Keycloak integration, OAuth2, and PCI DSS-compliant cryptographic SDKs.
Expertise in designing and implementing scalable backend systems using Kafka, RabbitMQ, Elasticsearch, and various databases like PostgreSQL, OracleDB, MongoDB, and Cassandra.
Experienced in Agile methodologies (Scrum, Kanban), test-driven development (JUnit, Mockito, Testcontainers), and modern software engineering best practices.

Technical Skills

Programming Languages	Groovy, Kotlin
JavaScript Frameworks	Angular
.NET Platform	Azure
Mobile Frameworks and Libraries	Gson, Ktor
Java Libraries and Tools	Hazelcast, Jackson, JSON, MapStruct, Spring Core
Java Frameworks	Hibernate, Spring Boot, Struts 2
Android Libraries and Tools	Kotlin
AI & Machine Learning	RAG
Security	RBAC
Databases & Management Systems / ORM	AWS ElasticSearch, Cassandra, Clickhouse, Flyway, Hibernate, Liquibase, MongoDB, MySQL, Neo4j, Oracle Database, PostgreSQL, Redis, SQL
UI Frameworks, Libraries, and Browsers	Angular Material UI
Cloud Platforms, Services & Computing	AWS, Azure
Amazon Web Services	AWS API Gateway, AWS ECS, AWS ElasticSearch, AWS Security Groups, AWS SNS
Azure Cloud Services	Azure DevOps
Methodologies, Paradigms and Patterns	Agile, Clean Architecture, Kanban, microservices, Monolith, MVC, Scrum, SOAP
Message/Queue/Task Brokers	Apache ActiveMQ, Kafka, RabbitMQ
QA, Test Automation, Security	Apache Maven, JUnit, Mockito, Postman, SoapUI
Collaboration, Task & Issue Tracking	Atlassian Confluence, Jira
SDK / API and Integrations	AWS API Gateway, GraphQL, JWT, Keycloak, OAuth, RESTful API, Swagger
Version Control	BitBucket, Git, Github Actions
Platforms	Camunda
Deployment, CI/CD & Administration	CI/CD, GitLab CI, Gradle, Jenkins, SonarQube, TeamCity
Virtualization, Containers and Orchestration	Docker, Terraform
Mail / Network Protocols / Data transfer	GRPC, JWT, WebRTC, WebSockets
Third Party Tools / IDEs / SDK / Services	IntelliJ IDEA
Web/App Servers, Middleware	Nginx
Logging and Monitoring	Prometheus
File Systems, Storage	XML
Other Technical Skills	Feign, framework, Spring model-view-controller, Webflux

Work Experience

Senior Java/Kotlin/DevOps Software Engineer - ITSpace (HRSpace)

Duration: September 2023 - December 2025
Summary:

HRSpace is a specialized web and mobile application developed for simplifying and improving human resource management within organizations
The application addresses issues associated with manual and fragmented HR processes such as payroll, performance evaluation, and benefits management

Responsibilities:

Design and implementation of microservices-based architecture from scratch.
Security implementation using Keycloak within a Kubernetes architecture.
Working with project architecture and participating in technical decision-making.
Team coordination and organizing the backend team.
Participating in code reviews and daily Agile ceremonies.
Configuration and maintenance of CI/CD pipelines for deployment services on AWS.
Implementation of service deployment and communication within Kubernetes.
Setting up monitoring tools to track system metrics.

Technologies: Java, Kotlin, Spring Boot, Spring Cloud, OracleDb, MongoDB, FlyWay, REST APIs, WebSockets, Feign Client, RTB, JUnit, Mockito, Kafka, RabbitMQ, Gradle, OpenAPI/Swagger, Docker, Kubernetes, GitLab, Microservice Architecture, Terraform, AWS (S3, EC2, IAM, RDS), Jenkins, CI/CD

Senior Java/Kotlin Software Engineer - ZenifyTech (InvoEase)

Duration: August 2021 - June 2023
Summary:

InvoEase is a financial and accounting solution designed for professionals and law firms
It automates the billing process, payment management, and the generation of financial reports

Responsibilities:

Maintaining existing functionality and adding new features.
Working with legacy code and adapting outdated solutions to meet new requirements.
Optimizing application performance for high-load environments.
Refactoring code to improve structure and readability.
Participating in code reviews and contributing to technology stack decisions.
Solving tasks related to fintech requirements and transactions.

Technologies: Java, Kotlin, Angular, Spring Boot, Spring Cloud, PostgreSQL, MongoDB, Hibernate, FlyWay, REST APIs, OpenAPI Generator, Hazelcast, Gradle, Docker, Prometheus, Bitbucket, Microservice Architecture, Azure, JUnit, Mockito, End-to-End (E2E) Testing

Senior Java Developer - ZenifyTech (CaseSync)

Duration: October 2019 - July 2021
Summary:

CaseSync is a case management system designed to help law firms manage client information, track case progress, and automate scheduling for court appearances
The system aims to improve communication and efficiency between legal teams and clients

Responsibilities:

Maintaining existing functionality and adding new features.
Working with legacy code and adapting outdated solutions to meet new requirements.
Participating in code reviews and improving system architecture.

Technologies: Java, Kotlin, Spring Boot, Spring Cloud, PostgreSQL, MongoDB, Hibernate, FlyWay, REST APIs, OpenAPI Generator, Hazelcast, Gradle, Docker, Prometheus, Bitbucket, Microservice Architecture, Azure, JUnit, Mockito

Junior - Middle Java Developer - WorldPay (Client-Side Encryption (CSE))

Duration: March 2016 - June 2019
Summary:

Client-Side Encryption (CSE) is a Java-based cryptographic SDK developed to secure sensitive payment data such as cardholder details before it leaves the client environment
It encrypts card data using RSA public-key encryption and ensures PCI DSS compliance by preventing raw card data from reaching the merchant’s servers
It was integrated into eCommerce and mobile payment platforms, enabling merchants to perform secure transactions through the Worldpay gateway

Responsibilities:

Implemented and maintained Java SDK components for RSA encryption/decryption logic.
Integrated encryption utilities with Worldpay’s REST and SOAP payment APIs.
Developed unit and integration tests ensuring cryptographic consistency.
Refactored legacy code to align with PCI DSS security standards and new API versions.
Wrote documentation and sample integrations for partner developers.
Testing and fixing bugs.
Collaborated with team members to implement new features and improve system architecture.

Technologies: Java 8, Spring Boot, Spring Security, REST API, SOAP, RSA Encryption, JCA/JCE, JSON, XML, JUnit, Mockito, Maven, Git, Jenkins, Docker, Kubernetes, AWS (S3, EC2), PostgreSQL, SonarQube, TeamCity, Bitbucket, Agile/Scrum

Education

National Polytechnic University of Armenia, Gyumri Branch
Bachelor of Applied Mathematics
2015-2019
National Polytechnic University of Armenia, Gyumri Branch
Master of Computer Science
2019-2021

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