Open to opportunities

Arsen Asatryan

@arsenasatryan

Message

Senior Java Engineer building fault-tolerant, high-load distributed systems in payments.

Armenia

Message

What I'm looking for

I’m looking for a Senior Java role working on high-load, fault-tolerant microservices—especially in payments/financial domains—where I can improve performance, build event-driven systems with Kafka, and drive cloud migrations with strong CI/CD and mentoring.

I’m a Senior Java Engineer with 5+ years of experience designing high-load, distributed systems in the financial and payment processing domain. I focus on fault-tolerant microservices, event-driven architecture, and performance improvements that eliminate operational bottlenecks and reduce latency.

Across my recent roles, I’ve implemented payment methods via PSP integrations (including Adyen, ProcessOut, and Braintree), and built microservices using Kotlin, Go, and Spring Boot with Kafka for async communication and PostgreSQL for data storage. I’ve also worked on distributed transactional consistency with LRA, and strengthened reliability through patterns like Saga/LRA and cloud migrations using GCP/AWS.

I bring strong database and engineering fundamentals—database partitioning, PL/SQL optimization, CI/CD with enterprise-grade tooling, and production-minded observability. I also enjoy mentoring and training, conducting sessions for students and junior developers in Java, Spring Boot, and SQL.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

GridDynamics

Jan 2026 - Present (6 months)

Worked on HelloFresh payment services, implementing payment methods and PSP integrations (Adyen, ProcessOut, Braintree). Built microservices using Kotlin/Go/Spring Boot with Kafka and PostgreSQL, using Statsig feature flags and GitHub Actions CI/CD.

Payment Processing PSP Integrations Twint Adyen ProcessOut Braintree Microservices Kotlin Go Spring Boot Kafka PostgreSQL Statsig GitHub Actions

Current

Java / Spring Boot Trainer

Current

Smart Code

Apr 2023 - Present (3 years 3 months)

Conduct training for students and junior developers in Java, Spring Boot, and SQL, including preparing educational materials and assignments. Supports code review sessions and mentoring activities.

Java Spring Boot SQL Training Assignment Code Review

Senior Software Engineer

Energize Global Services

Aug 2024 - Jan 2026 (1 year 5 months)

Implemented Long-Running Actions (LRA) across distributed microservices to provide transactional consistency. Migrated services and infrastructure to GCP with Terraform, built Oracle-based purge processing using PL/SQL partitioning, and improved event processing by moving from Kafka to Kafka Streams.

Microservices Spring Boot Oracle Pl SQL Stored Procedures Partition Based Deletion Batch Processing Kafka Kafka Streams Kafka Migration Kafka Performance Tuning JBoss WildFly REST SOAP J2EE Terraform GCP Execution Plan Analysis

Java Full Stack Developer

EPAM Systems

Dec 2023 - Aug 2024 (8 months)

Migrated legacy Spring applications to Spring Boot to improve maintainability and startup performance, and containerized services with Docker. Built microservices, implemented ActiveMQ-based async messaging, and expanded automated QA using Cucumber and Selenium.

Spring Boot Docker Jenkins Microservices ActiveMQ Monitoring Cucumber Selenium PostgreSQL Linux QA

Java Software Engineer

Ithd

Dec 2022 - Dec 2023 (1 year)

Integrated Square (payment gateway) and QuickBooks (finance/accounting) into a furniture and repair services platform. Implemented REST APIs with PASETO token authentication and built AWS S3 file upload functionality backed by PostgreSQL.

Java Spring Boot Square Integration Quickbooks REST APIs Authentication PASETO Upload S3 PostgreSQL

Java Software Engineer

Codeex

Feb 2021 - Oct 2022 (1 year 8 months)

Developed backend services and REST endpoints for MLM, CMS, and e-commerce platforms, including OAuth2 and JWT-based authentication/authorization. Built an MLM network tree using Neo4j and a corresponding frontend visualization, managing database changes with Liquibase.