Antoan Rusinov
@antoanrusinov
Senior Java backend engineer specializing in high-performance distributed systems and blockchain security.
What I'm looking for
I am a Senior Java consultant and backend engineer with extensive experience designing, building and optimizing high-throughput, low-latency distributed systems for finance, sports data and enterprise clients. I have led architecture and implementation efforts across microservices, cloud-native deployments (AWS, Kubernetes, Docker), messaging platforms (Kafka, RabbitMQ, ActiveMQ) and caching/distributed data solutions, delivering resilient, scalable platforms and measurable performance improvements.
I also bring blockchain and smart-contract expertise—security audits, Solidity, EVM toolchains and L1/L2 patterns—combined with a strong DevOps and observability background (Terraform, GitHub Actions, Prometheus, ELK). I thrive in hands-on teams where pragmatic engineering, operational excellence and continuous improvement drive business outcomes.
Experience
Work history, roles, and key accomplishments
Senior Java Consultant
CMC Markets
Jan 2025 - Present (9 months)
Built a real-time financial data processing system that collects, processes, and distributes trading data, implemented distributed caching, scheduled batch synchronization, message replay for error recovery, and RESTful APIs for external integrations.
Senior Go/Java Consultant
Financial Times
Jun 2023 - Dec 2024 (1 year 6 months)
Developed and supported 250+ microservices using Go and Java, performed performance optimizations and security work, and collaborated with stakeholders to resolve complex system issues across AWS and Kubernetes environments.
Contributed to platform architecture and implemented new functionalities for high-throughput sports data systems, focusing on performance, caching, and infrastructure pipelines across AWS and containerized environments.
Senior Java Consultant
Euroclear Bank
Apr 2021 - Oct 2021 (6 months)
Delivered consulting services to implement new functionalities and resolve customer issues; established DevOps pipelines to enable reliable data flow between bank segments within a Scrum team.
Built a complex fault-tolerant data system from scratch addressing data consumption, fault tolerance, and third-party integrations using Spring Boot, PostgreSQL, and Apache Pulsar in a 13-person team.
Designed and developed a complex dental medical system for ClearCorrect, implementing backend services with Spring, Hibernate, and Microsoft SQL while collaborating across global teams.
Served as backend Java consultant resolving performance issues processing 65M+ records/day, led platform migrations, and implemented features for the internal liquidity platform using Apache Ignite and other technologies.
Java Technical Lead
Scale Focus
Jan 2017 - Oct 2017 (9 months)
Led architecture and performance improvements for mailing and shared services for Shutterfly clients, focusing on scalability, resilience, and high-frequency request handling across monolith and microservice architectures.
Led architecture and implemented low-latency trading features, migrated monolith to microservices, and addressed concurrency and performance challenges using Netflix libraries and Kubernetes.
Senior Java Consultant
Emerging Markets Consulting
Apr 2015 - Jun 2015 (2 months)
Led a three-member team to implement client features across trading and risk management solutions, delivering tailored middleware and BI integration for commodity and finance clients.
Java Architect & Developer
Connectik
Sep 2014 - Apr 2015 (7 months)
Architected and implemented secure social-network features for enterprise clients, focusing on performance, monitoring, and high-security requirements.
Java Developer
Euro Games Technologies
Jun 2014 - Aug 2014 (2 months)
Implemented business logic and new features for online gambling systems, worked on service and model layers, and resolved client-specific issues and bugs.
Architect and Developer
Startup
Feb 2013 - Jun 2014 (1 year 4 months)
Designed and implemented a social network from architecture to deployment using Spring MVC, MySQL, and Hibernate, overseeing end-to-end development.
Java Developer (Freelance)
Freelance
Sep 2012 - Feb 2013 (5 months)
Developed integrations and reporting solutions for international banks, focusing on data integration and reporting accuracy for financial systems.
Education
Degrees, certifications, and relevant coursework
Sofia University St. Kliment Ohridski
Bachelor's Degree, Pedagogy
Bachelor's Degree in Pedagogy obtained from Sofia University St. Kliment Ohridski.
Software University Bulgaria
Certificate, Linux System Administration
Completed coursework in Linux System Administration at Software University Bulgaria.
Telerik Academy
Certificate, Databases
Completed a Databases course covering SQL, MySQL, transactions, Redis and MongoDB.
Pragmatic LLC
Certificate, Java Development
Completed an advanced Java developer course covering Java SE and J2EE topics.
MongoDB University
Certificate, MongoDB for Java Developers
Completed the 'MongoDB for Java Developers' course.
MIT OpenCourseWare
Coursework, Computer Systems Security
Completed coursework from MIT OpenCourseWare on Computer Systems Security (6.858).
Oracle
OCA (Oracle Certified Associate), Java SE 8
Achieved OCA (Oracle Certified Associate) Java SE 8 Programmer I certification.
Adobe
Training, ColdFusion
Completed Adobe ColdFusion training.
UBS (internal training)
Internal Certifications, Compliance & Security
Completed multiple UBS internal certifications including GDPR, Cyber Security, and Anti-Money Laundering modules.
EPAM (internal training)
Internal Certifications, IT Security & Quality
Completed EPAM internal courses such as Data Privacy Awareness, IT Security Awareness, and Quality Management Systems.
Tech stack
Software and tools used professionally
Postman
Runscope
Blockchain
Ethereum
IPFS
GitHub
GitLab
SonarQube
Kubernetes
Docker Compose
Spring Cloud
Docker Swarm
Jenkins
GitHub Actions
MySQL WorkBench
Spring Data
MySQL
PostgreSQL
MongoDB
MariaDB
Cassandra
Visual Paradigm
Gmail
Spring Boot
Spring Framework
Spring MVC
OSGi
Neo4j
Redis
Terraform
Visual Studio
IntelliJ IDEA
PyCharm
Gradle
Apache Maven
Apache Ant
CDI
SockJS
JavaScript
Java
JSON
XML
Logstash
Kafka
RabbitMQ
Amazon SQS
Scheduler API
Apache Pulsar
Grafana
Kibana
Prometheus
MyBatis
Debian
CentOS
Linux
Windows
Apollo
Elasticsearch
Spring Security
Protobuf
JUnit
TestNG
OAuth2
sso
Apache Tomcat
VisualVM
Adobe ColdFusion
SQL
Foundry
Truffle
Chainlink
Arbitrum
Aptos
Sui
Avalanche
Availability
Location
Authorized to work in
Job categories
Skills
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