Erol Hadzhi

Team: Delta (Trading Engine)

Team size: 3

Tech stack: .Net, Kotlin, Kubernetes, Redis, Azure Storage

Team objective: Modify existing internal exchange into a multi venue FINRA regulated exchange which provides to its clients the best order prices via smart order routing to any other exchange.

Team size: 4

Tech stack: Python, Kubernetes, Kubeflow, vllm

Team objective: Using Kubeflow provide an api that allows

ML Engineers to fine tune vllm compatible LLM models

and later run Inference on the iterations.

Team: Jedi (Hospital)

Team sub role: DevOps

Team size: 6

Tech stack: Java 21+, Spring Boot, PostgreSQL, Cloud Foundry, Concourse, Docker, Kubernetes, Elastic

Team objective: Ensure any failing payments for any scheme have a fast path to healing. Objective met with services that attend to injured payments to which are provided automated and or manual actions after which are performed the payment can be again sent to the payment scheme.

Product: Optanix NMS (Network monitoring system)

Team: RCA (Root cause analysis)

Position: Team lead

Team size: 6

Tech stack: Java 8+, Spring Boot, MySQL, Cassandra, RabbitMQ, Consul

Team objective: Design, implement and integrate (with the already present monitoring and ticketing platform) an automated root cause analysis system using Optanix' vast know-how in outage cause determination.

Result: The brought value is 10 fold reduction in both the manual labor required and the actual time of cause determination during an outage event in a customer's environment.

Product: Trading212 CFD Platform

Team: Real Stocks

Team size: 5

Tech stack: Java 8+, Spring Boot, MariaDB, RabbitMQ, Helios

Team objective: Design, implement, integrate an addition to the CFD platform which enables customers to trade with actual stocks via International Brokers (IBKR).

Result: Expansion beyond CFDs and catering to clients which seek long term growth. Turning the platform into an investment tool that anyone can use, not only the "chosen ones".

Product: ThinkMarkets CFD Platform

Team: Backend

Team size: 3

Tech stack: Java 8+, Spring Boot, MSSQL, Hazelcast, Hibernate, Artifactory, GitLab CI

Team objective: Bring the platform design, development, deployment in house (taking over after an outsourcing company) forming a strong team to serve as a foundation which will further up the performance, security and all around quality of the service provided by the company in addition to bringing the development costs and feature delivery time down.

Result: Major security concerns discovered and addressed. 10 fold decrease in feature delivery time via addition of CI/CD pipeline. A dozen instances of 10x performance gains mainly persistence layer optimizations (adding proper indexing, slow query monitoring, slow query rewriting, etc...).

Product: Trading212 CFD Platform

Team: Trading212 Rally

Team size: 2

Tech stack: Java 8+, Spring Boot, MariaDB, RabbitMQ, Helios

Team objective: Design and build an api with support for a weekly contest among traders based on their daily ROI's with automated prize funding.