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Jaime Calahorrano

@jaimecalahorrano

Staff software engineer at Rothera LL who delivered exchange infrastructure processing $50M+ in daily binary options volume.

United States

Message

At Rothera LL, I used Claude and AI-assisted engineering workflows to accelerate development of a derivatives exchange platform processing $50M+ in daily binary options volume. I also led Kafka-backed surveillance pipelines and a WebSocket event distribution platform for real-time market notifications.

I modernized Python API servers into Rust-powered gateways and built FIX protocol support for deterministic, low-latency order processing. I also automated settlement operations and instrument onboarding.

At SCM Globe, I developed a Rust server-side simulator for supply chain operations and engineered collaboration services using Rust, Redis, Tokio, Kafka, and WebSockets. The engine was deployed to a major US government defense entity.

Earlier, at Microsoft Xbox Activision, I developed Python and C++ segmentation services for Call of Duty backend systems. At Chicago Trading Company, BMO Capital Markets, and Bank of America, I worked on trading data capture, reconciliation, reporting, and financial infrastructure.

Experience

Work history, roles, and key accomplishments

Staff Software Engineer

Rothera LL

Mar 2025 - Sep 2026 (1 year 6 months)

Leveraged Claude and AI-assisted engineering workflows to accelerate development of a derivatives exchange platform processing $50M+ in daily binary options volume. Led architecture of Kafka-backed surveillance pipelines and migration of Python API servers to Rust gateways.

Claude AI assisted Development Kafka WebSockets Rust Python FIX Protocols Event Driven Architecture Low Latency Systems Settlement Automation

Lead Engineer Consultant

SCM Globe

Apr 2024 - Feb 2025 (10 months)

Developed the first industry-wide server-side simulator engine in Rust for supply chain operations in academic, retail, and defense industries. Architected high-performance locking and connection services using Rust, Axum, Redis, Tokio, and Kafka.

Rust Python Redis MySQL AWS Axum Tokio Kafka WebSockets Concurrency Simulation Testing

Lead Engineer

Microsoft Xbox Activision

Oct 2021 - Jan 2024 (2 years 3 months)

Architected and developed segmentation services in Python and C++ for Call of Duty backend services serving 100+ million players. Achieved 30K RPS throughput and led migration from on-premise MySQL to Amazon RDS.

Python C++Kafka MySQL Amazon RDS Segmentation A B Testing Data Pipelines Performance Optimization Rust

Senior Software Engineer

Chicago Trading Company

Nov 2019 - Oct 2021 (1 year 11 months)

Developed trade capture components within Azure infrastructure and improved data collection from major exchanges including CBOE and NASDAQ. Provided hands-on support to quants and traders and initiated C# UI components for data visualization.

Azure C#Snowflake CBOE NASDAQ Data Capture Data Visualization Web APIs Trading Systems

Senior Developer Cross Business Risk

BMO Capital Markets

Aug 2015 - Jun 2019 (3 years 10 months)

Developed a reporting application using C# and SQL Server for executive performance metrics of trading desks. Engineered a reconciliation system in Python and refactored legacy Java applications to improve performance.

C#SQL Server Python Java Multiprocessing Market Data Post Trade Workflow C++Linux Bloomberg TOMS ICAP

Senior Software Developer

Bank of America

Aug 2012 - Aug 2015 (3 years)

Led architectural design and development of Carbon Swift critical system for Swift communication in compliance with Dodd-Frank. Created Sentry, a Quartz/Winform application for real-time insights into Initial Margin and Clearing for Swaps trading.