Portfolio
A selection of my recent work, including open source contributions and side projects spanning protocol optimization, blockchain infrastructure, and high-performance backend systems.
Open Source & Project Work
Hedera Hashgraph & Hiero Protocol
4 Merged Pull Requests
Contributing to Hedera's Protocol Buffer for Java (PBJ) library and Hiero Consensus Node. Focus on performance optimization, developer experience improvements, and network topology configuration.
Contributions:
DirectBufferedData Performance Optimization (#605)
Achieved 5.6x throughput improvement for large array operations by optimizing bulk comparison threshold from 8 to 32 bytes. Added comprehensive JMH benchmarks and testing framework. First open source contribution.
Improved Proto Import Error Messages (#654)
Enhanced developer experience by fixing error messages to display actual proto type names instead of Java object representations. Added troubleshooting guidance for common import failures.
OneOf Field Handling Investigation (#635)
Conducted comprehensive analysis of switch statement optimization for oneOf fields. Demonstrated that proposed changes would break 10.97% of test suite due to protobuf field ordering requirements. Recommended maintaining current implementation based on performance data.
Configurable Network Topology (#21927)
Added API for configuring mesh and geographic network topologies before node initialization. Implemented builder pattern with immutable configuration records and comprehensive test coverage.
Technologies:
gRPC vs REST Performance Benchmark
Rigorous protocol performance analysis for Hedera-style financial infrastructure. Found gRPC delivers 17-18% higher throughput and 22% better tail latency at 50+ concurrent workers, but REST actually wins at low concurrency. Multi-language clients (Go, Rust, Python) isolate transport overhead from SDK costs. Includes real Hedera testnet validation showing rate limiting and network latency dominate protocol choice at the network layer.
Hiero HCS Replay Library
Go library that captures real message timing from Hedera Consensus Service topics and replays them for realistic load testing. Solves the problem that synthetic load generators miss the bursty traffic patterns that cause production failures. Zero external dependencies, 91.7% test coverage, MIT licensed. Built for the Hiero Apex Hackathon with on-chain proof of functionality.
Hedera Network Analytics Dashboard
ETL pipeline and Dune Analytics dashboard for Hedera network metrics. Built because Dune lacks native Hedera tables. Iterated from batch processing to streaming architecture, reducing memory from 8GB to 500MB and runtime from 20+ hours to minutes. Runs daily via GitHub Actions, visualizing transaction volume, type breakdown, active accounts, and fee trends.
Hedera Network Monitor
Real-time monitoring tool for Hedera network health built in Go. Dual-interface design with REST API and CLI (Cobra). Tracks account balances, network metrics, and sends webhook alerts on configurable thresholds. Integrates with Hedera SDK for direct network queries.
Token Vesting Smart Contract Platform
Full-stack Web3 platform for managing time-locked token vesting schedules. Solidity contracts with 100% test coverage (52 tests), deployed and verified on Base Sepolia and Hedera Testnet. Includes Next.js dashboard for schedule management, Go backend API with PostgreSQL caching, and CLI tools via Hardhat tasks.
AWS Cloud Infrastructure Portfolio
AWS Solutions Architect Associate with hands-on implementations across 5 architectural POCs: serverless e-commerce, data analytics pipelines (Kinesis → Athena), multi-AZ reliable infrastructure, migration strategies, and disaster recovery. Includes a production backup system implementing 3-2-1-1-0 strategy with intelligent file classification and multi-tier storage (S3 Glacier, Proton Drive, air-gapped local). All projects use CloudFormation IaC and least-privilege IAM.
Mission-Critical Systems
SCADA Systems at AspenTech OSI (2015-2024)
9 years of production systems engineering
Spent 9 years optimizing mission-critical power grid control systems that directly impact utility operations and customer service. This foundational experience shaped my approach to building systems that must be reliable, performant, and cost-effective at scale.
Key Contributions:
- • Real-time data processing for millions of customers
- • Database performance tuning (Oracle, PostgreSQL)
- • High-availability distributed systems
- • Build process modernization and DevOps practices
- • Java/C# enterprise application development
This work isn't open source, but it's the foundation of my approach to building production systems that can't fail.
About My Work
Production Mindset
Every project I work on is built with production requirements in mind: comprehensive testing, proper error handling, documentation, and monitoring. I measure success not by initial delivery, but by long-term maintainability and reliability.
Performance-First Approach
I don't optimize blindly. Every change is backed by data: benchmarks, profiling, and rigorous testing. This approach led to the 5.6x improvement in Hedera's protocol buffer implementation and continues to guide my work on high-performance systems.
Systems-Level Thinking
Deep expertise across the backend stack: from protocol design and consensus algorithms to database optimization and cloud infrastructure. This vertical knowledge enables me to identify bottlenecks that single-layer optimization would miss and architect solutions that perform well end-to-end.
Interested in Working Together?
I'm always open to discussing new opportunities, challenges, or just technical problems worth solving.
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