OLIVER SHERWIN

• Served as key technical contributor at fintech startup, guiding architecture decisions across multiple domains.
• Engineered Howlite Merchant Portal using Next.js 15 with a focus on modular components for rapid iteration.
• Architected a distributed ledger settlement layer on Hedera Hashgraph, leveraging the Hedera Token Service (HTS) to automate transaction processing and fee distribution with predictable USD-pegged costs.
• Built a real-time settlement proof of concept, provisioning and funding USDC wallets to enable near-instant movement of funds from issuers to healthcare providers.
• Integrated Stripe and Plaid to tokenize bank accounts and map credentials to card and ACH workflows, enabling automated direct debit and settlement flows.
• Created proprietary plugins for WooCommerce and Shopify to deliver custom 'Howlcard' checkout experience.
• Streamlined onboarding process through OAuth-based authentication with Google Login for merchants and consumers.
• Documented core payment APIs (Authorize, Sale, Refund, Void) using Swagger to support development efforts.

• Contributed to refining predictive workforce analytics and anomaly detection models using HRSignal’s proprietary Workforce Insights Engine, improving AI-driven signals for employee retention risk and role-fit scoring.
• Tuned and optimized machine learning pipelines that processed large datasets to enhance accuracy of talent-match recommendations and reduce false positives in predictive outputs.
• Collaborated with engineering and data teams to calibrate response logic and performance metrics for real-time talent analytics used in HR decision-making tools.
• Supported integration of predictive models into production workflows, helping deliver actionable insights for workforce planning and retention strategies.