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Hi, I’m William Jones. I’m a senior full-stack engineer focused on payment integrations, API architecture, and building secure, scalable systems across Node.js/TypeScript and modern React frontends. I design end-to-end solutions with strong observability, CI/CD, and security-by-design to support regulated workflows. People often describe me as collaborative and hands-on. I leverage AI/ML techniques for anomaly detection, intelligent routing, and automation to reduce operational load and improve reliability in complex integrations, while mentoring teams and delivering robust platforms that scale with business needs.…Hi, I’m William Jones. I’m a senior full-stack engineer focused on payment integrations, API architecture, and building secure, scalable systems across Node.js/TypeScript and modern React frontends. I design end-to-end solutions with strong observability, CI/CD, and security-by-design to support regulated workflows. People often describe me as collaborative and hands-on. I leverage AI/ML techniques for anomaly detection, intelligent routing, and automation to reduce operational load and improve reliability in complex integrations, while mentoring teams and delivering robust platforms that scale with business needs.

William Jones

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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Hi, I’m William Jones. I’m a senior full-stack engineer focused on payment integrations, API architecture, and building secure, scalable systems across Node.js/TypeScript and modern React frontends. I design end-to-end solutions with strong observability, CI/CD, and security-by-design to support regulated workflows. People often describe me as collaborative and hands-on. I leverage AI/ML techniques for anomaly detection, intelligent routing, and automation to reduce operational load and improve reliability in complex integrations, while mentoring teams and delivering robust platforms that scale with business needs.…Hi, I’m William Jones. I’m a senior full-stack engineer focused on payment integrations, API architecture, and building secure, scalable systems across Node.js/TypeScript and modern React frontends. I design end-to-end solutions with strong observability, CI/CD, and security-by-design to support regulated workflows. People often describe me as collaborative and hands-on. I leverage AI/ML techniques for anomaly detection, intelligent routing, and automation to reduce operational load and improve reliability in complex integrations, while mentoring teams and delivering robust platforms that scale with business needs.

Available to hire

Hi, I’m William Jones. I’m a senior full-stack engineer focused on payment integrations, API architecture, and building secure, scalable systems across Node.js/TypeScript and modern React frontends. I design end-to-end solutions with strong observability, CI/CD, and security-by-design to support regulated workflows.

People often describe me as collaborative and hands-on. I leverage AI/ML techniques for anomaly detection, intelligent routing, and automation to reduce operational load and improve reliability in complex integrations, while mentoring teams and delivering robust platforms that scale with business needs.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Staff Software Engineer at Employment History Inc.

October 1, 2023 - March 1, 2026

Lead end-to-end payment processor integration for a healthcare-adjacent platform by designing Node.js/TypeScript services with webhook management and idempotency keys, and implementing retry/backoff to reduce duplicate charges. Built secure REST APIs and event-driven workflows on AWS with KMS encryption and IAM policies to support regulated data handling and auditability. Implemented tokenization-friendly payment flows and JWT/OAuth 2.0 authorization plus tamper-evident audit logs to improve compliance. Developed a React/Next.js admin console for payment operations with role-based access control and guided troubleshooting to reduce support escalation time. Introduced OpenTelemetry tracing and structured logging across services, creating dashboards and alerts in CloudWatch to speed detection of payment issues. Automated CI/CD with GitHub Actions and containerized deployments using Docker and Terraform for repeatable environments and safer releases.

Senior Software Developer at JPMorgan Chase & Co.

April 1, 2019 - April 1, 2023

Engineered and maintained high-throughput payment and ledger-adjacent services using Java and Spring Boot, emphasizing resilience patterns, idempotent processing, and clear audit trails. Built integration layers for external and internal payment rails using REST and message-driven designs, improving settlement visibility and reducing manual reconciliation effort. Optimized PostgreSQL queries and introduced performance profiling to improve batch processing throughput by ~25% while maintaining strict correctness guarantees. Established automated testing with JUnit and integrated suites, reducing regression defects and improving release stability across distributed teams. Partnered with security and risk stakeholders to implement encryption, access controls, and monitoring aligned to regulated financial workflows.

Software Developer at Cariloop

August 1, 2012 - September 1, 2019

Developed full-stack web capabilities for a benefits platform using JavaScript and React, focusing on secure user workflows and reliable data capture. Implemented backend APIs and data access layers with Java and relational databases, improving system maintainability through modular service boundaries. Added logging, metrics, and runbooks to improve incident response and reduce production issues. Collaborated with product and support teams to translate complex requirements into shipable features, improving stakeholder satisfaction and delivery predictability.