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I'm a backend software engineer with 10+ years building production financial and payroll systems using Node.js and TypeScript. I design APIs, transaction workflows, and distributed backend services that power complex financial calculations. I focus on concurrency control, transactional data systems, and reliable backend infrastructure, and I enjoy collaborating across teams to deliver scalable solutions. I’ve integrated external tax, direct deposit, and payroll services via secure APIs and built front-end interfaces to support payroll processing and reporting.…I'm a backend software engineer with 10+ years building production financial and payroll systems using Node.js and TypeScript. I design APIs, transaction workflows, and distributed backend services that power complex financial calculations. I focus on concurrency control, transactional data systems, and reliable backend infrastructure, and I enjoy collaborating across teams to deliver scalable solutions. I’ve integrated external tax, direct deposit, and payroll services via secure APIs and built front-end interfaces to support payroll processing and reporting.

Collin DeSoto

Back-End Developer, Database Developer, Full Stack Developer, +3

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I'm a backend software engineer with 10+ years building production financial and payroll systems using Node.js and TypeScript. I design APIs, transaction workflows, and distributed backend services that power complex financial calculations. I focus on concurrency control, transactional data systems, and reliable backend infrastructure, and I enjoy collaborating across teams to deliver scalable solutions. I’ve integrated external tax, direct deposit, and payroll services via secure APIs and built front-end interfaces to support payroll processing and reporting.…I'm a backend software engineer with 10+ years building production financial and payroll systems using Node.js and TypeScript. I design APIs, transaction workflows, and distributed backend services that power complex financial calculations. I focus on concurrency control, transactional data systems, and reliable backend infrastructure, and I enjoy collaborating across teams to deliver scalable solutions. I’ve integrated external tax, direct deposit, and payroll services via secure APIs and built front-end interfaces to support payroll processing and reporting.

Available to hire

I’m a backend software engineer with 10+ years building production financial and payroll systems using Node.js and TypeScript. I design APIs, transaction workflows, and distributed backend services that power complex financial calculations.

I focus on concurrency control, transactional data systems, and reliable backend infrastructure, and I enjoy collaborating across teams to deliver scalable solutions. I’ve integrated external tax, direct deposit, and payroll services via secure APIs and built front-end interfaces to support payroll processing and reporting.

Skills

Experience Level

Expert

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Intermediate

Work Experience

Senior Backend Software Engineer at Sonic Web Systems

January 1, 2016 - January 1, 2026

Optimized complex DB2 reporting queries, reducing year-to-date payroll reconciliation processing time by ~20%. Led backend development for a multi-tenant payroll platform supporting 300+ client organizations and thousands of employee payroll records per payroll cycle. Implemented low-level locking, explicit workflow state transitions, and transactional safeguards to prevent race conditions and ensure financial data consistency under concurrent load. Integrated external tax, direct deposit, and payroll services via secure SOAP and third-party APIs, coordinating multi-step backend workflows across services. Built and maintained Node.js APIs and internal web interfaces supporting payroll processing workflows and financial reporting. Diagnosed and resolved production issues involving financial calculations, payroll workflows, and database performance.

Project Manager / Web Developer at Black Note, Inc.

January 1, 2013 - January 1, 2016

Delivered large-scale website features across cross-functional teams, improving stakeholder collaboration and release reliability. Refactored backend systems for performance and maintainability and led frontend/backend integration efforts to ensure robust, scalable deployments.

Web Development Lead at Writing The Web, LLC

January 1, 2011 - January 1, 2013

Drove large-scale web project initiatives, aligned cross-functional teams, and improved release cadence. Re-factored backend systems for performance and maintainability and integrated MongoDB for flexible data storage to support evolving product needs.