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Salt Lake City, UT

Riley M. Preslar

Software Development Engineer | AI Tooling, Composite APIs & Enterprise Migration

9 years at Workday building AI assistant tools (MCP), high-throughput data migration pipelines, and enterprise web services.

r.mark.preslar@gmail.com (801) 821-6320
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About

Senior-level execution with measurable enterprise impact

I design and ship production systems that sit at the intersection of AI assistants, composite APIs, and large-scale tenant configuration. Recruiters and hiring managers care about outcomes: scoped agent workflows, security-hardened web services, and migration pipelines that hold up under millions of transactions.

My academic foundation in accounting plus a computer science minor informs how I reason about financial and operational data — not just as payloads, but as business-critical records that must remain correct, comparable, and auditable at scale.

Focus Areas

Core focus & technical stack

Specialized depth in AI assistant tooling, enterprise integration, and high-throughput systems — with a business-fluent foundation.

AI Tooling & Agent Workflows

Model Context Protocol (MCP), Agent APIs, Assistant Workflows, Cursor Integration, Configuration Scoping, Impact Analysis, Record Equality Tools.

Enterprise Engineering & Systems

Integration Web Services, Composite REST APIs, Bulk Data Load Pipelines, Tenant Configuration Migration, Security Remediation.

Architecture & Standards

Performance Profiling, High-Throughput Processing, Automated Testing, Technical Design, Scrum, Jira.

Domain & Academic Foundation

B.S. in Accounting with Computer Science Minor (Brigham Young University) — combining deep technical execution with financial and business data fluency.

Engineering Impact

Highlighted accomplishments

Impact framed for technical interviewers: tools shipped, throughput proven, and risk reduced.

AI Assistant & Agent Integration

Engineered MCP tools and composite agent APIs allowing AI assistants to execute configuration-comparison scoping, record-hash equality checks, and status retrieval directly from tools like Cursor.

High-Throughput Performance Optimization

Profiled and optimized tenant change-tracking algorithms to process 9 million transactions in 14 minutes and 15 million in 19 minutes.

Enterprise Web Services & Security

Built implementation-metadata REST APIs and resolved 50+ security vulnerabilities across Workday student products.

Bulk Data Import Architecture

Redesigned bulk data loaders to support direct batched imports without secondary export steps.

Experience

Professional work history

  1. Workday

    Oct 2023 – Present · Salt Lake City, UT

    Software Development Engineer (Configuration Migration)

    • Built MCP tools and composite agent APIs for AI-assisted tenant comparison and configuration scoping.
    • Added impact-analysis and record-hash equality tools to agent workflows.
    • Shipped REST APIs for implementation-metadata agents with full functional test coverage.
    • Optimized tenant-compare accuracy by excluding unique identifiers from comparison hashes; profiled high-volume change tracking.
    • Streamlined batch import loaders to eliminate redundant export steps.

  2. Workday

    Nov 2017 – Oct 2023 · Pleasanton, CA

    Software Development Engineer (Student Product)

    • Designed transfer-credit evaluation web services and automated program-change re-evaluations.
    • Engineered parent portal access for financial billing and academic record tracking.
    • Served as Scrum Master across three engineering teams, establishing reporting standards and mentoring new hires.
    • Resolved 50+ security compliance violations and enforced strict role-based access control.

  3. Independent Contractor

    Aug 2017 – Nov 2017 · Morgan, UT

    Business Technology Consultant

    • Developed an automated Excel/VBA system transforming work estimates into eight standardized business documents, reducing manual secretarial effort by 80%.

  4. Ernst & Young LLP

    May 2016 – Aug 2016 · New York, NY

    Financial Services Audit Intern

    • Documented SEC financial statements for a multibillion-dollar investment bank and led 5 interns in migrating thousands of files.

  5. Sudbury Capital

    Jun 2015 – Aug 2015 · Dallas, TX

    Hedge Fund Analyst Intern

    • Built financial valuation models for 50+ public companies and presented actionable buy/sell investment recommendations.

Education

Academic background

Brigham Young University

Marriott School of Management

B.S. in Accounting · Minor in Computer Science

Graduated Aug 2017 · Provo, UT