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Chris Repstein

@chrisrepstein

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I build full-stack SaaS platforms for service businesses using React, Next.js, TypeScript, and PostgreSQL.

United States

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What I'm looking for

I'm looking to build practical full-stack applications where I can own features across UI, APIs, data modeling, authentication, and deployment while applying my finance and operations background to real business workflows.

Through WaveNexus Digital Invest, I build and ship full-stack web applications for service-based businesses. I own the lifecycle from requirements and UI/UX through database design, APIs, authentication, and deployment.

I built ServiceDeck, a multi-tenant field-service platform with 25+ relational data models, 30+ API endpoints, granular role permissions, quote-to-invoice workflows, customer approvals, audit trails, and photo uploads.

I also built Nexus Inventory, a mobile-first inventory and logistics system with barcode and QR scanning, Zebra label printing, approval workflows, audit history, scheduled CSV reporting, and validated bulk imports. My background in finance and operations leadership helps me build practical software around reporting, forecasting, workflow, and security.

Experience

Work history, roles, and key accomplishments

Current

Founder & Full-Stack Developer

Current

WaveNexus Digital Invest

Jan 2026 - Present (9 months)

Founded and operate an independent software venture that designs and ships full-stack web applications for service-based businesses. Own the complete development lifecycle including requirements, UI/UX, database design, API development, authentication, and deployment.

React Next.js TypeScript PostgreSQL Prisma NextAuth Tailwind Railway

Current

Finance Manager

Current

RK Auto Group

Jan 2026 - Present (9 months)

Structure and finalize vehicle financing and F&I product offerings, coordinating with lenders to secure customer approvals. Analyze deal profitability and sales performance using reporting dashboards and Excel-based models.

Excel Financial Analysis Compliance Data Security

Branch Manager

Carrier Enterprise

Dec 2024 - Apr 2026 (1 year 4 months)

Analyzed operational and inventory performance data to improve workflow efficiency and reporting accuracy. Built Excel-based reporting models supporting sales analysis, forecasting, and budget planning; managed user access controls and partnered with IT to maintain secure system architecture.

Excel Data Analysis Forecasting Budget Planning Access Control IT Security

Sales Manager

Priority Honda

Feb 2024 - Nov 2024 (9 months)

Tracked KPIs, revenue trends, and performance metrics using CRM dashboards; generated executive-level reports on revenue, gross profit, and forecasting.

CRM KPI Tracking Revenue Analysis Forecasting Reporting

Sales Manager

Cavalier Mazda

Aug 2023 - Jan 2024 (5 months)

Monitored dealership performance data, conducted revenue-trend analysis, and supported system upgrades improving operational efficiency and data security.

Data Analysis Revenue Trend Analysis System Upgrades Data Security

Sales Manager

Hall Automotive

Jun 2020 - Aug 2023 (3 years 2 months)

Directed sales operations using KPI dashboards and performance analytics; analyzed inventory turnover, profit margins, and sales velocity, and led data-driven forecasting initiatives.

KPI Dashboards Performance Analytics Inventory Analysis Forecasting

Head Finance Manager

Capital Automotive Group

Aug 2018 - Jun 2020 (1 year 10 months)

Designed and built an Excel dashboard tracking monthly sales and service KPIs, revenue, gross profit, and forecast vs. actual, automating multi-department reporting with pivot tables, SUMIFS, and VLOOKUP / XLOOKUP.

Excel Pivot Tables Sumifs V Lookups XLOOKUP Dashboard Design KPI Tracking

Tier 2 Technical Support

Apple (Kelly Connect)

Apr 2017 - Aug 2018 (1 year 4 months)

Provided advanced troubleshooting in secure system environments while maintaining strict data-protection and compliance standards.

Technical Support Troubleshooting Data Protection Compliance

Sergeant (E-5)

United States Marine Corps

Jun 2006 - Jul 2014 (8 years 1 month)

Supervised operational teams, managed logistics tracking and mission-readiness reporting, and ensured compliance with operational and security protocols.

Team Supervision Logistics Reporting Compliance Security Protocols