Hey, I'm Kevin!

A Software Engineer with 7+ years of experience across financial and enterprise software, including payment processing, banking systems, and merchant services. Currently based in Scottsdale, Arizona.

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Kevin C, Software Engineer based in Scottsdale, Arizona specializing in payment systems

Impact

Measurable results from real-world systems I've built and scaled.

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Monthly Transaction Volume

Processing over $1M in monthly payment transactions through merchant services APIs.

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Active Users

Mobile payment applications serving 5,000+ active users with 99.5% uptime.

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Throughput Improvement

Optimized payment API performance, boosting transaction throughput by 40%.

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Daily Active Users

Banking platform supporting 500K+ daily users with event-driven microservices.

Featured Projects

Real products, real users, real results: from payment platforms to a game engine built from scratch.

Mobile • Fintech

WAVit Payments

Lead Developer • MiCamp Solutions

Native Android and iOS payment app for merchants, integrating SDKs for Clover, PAX, and Dejavoo terminals with oauth 2.0 and REST/SOAP backends, processing secure transactions at high volume while maintaining PCI compliance.

5,000+active users
99.5%uptime
+40%throughput
Kotlin Java Swift .NET SignalR
Watch the video tutorial

Game Dev • Side Project

Desert Chronicles: The Arizona Artifact

Solo Developer • Zero frameworks, zero libraries

A retro top-down adventure game with a custom-built engine in vanilla JavaScript: game loop, entity-component system, tile-based maps, collision detection, input handling, and a Web Audio sound manager, all written from scratch.

100%vanilla JS
10+engine modules
0dependencies
JavaScript (ES6) Canvas API Web Audio OOP Design
Play the game

Web • This Site

kev-c.dev

Designer & Developer • Hand-coded, no build step

This portfolio itself: a custom scroll-animation engine built on IntersectionObserver, a canvas particle system, adaptive header theming, and full structured-data SEO, all in dependency-free HTML, CSS, and JavaScript.

0frameworks
11animation systems
A+SEO markup
HTML5 CSS3 Vanilla JS Schema.org
View on GitHub

What I Do

I build secure, scalable software solutions that solve real business problems. My experience spans:

Payment & Merchant Solutions

Building transaction systems and mobile applications, including the WAVit Payments app, for payment terminals (Clover, Pax, Dejavoo) serving 5,000+ active users

High-Performance APIs

Creating high-availability REST APIs handling millions of weekly transactions

AI Integration

Integrating AI language models to enhance payment processing systems

Technical Skills

Languages

Java Python JavaScript TypeScript C# PHP

Frontend & Mobile

React Flutter Android (Java/Kotlin) iOS (Swift) HTML CSS

Backend Frameworks

Spring Boot Node.js .NET ASP.NET Core SignalR Apache TomEE

Databases

SQL Server MySQL Firebase (Auth, Realtime DB)

Cloud & DevOps

AWS Azure Docker Jenkins Git GitHub CI/CD Pipelines

Testing & Tools

Postman JMeter Automated Test Suites JUnit (Unit Testing) Power BI Jira Confluence

Payment & Merchant Services

Payment Gateway POS Systems PCI Compliance SDKs Integration

Architecture & Methodologies

Microservices REST SOAP MVC MVVM Agile Scrum Technical Leadership

What People Say

Kevin is technically proficient, quickly adapting to new technologies and offering innovative solutions to complex problems. His dedication to the quality of work is evident in every project he undertakes. His ability to explain technical details in an accessible manner has been invaluable in bridging the gap between our technical team and other departments.

JQ

Jose Quintana

Software Developer • MiCamp Solutions

Kevin consistently demonstrated strong technical skills, contributing significantly to our project's success with his expertise in various programming languages and innovative problem-solving abilities. He is a team player, always ready to lend a hand and share his knowledge, creating a positive and inclusive atmosphere in our team.

KR

Karthik Ramaraju Kosuri

Technology Lead • Scotiabank

Kevin is a hard-working individual who knows how to get the job done effectively. He works well as a part of a team and can take responsibility working independently. He has good communication skills and was always learning about new technologies that he applied in his work.

CC

Carlos Castrillon Martinez

HR Analytics Coordinator • Teleperformance

Current Focus

As a Senior Software Engineer at MiCamp Solutions in Scottsdale, I'm leading development of payment transaction systems. I'm also exploring AI and Machine Learning to enhance our payment processing capabilities.

Payment Systems Agile Leadership AI/ML
Kevin Casas's focus on Payment Systems, Agile Leadership, and AI/ML integration

Professional Journey

MiCamp Solutions

Senior Software Engineer

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Scottsdale, Arizona (Hybrid)

Nov 2024 – Present

  • Serve as backend architecture lead for merchant services APIs, designing and scaling payment processing systems across multiple payment terminals (Clover, Pax, Dejavoo) and gateways while maintaining PCI compliance
  • Drive technical decisions for the payment processing feature roadmap, collaborating with cross-functional teams (sales, operations, compliance) to balance business needs with technical constraints and risk mitigation
  • Establish code quality standards and mentor 3 junior developers on CI/CD best practices, design patterns, and automated testing, reducing deployment time by 30% and improving release stability
  • Re-platformed legacy services from international teams into AWS, improving scalability and reducing recurring infrastructure cost by 40%
AWS (Lambda, EC2, S3, IAM, Cognito, EKS) SQL Server CI/CD Pipelines MVC MVVM Payment Gateway POS Systems .NET ASP.NET Core C# Postman Automated Test Suites Technical Leadership PCI Compliance

MiCamp Solutions

Software Engineer

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Scottsdale, Arizona (On-site)

Jan 2023 – May 2024

  • Lead developer on the WAVit Payments Android app, building mobile applications using Java, Kotlin, and Swift, integrating SDKs, Firebase, REST and SOAP services, growing the user base to 5,000+ users while maintaining 99.5% uptime and processing secure transactions at high volume
  • Improved transaction throughput by 40% by implementing optimized payment APIs synchronization using SignalR, leveraging SQL Server for persistent storage and enabling seamless multi-terminal deployments
  • Designed and deployed Azure DevOps CI/CD pipelines for .NET applications, configuring build, test, and release stages with automated test execution and deployment gates, enabling rapid Agile delivery while maintaining stability
Android (Java/Kotlin) iOS (Swift) SDK Integration Firebase (Auth, Realtime DB) REST and SOAP APIs .NET ASP.NET Core SignalR C# SQL Server Azure Docker Jenkins MVC MVVM Payment Gateway POS Systems Postman Automated Test Suites Jira

Tata Consultancy Services

Intermediate Developer

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Toronto, Canada (Remote)

Oct 2021 – Jan 2023

Scotiabank Client: Scotiabank (Toronto, Canada)
  • Contributed to scalable Scotiabank web banking application server in Apache TomEE (Java EE) processing 500,000+ daily active users, implementing event-driven microservices architecture for high-availability financial services
  • Integrated and supported banking branches in OpenText data management tools, reducing document processing delays in branches by 30% through document digitalization and improved office workflow in 7 Caribbean countries
  • Optimized system processing performance by 50% through automated SQL and ETL procedures for customer data
  • Created test strategies for backend validation, API testing in Postman for verification and documenting in Confluence
Java Apache TomEE Microservices SQL Server Git Postman JMeter Confluence OpenText

Teleperformance

Developer I

+

Bogota, Colombia (Hybrid)

Oct 2018 – Oct 2021

  • Developed HR management platform in Java Spring Boot and Java SE Desktop, integrating polygraphy system, recruiting and selection data, and reducing hiring workflows by 70% through automation and process optimization
  • Built multiplatform application using React, Node.js, and Flutter for payroll department, including personnel hours and dismissals across their campaigns, increasing user engagement by 25% through improved UI/UX design
  • Implemented data processing solutions in SQL Server, Python, and Power BI for HR analytics, processing large datasets for financial reporting and reducing operational costs by 15% through data driven insights and analytics
  • Built an internal ERP system in PHP, HTML/CSS, JavaScript, and MySQL, centralizing workforce data across departments and replacing manual reporting processes that previously required multiple disconnected tools
Java Spring Boot React Flutter Python PHP HTML CSS JavaScript Node.js MySQL SQL Server GitHub MVC JUnit (Unit Testing) Power BI

Education

Master of Science

Computer Science

Arizona State University

2025 – Fall 2026 (expected)

CS Professional Certification ↗

AI and Machine Learning

Arizona State University

Jan 2025 – Dec 2025

Bachelor of Science ↗

Software Engineering

Grancolombiano Polytechnic University

Jan 2020 – Jun 2023

Associate of Science ↗

Information Systems Analysis and Development

National Training Service

Jan 2017 – Jan 2019

Beyond the Code

Curiosity has been the thread connecting every chapter of my career. From payroll systems at Teleperformance, to banking platforms at TCS serving Scotiabank, to payment processing at MiCamp Solutions, each role has deepened my understanding of how technology moves money and empowers people. Originally from Colombia, I moved to the United States in early 2023 and found home in Arizona. The desert has a way of teaching you to appreciate both simplicity and resilience, qualities I try to carry into the software I engineer every day. I love exploring the landscape out here and thinking about how technology can improve the world around us. My path hasn't been conventional, and I think that's an advantage. A diverse background means different perspectives at the table, and different perspectives build better software. I'm a U.S. Permanent Resident and require no sponsorship. Having completed my AI and Machine Learning coursework at Arizona State University, I'm now pursuing a Master's in Computer Science there, because for me, the learning never stops.

Let's Connect

Email

contact@kev-c.dev

LinkedIn

linkedin.com/in/kevc-dev

GitHub

github.com/kevc-dev