Hey, I'm Kevin!

A Software Engineer with 6+ years of experience building full-stack solutions across financial services, payment processing, and banking systems. Currently based in Scottsdale, Arizona.

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 30,000+ 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.

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 for payment terminals (Clover, Pax, Dejavoo) serving 30,000+ 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 handling $1M+ in monthly transaction volume across multiple payment terminals (Clover, Pax) and gateways
  • Drive technical decisions for 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
  • Support legacy code from international teams, extracting core features and creating new cloud solutions in AWS, improving scalability and reducing monthly fees by 40%, resulting in improved customer satisfaction
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

  • Built mobile applications using Java, Kotlin, and Swift, integrating SDKs, Firebase, REST and SOAP services, growing 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

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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

Jan 2026 – May 2027 (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. 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