John Valincius

Software Engineer (Full Stack & Embedded Systems)
Connecticut, United States

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Summary

Full stack engineer with a strong focus on building modern web applications using C#, ASP.NET Core, and Blazor, alongside deep experience in embedded systems, hardware design, and manufacturing.

Experienced in developing end-to-end systems—from UI/UX and backend architecture to firmware, PCB design, and CNC-based production workflows. Combines software engineering rigor with hands-on hardware execution to deliver highly integrated, real-world products.

Certifications

  • Uxcel — UX Design Foundations
  • CompTIA — Security+

Experience

CustomKeys.gg

Founder, Engineer, Designer
September 2023 – Present

  • Founded and operate a full-stack hardware/software business designing and manufacturing custom mechanical keyboards.
  • Designed custom PCBs, including schematic capture, layout, and validation.
  • Developed embedded firmware for keyboard input handling and RGB lighting control.
  • Built a complete in-house manufacturing pipeline:
    • CNC machining (aluminum cases)
    • Surface finishing (anodizing, powder coating)
    • 3D printing and prototyping
    • Assembly, soldering, and QA
  • Designed keyboard enclosures and components in Fusion 360, optimizing for manufacturability and precision.
  • Developed and maintain a custom e-commerce website:
    • Built with Astro, SolidJS, and Tailwind CSS
    • Implemented product customization and ordering workflows
  • Managed sourcing, supply chain decisions, and production planning.

BAM Technologies, LLC

Software Engineer – Team Lead
January 2024 – March 2026

  • Led a team of 4 engineers delivering a greenfield web application for senior leadership within the U.S. Air Force.
  • Architected and developed a full-stack system using Angular, ASP.NET Core, and PostgreSQL.
  • Owned technical direction, including system design, code standards, and architectural decisions.
  • Mentored junior engineers, conducted code reviews, and improved team development practices.
  • Implemented CI/CD pipelines using GitHub Actions and managed deployments to Azure and on-prem IIS environments.
  • Collaborated with stakeholders to translate requirements into scalable technical solutions.
  • Ensured adherence to security best practices and accessibility (A11y) standards.

ComplYant

Software Engineer
February 2023 – September 2023

  • Developed a scalable UI component library using PHP (Laravel), Livewire, and Tailwind CSS.
  • Built interactive component documentation and testing environment using Storybook.
  • Collaborated closely with design teams to ensure consistency and usability across the application.
  • Improved development efficiency by standardizing reusable UI components.

Pinpoint Global Communications

Software Engineer
October 2022 – February 2023

  • Maintained and enhanced legacy .NET Framework applications.
  • Delivered new features while preserving stability in a production environment.
  • Assisted in troubleshooting and resolving production issues.

BAM Technologies, LLC

Senior Software Engineer
March 2021 – October 2022

  • Maintained and expanded a web application built with .NET Framework, SQL Server, and JavaScript.
  • Migrated functionality from a legacy WinForms application to a modern MVC architecture.
  • Improved maintainability and performance through refactoring and modernization efforts.

COCC

Software Developer
February 2020 – March 2021
Southington, Connecticut, United States

  • Developed internal tools for data parsing and migration within a financial software environment.
  • Automated data import workflows, improving reliability and reducing manual effort.
  • Built a real-time internal chat application using SignalR:
    • Implemented role-based access and channel segmentation
    • Enabled file sharing and team-based communication
  • Delivered solutions tailored to operational workflows and business needs.

LogoSportswear

Web Developer
February 2020 – September 2020

  • Built internal tools using PHP and JavaScript to improve order processing workflows.
  • Developed utilities such as:
    • Product/GTIN matching system for supplier integration
    • Email template editor for non-technical staff
  • Contributed to ongoing development and maintenance of the e-commerce platform.

Web Developer
April 2019 – February 2020

  • Enhanced core e-commerce functionality and internal systems.
  • Collaborated across teams to deliver new features and improvements.

Junior Web Developer
August 2018 – April 2019
Wallingford, Connecticut, United States

  • Supported development of internal and customer-facing web applications.
  • Gained experience in full-stack development and production systems.

Education

Indian River State College

Information Technology (Coursework Completed)
January 2016 – December 2021

Note: Degree not completed; included to reflect relevant academic background.

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