Full-stack engineer

Acworth, GA

Wallace Panter

Staff software engineer with over a decade building and modernizing API systems, payment platforms, and data-backed products across healthcare, billing, and consumer apps — including a PCI-DSS Level 1 platform processing $2B annually.

Contact Wallace See Work History

Core Skills

AI & LLM

ClaudeAI assistant from Anthropic used for coding, writing, analysis, and product exploration.
QwenFamily of large language models from Alibaba used for coding and general tasks.
OpenAI APIsAPIs for adding language, reasoning, and generative AI capabilities to products.
OpenRouterUnified API gateway for routing requests across many LLM providers.
Google AI StudioGoogle's web tool for prototyping and building with Gemini models and APIs.
GitHub CopilotAI pair-programming assistant that suggests code inline in the editor.
CodexOpenAI coding agent used for codebase navigation, implementation, testing, and automation.

Languages

C#Typed programming language commonly used with .NET backend and enterprise systems.
TypeScriptJavaScript with static types for safer application and API development.
JavaObject-oriented language commonly used for backend services and enterprise systems.
PythonGeneral-purpose programming language used for scripting, automation, data, and backend development.

Frontend

ReactUI library for building component-based web interfaces.
React NativeFramework for building native mobile apps with React.
ExpoReact Native platform for building, testing, and shipping mobile apps.
Expo RouterFile-based routing system for Expo and React Native applications.
Next.jsReact framework for server-rendered and statically generated web applications.
React RouterRouting and server-rendering framework for React applications.
Tailwind CSSUtility-first CSS framework for building responsive interfaces quickly.
ViteFast frontend build tool and development server.
ZustandSmall React state-management library.

Backend & Data

.NETMicrosoft's application platform for building APIs, services, and enterprise applications.
Spring BootJava framework for building production-ready backend services.
Node.jsJavaScript runtime commonly used for backend services and build tooling.
ElysiaTypeScript web framework for Bun-focused APIs.
PrismaTypeScript ORM for modeling, querying, and migrating relational databases.
PostgreSQLRelational database with strong SQL, indexing, and extension support.
PostGISPostgreSQL extension for geospatial queries and location-aware application data.
MySQLRelational database used for transactional application data.
SQLiteEmbedded relational database commonly used for local storage and lightweight apps.
RedisIn-memory data store used for caching, queues, and fast lookup patterns.
REST APIsHTTP APIs organized around resources, methods, and structured request/response payloads.
WebSocketsPersistent bidirectional connection protocol for real-time app features.

Cloud

AWSAmazon Web Services, a cloud platform for hosting, storage, networking, and managed infrastructure.
GCPGoogle Cloud Platform, Google's cloud services for hosting, data, and infrastructure.
Google Cloud StorageGoogle Cloud object storage for files, media, backups, and static assets.
Cloudflare WorkersServerless runtime for deploying web apps and APIs at Cloudflare's edge.

Platform & Tools

DockerContainer platform for packaging applications with their runtime dependencies.
Docker ComposeDocker tool for running multi-container local and integration environments.
TerraformInfrastructure-as-code tool for provisioning cloud resources repeatably.
GitHub ActionsGitHub-native CI/CD automation for tests, builds, and deployments.
CI/CDAutomated build, test, and deployment pipelines for shipping software safely.
LinuxUnix-like operating system commonly used for servers, containers, and developer tooling.
LinearIssue tracking and planning tool for product and engineering teams.
JiraAtlassian issue and project tracking tool for product and engineering teams.
ConfluenceAtlassian documentation workspace for team notes, specs, and process docs.
IntelliJJetBrains IDE for Java, Kotlin, TypeScript, and backend development.
Google AntigravityAI-assisted development environment from Google.

Product Systems

PCI ComplianceSecurity requirements for systems that process or handle payment card data.
Vendor IntegrationsConnecting product workflows to third-party systems, APIs, and platforms.
OAuthAuthorization protocol used for delegated access and sign-in flows.
JWTJSON Web Token, a compact format for signed authentication and authorization claims.
SSOSingle sign-on, allowing users to authenticate once across multiple systems.
StripePayment platform for cards, billing, identity, and financial workflows.
SentryError tracking and performance monitoring platform.
PinoFast structured logging library for Node.js services.
ResendEmail delivery API for transactional and product email.

Experience

Recent Work

Career Break

Full-Time Parenting

April 2025 - Present

Balanced full-time parenting with hands-on development of SquaddUp, a full-stack companion-finding application engineered and deployed to production across iOS, Android, and web.

Asurion

Nashville, TN (Remote)

Software Engineer 3

December 2021 - April 2025

Billing platform engineering across point-of-sale terminals, web APIs, vendor integrations, and PCI compliance.

Owned billing-platform transaction paths across point-of-sale (POS) terminals and web APIs processing $2 billion in annual payment volume, achieving PCI-DSS Level 1 compliance.
Built Adyen and Ingenico/Worldline payment integrations supporting one-time and subscription billing across 1,000+ retail stores in LATAM, EU, and APAC.
Designed reusable payment-integration abstractions that simplified integration for internal teams and external clients.
Engineered the stack with TypeScript, React, Node.js, and MySQL, deployed via Docker on AWS.

TypeScriptMySQLAWSReactDockerIntellijJiraConfluenceNodeJSLinuxAdyenIngenico/Worldline

7Factor Software

Atlanta, GA (Remote)

Client: Aveanna

Staff Software Engineer

February 2020 - September 2021

Consulting role focused on healthcare system modernization, vendor integrations, and cloud migration.

Led healthcare-system modernization and cloud migration as lead consultant, remediating and extending legacy C# and PHP applications serving 26,000 nurses and caregivers.
Containerized delivery with Docker and built continuous integration/continuous delivery (CI/CD) pipelines to AWS (Concourse, Terraform), improving release quality and deployment speed.
Delivered 2 internal Electronic Visit Verification (EVV) integrations meeting state and federal nursing-visit compliance mandates.
Re-architected a local-store API model into centralized AWS cloud infrastructure, enabling scalable access across sites.

C#.NETTypeScriptNodeJSDockerLinuxMySQLJiraConfluenceIntellijAWSReactReact Native

myMatrixx

Tampa, FL (Remote)

Software Engineer 2

March 2017 - February 2020

Full-stack modernization of a legacy healthcare portal with React and Spring-based REST services.

Drove full-stack modernization of a legacy healthcare portal serving 1,000+ users, replacing outdated workflows with a React frontend and Spring 5 RESTful services.
Implemented IdP-initiated single sign-on (SSO) using OAuth tokens and JWTs for secure external authentication.
Upgraded backend microservices from Spring Boot 1.5 to 2.1 and established application logging and monitoring via New Relic.
Championed Test-Driven Development (TDD) using Enzyme within an Agile sprint environment.

JavaSpring BootDockerTypeScriptMySQLJiraConfluenceIntellijNodeJSLinux

JP Morgan Chase & Co

Tampa, FL & New York, NY

Application Developer

June 2013 - December 2015

Developed COBOL mainframe and client-server applications for the Global Foreign Exchange group while driving internal banking-security initiatives.

COBOLJavaPythonBash

Projects

Selected Builds

SquaddUp

Companion-finding app for concerts, hikes, museums, and other activities, with mobile, API, web, and admin surfaces.

Stripe Identity integration for user verification.

View on Google Play View on App Store

Expo React NativeElysia + BunPostgreSQL + PostGISPrismaStripeTerraform

ChromaLens

Cosplay lens tracker — a React Native mobile utility to track and manage specialty contact lenses.

React NativeExpo

Education

Academic Foundation

Georgia Institute of Technology

Bachelor of Science in Computer Science (Systems & Architecture / Media Specializations)

3.46 GPA - Higher Honors

August 2011 - December 2014

Contact

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