David Wagner

Overview
Versatile Full-Stack Engineer with 8+ years of experience helping organizations scale efficiently by building pragmatic, cost-effective software solutions. Specializing in end-to-end Web & Mobile App Development, System Optimization, CI/CD Pipelines, and AI-Assisted Development. Whether you need to replace legacy tech debt, automate manual workflows, or build high-performance tools from scratch, I focus on simple, sustainable, and reliable code that delivers real results.

Core Services Offered
1. Full-Stack Web & API Development
Frontend: Interactive, modern web portals and dashboards built with React, TypeScript, and Svelte.
Backend: Robust REST APIs, microservices, and backend logic powered by Java (Spring Boot) and Rust.
Database & Messaging: Relational database design (SQL, Oracle) and high-throughput data streaming (Kafka, Cassandra).
2. Mobile & Cross-Platform App Development
Native & Cross-Platform: Custom mobile applications for iOS and Android using React Native and Android/Java.
Integrations & UI: Widget design, third-party API integration, and keyboard-centric/TUI interface tooling.
3. Workflow Automation & Legacy Modernization
Process Automation: Self-service administrative and operational portals to automate manual, repetitive data entry tasks.
Legacy Refactoring: Modernizing legacy architectures into modular microservices to reduce system maintenance costs and boost reliability.
4. Performance Optimization & QA Automation
Load Testing & Speed Optimization: Performance tuning with JMeter and Blazemeter to ensure fast load times across low-end devices or slow networks.
Test Automation: Comprehensive end-to-end testing setups using Cucumber and JUnit to eliminate manual QA overhead.
5. DevOps, CI/CD & Deployment Setup
Automated Pipelines: Custom CI/CD deployment setups using Jenkins, AWS, and Docker for fast, hands-off software releases.
Architecture Advisory: System design and technical roadmap planning tailored for lean startup teams and small organizations.

Tech Stack
Languages & Frameworks: Java, Spring Boot, React, TypeScript, Rust, Svelte, React Native, SQL
Cloud & DevOps: AWS, Docker, Jenkins, Git, CI/CD
Data & Messaging: Kafka, SQL, Cassandra, Oracle, REST APIs
Testing & Tools: JUnit, Cucumber, JMeter, Blazemeter, AI-Assisted Workflows