Aidan Prehatny
Verified Expert in Engineering
Full-stack Engineer and Developer
San Diego, CA, United States
Toptal member since August 27, 2025
Aidan is a senior full-stack engineer with 8+ years of experience who ships reliable, user-focused products. He builds React/Next.js UIs and Node.js/Python services, designs REST and GraphQL APIs, and runs on AWS or Vercel with solid CI/CD, observability, and security. Recent work spans real-time simulation at Slingshot Aerospace and consumer web apps at BannerWave. He has practical experience adding AI features with OpenAI and the Vercel AI SDK when they serve clear product goals.
Portfolio
Experience
- TypeScript - 8 years
- React - 8 years
- Python - 8 years
- Node.js - 8 years
- Full-stack - 8 years
- Software Engineering - 8 years
- Next.js - 6 years
- Artificial Intelligence (AI) - 5 years
Preferred Environment
MacOS, Unix, Windows, Fiddler, React, Node.js, TypeScript, Next.js, C#, .NET
The most amazing...
...thing I've built is Slingshot Laboratory, a real-time WebGL space simulator that trains operators with GPU-accelerated orbital visuals.
Work Experience
Full-stack Engineer
Bliss Payments, Inc
- Worked across React, TypeScript, Next.js, Java, Dropwizard, JDBI, PostgreSQL, Docker, Kubernetes on GCP, GitHub Actions, Plaid, Tabapay, Mailersend, and Chrome Extension APIs to deliver the product successfully.
- Completed a consumer fintech “Save Now, Buy Later” MVP by merging existing codebases and finalizing both the Chrome Manifest V3 browser extension and Next.js web app for closed beta launch.
- Created an iOS mobile application and released it to the App Store.
- Built key front-end features, such as wishlist and savings goal management, transaction history, browser notifications, compliance-driven balance cap enforcement, and product data extraction from retail pages using JSON, Open Graph, and DOM parsing.
Senior Full-stack Developer
BannerWave
- Designed and shipped full-stack web apps and interactive ad experiences with React, Next.js, TypeScript, Node.js, PostgreSQL, AWS, and Amazon Connect, supporting thousands of users.
- Implemented a Retrieval-augmented Generation (RAG) generative-AI feature using OpenAI Responses API and Vercel AI SDK; built ingestion and retrieval with Pinecone to deliver transparent, cited insights.
- Designed and optimized REST and GraphQL APIs with efficient pagination, caching, background queues, and end-to-end observability. Integrated Qualtrics data to improve user experience insights and enhance data-driven decision-making.
- Automated CI/CD with GitHub Actions, Docker, and Terraform; integrated third-party systems via OAuth 2 and signed webhooks with rate limiting and idempotency.
Senior Software Engineer
Slingshot Aerospace
- Served as a core developer of a real-time 3D space simulation. Built a highly performant WebGL-based visualization platform in React and Three.js, rendering tens of thousands of satellites with real-time positional updates.
- Designed a WebSocket-driven state management system with GraphQL subscriptions, ensuring seamless multiplayer UI synchronization.
- Developed and optimized APIs to serve satellite telemetry predictions, integrating FastAPI with PostgreSQL. Structured ML inference data for front-end visualizations and integrated Qualtrics data for enhanced user insights.
- Engineered back-end APIs that processed satellite pass predictions, transforming raw ML inferences into actionable telemetry insights visualized in React and Nivo Charts.
- Played a pivotal role in architecting and delivering the 3D satellite tracking platform, collaborating with stakeholders to translate complex orbital mechanics into interactive analytics.
Senior Software Engineer
Decision Sciences
- Designed and developed service-oriented back-end systems with .NET and React UIs, supporting international customs and border agencies through the company's products.
- Automated infrastructure and deployment using Terraform and Docker for infrastructure as code (IaC), streamlining microservice deployments. Deployed scalable, resilient systems on Azure, improving cost efficiency and performance.
- Headed the transition from air-gapped environments to cloud-based solutions, optimizing system performance while maintaining high security standards.
Senior Software Engineer
Fuse Integration
- Developed innovative software-defined routing solutions for network environments lacking satellite connectivity, enabling reliable airborne communications.
- Engineered real-time antenna control systems, boosting network availability and throughput for defense and airborne applications.
- Collaborated with cross-functional teams on a range of in-house software products, integrating established and emerging defense technologies.
- Solved complex integration challenges by designing modular, reusable software architectures adapted to strict third-party technical specifications and APIs.
Software Engineer
Paradeigm
- Engaged in cross-disciplinary software development for web and cross-platform mobile applications utilizing React Native.
- Innovated strategies for managing substantial application states with immutable update logic, contributing to efficient data system design.
- Contributed to server-side web application logic, handling user validation/authentication, HTTP path-based data routing, and NoSQL object data modeling.
- Collaborated on many customer-facing applications, swiftly adapting to client demands and consistently meeting deadlines, showcasing proficiency in React UI.
Experience
Space Simulation Software
A video can be found at drive.google.com/file/d/18qQZhdYe9KH8oqyoliHobTPaXLZR5XFW/view?usp=sharing.
Paradeigm
Web Apps and Interactive Ad Experiences
• Implemented a Retrieval-augmented Generation (RAG) generative-AI feature using OpenAI Responses API and Vercel AI SDK; built ingestion and retrieval with Pinecone to deliver transparent, cited insights.
• Designed and optimized REST and GraphQL APIs with reliable pagination, caching, background queues, and end-to-end observability.
• Automated CI/CD with GitHub Actions, Docker, and Terraform; integrated third-party systems via OAut 2 and signed webhooks with rate limiting and idempotency.
Education
Master's Degree in Computer Science
Georgia Institute of Technology - Atlanta, Georgia, USA
Bachelor's Degree in Multimedia Design
San Diego State University - San Diego, CA, USA
Skills
Libraries/APIs
React, OpenAI API, WebGL, Node.js, REST APIs, React Router, SQLAlchemy, Google Maps API, Stripe, Vue, Stripe API, PayPal API, Playwright, RxJS, React Hook Form, React Testing Library, Chart.js, Claude API, React Navigation, Entity Framework, Mapbox GL, Pandas, API Development, FFmpeg, Framer Motion, Authorize.net, Balanced Payments API, Twilio API, React Query, Auth, Google Calendar API, Stripe Connect, WebRTC, OpenCV, HubSpot API, Sidekiq, Google Places API, Google Maps, Three.js, OpenLayers, D3.js, Jira REST API, Puppeteer, Shopify API, Square API, WooCommerce API, SendGrid API, ActiveCampaign API
Tools
Terraform, Claude, Windsurf, Shadcn, BigQuery, Nx, AWS CloudFormation, Auth0, Webpack, RabbitMQ, Amazon Simple Queue Service (SQS), Vitest, Canvas, Prisma, Retool, Jira, Claude Code, n8n, Amazon CloudWatch, Git, Figma, Azure App Service, GitHub, JotForm, Expo, Qualtrics, Codex, Amazon Connect, Stencil.js, Azure Active Directory B2C (ADB2C), Google Analytics, Amazon EKS, Zapier, Zoom, Apple Push Notifications, WebView, Azure Kubernetes Service (AKS), Turbo, Microsoft Dynamics, Shadcn UI, Jenkins, ChatGPT, Acumatica, Observability Tools, Pytest, Gecko, Amazon Textract, Apache Tomcat, Charles Proxy, Fiddler, TLS Fingerprinting, GIS, Amazon CloudFront, Amazon Elastic Container Service (ECS), MailerSend, Plaid, AI Prompts, CircleCI
Languages
JavaScript, Python, TypeScript, C#, Kotlin, Java, C++, CSS, GraphQL, SQL, PHP, CSS3, HTML5, Go, HTML, Modern JavaScript, Rust, Ruby, Elixir, Swift, Scala, Snowflake, Lynx
Frameworks
React Native, Next.js, JSON Web Tokens (JWT), Redux, .NET, Tailwind CSS, Angular, Spring, Express.js, Serverless Framework, Spring Boot, NestJS, Payload CMS, Material UI, .NET Core, Fastify, iOS SDK, .NET MAUI, .NET 4, .NET 8, ASP.NET, ASP.NET Core, Jest, Selenium, Django, Hibernate, Cypress, Electron, Recoil, Ruby on Rails (RoR), ASP.NET Web API, Nuxt.js, LangGraph, Bootstrap, OAuth 2, Flutter, Agentic Frameworks, gRPC, SwiftUI, ReplayKit, Entity Framework Core, Blazor, Windows Presentation Foundation (WPF), Stimulus, tRPC, Streamlit, Laravel, Dropwizard, Flask, Phoenix, Unity
Paradigms
Microservices, REST, Role-based Access Control (RBAC), Automation, E2E Testing, Test-driven Development (TDD), Web Performance Optimization (WPO), Model Context Protocol (MCP), Microservices Architecture, CSRF Protection, Responsive Web Design (RWD), Database Design, Best Practices, Load Testing, Testing, ETL, REST API Architecture, Refactoring, Web Application Architecture, Search Engine Optimization (SEO), Event-driven Architecture, Agile, Code Refactoring, Mobile Development, Real-time Systems, App Development, UI Design, Object-oriented Programming (OOP), Back-end Architecture, UX Design, Object-oriented Design (OOD), Asynchronous Programming, DevOps, HIPAA Compliance, Azure DevOps, Unit Testing, Continuous Integration (CI), Socket Programming, Software-defined Networking (SDN)
Platforms
Docker, Amazon Web Services (AWS), Unix, Vercel, Mapbox, MacOS, Windows, Google Cloud Platform (GCP), Kubernetes, Umbraco, Linux, Google Ads, iOS, Airbyte, Azure Functions, AWS Lambda, Apache Kafka, Medusa, DigitalOcean, PostHog, Android, Replit, Calendly, Shippo, Oracle, Salesforce, HubSpot, Zoom Contact Center, Zoho CRM, Mobile, LiveKit, Apache Arrow, Heroku, WordPress, Databricks, Sitecore Experience Manager Cloud (XM Cloud), Clerk, LangSmith, Azure, Firebase, Burp Suite, Jupyter Notebook
Storage
PostgreSQL, MongoDB, Relational Databases, Redis, Microsoft SQL Server, Amazon DynamoDB, Database Architecture, Data Integration, Data Pipelines, Neo4j, JSON, NoSQL, Databases, IndexedDB, Database Structure, Graph Databases, Database Management, Database Performance, Elasticsearch, Datadog, MySQL, Azure SQL Databases, PostGIS, Azure SQL, Google Cloud, Salesforce Commerce Cloud, Object Storage
Industry Expertise
Healthcare, Cybersecurity, Accounting, Automotive
Other
Artificial Intelligence (AI), Web Development, Software Engineering, Full-stack, OpenAI, Gemini, Cursor AI, Cloud, Axios, WebSockets, APIs, FastAPI, API Integration, Supabase, AI Integration, AI Tools, Full-stack Development, CI/CD Pipelines, Chrome Extensions, PayPal, Dashboards, Data Visualization, Zustand, Monorepos, SDKs, Application State Management, WCAG 2, Web Content Accessibility Guidelines (WCAG), Large-scale Projects, Web Security, Springbot, Optical Character Recognition (OCR), Non-relational Databases, Prismic, Front-end, Okta, AI Agents, Hands-on Implementation, Revenue Cycle Management, Technical Leadership, WebAssembly (Wasm), Radix UI, Single Sign-on (SSO), Server-side Rendering (SSR), RESTFul APIs, Sitecore, Storybook, Geospatial Data, Payment APIs, Amazon RDS, Caching, Cloudflare, Vite, Apollo, Compliance, Performance Optimization, Problem Solving, SaaS, Scalable Architecture, Architecture, Cookies, Deployment, Server Configuration, SSL Certificates, Large Language Models (LLMs), User Interface (UI), Pixel Perfect, User Experience (UX), Web Scraping, Dagster, Computer Vision, Data Scraping, Scraping, Scripting, .NET Framework, Solution Architecture, Software Architecture, Payment Processing, Video Streaming, Identity Verification, Agentic AI, Consumer-facing Products, Prompt Engineering, Tus.io, Video Processing, Tailwind UI, Figma to React, Payments, Base 44, React Hooks, Microsoft Azure, Static Site Generators, Page Speed Optimization, Large Language Model Operations (LLMOps), Railway, Generative Artificial Intelligence (GenAI), AI Chatbots, Classification, Conversational Agent, System Architecture, Workflow Automation, Anthropic, eCommerce, LangChain, Web Applications, User Roles, GPS, AI-assisted Development, Agentic Engineering, Finance, Avatars, Edtech Design, MVP Design, Progressive Web Applications (PWAs), Infrastructure as Code (IaC), Mobile App Development, Mobile Apps, SMS, Applicant Tracking Software (ATS), App Support, Back-end, Bug Triage, Intercom, Customer Identity and Access Management (CIAM), API Gateways, Authentication, Data Engineering, Azure Function App, Multi-agent Systems, SQL Server, Performance, AI-generated Code, Cloud Architecture, MERN Stack, Site Reliability Engineering (SRE), System Design, Endpoint Detection and Response (EDR), Code Review, Mobile Back-end, RedPanda, Integration, ReAct Agents, Third-party APIs, Third-party Integration, Troubleshooting, Workflow, Workflows, Analytics, Metabase, Fintech, Symphony, LLM Integration, ChatGPT API, HL7, Healthtech, Cloud Infrastructure, Code Auditing, Live Chat, Data Modeling, Scalability, Minimum Viable Product (MVP), Booking Systems, OAuth, Distributed Architecture, Orchestration, ELT, Client Communication, Customer Support, DNS, Cross-functional Communication, Geolocation, Shipping, SOAP, SOLID Principles, Back-end Development, Bug Fixes, Integrations, Jitterbit, Personally Identifiable Information (PII), Cloud Storage, IT Support, VoIP Administration, Financial Services, HubSpot CRM, Charts, BI Reports, Medallia, Zoho, Maps, Event-driven Systems, HIPAA, HIPAA Electronic Data Interchange (EDI), SOC 2, Conda, Customer Data, UI Development, Terraform Cloud, Internet of Things (IoT), Telematics, AI-based Content SEO, Technical SEO, OData, Social Networks, Enterprise Integration, Middleware, ERP Systems, AI Agent Orchestration, LLM Agents, Debugging, Pinecone, RAG Systems, Workflow Automation & System Integration, Turborepo, GitHub Actions, Webhooks, Payroll & Benefits, Intuit QuickBooks, Front-end Development, CTO, Firebase Cloud Functions, Technical Architecture, Training, Education Technology (Edtech), Platforms, Concurrency, State Machines, Enterprise Resource Planning (ERP), Multi-tenant SaaS, Embedded Systems, FLIR, LabJack, Neuroscience, Psychology, Psychopy, Sensors & Actuators, Product Development, Logistics, Order Management, Cross-platform App Development, Agentic AI Systems, Agentic RAG Systems, Agentic Workflow Design, Financial Data, Office Add-ins, Semantic Kernel (SK), Attendance Systems, Financial APIs, Mortgages, Multi-tenant Architecture, CMS, Billing, AI Automation, Convex, Real-time Tracking, AI Voice Agents, Machine Learning Operations (MLOps), Dashboard Development, Lean, Product Design, Taxation, Data Aggregation, GeoJSON, Real Estate, Web App Development, Roadmaps, RAG Architecture, Medical Software, Software Development, Product Management, Containerization, Leadership, Enterprise Architecture, Amazon Bedrock AgentCore, Monitoring, AI Governance, AI Testing, OOP Designs, Software Documentation, Package Design, Jetpack Compose, Observability, Performance Improvement, System Integration, Amazon API Gateway, Amazon EventBridge, Agentic Coding, Applied AI, Context Engineering, Database Optimization, Sports, Time Series Analysis, Search, AI Architecture, Browsers, HDR Photography, Open Source, Web Standards, WebKit, Interactive Intelligence (ININ), Multimedia Design, Streaming, UI Animation, Strapi, Headless CMS, CSS-in-JS, Accessibility, Active Directory (AD), Tesseract, Advisory, Distributed Systems, Large-scale Distributed Systems, Deno, Retrieval-augmented Generation (RAG), Data Analytics, Financials, Security, Financial Forecasting, Point of Sale, QuickBooks Online, Data Warehousing, Amazon Route 53, Azure Blob Storage, RESTful Microservices, Account-based Marketing (ABM), Azure SSO, Dash, DocuSign, Integration Testing, Legacy Code, Foundry, Chatbots, Speech-to-Text (STT), Trading, ActiveCampaign, Content Management Systems (CMS), Software, Paychex, Samsara
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