Aidan is available for hire
Hire AidanAidan Prehatny
Verified Expert in Engineering
Full-stack Engineer and Developer
San Diego, CA, United States
Toptal member since August 27, 2025
Bio
Aidan is a Senior Full-Stack and AI Engineer with 10+ years of experience delivering scalable, production-grade applications. At Bliss Payments, he helped launch a fintech MVP spanning a Next.js web app, Chrome extension, and App Store iOS release. His work includes AI-powered RAG systems, web products serving thousands of users at BannerWave, and real-time visualization of tens of thousands of satellites at Slingshot Aerospace. He holds an M.S. in Computer Science from Georgia Tech.
Portfolio
Bliss Payments, Inc
Next.js, React, TypeScript, Java, PostgreSQL, Plaid, Docker, Kubernetes, iOS...
BannerWave
Python, TypeScript, Amazon Web Services (AWS), PostgreSQL, React, OpenAI API...
Slingshot Aerospace
TypeScript, React, Three.js, WebGL, Python, FastAPI, PostgreSQL...
Experience
- Artificial Intelligence (AI) - 8 years
- React - 8 years
- Python - 8 years
- Node.js - 8 years
- Full-stack - 8 years
- Software Engineering - 8 years
- TypeScript - 8 years
- Next.js - 6 years
Work Experience
Full-stack Engineer
2026 - 2026
Bliss Payments, Inc
- Delivered a consumer fintech “Save Now, Buy Later” MVP for closed beta, building the Next.js web app and Chrome Manifest V3 extension to streamline product discovery, wishlist management, and savings workflows.
- Engineered scalable Java/Dropwizard backend services with PostgreSQL, integrating Plaid, TabaPay, and MailerSend for financial data, payment workflows, and notifications. Deployed containerized services on GCP.
- Developed AI-powered retail intelligence using LLM-assisted product extraction, JSON, Open Graph, and DOM parsing to enable personalized shopping recommendations, product insights, and savings-goal optimization.
- Designed, developed, and launched a companion iOS application on the Apple App Store, extending the fintech platform's shopping and savings capabilities to mobile users.
Technologies: Next.js, React, TypeScript, Java, PostgreSQL, Plaid, Docker, Kubernetes, iOS, Dropwizard, Google Cloud Platform (GCP), Chrome Extensions, AI Agents, Artificial Intelligence (AI), Stripe, Full-stack Development, Software Engineering, Back-end, Model Context Protocol (MCP), NestJS
Senior Full-stack Developer
2024 - 2025
BannerWave
- Engineered high-performance, responsive web applications and interactive ad experiences using React, Next.js, and TypeScript, optimizing UI components, rendering performance, and user interactions for platforms serving thousands of users.
- Architected and optimized scalable REST and GraphQL APIs with efficient pagination, caching, background job processing, and observability. Integrated Qualtrics data pipelines to support reliable services and data-driven analytics.
- Engineered an AI-powered RAG system using OpenAI Responses API, Vercel AI SDK, and Pinecone, integrating vector embeddings, semantic search, and context-aware retrieval to deliver accurate, source-cited LLM responses.
- Automated CI/CD with GitHub Actions, Docker, and Terraform; integrated third-party systems via OAuth 2 and signed webhooks with rate limiting and idempotency.
Technologies: Python, TypeScript, Amazon Web Services (AWS), PostgreSQL, React, OpenAI API, Vercel, Next.js, REST APIs, GraphQL, Node.js, Pinecone, AI Agents, AI Tools, OpenAI, Software Engineering, Back-end, Model Context Protocol (MCP)
Senior Software Engineer
2022 - 2024
Slingshot Aerospace
- Engineered a real-time 3D satellite visualization platform using React, Three.js, and WebGL, rendering tens of thousands of satellites with live orbital updates to support simulation, analysis, and operator training.
- Developed scalable Python, FastAPI, and PostgreSQL services to process satellite telemetry predictions and ML inference outputs, transforming complex orbital data into actionable insights through React and Nivo visualizations.
- Engineered AI/ML-powered backend APIs to process satellite telemetry and predictive model outputs, transforming complex ML inferences into real-time, actionable insights through interactive React and Nivo Charts visualizations.
- Implemented WebSocket-driven state management and GraphQL subscriptions to synchronize satellite positions and simulation data across connected users, delivering responsive, consistent multiplayer experiences.
- Played a pivotal role in architecting and delivering the 3D satellite tracking platform, collaborating with stakeholders to translate complex orbital mechanics into interactive analytics.
Technologies: TypeScript, React, Three.js, WebGL, Python, FastAPI, PostgreSQL, Data Visualization, AI Agents, Artificial Intelligence (AI), AI Integration, Supabase, Automation, Software Engineering, Back-end, Agentic AI, NestJS
Senior Software Engineer
2021 - 2022
Decision Sciences
- Developed React-based interfaces integrated with .NET services for international customs and border agencies, delivering secure, responsive applications for complex operational workflows and data processing.
- Automated Azure infrastructure and containerized microservice deployments using Terraform and Docker, establishing repeatable deployment workflows while improving system scalability, reliability, and operational efficiency.
- Led the transition from air-gapped infrastructure to cloud-based architecture, coordinating system modernization while maintaining strict security standards, optimizing application performance, and improving deployment flexibility.
Technologies: C#, Azure, React, TypeScript, Docker, Terraform, Cloud, .NET, AI Integration, Kubernetes, AI Agents, Microservices, DevOps, Gemini, Angular, Vue, Software Engineering, Back-end, Agentic AI, Ruby on Rails (RoR)
Senior Software Engineer
2018 - 2021
Fuse Integration
- Engineered real-time antenna control software to improve network availability and throughput for defense and airborne communication systems, supporting reliable connectivity in demanding operational environments.
- Developed software-defined routing solutions for airborne networks with intermittent satellite connectivity, enabling adaptive network communication and resilient data transmission under constrained conditions.
- Engineered AI-ready software-defined routing solutions for airborne networks with limited satellite connectivity, establishing a foundation for ML-driven route optimization, adaptive decision-making, and resilient communications.
- Collaborated with cross-functional teams on a range of in-house software products, integrating established and emerging defense technologies.
Technologies: JavaScript, C++, Socket Programming, TypeScript, Python, Unix, OpenLayers, Docker, Full-stack, PostgreSQL, UI Animation, Streaming, REST APIs, Axios, JSON Web Tokens (JWT), React Router, SQLAlchemy, WebSockets, Redux, APIs, Google Maps API, MySQL, FastAPI, API Integration, .NET, CSS, CSS-in-JS, GraphQL, REST, SQL, Agentic AI, Architecture, Webhooks
Software Engineer
2017 - 2018
Paradeigm
- Developed responsive web and cross-platform mobile interfaces using React Native, implementing reusable UI components, efficient state management, and seamless user interactions to deliver scalable, maintainable frontend applications.
- Engineered scalable, AI-ready backend services with secure authentication, REST APIs, and NoSQL data modeling, enabling seamless integration of LLM-powered features, intelligent automation, and AI-driven workflows.
- Innovated strategies for managing substantial application states with immutable update logic, contributing to efficient data system design.
- Collaborated on many customer-facing applications, swiftly adapting to client demands and consistently meeting deadlines, showcasing proficiency in React UI.
Technologies: JavaScript, React, MongoDB, Mapbox, Node.js, React Native, UI Animation, REST APIs, Axios, JSON Web Tokens (JWT), React Router, WebSockets, Redux, APIs, Google Maps API, Firebase, MySQL, API Integration, Strapi, Headless CMS, CSS, CSS-in-JS, Google Cloud Platform (GCP), CI/CD Pipelines, Material UI, React Hook Form, React Testing Library, Server-side Rendering (SSR), Retool, GitHub, React Query, HTML5, HTML, Artificial Intelligence (AI), Datadog, Role-based Access Control (RBAC), Agentic AI, Architecture, Webhooks
Project History
Space Simulation Software
Developed core simulation software underlying Slingshot Laboratory and Training and Education tools. It features cloud-native, collaborative astrodynamics environments, AI-driven threat agents, high-fidelity modeling, and physics-accurate space training experiences.
A video can be found at drive.google.com/file/d/18qQZhdYe9KH8oqyoliHobTPaXLZR5XFW/view?usp=sharing.
A video can be found at drive.google.com/file/d/18qQZhdYe9KH8oqyoliHobTPaXLZR5XFW/view?usp=sharing.
Paradeigm
Paradeigm Films is a full-service, direct-to-client video production agency founded in San Diego, California, in 2015. I 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.
Web Apps and Interactive Ad Experiences
• Designed and shipped full-stack web apps and interactive ad experiences with React/Next.js, TypeScript, Node.js, PostgreSQL, and AWS, 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 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.
• 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
2020 - 2023
Master's Degree in Computer Science
Georgia Institute of Technology - Atlanta, Georgia, USA
2016 - 2018
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, React Hook Form, React Testing Library, React Query, API Development, Three.js, OpenLayers
Tools
Terraform, Retool, GitHub, Plaid
Languages
JavaScript, Python, TypeScript, C#, Java, C++, CSS, GraphQL, SQL, HTML5, HTML
Frameworks
React Native, Next.js, JSON Web Tokens (JWT), Redux, .NET, Tailwind CSS, Angular, Material UI, .NET 4, Spring, Ruby on Rails (RoR), NestJS, Dropwizard
Paradigms
REST, Role-based Access Control (RBAC), Automation, Model Context Protocol (MCP), DevOps, Socket Programming, Microservices
Platforms
Docker, Amazon Web Services (AWS), Unix, Vercel, Mapbox, MacOS, Windows, Google Cloud Platform (GCP), Kubernetes, iOS, Azure, Firebase
Storage
PostgreSQL, MongoDB, Datadog, MySQL
Other
Artificial Intelligence (AI), Web Development, Software Engineering, Full-stack, OpenAI, Gemini, Cloud, Axios, WebSockets, APIs, FastAPI, API Integration, Supabase, AI Integration, AI Tools, Full-stack Development, CI/CD Pipelines, Chrome Extensions, Data Visualization, AI Agents, Software, Single Sign-on (SSO), Server-side Rendering (SSR), React Hooks, Legacy Code, Back-end, Agentic AI, Architecture, Webhooks, Streaming, UI Animation, Strapi, Headless CMS, CSS-in-JS, Account-based Marketing (ABM), Pinecone
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