Dan Serbanoiu
Verified Expert in Engineering
AI Engineer and Python Developer Developer
Santo Domingo, Distrito Nacional, Dominican Republic
Toptal member since August 12, 2026
Dan is a senior software engineer with 8+ years of experience building cloud-native platforms, enterprise systems, and AI-powered products. He specializes in Python, FastAPI, React, AWS, PostgreSQL, Docker, and applied AI, delivering scalable solutions across the full software lifecycle for startups, enterprises, and public-sector organizations.
Portfolio
Experience
- TypeScript - 8 years
- Amazon Web Services (AWS) - 4 years
- PostgreSQL - 4 years
- React - 4 years
- FastAPI - 4 years
- Machine Learning - 4 years
- Python 3 - 4 years
- Artificial Intelligence (AI) - 4 years
Work Experience
Senior Software Developer & AI Engineer
Independent Contractor
- Designed and developed an agentic AI sales platform for $20,000–$500,000 solar projects for Wiren, using Python agents via OpenClaw, LLM, and solar feasibility analysis, and automated multichannel outreach to qualify prospects (July–October 2026).
- Designed a Shopify–Airtable system for 2 stores for a Toptal client, synchronizing customers, orders, subscriptions, memberships, products, and shipments. Integrated Practice Better invoices and payments, and automated 70-day reminders (August 2026).
- Designed and developed an end-to-end retail management system for Hornneti, integrating inventory tracking, accounting, Proventa POS, Azul payment processing, and receipt printing to streamline sales and daily operations (July 2026).
- Built Python back-end services for a large-scale public administration platform for DXC, contributing to core component migration and GeoServer integration to improve scalability, maintainability, and reliability (December 2025–July 2026).
- Designed and implemented a RAG pipeline and LLM-powered semantic search for comparing professional profiles for LeaderInsight.ai, improving candidate matching within an enterprise HR platform (November 2025–February 2026).
- Developed back-end services and AI workflows for CertifAI Med to generate MDR regulatory documentation for medical-device certification (October–December 2025).
- Built a white-label, agentic AI chatbot for AP, integrated with a MongoDB-based industrial MES, enabling maintenance teams to query operational data using natural language via WhatsApp (July–October 2025).
- Developed an agentic pipeline for Tourbillon Tech to scrape, search, and analyze public procurement lots for lighting services, alongside AI-powered solar feasibility studies and Python data pipelines for Italian buildings (April–July 2025).
- Designed and developed an AI-powered sales prospecting platform for Alta using Python, FastAPI, React, and AWS, integrating LLM-based lead qualification and customer research (August 2024–May 2025).
- Built web platforms and integrated ERP services and external APIs across multiple brands for SD, enabling customers to subscribe, sign contracts, and purchase products and services (October 2023–July 2024).
Back-end Software Developer
Goldman Sachs
- Implemented new features to the margin calculator to comply with regulatory changes and management requirements.
- Delivered risk reports and analytics to clients, Risk Managers, and margin operations teams worldwide.
- Designed and maintained back-end services for data processing and reporting, ensuring accuracy and reliability.
AI/Machine Learning Engineer
&Facts
- Built a full-stack web application using TypeScript (Aurelia) and Python (Django).
- Implemented forecasting methods for non-stationary marketing data using the KRLS-T model.
- Implemented k-means clustering algorithms for product classification.
Full-stack Developer
Futura SI
- Implemented a file manager module to help clients navigate and store their documents.
- Built a smart scheduler to help clients schedule maintenance operations efficiently.
- Developed an engine to allow nontechnical users to easily query a relational database.
Software Developer
ItalianaSoftware
- Developed an API marketplace with a microservices architecture for buying and selling APIs within a team of 6.
- Developed an API gateway for regulating and limiting API usage by customers.
- Oversaw documentation writing and software deployment cycles.
Project History
Agentic AI Sales Platform for $20,000–$500,000 Solar Projects (July–October 2026)
Airtable/Shopify Developer (August 2026)
End-to-end Retail Management System For Hornneti (July 2026)
Italian Ministry Environmental Data Platform (December 2025–July 2026)
LeaderInsight.ai Enterprise HR RAG & Semantic Search Platform (November 2025–February 2026)
AI-powered Medical Device Certification Platform (October–December 2025)
AI-powered Sales Prospecting Platform (August 2024–May 2025)
Education
Master's Degree in Smart Telecom and Sensing Networks
Aston University - Birmingham, England
Bachelor's Degree in Computer Science
University of Padua - Padua, Italy
Skills
Libraries/APIs
React, REST APIs, OpenAI API, Stripe, Playwright, Graph API, SendGrid API, PyTorch, Google Maps API, Claude API, PowerPoint API, GraphQL API, API Development, Pydantic, SQLAlchemy
Tools
Claude Code, Claude, Visual Studio, Claude Agent SDK, Terraform, Codex, ChatGPT, Spreadsheets, SendGrid, Webpack, Odoo, Confluence, MongoDB Atlas, Microsoft Power BI, Google Analytics, Grafana, AWS Step Functions, Amazon Cognito, Amazon Simple Queue Service (SQS), Azure OpenAI Service, AI Prompts, GraphRAG, Zapier, GitLab, Jira, Git, GitHub, Amazon Elastic Container Service (ECS)
Languages
Python, JavaScript, TypeScript, Python 3, CSS, HTML, SQL, Java, XML, PHP, C++, C#.NET, C#, HTML5
Frameworks
Django, React Native, LangGraph, Selenium, .NET, Agentic Frameworks, Payload CMS, Vanilla JS, Aurelia, AngularJS, Alembic
Paradigms
API Architecture, Event-driven Architecture, Desktop App Development, REST, Automation, App Development, Search Engine Optimization (SEO), Clean Code, Model Context Protocol (MCP), Web Application Architecture, Application Architecture, Role-based Access Control (RBAC), Continuous Integration (CI), DevOps, Serverless Architecture, Best Practices, ETL, Maintainability, Stress Testing, Asynchronous Programming, Back-end Architecture, UI Design, UX Design, Testing, Penetration Testing
Platforms
Amazon Web Services (AWS), Shopify, Google Cloud Platform (GCP), Azure, Azure Functions, WooCommerce, Webflow, Linux, Docker, Kubernetes, Web, Twilio, Google Ads, AWS Lambda, Desktop, WordPress, Windows, Visual Studio Code (VS Code), Calendly
Storage
PostgreSQL, PostgreSQL 10, Data Pipelines, MySQL, Databases, Google Cloud, Data Integration, Amazon S3 (AWS S3), JSON, Database Architecture, Amazon DynamoDB, SQLite, SecDB, MongoDB
Industry Expertise
Web Design, Healthcare, Marketing
Other
Machine Learning, FastAPI, Artificial Intelligence (AI), Large Language Models (LLMs), Software Engineering, Architecture, Back-end, Algorithms, Agentic AI, Development, Full-stack Development, APIs, Full-stack, Search Engines, Authentication, Authorization, API Integration, SaaS, Integration, OpenAI, API Design, API Testing, Data, AI Architecture, AI Engineering, Web Applications, Technical Architecture, CTO, System Architecture, Cloud Architecture, Scalability, Software System Architecture Development, System Architecture Design, Technical Leadership, Software Architecture, AI Model Training, Open Source, Prompt Engineering, Software as a Service (SaaS), Multi-tenant SaaS, Data Analytics, Webhooks, Generative Artificial Intelligence (GenAI), Event-driven Systems, Solution Architecture, Web Scraping, WordPress Plugins, Elementor Pro, Website Performance, CAPTCHA, Proxies, AI Workflow, ChatGPT Prompts, Enterprise Systems, Multi-tenant Architecture, Startups, Code Review, Data Engineering, Airtable, Supabase, Elementor, User Interface (UI), CI/CD Pipelines, Lovable, Operating Systems, Data Analysis, Data Visualization, User Experience (UX), Fintech, AI Agents, AI Voice Agents, Front-end, Web Development, Fractional CTO, Cloudflare, Security, Plugins, AI Tools, AI-assisted Development, Agentic Coding, AI Integration, Workflow Automation, OpenAI SDK, AI Chatbots, Email, Email Deliverability, Data Modeling, Real-time Data, AI-generated Code, CRM, Third-party Integration, Marketing Automation, SQLModel, Retrieval-augmented Generation (RAG), Optimization, Performance, Third-party APIs, Auditing, Data Accuracy & Reporting, Back-end Development, Application Security, IT Security, Payment APIs, Web Security, Observability, Privacy, Dashboards, Data Quality, QA Process, WebSockets, Banking as a Service (BaaS), Real-time Computing, Row-level Security (RLS), Security Audits, Supabase Auth, AI Agent Orchestration, LangChain, Data Privacy, Data Extraction, LLM Integration, Reporting, Workflows, Finance, AI Model Integration, Data Integrity, Front-end Development, RAG Systems, Identity & Access Management (IAM), Pub/Sub, Google Play Store, Message Queues, Minimum Viable Product (MVP), Healthcare Software, Anthropic, Coding, Microsoft Azure, Payments, Agentic Workflow Design, Amazon API Gateway, User Authentication, Data Architecture, Data Security, LLM Agents, Pipelines, Reliability, Vite, AI Development, Cloud Storage, AI Security, Compliance, Single Sign-on (SSO), Early-stage Startups, Concurrency, Database Optimization, Conditional Logic, OpenAI APIs, WiFi, Technical Project Management, Shopify Design, Encryption, SEO Tools, eCommerce, A/B Testing, Analytics, AWS Auto Scaling, Learning Management Systems (LMS), POS
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