Nicolas Iragorri Dominguez
Verified Expert in Engineering
Back-end Developer
Madrid, Spain
Toptal member since August 30, 2022
Nicolas is a full-stack engineer with 10+ years of experience building scalable back ends, data pipelines, and AI-powered features at Reddit, Outreach, and Clover Health. From monolith-to-microservices migrations to AI translation pipelines processing millions of records daily, he pairs deep technical skill with a ship-fast mindset. Proficient in Python, Go, TypeScript, and React, with production experience integrating LLMs and RAG solutions.
Portfolio
Experience
- Python - 10 years
- React - 7 years
- Artificial Intelligence (AI) - 4 years
- RAG Pipelines - 4 years
- Finance - 3 years
- AI Automation - 3 years
- Large Language Models (LLMs) - 3 years
- Go - 1 year
Preferred Environment
Python, Go, React, Node.js, Large Language Models (LLMs), Artificial Intelligence (AI), Amazon Web Services (AWS), Kubernetes, RAG Pipelines, Docker
The most amazing...
...thing was building AI pipelines that translated and indexed millions of posts daily across multiple languages, expanding organic reach by over 30%, at Reddit.
Work Experience
Senior Full-stack Developer
Clover Health - Main
- Designed and implemented a Django web application to search, view, and download archived health documents, indexing over 30 million records with sub-second response times.
- Implemented on-the-fly PDF segmentation, extracting relevant pages from large documents, achieving sub-3-second response for 99%+ of requests, and reducing manual lookup time by 95%.
- Delivered a secure document access layer with Okta/OAuth authentication and audit logging, ensuring full HIPAA compliance and internal data-governance standards.
Senior Back-end Engineer
Reddit, Inc.
- Built AI-powered translation pipelines that processed millions of posts daily across multiple languages, improving content discoverability and increasing daily active users by over 3%.
- Migrated legacy indexing to a modern service that reduced post indexing latency from 5 hours to under 30 seconds, filtering and processing millions of posts daily.
- Designed a multilingual sitemap generation service that expanded organic search reach by over 30%, implementing hreflang and canonical strategies across locale-specific content.
- Replaced legacy event pipelines with custom Kafka consumers, implementing rate limiting and backpressure handling to ensure stable real-time processing under high-volume loads.
- Expanded GraphQL APIs for front-end teams, adding new types, migrating fields, and optimizing upstream dependencies for production performance.
Senior Back-end Engineer
Outreach
- Migrated critical functionality from a legacy monolith to high-performance Go microservices, cutting service response times by 85% and improving deployment frequency from weekly to daily.
- Designed and maintained email indexing microservices processing over 50 million emails per day across 300,000 user mailboxes with 99.9% delivery reliability.
- Provisioned and managed microservices across eight global Kubernetes clusters, scaling to handle peak loads of over 10,000 requests per second while reducing infrastructure costs by 30%.
- Designed resilient data workflows syncing billions of records across distributed databases, maintaining 99.99% data integrity during live migrations from PostgreSQL to DynamoDB and Elastic Storage.
Senior Back-end Engineer
Gradient Cyber, Inc.
- Provided expert Go development to resolve a critical integration between the client’s cybersecurity suite and the Google Workspace API.
- Debugged an undocumented, outdated API through deep analysis and trial-and-error testing to fully reverse-engineer its workflow.
- Designed and delivered a reliable, production-ready solution where the previous implementation had failed.
Senior Full-stack Engineer
Frog Design Inc.
- Participated in Frog Design’s internal developer team, defining frameworks, standards, and workflows for delivering full-stack solutions to major clients.
- Built and maintained front-end and back-end features for Telefónica Tech, for data analytics and network management tools using React, Python, Node.js, and TypeScript.
- Developed and optimized public websites, authentication microservices with GraphQL endpoints, and data-processing algorithms for high-reliability enterprise use.
- Advised on technology strategy to select optimal frameworks and architectures for performance, cost, and scalability.
Business Intelligence Consultant
Goiko Grill
- Designed and deployed a centralized AWS data warehouse, consolidating disparate data sources to deliver new business insights and enable cross-department correlations.
- Enabled data-driven decision-making by transforming raw transactional data into actionable intelligence, while automating and optimizing database tasks to ensure accuracy and integrity.
- Provided strategic guidance on technology selection and architecture, helping the fast-growing startup scale its operations and leverage smarter data use for growth.
Lead Engineer
Eficiatech
- Founded and led a small development team, delivering tailored software solutions for diverse clients and industries.
- Supervised code quality, development standards, and project timelines to ensure high-quality, on-budget delivery.
- Acted as the primary technical liaison, translating client requirements into practical architectures and scalable implementations.
Co-founder & Consultant
Ugandi
- Launched a second-hand eCommerce platform tailored to Venezuela’s middle class, addressing local market needs.
- Developed a full-stack web application using Python and React, ensuring a smooth, secure buying and selling experience.
- Customized and integrated Odoo ERP modules to handle inventory, payments, and customer management efficiently.
Full-stack Developer
Leo Burnett
- Delivered robust web back ends in Python and responsive React front ends for high-profile clients like Oreo (Mondelez) and Farmatodo.
- Designed and implemented RESTful APIs, integrating 3rd-party services to enhance user experience and campaign reach.
- Coordinated with designers and account managers to translate creative concepts into functional, scalable digital products.
SQL Developer
Telefónica
- Optimized and consolidated sales commission databases for SAP ERP migration.
- Developed and fine-tuned SQL queries and stored procedures, significantly improving data processing speed and accuracy.
- Collaborated with cross-functional teams to map legacy data structures to SAP modules, ensuring data integrity during migration.
Experience
EOB Document Search Platform
AI SEO Translation Pipeline
Multilingual Sitemaps Service
Education
Master's Degree in Finance
Instituto de Estudios Superiores de Administración (IESA) - Caracas, Venezuela
Bachelor's Degree in Systems Engineering
Universidad Metropolitana (UNIMET) - Caracas, Venezuela
Skills
Libraries/APIs
REST APIs, React, Node.js, Google Workspace APIs, Google API, Google APIs, Office 365 API, RxJS, Django ORM, Pandas, React Testing Library, Vue
Tools
Jira, Google Workspace, Pytest, RabbitMQ, BigQuery, Terraform
Languages
Python, Go, Java, HTML, JavaScript, TypeScript, Ruby, CSS, SQL, Rust, GraphQL, C++, PHP
Frameworks
Ruby on Rails (RoR), Angular, Django, Spring Boot, LangGraph, OAuth 2, Tailwind CSS, Spring, Django REST Framework, Flask, Unreal Engine, Next.js, Ruby on Rails 6
Paradigms
Microservices, Object-oriented Programming (OOP), Inversion of Control (IoC), Automation, Agile, Requirements Analysis, REST, Microservices Architecture, Testing, API Architecture, REST API Architecture, Low-code Development, Mobile Development, Model Context Protocol (MCP), DevOps
Storage
PostgreSQL, MySQL, Databases, Microsoft SQL Server, Redis, Cloud Firestore
Platforms
Docker, Linux, WordPress, Kubernetes, Amazon Web Services (AWS), Firebase, Apache Kafka, Azure, iOS, Google Cloud Platform (GCP), Oracle
Other
System Design, Separation of Concerns (SoC), Web Technologies, Scraping, Front-end, Full-stack, APIs, Code Auditing, Stock Trading, Data Engineering, SDKs, User Authentication, API Integration, Architecture, Documentation, eCommerce, Back-end, Large Language Models (LLMs), Software System Architecture Development, System Architecture, SaaS, Multi-tenant SaaS, AI Automation, Fintech, Payments, Web Content Accessibility Guidelines (WCAG), Agentic AI, RAG Pipelines, RAG Systems, LangChain, Distributed Systems, Cost Accounting, Economics, Finance, Financial Statements, Stock Market, Valuation, Risk Management, Web Security, Web App Security, Education, Higher Education, University Teaching, No-code Development, Web Scraping, Office 365, Leadership, Technical Leadership, Learning Management Systems (LMS), CRM APIs, Artificial Intelligence (AI), Mobile App Development, User Experience (UX), Healthcare IT, Tax Accounting, Workday, Containerization, SEO Tools, Sitemaps
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