Pablo Nicolás Estevez

Software Engineer | Backend Python Developer

Dublin, Ireland | Python · FastAPI · SQLAlchemy · AWS

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About Me

I'm a passionate Backend Python Developer with 6+ years of experience designing and building efficient, scalable systems for the financial and technology sectors.

From Buenos Aires to Dublin, I've worked across fintech startups and consultancies delivering APIs for Fortune 500 clients, architecting serverless solutions on AWS and GCP, and leveraging GenAI to power modern user experiences.

Currently based in Dublin, Ireland, I'm a Software Engineer at Learnosity, developing new solutions on the assessment ecosystem.

I'm also an active open-source contributor — I've typed the MySQL dialect of SQLAlchemy (200+ functions across 30+ files), and authored my own testing library, aiointercept.

Key Highlights

  • 6+ years building Python backend systems in fintech
  • 2x–10x performance improvements through profiling and refactoring
  • Open source author and contributor to SQLAlchemy, Moto, Snowflake, Django
  • Google Professional Cloud Developer certified
  • Experience with AWS Lambda, SQS, DynamoDB and GCP Cloud Functions
  • English C1 · Spanish native · Based in Dublin with full work rights

Professional Experience

Software Developer

Learnosity — Dublin

Jul 2026 - Present
  • Develop and maintain backend services for an ed-tech assessment platform used at scale
  • Collaborate with cross-functional teams to ship reliable, well-tested features
  • Contribute to code quality, performance, and production readiness of core systems
PythonBackendTesting

Software Engineer

Gr4vy — Remote

Apr 2025 – Jul 2026
  • Integrate with financial APIs using Python, Pydantic, and cloud-native tools
  • Contribute to CI/CD workflows and ensure production readiness of backend systems
  • Collaborate in agile cross-functional teams to deliver secure, scalable financial services
PythonPydanticCloud-nativeCI/CD

Senior Python Developer

Trinetix — Buenos Aires

Jun 2024 – Apr 2025
  • Developed scalable systems for Fortune 500 clients using Python, FastAPI, SQLAlchemy, DynamoDB, and Docker
  • Built serverless and event-driven architecture with AWS Lambda and SQS
  • Leveraged GenAI to build innovative solutions and optimise existing platforms
  • Collaborated with the React frontend team in an agile cross-functional environment
FastAPISQLAlchemyDynamoDBDockerLambdaSQSGenAI

Backend Developer

Adcap Grupo Financiero — Buenos Aires

Feb 2023 – Jun 2024
  • Developed and optimised REST APIs for financial services using FastAPI
  • Managed both relational and non-relational databases to optimise data storage and retrieval
  • Participated in the full software development lifecycle, from requirements to deployment
  • Collaborated with cross-functional teams to deliver query services and technical support
FastAPIPostgreSQLDynamoDBSQLAlchemy

Back End Developer

Cripto Spot — Remote

Jan 2022 – Nov 2022
  • Lead backend developer for a crypto investment platform, a PvP game, and an incremental game
  • Designed robust backend architecture with Django and real-time communication via Django Channels and Redis
  • Managed DevOps on AWS, optimising deployment pipelines and infrastructure
DjangoDjango ChannelsRedisAWS

Full Stack Developer

Freelance — Remote

Jun 2021 – Jan 2022
  • Full-stack development of a platform for normalisation, reconciliation, and processing of banking and ERP data
  • Built with Django, Pandas, and PostgreSQL
DjangoPandasPostgreSQL

Software Developer

La Casa del SEO — Remote

Jan 2021 – Apr 2021
  • Conducted web scraping and data processing, integrating NLP to analyse and structure text data
PythonNLPWeb Scraping

Education & Certifications

Bachelor's Degree, Sociology

Universidad Nacional de San Juan

2013 – 2021

Professional Cloud Developer

Google Cloud Certification

October 2024

Scrum Fundamentals Certified

SCRUMstudy

Operating Kubernetes on IBM Cloud

IBM

Serverless Applications on Cloud Run

Google Cloud Skill Badge

Open Source

Contributing to the Python ecosystem

aiointercept

author

Original testing library — aioresponses-like package with a real aiohttp server for accurate async HTTP testing. Published on GitHub.

Pythonaiohttptesting

SQLAlchemy

contributor

Typed the entire MySQL dialect — more than 200 functions across 30+ files, significantly improving type safety for one of Python's most-used ORMs.

PythonSQLAlchemyMySQLtype hints

auto-improvement

10 author

Python automation toolkit with 10 stars on GitHub. Available on PyPI.

Pythonautomation

Bug Fixes & Improvements

contributor

Bug fixes and improvements submitted to widely-used open-source projects in the Python ecosystem.

MotoSQLAlchemySnowflake ConnectorDjango

SaveDiskSpace

author

A toy tool that shrinks large videos on Google Drive without leaving the browser — pick files with the Google Picker, a Go backend re-encodes them with FFmpeg, and writes the smaller file back to Drive only when it's actually smaller. Live at drive.pablo.ie.

GoReactFFmpegCloud Run

Skills

Programming

Python FastAPI Pydantic Django aiohttp Redis Pandas

Databases

PostgreSQL DynamoDB SQLAlchemy NoSQL SQL

Cloud & DevOps

AWS Lambda SQS CloudWatch API Gateway GCP Terraform CloudFormation Docker Kubernetes Git

Testing & Monitoring

Pytest Mypy Sentry type hints CI/CD

Notable Achievements

2x–10x Performance

Optimised application performance through profiling and code refactoring, achieving significant speed improvements in production systems.

Legacy Migration

Migrated a legacy application with extensive custom code to a scalable FastAPI-based solution, reducing technical debt and improving maintainability.

SQLAlchemy v1 → v2 Migration

Led a complex migration from SQLAlchemy v1 to v2 ensuring stability and performance improvements across a large codebase.

Get In Touch

Open to new opportunities, collaborations, and conversations about Python, fintech, or open source.

pablo22estevez@gmail.com
LinkedIn GitHub Stack Overflow