Pablo Bello · Portfolio
v.2026 · Senior Software Engineer · 10+ yrs
Engineer at large · Brazil / Remote · Available 2026

Pablo Bello.

Senior Software Engineer

Ten years building scalable backend systems and AI-enabled products in Ruby, Python, TypeScript and Go — with a track record of impact in performance, reliability and product delivery.

01 Stack & capabilities Tools I reach for
Top language
Ruby
Also fluent
Python
Also fluent
TypeScript
Learning deeply
Go
Frameworksbackend · frontend
Ruby on Rails · React · FastAPI · Phoenix / LiveView · Angular
Infrastructurecloud · runtime
AWS · Docker · Kafka · Sidekiq Batches · Datadog
Databasesrelational · document
PostgreSQL · MySQL · MongoDB · SQLite · pgvector
APIs & architecturecontracts · style
GraphQL · REST · Event-Driven Architecture · TDD
AI & dataLLM tooling
RAG · LLM integration (Claude / GPT) · Semantic search · Prompt engineering
02 Selected work Two current projects
№ 01
Tasker · AI Project Management Live

AI Project Management Platform.

Linear-style task manager with an AI assistant for conversational queries and autonomous actions — insights, task creation, messaging. Built on an event-driven architecture with a hybrid agentic approach: function calling for structured operations and RAG with pgvector for semantic retrieval.

Rails 8GraphQLReactApolloClaude Sonnet 4.5
Visit mytasker.app
Tasker — AI Project Management Platform
fig. 01 · tasker.app 2026
№ 02
Agendr · AI Scheduling Platform Live

Conversational Appointment Booking.

Conversational appointment booking with an event-driven architecture. An AI assistant powered by LangChain and RAG (pgvector) handles WhatsApp automation and multi-channel support — meeting users wherever they already are.

ElixirPhoenixGraphQLReactApolloOpenAI
Visit agendarconsultas.com
Agendr — AI Scheduling Platform
fig. 02 · agendarconsultas.com 2026
03 Experience Four roles · in reverse chronology
№ 01
Intercom Feb 2025 — Aug 2025 AI / Customer Support
Product Engineer III

Built evaluation and testing infrastructure for Fin AI across Rails, TypeScript / React and Python. Shipped core Test page capabilities used by 50%+ of adopting companies, launched Impersonation to open beta for thousands of customers, and improved Messenger reliability for millions of end users by fixing four critical bugs.

Ruby on RailsTypeScriptReactPythonLLM OrchestrationRAGEvaluation
№ 02
Smart Pension Sep 2022 — May 2024 Pensions / Finance
Senior Software Engineer

Led a critical investment data pipeline with Sidekiq Batches, reducing end-to-end processing time by 90%+. Implemented Datadog monitoring on AWS, designed a real-time funds calculation service that increased processing speed by 50%, and achieved 99.2% test coverage for the Holdings API.

Ruby on RailsSidekiqAWSDatadog
№ 03
Medical Residency Exam 2021 — 2022 EdTech
Co-founder & Lead Engineer

Built and launched a full-stack exam platform with Elixir / Phoenix + LiveView, serving 6,000+ paying doctors in Brazil. Delivered registration and payments, secure exam distribution with end-to-end encryption, and an admin portal for exam operations — then deployed and operated it on AWS with PostgreSQL.

ElixirPhoenixLiveViewPostgreSQLAWS
№ 04
Arbnco Jun 2018 — Sep 2021 Renewable Energy
Lead Engineer

Progressed from Senior Software Engineer to Lead Engineer, leading five developers across four projects. Drove backend delivery with Ruby on Rails, introduced GraphQL across multiple products, and integrated REopt Lite API and NREL SAM to expand renewable-energy capabilities.

Ruby on RailsAngularGraphQLPostgreSQL
Earlier roles
№ 05–06
  • Senior Full Stack Engineer Rockstar Coders 2017 — 2018
  • Software Engineer Brazil Technology 2014 — 2016
04 Writing Notes from practice
№ 01 2025 Ruby on Rails Solid Queue — how to get started. A brief guide on getting started with Solid Queue in Ruby on Rails, covering setup, job enqueuing, and comparing it with Sidekiq.
05 Education Formal
№ 01 B.Sc. Computer Science Federal University of Piauí (UFPI) 2009 — 2014
pablobello.dev · portfolio · v.2026 · ed.01 typeset in Fraunces · Inter · JetBrains Mono