Bruno Santos

Lead Software Engineer Backend Specialist Technical Leader
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Professional Summary

Seasoned software engineer with 17+ years of experience designing, building, and scaling backend systems for high‑impact products. I combine deep technical expertise in Elixir, Ruby, and distributed architectures with a leadership style rooted in trust, clarity, and shared ownership.

I thrive at the intersection of craftsmanship, mentorship, and measurable results—delivering systems that perform, teams that grow, and solutions that make a difference. Driven by curiosity, collaboration, and the belief that the best software is built by empowered teams.

Skills

Languages & Frameworks
Elixir, Phoenix, LiveView, Ruby, Ruby on Rails, TypeScript, React, GraphQL
Databases & Data Stores
PostgreSQL, MySQL, Redis, Elasticsearch, Neo4j
DevOps & Infrastructure
Docker, Kubernetes, AWS, Google Cloud Platform (GCP)
Messaging & Queueing
RabbitMQ
Practices & Methodologies
TDD, CI/CD, Scrum, Kanban, Pair Programming
Other
API design, Microservices architecture, Distributed systems, Performance optimization

Professional Experience

Lead Software Engineer - Shopnomix

Jul 2024 - Current
  • Architected a high-performance ad bidding platform using Elixir and Phoenix LiveView, supporting real-time tracking and optimization for thousands of concurrent bids.
  • Designed PostgreSQL data models that improved query efficiency by **40%**, enabling faster and more accurate ad placement decisions.
  • Led a company-wide adoption of TDD, reducing production defects by **35%** and shortening deployment cycles.
  • Mentored engineers, fostering a culture of quality, open communication, and continuous learning.

Senior Software Engineer - Allovue, Inc.

Mar 2022 - Aug 2024
  • Spearheaded the development of a state-funded educational finance portal, enabling transparency and efficiency in public school budgeting.
  • Modernized and expanded the core of existing school finance products, improving performance and scalability for thousands of end-users.
  • Championed Elixir/Phoenix adoption to enhance maintainability and speed of feature delivery.
  • Collaborated closely with product and design teams to align technical direction with user needs.

Senior Software Engineer - Remote Technology, Inc.

Aug 2021 - Mar 2022
  • Built custom HR platform integrations with robust bidirectional data synchronization via APIs and webhooks.
  • Improved system reliability and reduced integration errors through proactive monitoring and automated testing.
  • Enhanced developer experience by refining CI/CD workflows.

Senior Software Engineer - Foxbox Digital

Jun 2020 - Jul 2021
  • Designed and delivered ecommerce solutions integrating Elixir/Phoenix, Ruby on Rails, React, and ElasticSearch with platforms like Shopify and Salesforce.
  • Developed ecommerce analytics systems integrating BigQuery, Google Sheets, and multiple data pipelines.
  • Contributed to architecture decisions across multiple projects, ensuring scalability and maintainability.
  • Interviewed backend candidates and mentored team members.

Time off to recharge and focus

Jan 2020 - May 2020

Senior Software Engineer - XING GmbH & Co. KG

Oct 2018 - Dec 2019
  • Delivered new features for Ruby on Rails applications while guiding Elixir adoption for greenfield projects.
  • Designed APIs in close collaboration with frontend teams, improving API usability and consistency.
  • Worked within cross-functional teams to deliver value using Scrum and Kanban.

Backend Team Lead - Wunder Carpool

Feb 2017 - Sep 2018
  • Managed a team of backend engineers, conducting 1:1s, mentoring, and guiding technical decisions.
  • Planned and shipped features with a focus on scalability and maintainability.
  • Migrated portions of the system to a graph database, improving data modeling capabilities.
  • Managed and mentored a team of 7 engineers, improving team productivity through effective coaching and process optimizations.
  • Led migration of a legacy Ruby API to Elixir microservices, reducing system downtime by 40% and improving API response times by 70%.
  • Directed migration of key data services to Neo4j, enhancing query performance by 50% and significantly simplifying data structures.
  • Streamlined feature planning and execution processes, reducing feature delivery timelines by 20%.
  • Collaborated closely with mobile and frontend teams to enhance integration processes, decreasing integration errors by over 30%.

Senior Software Engineer - TIDY Homekeeping

Mar 2016 - Jan 2017
  • Worked on the backend building an API using Ruby on Rails, PostgreSQL, Redis, Sidekiq and Docker, which supported multiple web and mobile applications
  • Built a small PoC using Elixir and Phoenix

Software Engineer - Quimbik, Inc.

Aug 2012 - Feb 2016
  • Developed several websites using Ruby on Rails, MySQL and Javascript
  • Built REST APIs with Ruby on Rails that were consumed by mobile apps
  • Helped in projects with other technologies such as Objective-C, Groovy/Grails, and Java

Earlier Experience

  • Senior PHP Developer - FPP EDU-Media, Inc. ( 2010 - 2012)
  • Web Developer - WAD Soluções para Internet ( 2008 - 2010)
  • Delphi Developer - BWN Aplicativos ( 2007 - 2008)