Bruno Paulino

Senior Backend Engineer

Buffer

Feb 2026 - Current (7 months)

Working across a large TypeScript monorepo (React, Node.js, GraphQL, MongoDB) that powers social media management for hundreds of thousands of customers. My work sits at the intersection of product and platform. I partner closely with product managers to shape new features from the earliest design conversations, then lead them end to end, from schema design through backend services to the UI. On the platform side, I take on the cross-cutting work that keeps a long-lived codebase healthy: large-scale migrations of core infrastructure, observability and instrumentation tooling, dependency modernization, and the developer experience of a codebase shared by many teams. I'm also deeply invested in AI: building features that put it to work for

Lead Software Engineer | Assistance (Live Channels & AI Assistant)

Ñ

May 2025 - Feb 2026 (10 months)

Leading two teams within the Assistance segment: Live Channels, which powers our real-time chat support for customers, and Virtual Assistant, which leverages LLMs, and Retrieval-Augmented Generation (RAG) to deliver more tailored experiences at scale. My focus has shifted toward AI engineering, devising solutions with LLMs, vector databases, prompt engineering, and RAG pipelines to create reliable, scalable, and context-aware customer support systems. Alongside building the technical foundation, I’m partnering with cross-functional teams to ensure our conversational AI is not just innovative, but also trustworthy and customer-centric. As with previous roles, I continue to combine deep technical problem-solving with leadership, guiding tea

Lead Software Engineer | Platform Engineering | Web

Ñ

Feb 2021 - May 2025 (4 years 4 months)

As a Tech Lead at N26, I’ve been driving technical excellence and cross-team collaboration to evolve our platform into a scalable, resilient, and developer-friendly ecosystem. From shipping critical fixes in my first week to re-architecting our monorepo for multi-app deployments, I’ve consistently tackled high-impact challenges head-on. Key highlights include reducing build times from 30min to 2min, eliminating a long-standing dev server crash, and migrating Redis to a production-grade clustered setup. Beyond code, I’ve focused heavily on mentorship and team growth, scaling our team from 1 to 5 engineers, mentoring seniors toward leadership roles, and supporting cross-functional initiatives like the Statsig rollout, which enabled type-safe

Senior Software Engineer

WOOM

Apr 2018 - Jan 2021 (2 years 10 months)

Working at woom is a joy and challenging at the same time. We deal with a large scale infrastructure that spams across many continents (EU, North America, Asia) and yet we are still a startup with a very small and efficient team. and cmon! we make bikes for kids. How cool is it? isn't just cool, it's awesome! On the technical side, I am writing high-scale, cloud-based applications using Scala and the Play framework for high concurrency and high availability for our very international and remote team. I am currently focused on rebuilding our whole international e-commerce experience from scratch using Typescript, GraphQL and Vue.js using Nuxt. On top of that, I deeply care about soft skills, mainly focusing on good communication and team

Senior Software Engineer

Journi

Sep 2016 - Apr 2018 (1 year 8 months)

Actively working on our Scala backend, PostegreSQL database and frontend using functional programming. Using Scala as the main programming language in our backend and Javascript together with React.js in our frontend. Also working with DevOps using SaltStack and TeamCity to automate our entire deployment process and servers management. On the mobile side I have worked with iOS development, mainly using the Swift programming language and the iOS Cocoa Touch framework.

Software Engineer

Phoebus

Oct 2015 - Feb 2016 (5 months)

Working on our Point-of-sale end-2-end solution, I had the opportunity to implement a diverse set of features in our highly performant Java backend, including secure payload transfers from our custom POS software and different service providers. I also had the opportunity to work on the POS frontend system, which was quite challenging due to the screen size limits in size and information density.

Software Engineer

Embraer

Jun 2015 - Aug 2015 (3 months)

Design and development of a Web Based Application for Project Management and Internal Excellence Program (Embraer P3E)

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Software Engineer - Military Unit

Policia Militar da Paraíba

Dec 2011 - Sep 2016 (4 years 10 months)

Once I truly discovered my passion for Software Engineering, I could not get enough of learning and had the chance to apply as I started working full-time as software engineer at the Police HQ. One application that is still in production today is a general purpose Authentication API using the Inversion of Control principle with fine-grained permissions controls I architected and Implemented in Scala for token based authentication consumed by a wide range of internal clients like web and Android. I also onboarded and trained other developers on our existing applications, including recording screencasts with step-by-step tutorials.

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Military Police of Paraíba State

Policia Militar da Paraíba

Mar 2009 - Dec 2011 (2 years 10 months)

That might sound unusual, but before becoming an engineer, I was working to reduce crime in Brazil. After some years, I started working as the "IT Guy" and later learning about software engineering at university.

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