Design Engineer

Nubank; United States; On-site; USD 150,000 - 210,000; Full time

Job summary

Nubank is building the first engineering hire for its Design Center of Excellence to scale design and research tooling. You will architect systems that enable designers and researchers to leverage AI-powered tools at scale.

You'll collaborate with design and research teams, scope projects, and ship robust infrastructure with strong observability, while shaping the tools and platforms the function will rely on for years.

Qualifications

• Experience architecting UX systems at scale.
• Proven ability to design design tooling for designers/researchers.
• Front-end infrastructure knowledge and system architecture skills.

Responsibilities

• Architect and build the core design systems and tooling.
• Sit with designers and researchers to understand needs and scope solutions.
• Stand up or reuse infrastructure, write code, and ship to the CoE.
• Instrument what you build with metrics and observability.
• Own the CoE tooling roadmap and coordinate with minimal PM support.

Skills

UX systems

Design systems

UI platform

AI tooling

Agentic tools

Frontend infra

System architecture

Job description

About Nu

Nu serves more than 140 million customers, guided by a mission to fight complexity and empower people. The company has been leading an industry transformation through innovative products and human-centered services.

Proprietary technology and data at scale power Nu's digital platform, built to promote financial access, advancement, and transparency. Its business model thrives on customer love and lower costs, feeding a flywheel of growth and profitability.

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About the role

We're looking for an outstanding engineer with a real passion for design.

Nubank's design and research function is roughly 260 people. Over the past year they have been building their own tooling: something like 100 AI-assisted solutions and 30+ local knowledge repositories, each built inside a business unit to solve that unit's problem. Most of them work. None of them talk to each other.

The Design Center of Excellence exists to turn that kind of local invention into systems the whole function can build on. It has design ops and research ops. It does not have an engineer - which means the CoE can identify a need, specify a tool, and then has no one to build it.

This is that hire: the first engineer in the CoE, and the person who architects the systems that let design at Nubank scale. You'll work directly with the designers and researchers who use what you build, and the person who scopes a system is the person who builds it.

What you'll work on

NuBrain - the first priority. A global knowledge system for the design and research function, consolidating the 30+ local repositories that already exist. The hard part is not merging content; it's the context architecture - how retrieval is structured, how token consumption stays sane, and how content reaches people and agents at the moment it's useful.

A design quality measurement platform. The function knows what good looks like and has the parameters written down; scoring a flow against them is currently a manual exercise in Figma. The goal is an index - a real number for the quality of a given experience - produced by a system, not a spreadsheet.

Canonicalizing what already exists. Roughly 100 AI solutions have been built locally by designers and researchers. Someone needs to understand what they are, decide what becomes standard for the function, and retire the rest before the duplication compounds.

Deciding the shape of the answer. Plugin, MCP server, agent, Claude skill, or a full platform - that call is yours to make and defend. Part of the job is telling the CoE that the tool they asked for should be something else.

What you'll do

• Architect and build the systems design at Nubank runs on - increasingly agentic ones.
• Sit with designers and researchers, understand the need underneath the request, and turn it into something scoped and buildable.
• Stand up or reuse the infrastructure, write the code, and ship it to the function.
• Instrument what you build. Metrics and observability are part of the deliverable, not a follow-up.
• Own the roadmap for CoE tooling: prioritize, sequence, say no, and keep things moving without a PM behind you.
• Be the technical voice in a design organization - make trade-offs legible to people who don't read code.

What we're looking for

An outstanding, deeply experienced engineer. This is an engineering hire first. You've spent years building systems other people build on.

A track record architecting UX systems. Before AI, you designed and built the foundations of user experience at scale - design systems, component platforms, UI frameworks, front-end infrastructure used by many teams.

Backgrounds that tend to fit

• Design systems and UI platform engineers at design-led product companies.
• Engineers at design tooling companies.
• Engineers who have been building AI and agentic tools for designers - in their day job, in open source, or in public.
• Founders and technical leads who were the engineer behind a design-led product.

What this role is not

• Not a designer who codes. The engineering bar is the bar.
• Not a generalist backend or infrastructure role. UX systems experience is core.
• Not customer-facing mobile product work. This is