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Backend Engineer, UI Platform

On-site in Barcelona·Added yesterday (last checked 27 Oct)

Stripe

8 open roles

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Our summary

Work mode: On-site, Barcelona
English: Required
Experience: 2+ years

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Skills

Nice to have

GraphQL

Requirements

What we're looking for

Fluency in using AI-assisted and agentic development tools as part of day-to-day software engineering, including critically reviewing, validating, and improving generated code
2+ years of professional software engineering experience, or equivalent practical experience, building, shipping, and operating production systems
Strong knowledge of backend technologies and infrastructure, including the fundamentals of APIs, data storage, distributed systems, and production operations
Ability to independently scope and deliver open-ended software projects, making practical technical and product tradeoffs with limited oversight
Strong problem-solving and debugging skills, with attention to testing, maintainability, reliability, and user impact
Strong written and verbal communication skills and the ability to collaborate effectively with frontend engineers, product engineers, and infrastructure partners

Nice to have

- Experience building backend-for-frontend systems, UI platform services, developer platforms, or shared infrastructure
- Experience designing or integrating APIs, including GraphQL APIs
- Experience with high-throughput event ingestion, feature flag or experimentation systems, or other latency-sensitive platform services
- Familiarity with caching, asynchronous systems, configuration systems, or data-consistency tradeoffs
- Experience executing large migrations using automated validation, shadow traffic, feature flags, or staged rollouts
- Experience using data, developer feedback, or operational signals to improve a platform or developer-facing product

The role

Stripe is a financial infrastructure platform for businesses. Millions of companies-from the world's largest enterprises to the most ambitious startups-use Stripe to accept payments, grow their revenue, and accelerate new business opportunities. Our mission is to increase the GDP of the internet, and we have a staggering amount of work ahead. That means you have an unprecedented opportunity to put the global economy within everyone's reach while doing the most important work of your career.

What you'll do

As a Backend Engineer on the Sail Services team, you'll help build and evolve the systems that power Stripe's user interfaces. You'll independently drive software projects from problem definition through production, working closely with other UI Platform engineers, product teams, and infrastructure partners. Your work will range from APIs and GraphQL integrations to edge systems, architectural migrations, and the tooling needed to operate them safely at scale.

Take end-to-end ownership of software projects, aligning on priorities and then independently scoping problems and carrying solutions through design, implementation, testing, rollout, and operation
Design, build, and operate reliable, scalable APIs and backend systems that support Stripe's Dashboard, mobile applications, and other user interfaces
Help modernize Stripe's UI architecture through incremental migrations, automated validation, shadow traffic, and carefully controlled production rollouts
Improve the reliability, observability, performance, and operability of services on critical user paths
Partner with frontend, backend, and infrastructure engineers to understand their needs and turn recurring problems into reusable platform capabilities
Use AI-assisted and agentic development workflows to improve implementation, testing, validation, and delivery
Contribute thoughtful code reviews, technical discussions, documentation, and runbooks that improve the quality of the team's work

Who you are

We're looking for someone who meets the minimum requirements to be considered for the role. If you meet these requirements, you are encouraged to apply. The preferred qualifications are a bonus, not a requirement.

Hiring process

3 steps2 interviewsa task to doa few weeks for some roles, longer for others in all

Recruiter screen
With a recruiter
Technical or skills-based assessment
Interviews with the team
With the hiring team
A series of interviews with the team you would be joining.

Stripe says it tries to work quickly and give clear feedback at every stage.

About Stripe

Stripe is a global financial infrastructure and payments platform company that builds economic infrastructure for the internet. Founded in 2010, the company provides a suite of APIs and software tools that enable businesses of all sizes to accept payments, manage subscriptions, and handle complex online commerce. Stripe processes billions of dollars in transactions annually and serves millions of businesses worldwide, from startups to large enterprises like Amazon, Google, and Salesforce.

Stripe has a significant presence in Spain, with offices in Madrid and Barcelona serving as key hubs for its Iberian market operations. The company is known for its strong engineering culture, high technical bar, and a work environment that attracts international talent. For international professionals, Stripe offers a highly collaborative, remote-friendly environment with competitive compensation and a strong focus on career growth, making it an attractive destination for those looking to work on cutting-edge financial technology in a European hub.

Industry: Fintech
Founded: 2010
Employees: 5,000–10,000
Headquarters: San Francisco, USA
In Spain: Madrid

Good to know if you are moving

Stripe is a remote-first company, allowing employees to work from anywhere in Spain, with a strong hub in Madrid.
The company offers a comprehensive relocation package for international hires, including visa sponsorship and assistance with Spanish bureaucracy.
Stripe's compensation is highly competitive, with strong equity packages and a transparent pay formula.
The company has a strong engineering culture with a high bar for technical excellence, making it a great fit for senior engineers.
Stripe's product suite is used by millions of businesses, offering exposure to massive scale and complex technical challenges.

In their own words

About the company & team

The UI Platform team, known as Sail, builds the foundations behind Stripe's Dashboard and many other user interfaces. Sail Services owns the systems that evaluate feature flags and experiments, ingest frontend analytics, and improve Dashboard load times for Stripe's largest merchants.

We build backend-for-frontend capabilities that connect Stripe's backend systems to its UI platform. This gives product teams a consistent way to build and operate user experiences without recreating the same infrastructure.

All open roles at Stripe