Backend Engineer, Internationalisation
Stripe is hiring a Backend Engineer, Internationalisation in Barcelona, Spain. Level rates it ; you can apply on Stripe.
Level's read on this job
- Works on AI ●●●○ is how Level rates this software engineer role: the daily work is on AI products, without building the model.
- The posting mentions LLM Services, Translation Management Systems and backend engineering among its tools and skills.
- Level classes it as a mid-level role.
- Stripe has 765 other open roles on Level.
- Posted in the last few days.
AI in this role
Backend engineer building and evolving production LLM capabilities for Stripe's internationalisation platform.
Who we are
About Stripe
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.
About the team
The Internationalisation team builds the platform that helps Stripe products work naturally across languages and markets. We create and operate the infrastructure that enables Stripe teams to localize product interfaces, services, and written communications while delivering consistent, high-quality experiences to users around the world.
We work closely with our sister Localization team and its language experts, as well as with product and service engineering teams integrating localized content. Together, we combine engineering, automation, and linguistic expertise to help Stripe build products that feel native to each market.
What you’ll do
You will design, implement, and maintain Stripe’s internationalisation platform at scale, including the developer and user experiences around it. You’ll help teams continuously localize their products while improving the quality, speed, reliability, and efficiency of Stripe’s localization processes.
This role combines backend and platform engineering with emerging LLM technology. Depending on the project, you may build end-to-end functionality for internal customers, evolve production LLM systems, develop quality-evaluation capabilities, improve platform reliability and observability, or lead migrations from legacy localization infrastructure.
Responsibilities
- Design and build internationalisation infrastructure that supports diverse content surfaces, including backend services, product interfaces, and written communications.
- Integrate localization into Stripe’s software-development and content-production workflows, enabling teams to ship translated experiences continuously and safely.
- Build and maintain integrations with translation-management systems, LLM services and external localization providers.
- Evolve Stripe’s existing production LLM capabilities to improve translation quality, market relevance, turnaround time, and operational efficiency.
- Develop automated quality checks and human-evaluation workflows that combine LLM-driven automation with expert linguistic judgment.
- Maintain a high bar for reliability through effective testing, monitoring, alerting, and operational processes.
- Own ambiguous, high-impact initiatives end to end—from research and experimentation through implementation, launch, measurement, and iteration.
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.
Minimum requirements
- Strong coding skills in any programming language (we understand new languages can be learned on the job so our interview process is language agnostic)
- Experience developing reliable infrastructure, platform, or backend-service solutions.
- Strong product judgment and a commitment to building high-quality user and developer experiences.
- Ability to own ambiguous work end to end and make progress through research, experimentation, and iteration.
- Strong written and verbal communication skills, with the ability to work effectively in a collaborative, cross-functional environment.
Preferred qualifications
- Experience building or operating production LLM or machine-learning systems.
- Experience evaluating LLM output or combining automated systems with expert human review.
- Familiarity with internationalisation, localization, translation, or content-management workflows.
- Experience with CI/CD systems, developer platforms, or workflow infrastructure.
- Backend engineering experience building services using programming languages such as Java, Ruby, or Go.
- Experience building internal platforms that ultimately support customer-facing products.
How we rate this
Backend Engineer, Internationalisation at Stripe rates 65 out of 100 for how much of the daily work is AI. That makes it Works on AI (AI Level 3 of 4). The level is about AI in the job, not seniority.
Works on AI. The daily work is on AI products, without building the model.
- ●●●● Builds AI80 to 100
- ●●●○ Works on AI60 to 79
- ●●○○ Uses AI40 to 59
- ●○○○ Little AI0 to 39
Levels come from how often the tools, models and workflows of the role are named in the posting itself. Read the description and count the AI tools, models and workflows it names.
Prepare for this job
Built from this posting and from similar jobs on Level.
Skills and AI tools this role asks for
Also common in software engineer jobs at this level
Pay
- Typical software engineer job
- $167k
This posting doesn't list pay. Use the typical software engineer figure when pay comes up. See software engineer jobs
Questions you could be asked
- Tell me about a project where backend engineering was part of your work. What did you do?
- Tell me about a project where platform engineering was part of your work. What did you do?
- Tell me about a project where llm systems was part of your work. What did you do?
- Tell me about a project where localization was part of your work. What did you do?
- Walk me through how you've used LLM Services in your day-to-day work.
Adapt your resume
- List these exact terms on your resume: Backend Engineering, Platform Engineering, LLM Systems, Localization, and LLM Services. An applicant tracking system matches the wording, not the idea.
- Attach one line of real, concrete experience to at least one of them. A tool named with nothing behind it rarely survives a human read.
- Show where AI is part of your daily process, not a one-off project. This role expects it to be a running habit.
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