Staff Engineer - Client Experience

Yuno; Madrid; Remote; EUR 120,000 - 180,000; Full time

Benefits offered by this job

Competitive Compensation

Remote Work

Home Office Bonus

Work Equipment

Stock Options

Health Plan

Flexible Days Off

Growth courses

Job summary

Yuno is seeking a Staff Engineer to lead technical strategy and architecture for global payment systems. You will mentor engineers, shape architecture, and tackle the hardest challenges while building scalable, maintainable solutions in an AI-native environment.

This hands-on leadership role emphasizes design, code, and mentoring; you will influence the platform direction and ensure robust delivery across teams, including performance optimization and quality control.

Qualifications

• Extensive software engineering experience with Go and/or Kotlin and full-stack proficiency.
• Strong track record designing robust, scalable systems with solid architecture principles.
• Proven ability to solve complex technical problems and deliver innovative solutions.
• Experience with AWS and cloud-native services (RDS, ECS, EKS, S3).
• Excellent automated testing practices — unit, integration, end-to-end — in Agile/DevSecOps/CI/CD.
• Proven technical leadership — mentoring engineers and driving strategy and delivery.
• Strong problem-solving and analytical skills; quick issue resolution.
• Advanced English both written and spoken.

Responsibilities

• Provide technical leadership and mentorship to engineers; raise the bar for excellence.
• Architect and design robust, scalable, maintainable systems across the platform.
• Drive the delivery of complex, cross-team projects meeting business goals and timelines.
• Contribute to technical vision and roadmap aligned with company goals.
• Collaborate with product, design and stakeholders; translate concepts for diverse audiences.
• Ensure quality and performance through efficient algorithms, clean code, and thorough testing.

Skills

Go/Kotlin backend

Architecture design

AWS/cloud-native

Automated testing

Technical leadership

Problem solving/analytical

English proficiency

Tools

Kubernetes

Docker

Terraform

GitHub Actions

ArgoCD

Datadog

OpenTelemetry

PostgreSQL

Redis

Spring Boot

Spring WebFlux

Job description

+8 Years of ExperienceStaff Engineer - Client Experience

Who We Are

Yuno is the AI-native operating system of global commerce, powering the financial infrastructure of enterprise merchants, banks, and wallets. Through a single API, Yuno connects them to pay-ins, payouts, fraud prevention, KYC/KYB, and stablecoins globally, so they can operate everywhere. Agnostic by design and connected to 1,000+ payment methods and 460+ integrations in 190+ countries, Yuno optimizes acceptance rates, reduces costs, and strengthens security through specialized AI agents that learn from every transaction. Global brands including McDonald's, NetEase Games, GoFundMe, and Rappi run their payments on Yuno.

About The Role

Yuno is looking for a Staff Engineer to be a senior technical leader across our engineering organization — architecting the robust, scalable systems that process payments for global brands, and raising the technical bar for the teams around you. You'll take on our hardest technical problems, shape architecture and technical strategy, and turn complex, real-world payment challenges into elegant, maintainable solutions.

This is a hands?on leadership role. You'll still design and build, but your impact comes as much from mentoring engineers, driving technical vision, and making the decisions that shape the platform's direction as from the code you write.

How AI Shows Up in This Role

As a Staff Engineer at an AI-native company, you'll shape how AI is used across engineering — architecting AI-native systems and helping define the AI-driven development practices the whole org adopts AI is our default execution layer: you're expected to use AI-assisted tooling fluently across design, implementation, testing, and review, and to bring good judgment to how the team does the same.

Your Contribution Will Be

• Technical leadership and mentorship — set a high bar for technical excellence, mentor and coach engineers, and foster a culture of continuous improvement across the team
• Architecture and system design — architect and build robust, scalable, and maintainable systems, tackling the deepest technical complexity in the platform
• Complex delivery — drive the successful delivery of complex, cross-team projects, making sure they meet business goals and ship on time
• Technical vision and strategy — contribute to the technical vision and roadmap, and help define and execute engineering strategy aligned with company goals
• Cross-functional collaboration — work closely with product, design, and stakeholders, translating technical concepts clearly for technical and non-technical audiences alike
• Quality and performance — optimize performance and scalability through efficient algorithms and clean code, and safeguard quality through rigorous testing and reviews

Skills You Need

Minimum Qualifications

• Extensive software engineering experience, with deep expertise in Go and/or Kotlin (our core backend stack) and strength across the full stack
• A proven track record designing and building robust, scalable, and maintainable systems, with a solid grasp of architecture principles, design patterns, and best practices
• Demonstrated ability to solve complex technical problems and deliver innovative solutions
• Strong experience with AWS and cloud-native services (RDS, ECS, EKS, S3, and similar)
• Excellent automated testing practices — unit, integration, and end-to-end — within Agile, DevSecOps, and CI/CD workflows
• Proven technical leadership — mentoring and coaching engineers, and driving technical vision, strategy, and delivery of complex projects
• Strong problem-solving and analytical skills, with the ability to diagnose and resolve issues quickly
• English — advanced proficiency, written and spoken

Preferred Qualifications

• Experience in the payments or fintech industry, operating at global scale
• Performance optimization and efficient algorithms for high-throughput, low-latency systems
• Static analysis and code-quality tooling (e.G., SonarQube) and mature CI/CD pipelines
• Python or other languages for data, tooling, and automation

Nice to Have

• A track record of introducing new engineering practices or standards across multiple teams
• Open-source contributions or technical writing that raised the bar for others

Tech Stack

• Languages — Go and Kotlin (core), Java
• Frameworks — Spring Boot, Spring WebFlux; Go standard library
• Messaging — Apache Kafka, SQS
• Databases — PostgreSQL, Redis
• Infrastructure — AWS, Kubernetes, Docker, Terraform
• Observability — Datadog, OpenTelemetry
• CI/CD — GitHub Actions, ArgoCD
• Version Control — Git / GitHub

What We Offer at Yuno

• Competitive Compensation
• Remote Work — you can work from everywhere
• Home Office Bonus — a one-time allowance to set up your ideal home office
• Work Equipment
• Stock Options
• Health Plan wherever you are
• Flexible Days Off
• Language, Professional, and Personal Growth courses

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed or wish to exercise your data protection rights, please contact us at ******.