Remote · Full Time · Individual Contributor · +8 Years of ExperienceRemote · Full Time · Individual Contributor · +8 Years of ExperienceStaff Engineer, Trust & VaultWho We AreYuno 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 RoleYuno is looking for a Staff Engineer to be the senior technical leader for Trust & Vault — the domain that secures card data and optimizes how it's used across every transaction on the platform. You'll architect the foundational systems behind PCI-compliant card vaulting and tokenization, card authentication (3DS, network tokenization), and the optimization capabilities that lift authorization and acceptance rates, and raise the technical bar for the pod that builds them.This is a hands-on leadership role in a zero-tolerance-for-failure environment. You'll design and build bank-grade, resilient capabilities, champion a "You Build It, You Run It" culture where your team owns its services from code to production, and turn the hardest problems in card-data security and payment optimization into elegant, maintainable architecture.What This Domain OwnsCard vaulting & tokenization — tokenize, store, and retrieve raw card data within the PCI boundaryAuthentication — 3DS / SCA and network tokenization to authenticate cardholders and strengthen every transactionPayment optimization — lift authorization and acceptance rates through network tokens, account updater, and intelligent use of vaulted dataAccount updater & portfolio migration — keep stored card credentials current to reduce declines, and migrate card portfolios between vaults and processorsHow AI Shows Up in This RoleThe tokenization, authentication, and vaulting layer you own is foundational infrastructure for an AI-native platform — the secure card-data foundation every transaction, including agent-driven flows, depends onAI is our default execution layer: you're expected to use AI-assisted tooling fluently across design, implementation, testing, and review,



and to shape how the domain adopts itYour Contribution Will BeDomain architecture and technical leadership — own the architecture of Trust & Vault across vaulting, authentication, optimization, account updater, and portfolio migration; set the technical direction with versioned APIs and event-driven design, and raise the bar for the podCard-data security and vaulting — architect the systems that tokenize, store, and retrieve raw card data within the PCI boundary, safely and at scaleAuthentication — build and evolve authentication capabilities (3DS/SCA, network tokenization) that strengthen transactions without adding frictionPayment optimization — design capabilities that lift authorization and acceptance rates — network tokens, account updater, and smart use of vaulted data — turning secure card data into better payment outcomesBank-grade, resilient systems — design headless, PCI-compliant capabilities engineered for a zero-tolerance-for-failure environment, where feature velocity never compromises reliability or complianceYou Build It, You Run It — champion a YBIYRI culture: your team designs for multi-tenancy, elastic scaling, and automated observability, and owns its microservices in productionMentorship and cross-functional collaboration — mentor engineers and partner with Product, the CTO Office, and Staff Engineers across domains to eliminate silos and deliver complex, cross-team workWhat Success Looks LikeWithin your first 6–12 months, you've led the architecture of at least one core Trust & Vault capability (vaulting, authentication, or optimization), your pod owns its services in production under a YBIYRI model, and you're the technical voice Yuno trusts on card-data security, authentication, and PCI-compliant design.Skills You NeedMinimum QualificationsExtensive software engineering experience, with deep expertise in Go and/or Kotlin (our core backend stack) and strength across the full stackA proven track record architecting robust, scalable, and maintainable distributed systems — event-driven platforms, APIs (gRPC/REST), and cloud-native or serverless architectures — with a strong grasp of design patterns and best practicesExperience building foundational platform capabilities or complex distributed systems,



ideally involving tokenization, card vaulting, authentication (3DS / network tokenization), or PCI-scoped infrastructureStrong 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 workflowsProven technical leadership — mentoring engineers, driving technical vision, and delivering complex, cross-team projects, with a feel for DORA metrics and unblocking teamsA preference for clean, modular architecture over monolithic shortcuts, and the judgment to balance reliability and compliance against feature velocityEnglish — advanced proficiency, written and spokenPreferred QualificationsDomain expertise — PCI DSS card vaulting, tokenization and network tokenization standards, 3DS/SCA authentication, or account updater services from card networksPayment optimization — improving authorization and acceptance rates through tokenization, authentication, or credential lifecycleExperience in the payments or fintech industry, operating at global scalePerformance optimization and efficient algorithms for high-throughput, low-latency systemsStatic analysis and code-quality tooling (e.G., SonarQube) and mature CI/CD pipelinesNice to HaveA track record of introducing new engineering practices or standards across multiple teamsOpen-source contributions or technical writing that raised the bar for othersSpanish proficiencyTech StackLanguages — Go and Kotlin (core), JavaAPIs — gRPC, RESTFrameworks — Spring Boot, Spring WebFlux; Go standard libraryMessaging — Apache Kafka, SQSDatabases — PostgreSQL, RedisInfrastructure — AWS, Kubernetes, Docker, TerraformObservability — Datadog, OpenTelemetryCI/CD — GitHub Actions, ArgoCDVersion Control — Git / GitHubWhat We Offer at YunoCompetitive CompensationRemote Work — you can work from everywhereHome Office Bonus — a one-time allowance to set up your idóneo home officeWork EquipmentStock OptionsHealth Plan wherever you areFlexible Days OffLanguage, Professional, and Personal Growth coursesWe 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 [email protected].#J-18808-Ljbffr

📌 Staff Engineer - Trust & Vault (Málaga)
🏢 Yuno
📍 Málaga