{"id":125210,"url":"https://alion.io/job/yuno-senior-web-developer","title":"Senior Web Developer","company":{"id":1872,"name":"Yuno","domain":"yuno.ai","url":"https://alion.io/company/yuno","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"A","score":98,"open_postings":12,"ghost_share":0,"stale_share":0.083,"repost_share":0,"time_to_fill_p50_days":59,"computed_at":"2026-10-16T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["Argentina","Brazil","Colombia","Poland","Spain","Ecuador","Portugal"],"countries":["AR","BR","PL","ES","EC","PT"],"hiring_countries":["AR","BR","PL","ES","EC","PT"],"hiring_countries_total":6,"salary":null,"salary_estimate":{"min_usd":59000,"max_usd":95000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":227},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"Agile","optional":false},{"name":"AI Agents","optional":false},{"name":"Amazon S3","optional":false},{"name":"AWS","optional":false},{"name":"CI/CD","optional":false},{"name":"Claude Code","optional":false},{"name":"Copilot","optional":false},{"name":"Cursor","optional":false},{"name":"Docker","optional":false},{"name":"Emotion","optional":false},{"name":"Git","optional":false},{"name":"JavaScript","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"Next.js","optional":false},{"name":"npm","optional":false},{"name":"React.js","optional":false},{"name":"Scrum","optional":false},{"name":"Storybook","optional":false},{"name":"TypeScript","optional":false},{"name":"Nest.JS","optional":true},{"name":"Node JS","optional":true}],"status":"live","first_seen_at":"2026-06-15T17:24:27Z","employer_posted_date":"2026-06-15","last_verified_at":"2026-10-16T08:06:36Z","board_verified":true,"closed_at":null,"days_open":122,"trust":{"level":"ok","repost_count":0,"flags":[],"days_open":122},"description":"Remote · Europe / Latam · Full Time · Individual Contributor · +5 Years of Experience\nSenior Web Developer\nWho We Are\nYuno 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.\nAbout The Role\nYuno is looking for a Senior Web Developer to build the SDK, design system, and web components that power how third parties integrate with our platform. You'll own the developer-facing surface of Yuno's single API - the reusable components and SDKs that merchants, banks, and partners embed into their own products across browsers, frameworks, and environments.\nThis is a role where developer experience is the product: the quality, performance, and consistency of what you ship directly shape how easily the world connects to Yuno.\nHow AI Shows Up in This Role\nAI is our default execution layer - you'll use AI-assisted tools like Claude Code, Cursor, and GitHub Copilot, and LLMs more broadly, across design, implementation, debugging, testing, documentation, and code review as standard practice, not novelty\nYou'll help shape how the engineering team works with AI, building workflows with AI agents and MCP servers and defining AI-driven development practices that raise the whole team's leverage\nThe SDKs and components you build are the developer-facing edge of an AI-native payments platform whose agents learn from every transaction on the network\nYour Contribution Will Be\nSDK and design system - create the design system and web components used across third-party applications, ensuring SDK compatibility across browsers, frameworks, and integration environments\nCross-platform consistency - collaborate with backend and mobile teams so the SDK behaves consistently across every platform and integration\nPerformance and build optimization - design low-latency, high-availability applications and optimize bundle size, tree-shaking, and build performance for SDK distribution\nFull-stack integration - connect user-facing elements with server-side logic and integrate data storage solutions into cohesive, reliable systems\nCode quality and security - write reusable, testable, and efficient code, and implement security and data protection throughout\nDeveloper experience and releases - maintain high-quality documentation and DX for integrators, and design automated pipelines for publishing and versioning SDK releases\nWhat Success Looks Like\nWithin your first 6-12 months, you've shipped SDK components adopted by external integrators, raised the bar on developer experience and documentation, and own the pipeline that publishes and versions Yuno's web SDKs.\nSkills You Need\nMinimum Qualifications\n5+ years building production applications with React, with strong JavaScript and TypeScript\nSolid command of the modern web stack - Node, CSS, Next.js, Storybook, and Emotion\nEngineering fundamentals - OOP, Git, unit and E2E testing, and CI/CD\nBuild and packaging tooling (NPM / yarn), with an eye for bundle size and performance\nAWS (S3, Amplify) and Docker\nAI-assisted development - fluent use of tools like Claude Code, Cursor, or GitHub Copilot, and leveraging LLMs across design, implementation, debugging, testing, documentation, and code reviews\nAutonomy and agile delivery - you own tasks end to end and work comfortably in SCRUM\nEnglish - advanced proficiency, written and spoken\nPreferred Qualifications\nExperience in the payments industry and integrating Payment Service Providers (PSPs)\nBackend experience (e.g., NestJS) and familiarity with backend languages\nBuilding custom workflows with AI agents, MCP servers, development assistants, or engineering automation platforms\nNice to Have\nExperience defining AI-driven development practices within an engineering team\nSpanish proficiency\nWhat We Offer at Yuno\nCompetitive Compensation\nRemote Work - you can work from everywhere\nHome Office Bonus - a one-time allowance to set up your ideal home office\nWork Equipment\nStock Options\nHealth Plan wherever you are\nFlexible Days Off\nLanguage, Professional, and Personal Growth courses","description_format":"text","description_chars":4560,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"Advanced (C1)","optional":false},{"language":"Spanish","level":"Advanced (C1)","optional":true}]},"benefits":["Home office","Stock options"],"hiring_locations":[{"name":"Argentina","iso":"AR","kind":"country"},{"name":"Brazil","iso":"BR","kind":"country"},{"name":"Colombia","iso":null,"kind":"country"},{"name":"Poland","iso":"PL","kind":"country"},{"name":"Spain","iso":"ES","kind":"country"},{"name":"Ecuador","iso":"EC","kind":"country"},{"name":"Portugal","iso":"PT","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["EdTech Platforms","E-learning","Education AI"],"lifecycle":[{"event":"open","at":"2026-06-15T17:24:27Z"}],"visa":[],"liveness":{"score":21,"band":"cold","label":"Long shot","p_open":1,"p_active":0.762,"p_room":0.28,"age_days":122,"expected_fill_days":59,"reasons":["conf:2","velocity","win:tail","crowd:"],"computed_at":"2026-10-16T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/yuno-senior-web-developer","json_url":"https://alion.io/job/yuno-senior-web-developer.json","meta":{"generated_at":"2026-10-16T09:20:55Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":7473,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-17T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":1872},"rest":"https://alion.io/mcp/rest/get_company?id=1872"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fyuno-senior-web-developer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fyuno-senior-web-developer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fyuno-senior-web-developer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/yuno-senior-web-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fyuno-senior-web-developer"}]}