{"id":745125,"url":"https://alion.io/job/interactive-senior-full-stack-developer","title":"Senior Full-Stack Developer","company":{"id":691410,"name":"InteractiveAI","domain":"interactive.ai","url":"https://alion.io/company/interactive-5","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Personio","truth_index":{"grade":"B","score":75,"open_postings":4,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-01T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Madrid, Spain"],"countries":["ES"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":70000,"max":90000,"currency":"EUR","period":"year","gross":null,"usd_annual":104826},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"CI/CD","optional":false},{"name":"ClickHouse","optional":false},{"name":"Docker","optional":false},{"name":"GCP","optional":false},{"name":"GraphQL","optional":false},{"name":"JavaScript","optional":false},{"name":"Kubernetes","optional":false},{"name":"Node JS","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Python","optional":false},{"name":"React.js","optional":false},{"name":"Redis","optional":false},{"name":"Tailwind CSS","optional":false},{"name":"Terraform","optional":false},{"name":"TypeScript","optional":false},{"name":"IAM","optional":true},{"name":"Recoil","optional":true},{"name":"Redux","optional":true},{"name":"State Management","optional":true},{"name":"Zustand","optional":true}],"status":"live","first_seen_at":"2025-11-20T23:29:33Z","employer_posted_date":"2025-11-20","last_verified_at":"2026-10-01T04:23:17Z","board_verified":true,"closed_at":null,"days_open":315,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":314},"description":"What You’ll Do\nAs a Senior Full-Stack Developer at InteractiveAI, you will build core features across both the frontend and backend of our platform-shipping elegant interfaces, robust APIs, scalable services, and reliable tooling used by enterprise customers and internal teams.This is a hands-on, high-ownership engineering role: you will architect systems, write production-grade code, design efficient data flows, and ship end-to-end features that directly shape our product experience.\nDesign, architect, and implement backend services, microservices, and internal tooling\nBuild modern, responsive, and performant frontend applications using React, TypeScript, and Tailwind\nDevelop and maintain RESTful and GraphQL APIs that power key platform functionalities\nIntegrate third-party services, authentication systems, and enterprise connectors\nCollaborate with product and design to craft intuitive user experiences and smooth interaction flows\nDeploy and manage containerized applications using Docker and Kubernetes\nWork with databases such as Postgres, Redis, and/or ClickHouse-handling schema design, migrations, and query performance\nImplement and maintain CI/CD pipelines, testing frameworks, and release workflows\nTroubleshoot production issues, performance problems, and service reliability incidents\nTake full ownership of features from design to production, including documentation and monitoring\nWhat We’re Looking For\nWe’re looking for a highly skilled engineer with strong full-stack fundamentals, proven delivery, and the ability to build elegant, scalable systems across the entire web stack.Minimum Requirements:\n5+ years experience building and deploying full-stack applications in production\nStrong proficiency with TypeScript, JavaScript, and modern frontend frameworks (React required)\nBackend experience with Node.js, Python, or similar server-side technologies\nExperience designing and consuming RESTful and GraphQL APIs\nHands-on experience with Docker, containers, and Kubernetes deployments\nStrong understanding of relational and/or analytical databases (Postgres, Redis, ClickHouse)\nExperience working with cloud providers (AWS, GCP, or Azure)\nFamiliarity with Infrastructure as Code tools such as Terraform\nSolid grasp of CI/CD pipelines, automated testing, and release management\nExcellent communication skills and ability to collaborate in cross-functional teams\n Nice-to-Haves:Experience with multi-tenant SaaS architectures or high-throughput systems\nExperience with state management libraries (Zustand, Redux, Recoil)\nFamiliarity with event-driven architectures and message queues\nExposure to enterprise security best practices (IAM, VPC, encryption)\nContributions to open-source or active involvement in tech communities\nWhat You’ll Get\nCompetitive base salary (€70,000/yr to €90,000/yr) + performance bonuses\nAccess to equity/share plan as it rolls out\nPrivate health insurance\nFlexible work setup + travel when needed (ideally Hybrid in Lisbon or Madrid)\n23 days PTO (excluding local public holidays)\nWho You Are\nProactive & Resourceful: You identify problems early and drive solutions independently.\nHigh-Ownership: You treat the platform and codebase as your own and deliver high-quality work consistently.\nExecution-Driven: You thrive in a fast-paced startup environment and enjoy shipping user-facing features.\nCollaborative: You communicate clearly, engage well with product/design/engineering peers, and mentor others when needed.\nInterview Process\nWe keep our process focused and respectful of your time. Most candidates complete it in 2-3 weeks. Here’s what to expect:Intro Call - 30 minutes to align on fit and expectations\nTake-Home Challenge - A practical task based on real-world engineering problems\nTechnical Interview - Deep dive into software architecture, system design, and implementation skills\nCultural and Values Interview - Exploration of motivation, communication style, and team alignment\nOffer - Final conversation and offer\nWe’re forming a team of builders - people who care about impact, quality, and growth. If that’s you, let’s talk - ","description_format":"text","description_chars":4122,"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":[]},"benefits":["Equity","Flexible schedule","Health insurance"],"hiring_locations":[{"name":"Spain","iso":"ES","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-09-11T13:56:48Z"},{"event":"open","at":"2026-09-29T15:02:10Z"}],"liveness":{"score":6,"band":"cold","label":"Long shot","p_open":1,"p_active":0.217,"p_room":0.28,"age_days":314,"expected_fill_days":30,"reasons":["conf:1","win:tail","crowd:"],"computed_at":"2026-10-01T05:45:00Z"},"pay":{"stated_usd_annual":104826,"is_top_pay":false},"html_url":"https://alion.io/job/interactive-senior-full-stack-developer","json_url":"https://alion.io/job/interactive-senior-full-stack-developer.json","meta":{"generated_at":"2026-10-02T02:26:16Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":3247,"day_limit":5000,"remaining_today":1753,"minute_limit":60,"resets_at":"2026-10-03T00:00:00Z"}}}