{"id":3870039,"url":"https://alion.io/job/cognizant-full-stack-engineer-kotlin-gcp-payments-connectivity","title":"Full Stack Engineer (Kotlin / GCP), Payments Connectivity","company":{"id":85,"name":"Cognizant","domain":"cognizant.com","url":"https://alion.io/company/cognizant","size_band":"5000+","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"Cognizant Careers","truth_index":{"grade":"A","score":88,"open_postings":200,"ghost_share":0,"stale_share":0.455,"repost_share":0.06,"time_to_fill_p50_days":24,"computed_at":"2026-11-12T10:38:37Z"}},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Madrid, Spain"],"countries":["ES"],"hiring_countries":["ES"],"hiring_countries_total":1,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"API Gateway","optional":false},{"name":"CI/CD","optional":false},{"name":"GCP","optional":false},{"name":"GitHub Actions","optional":false},{"name":"Java","optional":false},{"name":"Kotlin","optional":false},{"name":"Micronaut","optional":false},{"name":"Rest API","optional":false},{"name":"Spring Boot","optional":false},{"name":"Terraform","optional":false},{"name":"Dynatrace","optional":true},{"name":"Grafana","optional":true},{"name":"JavaScript","optional":true},{"name":"PCI DSS","optional":true},{"name":"Prometheus","optional":true},{"name":"React.js","optional":true},{"name":"Splunk","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-11-06T04:12:25Z","employer_posted_date":"2026-11-06","last_verified_at":"2026-11-12T12:34:32Z","board_verified":true,"closed_at":null,"days_open":6,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":6},"description":"About the Role\nYou will join a team that builds and runs payment connectivity services integrating a large-scale online payments platform with external payment service providers. You will own features end to end across backend services, serverless components, cloud infrastructure, and CI/CD, and contribute to the customer-facing payment flows.\nWhat You’ll Do\nDesign, build, and maintain backend services that integrate with payment service providers for payment initiation and status retrieval.\nDevelop and support webhook and callback handlers that process asynchronous payment events reliably and securely.\nImplement secure data exchange, including payload encryption and decryption and managed secrets.\nDefine and maintain well-documented APIs that follow internal standards and are validated through automated checks.\nSecure inbound and outbound traffic using API gateway, edge, and cloud security controls.\nManage cloud infrastructure as code and deploy services on a serverless, container-based platform.\nBuild and improve CI/CD pipelines covering testing, validation, release automation, and deployment.\nSupport production through monitoring, incident triage, root-cause analysis, and payment status reconciliation.\nContribute to platform and edge improvements and to technical documentation.\nCollaborate with platform teams and external provider contacts.\nRequired Skills\nStrong backend experience in Kotlin (or Java with a readiness to work in Kotlin) and a modern framework such as Micronaut or Spring Boot.\nHands-on experience with Google Cloud Platform (serverless compute, messaging, load balancing, security, secret management).\nExperience designing and consuming REST APIs and OpenAPI specifications, and working with API gateways.\nSolid understanding of webhook and callback patterns, idempotency, retries, and failure handling.\nWorking knowledge of encryption and secure data exchange.\nInfrastructure as Code with Terraform.\n CI/CD with GitHub Actions or an equivalent tool.\nStrong testing discipline (unit, integration, contract) and observability practices.\nNice to Have\nExperience in payments or fintech, including PSP integrations, reconciliation, and PCI-DSS awareness.\nKnowledge of CDN and edge security (WAF, routing, security rules).\nFrontend skills (TypeScript, React or similar) for payment, redirect, or status-handling flows and internal tooling.\nFamiliarity with regional payment methods and regulatory guidelines.\nExperience with event-driven architectures and microservices.\nExperience with monitoring tools such as Dynatrace, Splunk, Prometheus, or Grafana.","description_format":"text","description_chars":2592,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"Spain","iso":"ES","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Consulting & Digital Transformation","IT Outsourcing & Dedicated Teams","Engineering Services","Cloud Consulting & 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