{"id":2696684,"url":"https://alion.io/job/wsd-senior-software-engineer","title":"Senior Software Engineer","company":{"id":3086099,"name":"WSD","domain":"wsd.com","url":"https://alion.io/company/wsd-com","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"BambooHR","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":91000,"max_usd":174000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":125},"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Kafka","optional":false},{"name":"AWS","optional":false},{"name":"Datadog","optional":false},{"name":"Docker","optional":false},{"name":"ElasticSearch","optional":false},{"name":"Java","optional":false},{"name":"Keycloak","optional":false},{"name":"Kotlin","optional":false},{"name":"Kubernetes","optional":false},{"name":"Node JS","optional":false},{"name":"PostgreSQL","optional":false},{"name":"TypeScript","optional":false},{"name":"Backstage","optional":true},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-06-16T00:00:00Z","employer_posted_date":"2026-06-16","last_verified_at":"2026-10-16T22:56:42Z","board_verified":true,"closed_at":null,"days_open":122,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":122},"description":"About the Role\nWe are looking for a Senior Software Engineer-Platform Servicesto drive our core platform ecosystem. In this role, you will drive technical excellence across dual-stack (Node.js/TypeScriptand Java/Kotlin) distributed systems.\nJob Role\nOwn and operate platform services that include customer and developer portals and centralised document management plus other cross-cutting services\nLead architectural decisions across the platform\nMentor engineers and drive technical quality\nResponsibilities\nMaintain and evolve engineering standards, shared libraries, service templates, API/event specifications, and Kafka integration patterns\nOwn performance and reliability: distributed tracing, benchmarks, latency optimisation, incident response\nContinue Keycloak migration and identity infrastructure work\nLead development of developer portal and internal tooling\nRequired experience\n10+ years backend engineering with distributed systems at scale\nStrong in Node.js/TypeScript and Java/Kotlin\nKafka and event-driven architecture\nAWS, Kubernetes, Docker in production\nPostgres, Elasticsearch; observability tooling (Datadog, Elastic APM)\nFinancial services or other regulated/high-reliability environments\nDesirable\nIdentity/auth experience: Keycloak or similar, OAuth 2.0, OIDC, SAML\nZero-downtime migration experience\nDeveloper experience/platform tooling (Backstage, service templates, DORA metrics)\nTechnical leadership or product ownership of platform services\nIf you have the skills, experience and drive to excel in this challenging and rewarding role, we would love to hear from you. Apply today and take the next step in your career with us!\nWSD is an employer that values diversity. 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