Find open senior backend engineering roles at technology companies in Europe, including remote-EU roles. Each finding must be ONE job posting for ONE role, hosted either on the employer's own careers domain or on an applicant tracking system. Accept job-boards.greenhouse.io, boards.greenhouse.io, jobs.lever.co, jobs.ashbyhq.com, myworkdayjobs.com, smartrecruiters.com, apply.workable.com, jobs.jobvite.com, careers.icims.com, darwinbox.in, keka.com, zohorecruit.com, or a company's own /careers/, /jobs/ or /join/ path that carries a role identifier in the URL. MUST-HAVES, every one of them checkable from the posting itself: the role is based in Germany, the Netherlands, Ireland, Spain, Portugal, Poland, Switzerland, Sweden, Denmark, Norway or Finland, or is explicitly remote within it; the title is Senior Software Engineer, Senior Backend Engineer, Senior Platform Engineer or Lead Engineer, OR the requirements ask for 5 or more years of backend experience; The posting must still be open. Reject anything showing 'closed', 'filled', 'position no longer available', 'no longer accepting applications', or a deadline that has passed. The posting must have been published or last updated within the last 21 days. If the page carries no date at all, say so in the summary and rank it below an otherwise identical dated posting rather than assuming it is fresh. State any LANGUAGE requirement explicitly, including 'English only', because for a non-EU applicant that is more often the real filter than the engineering bar. Also state whether the posting mentions visa sponsorship, EU Blue Card support or relocation assistance, but do NOT require it: most postings are silent on it and demanding it rejects nearly everything. The following RAISE the value of a finding and are NOT requirements: a published compensation band, a named tech stack, the team size, the reporting line, and whether the role is onsite, hybrid or remote. Say which of them are present. Never reject a posting for omitting them: most postings omit compensation, and treating that as disqualifying rejects almost everything. DO NOT SEND: junior, graduate or mid-level roles; engineering-manager or director roles; or frontend, mobile and QA roles. REJECT these domains outright, they are never the employer: naukri.com, instahyre.com, foundit.in, monsterindia.com, hirist.tech, cutshort.io, glassdoor, indeed, ziprecruiter, simplyhired, jooble, talent.com, adzuna, reed.co.uk, totaljobs, cv-library, stepstone, xing, jobs-radar.com, itreferraljobs.in, educativ.net, digitalxnode.com, and any page whose title reads 'ROLE at COMPANY | SITENAME'. Also skip search and category pages (any URL carrying q=, query=, keyword=, search=, page= or offset=, or a path ending at /jobs, /careers, /vacancies or /openings with no role identifier), recruiter and staffing agency pages, LinkedIn profiles of people who already hold the role, 'we are hiring' social posts, salary guides, interview-prep articles, and course or bootcamp adverts. Lead with the company, the country and city, the language requirement, and whether relocation or sponsorship is mentioned.