{"id":3542850,"url":"https://alion.io/job/it-search-principal-software-engineer","title":"Principal Software Engineer","company":{"id":693439,"name":"IT Search","domain":"itsearch.ie","url":"https://alion.io/company/itsearch","size_band":null,"is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":"Schema","truth_index":{"grade":"A","score":100,"open_postings":14,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":45,"computed_at":"2026-10-30T05:48:23Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["Ireland"],"countries":["IE"],"hiring_countries":["GB","IE"],"hiring_countries_total":2,"salary":null,"salary_estimate":{"min_usd":76000,"max_usd":149000,"period":"year","method":"role_seniority_country_cell","sample_n":14},"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"C#","optional":false},{"name":"SQL","optional":false},{"name":"Azure","optional":true},{"name":"Azure DevOps","optional":true},{"name":"Redis","optional":true}],"status":"live","first_seen_at":"2026-10-30T19:49:11Z","employer_posted_date":"2026-10-30","last_verified_at":"2026-10-31T00:56:34Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Job Details\nExperience: 10+ Years\nSector: \nclass=\"tax-link tax-link--last\">\n.NET Developer\nPrincipal Software Engineer\nFully Remote | Ireland or UK\nHighly competitive salary package with an excellent benefits offering.\nI’m working with an established software business looking for a Principal Software Engineer to shape the technical direction of a mature, business-critical software platform.\nThis is a hands-on engineering role focused on software architecture, complex problem-solving and performance optimisation. You’ll influence key technical decisions, drive improvements across the platform and mentor developers, without formal people-management responsibilities.\nTechnical Requirements\nExtensive experience with C#, .NET Framework and/or .NET Core.\nStrong knowledge of software architecture, design patterns and scalable, maintainable enterprise applications.\nAdvanced SQL Server experience within database-driven systems.\nExpertise in performance profiling, debugging, optimisation and resolving complex technical challenges.\nExperience developing across desktop and web applications within established software products.\nProven ability to influence architectural decisions, lead complex development initiatives and mentor engineers.\nInterest in AI tools and emerging technologies, with experience applying them to improve development workflows or engineering practices.\nDesirable: DevExpress and WinForms experience, alongside exposure to Redis, MongoDB and Azure DevOps.\nIf this sounds like your next move, apply via the link or contact Graeme King at IT Search for a confidential chat.\nApply Now\nConsultant detail\n\ntype=\"image/webp\">\nclass=\"team-card-job__img\" width=\"300\" height=\"300\">\n\nGraeme King\nPrincipal Consultant\nteam-card-job__col--line\">\n\nclass=\"team-card-job__link\">\n+353 87 499 8421\n\nclass=\"team-card-job__link\">\n\n\nConnect with Linkedin","description_format":"text","description_chars":1885,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"},{"name":"Ireland","iso":"IE","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-30T19:49:11Z"}],"visa":[],"liveness":{"score":52,"band":"ok","label":"Likely open","p_open":1,"p_active":0.516,"p_room":1,"age_days":0,"expected_fill_days":45,"reasons":["conf:3","agency","win:early"],"computed_at":"2026-10-31T04:55:08Z"},"pay":null,"html_url":"https://alion.io/job/it-search-principal-software-engineer","json_url":"https://alion.io/job/it-search-principal-software-engineer.json","meta":{"generated_at":"2026-10-31T04:55:08Z","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":6897,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-01T00:00:00Z"}},"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":693439},"rest":"https://alion.io/mcp/rest/get_company?id=693439"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fit-search-principal-software-engineer"},{"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%2Fit-search-principal-software-engineer"},{"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%2Fit-search-principal-software-engineer"},{"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/it-search-principal-software-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fit-search-principal-software-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3542850}},{"tool":"search_jobs","arguments":{"company":"itsearch.ie","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3542850},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); 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