{"id":3054961,"url":"https://alion.io/job/the-portfolio-group-principal-c-net-developer","title":"Principal C# .Net Developer","company":{"id":2630175,"name":"The Portfolio Group","domain":"theportfoliogroup.com","url":"https://alion.io/company/theportfoliogroup","size_band":"51-200","is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":{"grade":"B","score":75,"open_postings":197,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-26T05:57:25Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Manchester, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":80000,"max":80000,"currency":"GBP","period":"year","gross":null,"usd_annual":107086},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"Azure","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Playwright","optional":false}],"status":"live","first_seen_at":"2026-07-23T11:00:39Z","employer_posted_date":"2026-07-23","last_verified_at":"2026-10-22T07:41:48Z","board_verified":false,"closed_at":null,"days_open":95,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":94},"description":"Principal Backend Developer (C# / .NET)\nThe Opportunity\nThis is a career-defining role for a Principal Backend Developer who wants to be at the forefront of a growing SaaS organisation. You’ll be joining a company that’s scaling rapidly, building innovative products that make a real difference to its customers. This role offers the chance to take ownership of backend systems, shape best practice, and mentor the next generation of engineers.\nThe Role\nYou’ll provide technical leadership across backend development, ensuring systems are robust, scalable, and future-proof. Working closely with product owners, testers, and front-end teams, you’ll bring engineering excellence into every decision. With a stack centred on C#, .NET, cloud services, and automation frameworks, you’ll be both hands-on in coding and guiding others to deliver their best work.\nDay-to-day responsibilities\nArchitect and build scalable backend services in C# / .NET\nDrive adoption of clean coding practices, design patterns, and SOLID principles\nMentor engineers, fostering a culture of growth, learning, and high performance\nCollaborate with product owners to refine requirements and translate them into technical solutions\nIntegrate automation testing (Playwright) and CI/CD pipelines to ensure code quality\nLead technical discussions, setting direction on tools, frameworks, and approaches\nTroubleshoot and resolve complex technical challenges across backend services\nOptimise system performance and ensure resilience across platforms\nReview code and guide engineering standards across the team\nContribute to product strategy by aligning technical roadmaps with business goals\nWhat you bring to the team\nStrong experience developing backend systems with C# and .NET\nDeep knowledge of cloud environments (Azure preferred)\nExperience in designing APIs and microservices at scale\nSolid understanding of automation testing tools (Playwright desirable)\nLeadership experience - mentoring, coaching, and guiding engineering teams\nStrong problem-solving skills with an eye for performance optimisation\nEnthusiasm for delivering quality solutions in a SaaS environment\nSend your CV now \n50249MSR\nINDMANS\nThe Portfolio Group are acting on behalf of our client in recruiting for this position.","description_format":"text","description_chars":2263,"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":[],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-22T03:20:56Z"}],"visa":[],"liveness":{"score":4,"band":"cold","label":"Long shot","p_open":0.9,"p_active":0.176,"p_room":0.28,"age_days":94,"expected_fill_days":30,"reasons":["conf:94","agency","stale_co","urgency","velocity","win:tail","crowd:brand"],"computed_at":"2026-10-26T05:57:25Z"},"pay":{"stated_usd_annual":107086,"is_top_pay":false},"html_url":"https://alion.io/job/the-portfolio-group-principal-c-net-developer","json_url":"https://alion.io/job/the-portfolio-group-principal-c-net-developer.json","meta":{"generated_at":"2026-10-26T16:26:31Z","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":21908,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-27T00:00:00Z"}},"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":2630175},"rest":"https://alion.io/mcp/rest/get_company?id=2630175"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fthe-portfolio-group-principal-c-net-developer"},{"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%2Fthe-portfolio-group-principal-c-net-developer"},{"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%2Fthe-portfolio-group-principal-c-net-developer"},{"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/the-portfolio-group-principal-c-net-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fthe-portfolio-group-principal-c-net-developer"}]}