{"id":35887,"url":"https://alion.io/job/xapien-senior-backend-engineer","title":"Senior Backend Engineer","company":{"id":8279,"name":"Xapien","domain":"xapien.com","url":"https://alion.io/company/xapien","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":95,"open_postings":13,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":96,"computed_at":"2026-10-16T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","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":{"min":80000,"max":130000,"currency":"GBP","period":"year","gross":null,"usd_annual":172055},"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Docker","optional":false},{"name":"Go","optional":false},{"name":"Grafana","optional":false},{"name":"gRPC","optional":false},{"name":"Kubernetes","optional":false},{"name":"LLM","optional":false},{"name":"Apache Kafka","optional":true},{"name":"Edge AI","optional":true},{"name":"ElasticSearch","optional":true},{"name":"GCP","optional":true},{"name":"Gemini","optional":true},{"name":"OpenAI","optional":true},{"name":"Prometheus","optional":true},{"name":"RAG","optional":true},{"name":"Rest API","optional":true},{"name":"Temporal","optional":true}],"status":"live","first_seen_at":"2026-03-26T15:28:09Z","employer_posted_date":"2026-03-26","last_verified_at":"2026-10-17T02:02:28Z","board_verified":true,"closed_at":null,"days_open":204,"trust":{"level":"ok","repost_count":1,"flags":["company_stale"],"days_open":203},"description":"About Us\nEvery business needs to know who they’re really working with whether it’s suppliers, investors, partners, or third parties. At Xapien, we’re reinventing how organisations do that, combining speed, scale and accuracy with cutting-edge AI.\nSince 2018, we’ve grown from a deep-tech startup to a global player in AI-driven due diligence and risk intelligence. 2024 was a landmark year as we closed a $10M Series A, earned recognition in the Chartis RiskTech100® and Everest Group’s Leading 50™, and expanded our products, markets and customer base.\n2025 was even bigger: With new regulations, rising compliance pressure and growing reputation risks, organisations everywhere are demanding smarter, faster ways to work and they’re turning to us. Customers worldwide from global law firms and private banks to universities and nonprofits rely on Xapien to turn days of manual research into trusted insights, delivered in minutes.\nOur momentum so far\nCustomers in a diverse range of industries, with particular growth in wealth management, financial services and supply chain onboarding.\nDemand accelerating beyond our UK headquarters, across multiple continents with new customers in the Middle East, Asia, and Oceania.\nWhy this is an exciting time to join\nThis isn’t just another job role; it’s an opportunity to shape the future of the due diligence industry with a market-leading product trusted by global organisations. Whether you’re in marketing, communications, sales, or finance, you’ll play a critical role in driving growth, building credibility, and defining how we connect our product to a rapidly evolving market.\nWe’re scaling fast with more customers, more releases, and bigger regulatory and market challenges. Expectations are rising, due diligence now means real-time insight, delivered efficiently and with impact. You won’t just be executing campaigns, closing deals, or managing numbers, you’ll be influencing strategy, optimising processes, and helping position a brand that’s setting the new standard for trust and transparency.\nFor people who love learning, innovating, and making an impact that matters now is the moment to be a part of Xapien.\nThe Role\nWe're hiring a Staff Backend Engineer to join our engineering team in a high-impact technical leadership role. You'll work on our most challenging technical problems, own parts of our platform’s architecture, and help shape the technical direction of our backend stack.\nOur tech stack center’s on Go microservices, with Temporal workflows, MongoDB and ElasticSearch running on Kubernetes in GCP. You'll work with modern patterns including event-driven architectures, gRPC and REST APIs, and comprehensive observability with Grafana Cloud.\nYou'll take technical ownership of major domains within our platform - whether that's our Investigations pipeline (web scraping, data provider integrations, LLM-powered analysis) or our Core App systems (user journeys, features, and configuration). You'll be a technical authority, establishing patterns that others follow and driving initiatives that span multiple teams.\nWhat You'll Do\nOwn the technical direction and architecture for parts of our platform\n\nDesign and build complex backend services and systems that scale\n\nDrive technical decisions that affect multiple teams\n\nEstablish patterns, standards, and best practices that others will follow\n\nLead complex technical initiatives from design through implementation\n\nIdentify and address systemic technical challenges across our backend\n\nWrite exemplary Go code that sets the standard for quality and design\n\nMentor engineers across the organization, raising the technical bar\n\nBalance technical excellence with pragmatic delivery\n\nInfluence technology choices and architectural direction\n\nCollaborate with engineering leadership on technical strategy\n\nBuild new systems and features while improving our existing architecture\n\nWhat We're Looking For\nEssential\n10+ years of professional software engineering experience\n\nDeep expertise in Go, with mastery of concurrency, performance optimization, and advanced patterns\n\nProven track record of designing and owning large-scale systems\n\nStrong experience with distributed systems, event-driven architectures, or similar complex systems\n\nDeep understanding of databases, particularly MongoDB or similar NoSQL systems\n\nExtensive experience with microservices architecture and inter-service communication\n\nExpert-level understanding of containerization (Docker) and orchestration (Kubernetes)\n\nExperience establishing technical standards and patterns across teams\n\nStrong architectural thinking with ability to balance trade-offs\n\nTrack record of mentoring and developing other engineers\n\nAbility to drive technical initiatives with minimal guidance\n\nExperience influencing technical direction at an organizational level\n\nExcellent communication skills with ability to articulate complex technical concepts\n\nHighly Desirable\nExperience with Temporal or similar workflow orchestration systems at scale\n\nDeep knowledge of event streaming platforms like Kafka\n\nExperience with LLMs and AI integration (particularly for Investigations team)\n\nBackground in SaaS platforms or B2B products at scale\n\nExpert-level knowledge of observability tools (Grafana, Prometheus, etc.)\n\nDeep understanding of authorization patterns, security, and multi-tenancy\n\nExperience with protobuf and gRPC\n\nOur Tech Stack\nLanguages: Go\n\nDatabases: MongoDB\n\nMessaging & Orchestration: Temporal, Kafka\n\nAPIs: REST, gRPC, protobuf\n\nInfrastructure: Kubernetes, GCP\n\nObservability: Grafana stack\n\nAI: LLMs (OpenAI, Gemini), RAG systems\n\nWhat Success Looks Like\nIn your first 6 months, you will have:\nOwned and driven a significant technical initiative to completion\n\nEstablished new patterns or improved existing ones across teams\n\nMentored multiple engineers, visibly raising technical standards\n\nContributed to architectural decisions\n\nBeen recognized as a technical authority in your domain\n\nMade measurable improvements to system reliability, performance, or scalability\n\nInfluenced the technical direction of our backend platform\n\nHere’s our promise to you:\nWe are going to work with you - to build a rewarding and fulfilling career with the opportunities, challenges and resources you need to do you your best work.\n\nWe succeed together- you will own a meaningful part of the business through our employee shares & equity programme.\n\nPrivate health insurance to keep you in tip-top condition.\n\nLife Insurance - let's hope nobody ever needs this!\n\nUnlimited holidays - yes, it really is uncapped - take the time you need, when you need it.\n\nEveryone is learning, developing and challenging themselves so we have a £1k professional development fund per year if you want to learn new skills, even new things outside of work.\n\nMost importantly of all, we will work with you, to help you realise your fullest potential, always.","description_format":"text","description_chars":6918,"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":["Equity","Health insurance","Life insurance","Professional development"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Natural Language Processing","RegTech, AML & Compliance"],"lifecycle":[{"event":"open","at":"2026-03-26T15:28:09Z"},{"event":"close","at":"2026-08-13T11:26:59Z"},{"event":"reopen","at":"2026-08-29T22:47:03Z"},{"event":"open","at":"2026-09-26T00:16:46Z"}],"visa":[],"liveness":{"score":18,"band":"cold","label":"Long shot","p_open":1,"p_active":0.66,"p_room":0.28,"age_days":203,"expected_fill_days":96,"reasons":["conf:1","win:tail","crowd:"],"computed_at":"2026-10-16T05:45:00Z"},"pay":{"stated_usd_annual":172055,"is_top_pay":false},"html_url":"https://alion.io/job/xapien-senior-backend-engineer","json_url":"https://alion.io/job/xapien-senior-backend-engineer.json","meta":{"generated_at":"2026-10-17T03:53:12Z","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":5088,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"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":8279},"rest":"https://alion.io/mcp/rest/get_company?id=8279"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fxapien-senior-backend-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%2Fxapien-senior-backend-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%2Fxapien-senior-backend-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/xapien-senior-backend-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fxapien-senior-backend-engineer"}]}