{"id":3004124,"url":"https://alion.io/job/green-castle-digital-principal-solution-architect","title":"Principal Solution Architect","company":{"id":4457459,"name":"Green Castle Digital","domain":"greencastledigital.com","url":"https://alion.io/company/green-castle-digital","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Teamtailor","truth_index":{"grade":"B","score":75,"open_postings":3,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-28T05:59:10Z"}},"role":"Solutions","role_family":"Solutions","seniority":"lead","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Belgrade, Serbia"],"countries":["RS"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":48000,"max_usd":116000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":955},"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"Amazon ECS","optional":false},{"name":"Ansible","optional":false},{"name":"Apache Kafka","optional":false},{"name":"AWS","optional":false},{"name":"Blue-Green Deployment","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"GDPR","optional":false},{"name":"Kubernetes","optional":false},{"name":"PWA","optional":false},{"name":"React.js","optional":false},{"name":"Terraform","optional":false},{"name":"C#","optional":true},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-07-21T11:27:24Z","employer_posted_date":"2026-07-21","last_verified_at":"2026-10-28T22:58:09Z","board_verified":true,"closed_at":null,"days_open":99,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":98},"description":"Job title Principal Solution Architect\nFunction/Dept Engineering\nReporting To Chief Product & Technology Officer\nLocation Belgrade (Hybrid 3 days on-site)\nRole type Full time, perm\nWhy This Role\nWe are in the middle of a once-in-a-platform transformation: migrating to AWS, re-architecting the sportsbook front end, and surgically breaking down our Oracle monolith into event-driven microservices - all while running a high-volume, always-on sportsbook. This is high-stakes, complex work, and the business needs a senior architect who has genuinely done it before to plan and execute it.\nThis is a senior role for an established architect, not a step-up or development position. We are looking for someone who is already a practising architect at a recognised sportsbook (casino experience also valued) and who understands, first-hand, the logic and scale that sit behind a betting platform. You will own the end-to-end architecture of our most critical initiatives and be hands-on in making them real.\nRole Purpose\nAs Principal Solution Architect you will provide senior architectural leadership across the BoyleSports platform, with sportsbook as your core specialism. You will translate our platform strategy into concrete, executable designs, set the technical direction for the transformation programmes, and work shoulder-to-shoulder with engineering squads to deliver them - not just on paper, but in production.\nYou will partner closely with the Head of Engineering Delivery (who owns delivery coordination), the Director of Product (roadmap) and the CPTO (strategy), acting as the senior technical authority who de-risks the hardest problems and keeps our architecture coherent as it evolves.\nKey Responsibilities\nOwn and execute the transformation architecture\nAWS migration (application architecture). Own the application and workload architecture for our move to AWS - how latency-sensitive, high-availability sportsbook services are designed, decomposed and migrated - working in close partnership with our dedicated Cloud & Digital Infrastructure team, who lead on the underlying cloud platform (landing zones, networking, security and cost). This role complements that team rather than replacing it.\n\nSportsbook front-end re-architecture. Own the target architecture for the new sportsbook front end (app-shell and micro-frontend model, SPA/PWA, React), ensuring performance, SEO and a first-class mobile experience under peak load.\n\nBreaking down the monolith. Plan and drive the surgical decomposition of the Oracle monolith into event-driven microservices - identifying seams, defining domain and service boundaries, sequencing strangler-pattern extractions, and managing data migration without disrupting live trading.\n\nPlan and execute. Take initiatives from strategy through solution design to delivery: produce the designs, prove them with prototypes and PoCs, embed with squads, and remain accountable for the outcome in production.\n\nSportsbook domain leadership\nCore betting logic. Bring deep, hands-on understanding of the sportsbook engine: odds and price ingestion, market and event modelling, bet placement and validation, liability and risk/trading management, cash-out, and the settlement pipeline.\n\nScale and latency. Architect for the throughput, low latency and resilience demanded by live/in-play betting and major sporting and racing events, including idempotency, event-driven flows and graceful degradation.\n\nRelated sub-applications. Understand how the sportsbook connects to its surrounding sub-systems - player account management (PAM) and wallet, bonuses & promotions, payments, and responsible-gambling and compliance controls.\n\nVendor ecosystem. Bring practical experience integrating the key vendors in our space - for example Sportradar (data, pricing and integrity feeds), Optimove (CRM and retention) and Seon (fraud, KYC/AML) - and the judgement to know when to buy versus build.\n\nArchitecture leadership and governance\nPrinciples and standards. Uphold and evolve our architecture principles - high cohesion and low coupling, clear domain boundaries, API-first and API-based integration, stateless and containerised services - and set reference patterns and standards teams can reuse.\n\nTechnical authority. Act as the senior escalation point for complex technical decisions, architecture reviews and trade-offs, balancing tactical change against long-term goals to minimise technical debt.\n\nPragmatic technology choices. Apply our open-source, open-standards, vendor-neutral and buy-over-build philosophy, and our infrastructure direction (hub-and-spoke, IaC with Terraform/Ansible, containerisation with Docker/Kubernetes/ECS, blue-green deployment).\n\nCompliance by design. Design to the security and regulatory obligations of a UK and Ireland gambling operator - PCI, tokenisation of cardholder data, GDPR and gambling regulations.\n\nCollaboration\nWith delivery. Work closely with the Head of Engineering Delivery so architecture is realistic, sequenced sensibly and executable across our Dundalk and Serbia teams.\n\nWith product and strategy. Partner with the Director of Product and CPTO to shape the roadmap with a clear-eyed view of technical feasibility, risk and effort.\n\nUplift the team. Raise the architectural capability of the wider engineering organisation through mentoring, review and example.\n\nSkills and Experience\nEssential\n10+ years of industry experience in software engineering and architecture, with a substantial portion as a practising architect.\n\nDemonstrable experience as an architect at a recognised sportsbook (casino/iGaming experience also valued), with first-hand understanding of the fundamentals of building a sportsbook and its related sub-applications.\n\nDeep knowledge of core sportsbook logic - odds/price ingestion, bet placement, liability and risk/trading, cash-out and settlement - and the scalability, latency and resilience challenges of live betting.\n\nProven track record architecting and delivering (not just designing) large-scale change: cloud migration to AWS, monolith-to-microservices decomposition, event-driven architectures and front-end re-architecture.\n\nHands-on experience integrating major industry vendors such as Sportradar, Optimove and Seon (or close equivalents), and sound buy-versus-build judgement.\n\nStrong command of modern stacks and practices relevant to us - .NET, React/micro-frontends, Oracle and other data stores, Kafka/event streaming, CI/CD, containerisation and IaC.\n\nAbility to operate as a senior peer and technical authority - influencing stakeholders, leading through complexity and remaining hands-on in delivery.\n\nDesirable\nExperience in regulated, high-availability environments and familiarity with PCI, KYC/AML, GDPR and responsible-gambling controls.\n\nExperience with additional betting/iGaming platforms, trading systems or data providers, and with payments, CRM or fraud/identity vendors.\n\nExperience working across distributed engineering hubs.\n\nBachelor’s or Master’s degree in Computer Science, Engineering or a related field, or equivalent industry track record.\n\nWhat Success Looks Like\nThe AWS migration, sportsbook front-end re-architecture and monolith decomposition are designed, sequenced and delivered with minimal disruption to live trading.\n\nArchitecture decisions are made decisively and coherently, with the hardest technical risks owned and resolved.\n\nSquads have clear, executable designs and reference patterns, and the platform’s technical debt trends down as modernisation progresses.\n\nWhat We Offer\nCompetitive salary and benefits package befitting a senior, business-critical role.\n\nThe chance to own and execute a landmark platform transformation for a market-leading sportsbook.\n\nFlexibility to be based in Dundalk, our Serbia technology hub, or remote.\n\nA collaborative, ambitious engineering culture investing seriously in modern architecture.\n\nAbout Greencastle Digital\nWelcome to Greencastle Digital - where technology meets innovation in the exciting world of betting and gaming. Based in Belgrade, Serbia, we bring together talented people from all areas of digital tech, product development, customer experience, and marketing to create cutting-edge solutions.\nAt Greencastle Digital, it’s not just about building great technology - it’s about shaping the future of gaming and creating unforgettable experiences for our global players and partners. Whether you’re working on ground breaking tech, designing immersive games, or crafting customer-first solutions, you’ll be part of a dynamic, collaborative team where creativity and fresh ideas are always welcome.","description_format":"text","description_chars":8627,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"Serbia","iso":"RS","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-21T13:08:32Z"}],"visa":[],"liveness":{"score":10,"band":"cold","label":"Long shot","p_open":1,"p_active":0.364,"p_room":0.28,"age_days":98,"expected_fill_days":30,"reasons":["conf:14","win:tail","crowd:"],"computed_at":"2026-10-28T05:59:10Z"},"pay":null,"html_url":"https://alion.io/job/green-castle-digital-principal-solution-architect","json_url":"https://alion.io/job/green-castle-digital-principal-solution-architect.json","meta":{"generated_at":"2026-10-29T01:10:19Z","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":1639,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-30T00:00:00Z"}},"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":4457459},"rest":"https://alion.io/mcp/rest/get_company?id=4457459"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fgreen-castle-digital-principal-solution-architect"},{"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%2Fgreen-castle-digital-principal-solution-architect"},{"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%2Fgreen-castle-digital-principal-solution-architect"},{"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/green-castle-digital-principal-solution-architect\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fgreen-castle-digital-principal-solution-architect"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3004124}},{"tool":"search_jobs","arguments":{"company":"greencastledigital.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3004124},"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); https://alion.io/mcp with an Alion account has everything. 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