{"id":2010717,"url":"https://alion.io/job/cboe-principal-software-engineer","title":"Principal Software Engineer","company":{"id":47851,"name":"Cboe","domain":"cboe.com","url":"https://alion.io/company/cboe","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Welcome to the Jungle","truth_index":null},"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":["Chicago, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":182325,"max":235950,"currency":"USD","period":"year","gross":null,"usd_annual":235950},"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Apache Kafka","optional":false},{"name":"API Gateway","optional":false},{"name":"ASP.NET Core","optional":false},{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Claude","optional":false},{"name":"Confluence","optional":false},{"name":"Datadog","optional":false},{"name":"Docker","optional":false},{"name":"Entity Framework Core","optional":false},{"name":"GCP","optional":false},{"name":"Git","optional":false},{"name":"Grafana","optional":false},{"name":"GraphQL","optional":false},{"name":"gRPC","optional":false},{"name":"gRPC for .NET","optional":false},{"name":"Jenkins","optional":false},{"name":"Jira","optional":false},{"name":"Kubernetes","optional":false},{"name":"Least Privilege","optional":false},{"name":"Linux","optional":false},{"name":"MySQL","optional":false},{"name":"OpenTelemetry","optional":false},{"name":"PostgreSQL","optional":false},{"name":"PowerShell","optional":false},{"name":"Prometheus","optional":false},{"name":"RabbitMQ","optional":false},{"name":"Redis","optional":false},{"name":"Rest API","optional":false},{"name":"Scrum","optional":false},{"name":"SQL","optional":false},{"name":"Swagger","optional":false},{"name":"TCP/IP","optional":false},{"name":"Time Series Forecasting","optional":false},{"name":"WebSockets","optional":false},{"name":"Windows","optional":false},{"name":"Wireshark","optional":false},{"name":"WPF","optional":false},{"name":"xUnit","optional":false}],"status":"live","first_seen_at":"2026-09-24T00:06:53Z","employer_posted_date":"2026-10-07","last_verified_at":"2026-10-08T22:10:28Z","board_verified":true,"closed_at":null,"days_open":15,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":15},"description":"Join Cboe's Data Vantage division as a Principal Software Engineer. In this hands-on role, you will lead the design and implementation of back-end services and API infrastructure for the Silexx order and execution management platform. You will work with AI coding assistants, define REST and gRPC contracts, build real-time data distribution, and establish back-end engineering standards. The ideal candidate has 10+ years of experience in back-end and distributed systems development, a deep understanding of RESTful and streaming transport protocols, and experience mentoring engineers.\nMissions\nLead the design, architecture, and implementation of Silexx’s back-end services in C#/.NET, including order and execution workflows, market data, analytics, and risk.\nOwn the API platform end to end: define REST, gRPC, and real-time streaming contracts, establish versioning and deprecation policy, and maintain backward compatibility.\nDrive observability, capacity planning, and performance profiling for systems that must remain available through market hours, and maintain a highly available production platform.\nProfil recherché\n - The ideal candidate has spent years building low-latency, high-volume distributed systems, has a deep understanding of RESTful, gRPC, and streaming transport protocols, and treats API design, versioning, and backward compatibility as first-class engineering concerns- 10+ years of hands-on experience in professional back-end and distributed systems development\n- A track record of building low-latency, high-volume, highly available distributed systems\n- Experience dealing with customers through support and requirements analysis\n- Experience mentoring engineers and providing technical leadership across teams\n- Demonstrated ownership of a platform-level or externally consumed API - design, versioning, documentation, and support of the consumers on it\n- Bachelor’s degree in Computer Science, Software Engineering, or a related STEM field\n- Expert-level command of C#/.NET and ASP.NET Core for building high-throughput, production-critical services\n- Strong OOP skills, experience with design patterns, and a solid grounding in computer science fundamentals including data structures, algorithms, and concurrency\n- Expertise in throughput optimization techniques, serialization (MessagePack, Protobuf), and compression methods\n- Proficiency in building RESTful APIs, gRPC services, WebSockets, and other real-time communication methods\n- Strong understanding of data structures and algorithms, profiling, and performance optimization\n- Experience with message brokers and streaming platforms such as Kafka, RabbitMQ, or Redis\n- Advanced experience with C#/.NET and ASP.NET Core, including async/await, concurrency and threading models, and memory- and GC-aware performance work\n- Microservices architecture, service decomposition, and event-driven design\n- Strong SQL skills, sufficient to write and tune complex queries against production workloads\n- Testing & Quality:\n- Experience embedding automated tests into CI/CD pipelines as release gates\n- Contract-first API design using OpenAPI/Swagger and Protobuf IDL, with a deliberate approach to schema evolution and versioning\n- Data & Persistence:\n- Networking fundamentals - TCP/IP, TLS, HTTP/2, load balancing, and connection management for long-lived streaming sessions\n- Proficient in database technologies such as Postgres, SQL Server, and MySQL, and ORM frameworks like Entity Framework\n- Security:\n- Experience publishing and maintaining developer-facing API documentation and client SDKs\n- Load, soak, and latency testing of services at realistic market-hour volumes\n- Secure API practices including input validation, secrets management, and least-privilege access\n- Command of API gateway concerns: routing, throttling and rate limiting, quotas, idempotency, pagination, and a consistent error model\n- Expertise designing and implementing unit, integration, and contract test automation for services and APIs, using xUnit/NUnit and API/contract testing tooling\n- API Platform & Integration:\n- Expertise in implementing authentication and authorization using OpenID Connect, OAuth 2.0, and related security standards\n- Schema design, indexing, query tuning, and zero-downtime migrations across transactional and time-series workloads\n- Experience with security code scanning and remediating identified vulnerabilities\n- Proficiency using AI coding assistants such as Claude for code generation, test creation, code review, and refactoring\n- Familiarity with Agile/Scrum methodologies and DevOps practices (CI/CD pipelines, automated testing, etc.)\n- Comfortable with Windows and Linux operating systems\n- Excellent communication, problem-solving, and leadership skills\n- Other Skills:\n- Containerization (Docker/Kubernetes) and cloud platforms (Azure, AWS, or GCP)\n- Experience with financial industry systems, real-time trading, order routing workflows, market data distribution, or equity, option and futures trading platforms\n- Familiarity with the FIX protocol and OEMS or venue integrations\n- Observability and SRE practice - OpenTelemetry, Prometheus, Grafana, or Datadog, and working with SLOs and error budgets\n- Familiarity with GraphQL\n- Working knowledge of WPF desktop clients sufficient to build APIs against, integrate with, and test them (e.g., the Silexx OEMS)\n- Experience with tools such as PowerShell, Git, Jenkins, Jira, Confluence, JetBrains Suite, and Wireshark","description_format":"text","description_chars":5482,"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":["Equity"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Marketplaces","Cryptocurrencies","E-learning","Stock Exchanges & Market Infrastructure"],"lifecycle":[{"event":"open","at":"2026-10-07T13:02:03Z"}],"visa":[],"liveness":{"score":70,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.778,"p_room":0.9,"age_days":14,"expected_fill_days":23,"reasons":["conf:0","win:mid"],"computed_at":"2026-10-08T05:49:30Z"},"pay":{"stated_usd_annual":235950,"is_top_pay":true},"html_url":"https://alion.io/job/cboe-principal-software-engineer","json_url":"https://alion.io/job/cboe-principal-software-engineer.json","meta":{"generated_at":"2026-10-09T01:21:02Z","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","counted_by":"address","units_charged":1,"used_today":2141,"day_limit":5000,"remaining_today":2859,"minute_limit":60,"resets_at":"2026-10-10T00:00:00Z"}},"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":47851},"rest":"https://alion.io/mcp/rest/get_company?id=47851"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcboe-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%2Fcboe-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%2Fcboe-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/cboe-principal-software-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcboe-principal-software-engineer"}]}