Testing Public Posting in Claude

Who Our Client Is:

Our client builds the geolocation compliance layer for regulated online sports betting and gaming. Before an operator can accept a wager, they must prove the player is physically located where the law requires and demonstrate this to a regulator on demand. Our client solves this problem in real time, at scale, for some of the largest betting operators in the US and internationally.

What Our Client Needs:

Our client is seeking a Staff Full Stack Engineer to build features end-to-end, from the SDK running on a player’s device through to the backend services that decide whether a wager can be placed. This is a senior individual contributor role with no direct reports, working remotely within the Philadelphia to New York City corridor, with regular in-person collaboration in Philadelphia and occasional international travel to meet the distributed engineering team.

What You’ll Do:

• Design, build, test, and ship features end-to-end across the stack, from SDK and Portal through APIs, backend services, and the data pipeline
• Take a customer problem from report to verified fix regardless of which component it originates in, following the behavior across system boundaries rather than handing it off
• Contribute production code to the Java/Spring backend services, the Kotlin Multiplatform SDK and its native layers, and the Angular/TypeScript Portal and JavaScript Web SDK
• Ensure consistent behavior and feature parity across platforms, including naming, metrics, and semantics shared between native and web implementations
• Raise the technical standard through code review, pairing, and documenting architectural decisions and their rationale
• Own what you ship in production, including performance, on-call participation, incident response, and root-cause resolution
• Partner with Product, QA, SRE, and Compliance to define requirements, scope testing, and deliver reliable production releases
• Ensure releases meet regulatory and compliance requirements, including appropriate testing, documentation, change controls, and evidence requirements
• Drive effective async collaboration across the distributed organization, clearly communicating technical decisions, progress, risks, and recommended solutions

What You’ll Need:

• Staff-level engineering experience delivering complex features end-to-end across multiple layers of a production system
• Strong backend expertise in Java and Spring/Spring Boot, including REST APIs and microservices
• Strong client-side expertise in TypeScript and JavaScript, including production experience with a modern framework such as Angular
• Hands-on experience with client SDK development, whether mobile, desktop, or browser, including Kotlin, Kotlin Multiplatform, or equivalent native platform experience
• Experience building or maintaining SDKs consumed by third-party applications, including session lifecycle, configuration and feature-flag delivery, and integration ergonomics for client developers
• Experience building and operating low-latency, high-throughput, mission-critical systems, including capacity planning, load testing, and diagnosing latency at the tail rather than the mean
• Strong cloud infrastructure experience, including containers, orchestration, multi-region and multi-tenant environments
• Security-conscious engineering experience, including TLS, token management, certificate validation, request/response signing, and device attestation
• Strong testing practices across units, integration and automated regression testing, plus modern CI/CD and Git workflows

What They Offer:

• Compensation range of $100,000 to $120,000
• Comprehensive medical, dental, and vision insurance
• 100% employer-paid employee health premiums
• 50% employer-paid premiums for eligible dependents
• 3 weeks of paid vacation starting in the first year
• Paid sick time and company holidays
• 401(k) retirement plan with strong company match
• 100% company-paid life insurance and AD&D