Role Description - Develop and maintain the core game technology infrastructure that serves as the backend for our game worlds. - Architect systems that allow games, marketplaces, and user-generated content/platforms to communicate and interoperate seamlessly. - Work closely with game designers and other software engineers to ensure that our technology meets the needs of our games and players. - Continuously improve and optimize the performance, reliability, and scalability of our infrastructure. Qualifications - 5+ years of professional experience as a software engineer, with a focus on distributed systems or backend. - Strong understanding of distributed systems principles and algorithms. - Proficiency in Go with prior experience shipping production-grade code. - Experience with container orchestration software (Docker, Kubernetes, etc.). - Excellent problem-solving and communication skills. - Passion for games and game technology. Requirements - Experience with game technology infrastructure development and/or game engine development (nice to have). - Proficiency in Rust (nice to have). - Experience leading an engineering team (nice to have). - Experience with blockchain core protocol engineering (nice to have). - Experience with Cosmos SDK (nice to have).

Role Description You’ll lead the development of a new, Rust-like programming language intended to run in kernel-space. Expect to write and review design documents, implementation decisions, lots of code, machine-checked proofs, and LaTeX specifications. - Develop an existing compiler codebase and software to continuously test and verify its correctness - Formally verify language properties and implementations - Collaborate and co-design with OS and networking teams to tightly integrate the language into the overall product - Participate in both sides of code reviews - Actively anticipate and communicate future roadblocks - Participate in the open-sourcing of the language Qualifications - 3+ years of software engineering experience - Deep understanding of type systems and logic systems: formal specification, design, implementation, and trade-offs - Experience with formal programming language semantic specifications, proofs, and ability to translate them into code - Experience with formal verification including model checking, theorem provers and SMT-based approaches - Understanding of system-level language concerns such as binary formats, loading, ABIs, linking, and machine targets - Mastery of or ability to quickly master Rust - High level of independence and autonomy - Ability and willingness to document, teach, and explain complex technical problems and solutions Benefits - Compensation is comprised of a competitive market salary and stock grant (>= 0.4%) conditioned on a vesting schedule - Unlimited paid and unpaid vacation time - Reimbursable vacation expenses (transportation and lodging up to $1k) - A triennial $4k computing device allowance - Comprehensive medical, dental, and vision insurance - $120 monthly gym allowance - $250 yearly to spend on anything educational

• Administer, install, configure, upgrade, and maintain IBM z/OS mainframe environments, including CICS Transaction Server, IBM MQ, and related software products • Perform software installations, migrations, upgrades, patching, and implementation activities across multiple mainframe environments • Troubleshoot and resolve system abends, outages, and performance issues using logs, traces, dumps, and monitoring tools • Manage IBM MQ environments, including queue managers, queues, channels, backup processing, and web services administration • Monitor and tune system and middleware performance to ensure availability, reliability, and operational efficiency • Support secure and compliant system operations in accordance with cybersecurity and enterprise security requirements • Develop and execute implementation plans, test plans, recovery plans, and back-out procedures for software and hardware changes • Coordinate change management, incident management, CAB activities, and cross-functional implementation efforts using approved operational processes and tools • Create and maintain technical documentation, standard operating procedures, implementation guides, root cause analysis reports, and status updates • Utilize SMP/E, JCL, TSO/ISPF, REXX, CLIST, COBOL, and related IBM utilities to support administration, automation, and system operations • Support backup, recovery, and disaster recovery planning, testing, and execution • Provide technical guidance, mentoring, training, and customer support to project teams, junior staff, and stakeholders • Collaborate with infrastructure, cybersecurity, application, and operations teams to ensure stable and secure mainframe services

• Contribute to developing cloud security blueprints for the Google Cloud Platform that incorporate security best practices used by the world’s largest companies. • A blueprint is a package of deployable, reusable modules and policies that implements and documents a specific security solution. • Development work is conducted on open-source projects.