Senior Software Engineer, Client - Demonware - Vancouver, BC Requisition ID: R027559 Job Description: Your Mission The Client Code team builds and maintains the client-side online services SDK used by Call of Duty and other Activision titles. We own the C++ libraries and tooling that provide core network communication for games as well as connect game clients to Demonware’s wide range of online services. As a Senior Software Engineer (Client Code), you will design, implement, and evolve C++ client libraries and tools that power some of the biggest game launches in the world. Partnering closely with game studios and Demonware service teams, you will deliver robust APIs, efficient networking solutions, and reliable build pipelines across console and PC platforms. In this role, you will have the opportunity to raise the bar for build systems, CI processes, and overall developer experience, while owning and evolving core C++ client SDK components used across multiple AAA titles. You will also contribute to improving the reliability and observability of client-to-backend communications at massive scale and play a key role in mentoring engineers in modern C++, networking fundamentals, and build and tooling best practices. This role is based in our Vancouver, BC office and follows an onsite work schedule of four days per week. Own our build pipelines for the Client Code SDK: Maintain and improve Windows and console builds to accelerate developer feedback loops.

Keep CI fast, reliable, observable, and well-instrumented for all our C++ products.

Design and implement new features in our C++ client libraries.

Debug complex production issues that span client, network, and backend services, using logs, packet captures, and focused reproduction harnesses.

Collaborate with game teams to integrate SDK features, review usage patterns, and promote best practices.

Write and review technical designs, perform code reviews, and help define coding standards for the team.

Contribute to internal tooling (build systems, test harnesses, diagnostics tools) that make online features easier to test, validate, and ship.





8+ years of professional software engineering experience with C++ within games, engines, SDKs, or other performance-sensitive systems.

- Strong expertise in modern C++.
- Experience with C++ build systems e.g. Experience with building effective backwards compatible APIs or libraries.
- Strong understanding of networking fundamentals such as TCP/UDP, and REST APIs.
- Proficient with network debugging and observability tools such as Wireshark.
- Familiarity with CI/CD pipelines, e.g. Strong communication and collaboration skills with experience working directly with stakeholders, customers, and distributed engineering teams.
- Experience integrating online services SDKs into games or other client applications.

Experience building headless clients, bots, or load-test clients for multiplayer or online features.

Game or engine-level networking layers.

Telemetry / logging / metrics systems for a game or local client application.

Contributions to developer experience: internal tools, documentation, sample projects, or code-generation pipelines.

Interest in game development and online play – e.g., We work alongside engineers and creatives at our AAA partner studios and deliver the online and data services required by our massive franchises. We have launched well over 100 games, and our services connect multiple millions of players each day into epic entertainment experiences. We also have a strong history of supporting great franchises such as Tony Hawk, Crash Bandicoot, Diablo, Guitar Hero, and Skylanders. Our World At Activision, we strive to create the most iconic brands in gaming and entertainment. We’re driven by our mission to deliver unrivaled gaming experiences for the world to enjoy, together.



We are home to some of the most beloved entertainment franchises including Call of Duty, Crash Bandicoot, Tony Hawk’s Pro Skater, and Guitar Hero. As a leading worldwide developer, publisher and distributor of interactive entertainment and products, our "press start" is simple: delight hundreds of millions of players around the world with innovative, fun, thrilling, and engaging entertainment experiences. We have bold ambitions to create the most inclusive company as we know our success comes from the passionate, creative, and diverse teams within our organization. We’re in the business of delivering fun and unforgettable entertainment for our player community to enjoy. The standard base pay range for this role is $100,220.00 - $197,758.00 CAD. Actual amounts will vary depending on experience, performance and location. In addition to a competitive base pay, employees in this role may be eligible for incentive compensation. Extended health plan, including medical, dental, vision, life and AD&D; insurance, for employees and their dependents, as well as disability insurance

Paid holidays and vacation, paid sick time, compassion and bereavement leaves, parental leave

Mental health & wellbeing programs, fitness programs, free and discounted games, and a variety of other benefit programs like supplemental life & critical illness, legal service, and others

If the Company requires that you move geographic locations for the job, then you may also be eligible for relocation assistance

We are an equal prospect employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, gender identity, age, marital status, veteran status, or disability status, among other characteristics.

Research shows that women and members of other under-represented groups tend to not apply to jobs when they think they may not meet every qualification, when, in fact, they often do!

We are committed to working with and providing reasonable assistance to individuals with physical and mental disabilities.

📌 Senior Software Development Engineer (m/f) (H/F)
🏢 Activision Blizzard
📍 Vancouver