Lead AdTech Architect (SSP & DSP)

Job description

G5 Games is a Swedish developer and publisher of mobile games, founded in 2001. Our projects — Sherlock, Hidden City®, Jewels of Rome®, and others — have reached an audience of 300 million players worldwide. The average tenure of our employees is 6 years: this is a company where experts stay for the long term.

Leaders at G5 work in a global environment with experienced professionals and influence both processes and product.

We are currently looking for an experienced Lead AdTech Architect (SSP & DSP) to lead the development and evolution of our proprietary AdTech platform (SDK + SSP + DSP), combining strategic architectural planning with technical leadership and hands-on involvement in designing and bringing a high-load system into production.

What you will work on:

        Advertising SDK Development

• Design the architecture of an advertising SDK for integration with Windows applications (Win32/UWP) and interaction with our proprietary SSP, including mechanisms for requesting, receiving, and displaying ads, as well as collecting impression, click, and other user interaction events.
• Define requirements for SDK performance, reliability, security, and compatibility with various applications, lead its technical implementation, and ensure its future development and support for additional platforms.

        SSP (Supply-Side Platform) Development

• Design and launch an SSP to sell advertising inventory from our own games, with the subsequent addition of third-party publishers, including the implementation of ad auctions, inventory management, placement rules, floor prices, and ad formats.
• Design SSP integrations with existing mediation solutions, ad exchanges, external DSPs, and other demand sources, as well as technical solutions for publisher onboarding, application and ad placement configuration, reporting, settlements, and traffic quality control, with the ability to expand beyond Windows.

        DSP (Demand-Side Platform) Development

• Design the architecture for purchasing ad impressions and managing advertising campaigns, including budget, audience, creative, and frequency cap configuration, bidding logic, pacing, and campaign optimization.
• Ensure campaign performance measurement and reconciliation of results with advertisers and publishers, and evaluate the feasibility of developing DSP components in-house versus using partner solutions.

        Technical Architecture and Development Leadership

• Define the target architecture of the AdTech platform, technical roadmap, and phased launch plan; design API and RTB integrations based on OpenAPI, OpenRTB, and relevant industry standards, ensuring low-latency RTB auctions, high availability, scalability, observability, and protection against ad fraud.
• Design the architecture of event collection, analytics, reporting, billing, and data reconciliation systems; define approaches to ensuring ad creative quality and supply chain transparency; collaborate with Game Development, Analytics, Ad Monetization, Product, and Marketing teams; and build and develop the engineering team as the platform grows.

What We Expect:

• Have experience in architectural design and documentation of complex systems using established approaches and notations (C4 Model, UML, architecture diagrams, ADRs).
• Have experience designing and developing SSPs, ad exchanges, DSPs, or other RTB platforms, including hands-on experience taking at least one side of an advertising platform from architecture design through to production, and strong technical experience with the other side.
• Be familiar with OpenRTB 2.x, have experience integrating with DSPs, SSPs, or ad exchanges, and understand how ad auctions work, including bid requests and bid responses, floor prices, timeouts, win/loss notifications, and billing notifications.
• Have experience working with SSP functionality, including inventory management, publisher onboarding, mediation, external demand sources, and revenue optimization.
• Have experience working with DSP functionality, including advertising campaign and budget management, targeting, bidding, pacing, optimization, and performance measurement.
• Have experience designing backend architectures, event streams, reporting systems, and financial reconciliation systems, and understand distributed backend architectures, network protocols (HTTP/HTTPS, TCP/IP), APIs, caching, and the principles of building high-performance web services in cloud environments (AWS/GCP/Azure).
• Be familiar with advertising formats and technologies (Display, Video, VAST, VPAID, MRAID, HTML creatives), ad quality control practices, fraud detection, advertising inventory protection, and advertising supply chain transparency standards (ads.txt, app-ads.txt, sellers.json, SupplyChain object).
• Demonstrate technical leadership skills, including the ability to justify architectural decisions, assess risks and development costs, set priorities, and develop an engineering team. Have a working level of English sufficient for negotiations with international partners and reading technical documentation.

Would Be a Plus:

• Have experience implementing and monetizing advertising in Windows games, including working with ad formats and integrating SDKs into UWP or Win32 applications.
• Understand personal data protection and user consent management requirements (Consent Management), including GDPR and their application in AdTech systems.
• Have experience applying ML or data-driven approaches to optimize bidding and revenue.
• Have experience contributing to the formation and development of engineering teams, including hiring specialists, developing technical expertise, and mentoring.

What We Offer:

• An employment contract or a contractor agreement, depending on your location.
• Fully remote work with company-provided equipment.
• Paid vacation and 3 additional sick days per year — no doctor's note required.
• Medical insurance and gym membership reimbursement.
• A close-knit team of professionals with deep expertise in mobile game development.
• Relocation support: financial assistance and guidance at every step — from choosing a country to obtaining legal status.

We look forward to your application!

More about G5 Games:

Follow us on social media: LinkedIn, Instagram, Facebook, Telegram, Medium, Artstation.

All official communications with G5 Games representatives are conducted exclusively through the g5.com domain. We carefully review each application within a week. If your experience and skills match our requirements, we will contact you for further discussion. If there isn’t a suitable position at the moment, we will add you to our talent pool and notify you when a relevant opportunity arises.