We are looking for a Software Architect with a strong focus on AI/ML to design and implement cutting-edge generative AI solutions. In this position, you will take full ownership of technical design decisions, define AI architecture strategy, and ensure the successful integration of advanced AI models into a complex AdTech platform.

Become an AI trailblazer in a growing department with executive support. Drive innovation in a mature, well-established platform while collaborating with industry leaders and international teams. From day one, build a scalable AI architecture with full ownership and support.

This is a unique opportunity combines classic architectural leadership with modern AI technologies to drive product innovation and make a tangible impact on the advertising industry.

Customer
Our Customer is a Swedish AdTech company that transforms the way publishers and advertisers interact. They provide state-of-the-art self-serve advertising platforms that enable seamless, direct transactions between advertisers and some of the world’s largest publishers. Their mission is to make advertising more accessible, automated, and efficient through innovative technology. Together we serve globally recognized clients such as TripAdvisor, Bloomberg, The Washington Post, Opera, Dow Jones, etc. 

At Sigma Software, we collaborate with industry leaders like our Сustomer to push the boundaries of AI-driven automation in AdTech. As we continue to grow, we are looking for top talents to help shape the future of advertising with cutting-edge AI solutions. Join us in building intelligent, scalable, and impactful products in a fast-paced, dynamic environment. 

Project
The project is a scalable, white-label ad platform used by major global publishers. It integrates AI-driven automation to enhance advertising transactions, targeting efficiency, and personalization. As part of this initiative, you’ll design AI architecture from the ground up, ensuring production-ready, scalable solutions.

• Define an AI architecture strategy, ensuring alignment with product goals and engineering best practices
• Design, validate, and oversee the implementation of scalable, production-ready generative AI and agentic AI solutions (LLMs and AI agents)
• Lead technical design sessions, architecture reviews, and quality assurance processes
• Collaborate closely with cross-functional teams to integrate AI models into the product ecosystem
• Ensure that technical decisions align with the budget, long-term vision, and business constraints
• Establish architectural quality criteria, metrics, and documentation.
• Mentor engineers on AI/ML best practices, code quality, and system design
• Promote the reuse of existing solutions and evaluate third-party tools when appropriate
• Apply MLOps practices for deployment, performance monitoring, and version control
• Stay up to date with AI trends, drive R&D initiatives, and represent the project’s AI direction

• 5+ years of experience as a Software Architect or Senior Software Engineer with architecture responsibilities
• Proven experience with AI/ML systems, particularly in Generative AI (LLMs, image or text generation, and agentic systems)
• Deep knowledge of Python or Go, and ML frameworks (e.g., TensorFlow, PyTorch, and HuggingFace)
• Experience in deploying and fine-tuning LLMs at scale
• Knowledge of transformer-based architectures
• Strong understanding of software design principles, the architecture lifecycle, and scalable distributed systems
• Familiarity with AWS cloud services and MLOps practices
• Excellent communication skills and the ability to translate complex concepts for technical and non-technical audiences
• Upper-Intermediate level of English or higher
   

  Will be a plus:

• Previous experience leading AI architecture in a product development environment
• Background in AdTech or media publishing domain
• Experience with A/B testing, AI experimentation frameworks, and data pipelines
• Degree in computer science, machine learning, or a related field. A PhD is a plus

Personal profile:

• Strong leadership and an ownership mindset
• Ability to innovate in mature, large-scale systems
• Comfortable working in international, cross-functional teams
• Passion for AI/ML and emerging technologies