Senior Software Engineer

MNTN is a company that prioritizes its people, fostering a culture of trust and innovation in Connected TV advertising. The Senior Software Engineer will be responsible for architecting and evolving large-scale backend systems and API ecosystems, ensuring reliability and performance while collaborating closely with frontend teams.

Responsibilities:

• Be part of a team that focuses on our next-generation API platform
• Architect and evolve large-scale backend systems, foundational platform services, and API ecosystems that enable backend and frontend teams to move faster with consistency and reliability. Familiar with API-first design, concepts such as Atomic API design
• Define and refine domain models, service boundaries, and system interactions using domain-driven design (DDD) principles
• Participate in technical discussions across engineering teams, driving alignment on architecture, standards, documentation, and long-term platform strategy
• Design and drive implementation of scalable, observable, and fault-tolerant services—including caching, messaging, data pipelines, and service orchestration
• Expert in Observability-first development
• Partner with backend and frontend teams to ensure APIs and platform capabilities strongly support user experience and frontend architecture patterns (including MFE)
• Conduct deep-dive technical investigations, performance tuning, and root-cause analysis for complex systems in production
• Establish best practices for testing, release engineering, and operational excellence across the engineering organization
• Champion platform security, reliability, scalability, and long-term maintainability in every stage of the development lifecycle

Requirements:

• 5+ years building and scaling backend systems, distributed architectures, and API-driven platforms, with a strong record of delivering reliable, adaptable services
• Apply strict enforcement of best practices and ensure adherence to public API standards, such as OpenAPI
• Deep expertise in API strategy and design (REST, GraphQL, event-driven), including versioning, governance, and lifecycle management across domains
• Hands-on experience with modern backend languages (Node.js, TypeScript) and the ability to guide teams on best practices and technology choices
• Strong proficiency with relational databases—especially PostgreSQL—covering schema design, indexing, performance tuning, and data modeling
• Solid understanding of cloud-native architectures (GCP preferred), IaC tools, security principles, identity/auth, and production observability
• Comfort with development environments, scripting, debugging, and performance tuning, with a focus on automation and improving developer workflows
• Strong knowledge of CI/CD, automated testing, Git workflows, and release processes to ensure reliable, high-quality deployments
• Experience collaborating with UI/UX and frontend teams, with awareness of how API and domain design shape client architecture (including MFEs)
• Excellent communication skills, able to translate complex architectural concepts into clear guidance for both technical and non-technical stakeholders