Senior Backend Engineer

About us

Xpend Marketing develops custom marketing tools that help B2B service providers drive traffic, onboard users, and retain customers at scale. We partner with companies that support leading B2C brands in marketing, operations, customer service, and user engagement—equipping them with the tools to reach massive audiences and deliver measurable results. Our solutions power the full funnel: from precision outreach to seamless activation and long-term retention. With a team of top-tier developers and deep expertise in social media marketing, Xpend delivers the infrastructure behind the success of leading digital experiences. We enable our clients to tap into networks of hundreds of thousands of influencers and launch campaigns that move fast, go wide, and truly convert.

We are looking for a Senior Backend Engineer with deep expertise in Node.js and TypeScript to help shape the architecture, performance, and quality of our backend systems. This role is highly hands-on and focuses on building, optimizing, and scaling complex SaaS applications operating in high-volume, multi-user environments. You will contribute to backend technical standards, take part in architectural decisions, and play a key role in hands-on development and code reviews. Strong, hands-on experience with AI-assisted development is mandatory.

Key Responsibilities

• Contribute to the backend architecture of complex, large-scale SaaS applications
• Be hands-on with Node.js and TypeScript, setting high standards for code quality and maintainability
• Design and deliver end-to-end features, from data model and API design through to production rollout
• Drive code- and database-level performance optimization in high-volume, multi-user production environments
• Build and maintain scalable services on AWS, with PostgreSQL as the primary data store
• Integrate AI-assisted development workflows and tooling (Cursor, Claude, Agents) into day-to-day engineering
• Collaborate closely with product and design teams

Requirements

• 6+ years of experience in backend development
• Strong hands-on expertise with Node.js, TypeScript, PostgreSQL, and AWS
• Proven experience optimizing code and database performance in high-volume, multi-user production environments (query tuning, indexing, caching, concurrency)
• Demonstrated ability to design and deliver end-to-end features independently
• Working knowledge of frontend development, with the ability to implement and extend React-based UI when needed
• Hands-on experience using AI coding assistants (e.g., Cursor, Claude) as a core part of the development workflow - mandatory

Nice to have

• Experience with Snowflake or other large-scale data warehouses
• Experience with performance monitoring and observability tools
• Familiarity with event-driven or distributed systems architectures

What We Offer

• A senior engineering role with meaningful influence on backend architecture
• Ownership of performance, quality, and scalability of our core systems
• Opportunity to work with cutting-edge AI-driven development workflows
• Collaboration with strong product, design, and engineering teams
• Competitive compensation and benefits