Software Engineer II - Amplify Demos

About the role

The Amplify Engineering team builds internal tools, platforms, and AI-powered automation that help Klaviyos work more efficiently and at scale as the company grows. The Amplify Demos team builds and operates Klaviyo's demo platform - provisioning on-demand, fully customized instances of Klaviyo that enable the Sales team to deliver live product demos featuring the full suite of our products to prospective customers.

Responsibilities

• Design, build, and maintain internal products and platforms, including internal web applications, APIs, data and event pipelines, and AI-powered workflows used daily by Sales, Marketing, Customer Service & Success, R&D, and Finance teams.
• Execute and deliver projects with increasing autonomy and complexity.
• Translate real operational problems into pragmatic, maintainable software. Work closely with internal customers to understand their workflows and constraints, then design AI-forward tools and automations that measurably improve throughput, quality, and reliability of their work.
• Contribute to the technical and architectural evolution of Amplify’s systems. Help evolve our internal platforms, services, and AI workflows, contributing to design decisions, patterns, and improvements that keep our systems scalable, observable, and reliable as usage grows.
• Own the quality and operational health of the code you ship. Be responsible for the full lifecycle of your work – implementation, testing, deployment, monitoring, and follow-up improvements, including debugging issues in development and production, and participating in on-call rotations for the systems your team owns.
• Use modern AI tools as part of your day-to-day engineering workflow. Leverage AI for coding, testing, documentation, and experimentation (e.g., LLMs, AI coding assistants, internal AI platforms), and share what works well so the team can continuously improve its AI-augmented workflows.
• Improve the developer experience and engineering practices on Amplify. Help refine our tooling, tests, CI/CD, and automation, and contribute to shared patterns and utilities that make it easier for Amplify to build internal tools and workflows consistently and at high quality.
• Collaborate deeply with Product, Design, Data, and operational stakeholders. Contribute to technical discovery, help evaluate trade-offs, and ensure we’re solving the right problems with clear success criteria, tying your work directly to measurable business and customer outcomes.

Requirements

• Bachelor's degree in Computer Science, related field, or equivalent experience.
• 3-5+ years of hands-on software development experience building and operating highly available, full-stack or backend-heavy SaaS products, platforms, or internal tools at scale, or have demonstrated equivalent proficiency and impact.
• Comfortable taking a well-defined feature or small-to-medium project from requirements and design through implementation, testing, rollout, and maintenance, asking for guidance when needed but not waiting to be unblocked.
• Experience in at least one area of modern web architecture (e.g., backend services, data pipelines, internal tools, integrations, or AI-enabled workflows) and a good understanding of how to design systems that are secure, scalable, and maintainable.
• Practical experience building or integrating AI-powered systems and agents; e.g., workflows using LLM APIs/SDKs, agentic or automated workflows, RAG pipelines, or evaluation/monitoring frameworks.
• Familiarity with cloud infrastructure (AWS preferred), infrastructure-as-code (Terraform), and containerized environments (Kubernetes).

Qualifications

• Passionate about building software effectively and for the long term, balancing technical quality, velocity, and business impact.
• Strong communicator and collaborator. Contribute thoughtfully in technical discussions at the project level, write clear tickets and lightweight design docs, and keep your team and stakeholders up to date on progress, risks, and trade-offs.
• Enjoy working on small, autonomous, agile teams and shipping early and often, pairing with product managers, business stakeholders, and other engineers to craft better software.
• Intrinsically motivated to drive incremental improvements that deliver value to the business.

Skills

• Modern web architecture (backend services, data pipelines, internal tools, integrations, or AI-enabled workflows)
• Practical experience building or integrating AI-powered systems and agents
• Familiarity with cloud infrastructure (AWS preferred), infrastructure-as-code (Terraform), and containerized environments (Kubernetes)
• Responsible use of AI (including privacy, security, bias awareness, and human-in-the-loop)

Benefits

• Comprehensive health, welfare, and wellbeing benefits based on eligibility.
• Annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments.

Pay

• $116,000—$174,000 USD

Schedule

• Flexible schedule