Klaviyo · 8 hours ago
Senior Software Engineer - Amplify
Boston, MA
Full-time
Hybrid
Senior Level
$148K/yr - $222K/yr
6+ years expKlaviyo is a company that empowers creators to own their destiny by making first-party data accessible and actionable. They are seeking a Senior Software Engineer for their Amplify team to design and build internal platforms and AI-driven systems that enhance operational efficiency across various teams.
AdvertisingAnalyticsE-CommerceMarketing AutomationSoftware
Responsibilities
Design, build, and own complex internal products and platforms, including internal web applications, APIs, data and event pipelines, and AI-powered workflows that directly impact how Sales, Marketing, Customer Service & Success, R&D, and Finance teams operate day to day
Independently lead the end-to-end lifecycle of projects and features – from discovery and design through implementation, rollout, and long-term ownership
Translate real operational problems into scalable, maintainable solutions. You’ll partner closely with internal customers to understand their workflows and constraints, then design pragmatic, AI-first software that measurably improves throughput, quality, and reliability of their work
Own the technical and architectural evolution of parts of the Amplify platform, anticipating scalability, reliability, and observability needs as usage grows and as Klaviyo’s AI strategy evolves
Establish, refine, and uphold SLOs and operational health for the systems you own, ensuring they are reliable, observable, and fit for internal customer needs, including incidents, on-call participation, and follow-through on RCA actions
Drive an AI-first engineering workflow. You’ll use modern AI tools (e.g., OpenAI/Anthropic/Gemini models, Claude Code, Cursor, Copilot, etc.) for design, coding, testing, and documentation, and help define best practices for how Amplify engineers use AI to safely and efficiently ship software
Create and evolve shared patterns, tools, and processes that make it easier for Amplify and adjacent teams to build internal tools and AI agents consistently and at high quality (e.g., templates, SDKs, integration patterns, evaluation harnesses, observability standards)
Mentor and uplevel other engineers on the team through design reviews, pairing, feedback on technical documents, and by modeling excellent engineering practices that leave the codebase, systems, and processes better than you found them
Collaborate deeply with Product, Design, Data, and operational stakeholders to define requirements, trade-offs, and success metrics, ensuring Amplify’s systems are solving the highest-value problems with clear, measurable outcomes
Transform workflows by putting AI at the center, building smarter systems and ways of working from the ground up
Qualification
Required
BA or BS Degree in Computer Science, related field, or equivalent experience
6+ years of hands-on software development experience building and operating highly available, full-stack SaaS products at scale, or have demonstrated equivalent proficiency and impact
Independently responsible for the full lifecycle of complex projects or features, including discovery, technical design, implementation, rollout, and ongoing maintenance
Deep expertise in one or more areas of modern web architecture (e.g., backend services, data pipelines, internal tools, AI/ML infrastructure) and a strong understanding of scalable, multi-tenant design patterns
Experimented with AI in work or personal projects, and excited to dive in and learn fast
Regularly use AI tools (e.g., OpenAI/Anthropic/Gemini models, Claude Code, Cursor, Copilot, etc.) to accelerate development, improve code quality, and explore new solutions
Own the operational health of the systems you build, including performance, reliability, and observability
Question convention and proactively look for ways to improve, whether that's workflows, architecture, tooling, or team processes
Excellent communicator and collaborator, leading technical discussions at the project and product-area level
Mentor and support other engineers, offering thoughtful feedback in design and code reviews
Enjoy working on small, autonomous, agile teams, shipping early and often
Preferred
Experience building internal tools, platforms, or automations for developers and/or non-technical stakeholders, with a track record of improving reliability, productivity, or operational efficiency
Hands-on experience in full-stack environments, including diagnosing and improving application performance, database queries, and complex, multi-service workflows
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), including how to design services that run reliably at scale in those environments
Benefits
Participation in the company’s annual cash bonus plan
Variable compensation (OTE) for sales and customer success roles
Equity
Sign-on payments
Comprehensive range of health, welfare, and wellbeing benefits based on eligibility
Company
Klaviyo
Klaviyo is an automation and email platform designed to help grow businesses.
1001-5000 employees
H1B Sponsorship
Klaviyo has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (47)
2024 (29)
2023 (24)
2022 (27)
2021 (21)
2020 (8)
Funding
Current Stage
Public CompanyTotal Funding
$1.35BKey Investors
ShopifySands Capital VenturesAccel
2025-08-13Post Ipo Secondary· $195.06M
2025-05-14Post Ipo Secondary· $372.95M
2023-09-20IPO
Leadership Team
Andrew Bialecki
CEO
Ed Hallen
Co-Founder, Chief Strategy Officer, Board Member
Recent News
Investing.com
2026-01-03
2025-12-17
Company data provided by crunchbase