Klaviyo · 1 month ago
Lead Software Engineer - Campaigns
Boston, MA
Full-time
Hybrid
Senior Level, Lead/Staff
$188K/yr - $282K/yr
7+ years expKlaviyo is a company that empowers creators to own their destiny by making first-party data accessible and actionable. They are seeking a Lead Software Engineer to provide technical oversight and direction for the Campaigns Configuration team, focusing on building and improving the marketing campaigns experience for customers.
AdvertisingAnalyticsE-CommerceMarketing AutomationSoftware
Responsibilities
Provide technical oversight and direction across a portfolio of projects
Shape and execute on the forward-looking architecture for multiple Campaigns domains
Partner closely with the Engineering Manager, Product, and Design on strategy, planning, and execution
Work through influence and delegation to help the team deliver reliably and at a high bar of quality
Lead technical direction for Campaigns Configuration
Provide technical oversight and direction for a portfolio of Campaigns projects, including new channels, personalization, and analytics
Formulate and drive a forward-looking technical vision that aligns with broader business and platform initiatives
Own architecture and domain evolution
Be responsible for the technical and architectural evolution of multiple key Campaigns domains (e.g., configuration, scheduling, reporting)
Drive domain decomposition, service boundaries, and data model design to improve scalability, performance, and operational excellence
Deliver high-quality, scalable features
Lead the design and implementation of best-in-class web experiences using React and TypeScript, backed by REST and GraphQL APIs
Ensure backend systems are robust, observable, and performant, with an eye on peak traffic events
Scrutinize and reduce technical ambiguity and risk for upcoming projects through design reviews, technical spikes, and clear decision records
Create and improve engineering processes
Work with the Engineering Manager to ensure team adherence to solid engineering practices (testing, observability, rollout strategies, incident response)
Create, teach, and improve shared engineering processes and patterns that can be adopted by adjacent teams
Uplevel adjacent processes, technology, and people by sharing best practices and reusable solutions
Influence beyond your immediate team
Act as the primary technical interface to other Campaigns and platform teams, ensuring cohesive end-to-end solutions
Regularly collaborate with technical leads in other areas to align on patterns, standards, and shared components
Mentor and grow others
Guide other engineers through design feedback, pairing, and thoughtful code reviews
Help teammates break down complex initiatives into clear, incremental deliverables with predictable timelines
Qualification
Required
7+ years of software engineering experience, including significant fullstack work
Strong backend experience, with a track record of building and scaling services in production
Hands-on experience with Frontend: React, TypeScript, and modern state management patterns (e.g., Redux or equivalent)
Hands-on experience with Backend: Python with Django, FastAPI (or equivalent web frameworks)
Hands-on experience with APIs: RESTful and GraphQL APIs
Hands-on experience with Data & performance: relational databases (e.g., MySQL/Postgres), query optimization, caching, and performance tuning
Experience acting as a tech lead or lead engineer for a team or domain
Strong systems and product thinking
Collaborative and influential
Growth-oriented
Proven track record delivering complex features in fast-paced, product-led environments
Familiarity with several technologies: Frontend: React, TypeScript, Redux; Backend: Python, Django, FastAPI; Data & messaging: MySQL, Redis, RabbitMQ, Pulsar; APIs: GraphQL, REST; Infrastructure: AWS, Terraform, Kubernetes
Preferred
Experience with marketing automation, messaging platforms, or analytics-heavy products
Benefits
Generous benefits
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