Klaviyo

Senior Software Engineer role focused on the Internationalisation Platform at Klaviyo. The role involves leading complex projects related to translations, localization, and multi-currency handling. A key future focus is delivering LLM workflows to enhance translation capabilities and developing new features for currency handling. The role requires strong systems thinking, full-stack development experience, and collaboration skills.

Principal Engineer, Core Infrastructure at Klaviyo. This role focuses on architecting and operating the core cloud platform (Kubernetes, service mesh, networking, storage, CI/CD, observability) and embedding AI into the developer experience to improve shipping speed and safety. The role requires significant experience in cloud platform engineering and a hands-on approach to integrating AI tools for developer productivity, AIOps, and operational excellence.

Engineering Manager for the Data Automation team at Klaviyo, focusing on building and scaling data infrastructure. The role involves leading a team of 7+ engineers, defining technical vision, and optimizing infrastructure. A key aspect is transforming workflows by integrating AI to build smarter systems and improve efficiency, though the core deliverable is data infrastructure rather than AI models themselves.

Principal Software Engineer focused on enterprise scalability for a multi-tenant SaaS platform. The role involves defining scalability fitness functions, designing sharding and partitioning strategies, and integrating AI for proactive anomaly detection, synthetic load generation, and guided runbooks to improve performance and resiliency. The engineer will lead architectural changes, hunt bottlenecks, and partner with teams to implement improvements, with a strong emphasis on cross-organizational influence and communicating technical work to business impact.

Senior Full Stack Engineer role focused on developing new products, with an expectation to experiment with and integrate AI into workflows and systems. The role involves end-to-end solution development, leadership, and mentoring, with a focus on innovation and speed in a fast-paced environment.

Software Engineer II, Data Automation at Klaviyo. This role focuses on building tooling for Data Platform engineers to provision and test infrastructure for core Klaviyo functionality and data-driven insights. The team operates a real-time data platform on AWS, using technologies like Python, Terraform, Kubernetes, and various databases and data processing tools. While the role is primarily engineering focused on infrastructure and data tooling, it explicitly mentions experimenting with AI tools and workflows to improve efficiency, indicating an 'Exploring' AI maturity signal and an AI score of 5 (using AI tools but not building them as the core craft).

Senior Software Engineer role focused on building the next generation of email delivery infrastructure. The role involves designing and implementing scalable, high-throughput services in Go, managing message queues, and ensuring systems scale for enterprise clients. A key aspect is transforming workflows by integrating AI to build smarter systems and improve efficiency, though the core product is not AI.

This role focuses on building security reporting dashboards and metrics, and also involves triaging, enriching, and escalating security detections. It requires data engineering, business intelligence, and security telemetry skills, with an emphasis on automation and leveraging AI/security tools for threat response.

Senior Accountant role focused on owning complex accounting areas, supporting financial close, ensuring compliance with GAAP and SOX, and collaborating cross-functionally. The role involves process improvement and leveraging AI-powered tools for efficiency, but the core function is accounting, not AI development.

Senior Analytics Engineer role focused on owning end-to-end data pipelines and modeling for GTM and Product domains. Responsibilities include building and maintaining data marts, designing dimensional models, ensuring data quality, and enabling reverse ETL workflows. Requires strong SQL, dbt, and Python skills, with experience in modern data stacks and cross-functional partnership.

Software Engineer II on the Core Infrastructure - Identity & Organizations team at Klaviyo. This role focuses on building and operating the foundational substrate for identity, access, organizations, and platform integrity. The team owns the data model and platform APIs that define customer accounts, including multi-account experiences, enterprise account hierarchies, organization-level lifecycle and policy enforcement, and onboarding/settings. The role involves end-to-end feature ownership, building the organization hierarchy platform, contributing to policy infrastructure, supporting compliance initiatives, and migrating logic from a monolith to services. It requires strong systems building, data modeling, and API design skills, with experience in backend or full-stack development.

This role is for a Lead Payroll Analyst responsible for global payroll operations, focusing on accuracy, compliance, and continuous improvement. The role involves functional leadership, end-to-end payroll execution, finance and compliance partnership, and cross-functional collaboration. A key aspect is identifying and leading initiatives to streamline and automate processes, including championing the use of AI tools for data validation and insights.

This is a Senior Recruiter (Contract) role at Klaviyo, focused on hiring for Go-to-Market (GTM) teams. The role involves building candidate pipelines, owning the full recruiting process, building relationships with hiring managers and candidates, and acting as a brand ambassador. A key aspect is leveraging AI tools to improve recruiting efficiency. The role requires 7+ years of recruiting experience, particularly in sales, customer success, and marketing, with strong sourcing skills and a data-driven approach.

Software Engineer II Devx role at Klaviyo, focusing on building and scaling features end-to-end within the API team. Responsibilities include contributing to public and internal API platforms, participating in code reviews, and collaborating on high-quality, scalable solutions. Requires experience with monolithic and microservices architectures, CI/CD, and strong debugging skills. The company emphasizes responsible AI use.

Software Engineer role focused on building and enhancing Klaviyo's core reporting analytics platform. The role involves full-stack development, working with data access, aggregation, and presentation layers, as well as front-end experiences. The team collaborates with Product, Design, and Data Science to deliver reporting capabilities that drive customer adoption and action, with opportunities to work on enterprise portfolio analytics, AI-assisted exploration, and agentic integrations.

Software Engineer II on the Billing & Monetization team at Klaviyo. This role will focus on building customer-facing products related to billing, tracking product usage, and pricing for new and existing products. The engineer will also work on international market expansion and support for large customers with complex payment needs. Experience with full-stack development, RESTful APIs, and pub/sub systems is required. Experience with payment systems is a plus.

Software Engineer II on the Identity & Access Management team at Klaviyo. This role focuses on building and operating the centralized authentication and authorization platform, including login, SSO, MFA, SCIM, and API auth. The engineer will own features end-to-end, contribute to platform extraction into microservices, build shared SDKs, and collaborate with other teams on security and compliance. The role requires experience in backend/full-stack services, strong fundamentals, and a motivation for security and identity problems. Familiarity with AI tools and workflows is a plus.

This role is for a Sr. Payroll Specialist in EMEA, responsible for UK & Ireland payroll and coordinating other regions. The role involves end-to-end payroll processing, ensuring compliance, and supporting process improvements and automation initiatives, including the use of AI tools within core payroll systems like Workday and CloudPay. The ideal candidate has 5+ years of payroll experience, multi-country payroll experience, and exposure to or interest in automation and AI in finance operations.

Senior Lead Software Engineer responsible for the architecture, health, and scaling of Klaviyo's high-volume message delivery systems within the Messaging Infra organization. Focuses on technical strategy, system architecture, platform rollouts, problem-solving, and mentorship to ensure a scalable, reliable, and performant platform for customer engagement across various messaging channels.

Software Engineer II on the Core Infrastructure – Identity & Organizations (Core IO) pillar, focusing on the Identity & Access Management (IAM) team. This role will design and build services for authentication, authorization, login, sessions, permissions, and secure service APIs. The engineer will contribute to platform extraction, build shared SDKs, and collaborate with other teams on security and compliance. The role requires experience in backend services, security/identity concepts, and a platform/infra mindset. While not AI-focused, the candidate is expected to have experimented with AI tools.

Klaviyo is seeking a Talent Acquisition Systems & Automation Lead to improve recruiting workflows, introduce automation, maintain data integrity, and build reporting infrastructure. This role sits at the intersection of recruiting, data, and workflow design, focusing on building systems to make hiring faster, smarter, and more impactful. The ideal candidate has experience in operations or talent programs, exposure to low-code/workflow automation/AI tools, and a strong track record of improving automation and systems.

Fullstack Software Engineer II role on the SMS International team within Mobile Platforms, responsible for expanding SMS capabilities into new countries and regions and developing RCS as a new capability. The role involves building new services, understanding their integration, and planning for their architecture and scaling.

Senior Lead Software Engineer for Developer Infrastructure at Klaviyo. This role focuses on defining technical strategy, architectural roadmaps, dependency management, platform upgrades, and enhancing developer productivity for the backend. The ideal candidate has extensive experience in software development, distributed systems, and cloud platforms, with strong leadership and problem-solving skills. While not directly building AI, the role encourages exploration and responsible use of AI tools to improve efficiency.

Software Engineer II on the Social team at Klaviyo, focusing on building end-to-end features that connect social channels to the core platform to capture customer data and engagement. The role involves tackling complex technical challenges, contributing to architectural decisions, and shipping reliable features. The team is expanding into a broader social growth platform, deepening integrations, and building smarter targeting and personalization.

Full Stack Engineer II at Klaviyo, a company focused on empowering creators with marketing automation tools. The role involves building and enhancing the Flows product, which includes a visual editor, management tools, analytics, and APIs for customer lifecycle programs. The team collaborates across engineering, product, and design to deliver reliable and performant solutions, with future focus on smarter recommendations and actionable insights.

Software Engineer II for Klaviyo's Flows Platform team, focusing on building and operating the core engine for automated lifecycle programs. This role involves developing high-scale backend solutions for processing events, sending messages, and ensuring reliable automation. Responsibilities include working on the core execution engine, scheduling, orchestration, and high-scale infrastructure for event-driven features.

This Director, Corporate IT role leads the strategy and execution of Klaviyo's internal technology environment, focusing on identity, endpoint management, collaboration tools, office technology, and enterprise systems. The role involves defining and driving the roadmap, leading a multi-disciplinary team, and ensuring the internal technology foundation is secure, reliable, compliant, and scalable. A key aspect is enabling an AI-native workforce and adopting AI/automation within Corporate IT for functions like AIOps and intelligent service desks. The role also requires supporting SOX, security, and compliance-ready operations, including IT General Controls (ITGCs).

Software Engineer role focused on building and operating scalable, highly-available distributed systems for Klaviyo's core engagement product, processing billions of messages daily. The role involves owning features, collaborating across teams, and improving system performance and scalability.

Software Engineer II role focused on building and scaling Klaviyo's WhatsApp channel product, including outbound/inbound pipelines and Meta template management. The role involves developing end-to-end solutions, improving existing features, and integrating new Meta capabilities to deliver a high-quality WhatsApp integration for marketing platforms.

Software Engineer II focused on Data Management and Governance within Klaviyo's real-time data platform. Responsibilities include designing, building, and maintaining large-scale distributed systems and databases, working with data processing and storage systems, and provisioning infrastructure. Requires experience in software engineering, distributed systems, cloud environments, databases, and infrastructure as code.

Software Engineer role focused on Catalog Insights and Analytics within Klaviyo's SaaS product. The role involves designing and building data processing systems and pipelines, collaborating with product and data science teams, and owning product solutions end-to-end. The tech stack includes Python, Typescript, React, AWS, Kubernetes, Django, and Spark. While the company mentions AI fluency and responsible AI use, the core responsibilities of this specific role are centered around data engineering and full-stack development for analytics features, not direct AI/ML model development or deployment.

Software Engineer II, Infrastructure Security at Klaviyo. This role focuses on building and operating cloud-native security services and platforms to ensure engineers can develop secure software at high speed. Responsibilities include designing, building, and maintaining security services, improving system availability and scalability, and collaborating on system design. The role requires experience with Python/Go, AWS, Kubernetes, and distributed systems, with a focus on security, reliability, and performance.

Software Engineer II, Reliability role focused on ensuring the reliability, scalability, and sustainability of Klaviyo's critical platforms. Responsibilities include building and operating production systems, automating operational tasks, improving observability, and participating in incident response. The role requires experience with cloud-native production systems, coding for automation, understanding distributed systems failure modes, and familiarity with SRE concepts. While not core to the role, candidates are encouraged to have experimented with AI tools for efficiency.

Senior Software Engineer, Reliability role focused on building and operating critical platforms, ensuring reliability, scalability, and sustainability. The role involves applying software engineering principles to automate infrastructure, reduce operational toil, and improve system reliability at scale, using SRE best practices. Key responsibilities include defining SLIs/SLOs, improving observability, participating in on-call rotations, and performing quantitative analysis. The ideal candidate is a cloud-native, platform-focused SRE with experience in distributed systems, Kubernetes, and observability tools. While not core to the role, experience with AI tools and workflows is a plus.

Lead Software Engineer, Reliability at Klaviyo responsible for setting technical direction and leading reliability strategy for critical platforms. Focuses on ensuring systems are reliable, scalable, and sustainable, treating reliability as a core product feature. Responsibilities include designing, building, and operating foundational infrastructure, defining reliability standards, reducing operational toil through automation, and improving systems based on production learnings. The role involves hands-on work with systems underpinning reliability and operational excellence, setting technical vision, leading design and implementation of critical services, driving adoption of SRE best practices, identifying and addressing reliability risks, automating infrastructure, owning observability and incident response, guiding on-call strategy, performing quantitative analysis, partnering with leaders, leading incident response, and mentoring engineers. The role also mentions experimenting with AI tools and workflows to improve work efficiency.

Senior Software Engineer for Klaviyo's DevX team, focusing on empowering external developers and partners building on Klaviyo's Public APIs. Responsibilities include working on the app marketplace, publishing workflows, and developer-facing tools, with a focus on API analytics powered by a high-throughput data pipeline. The role requires full-stack development experience, understanding of monolithic and microservices architectures, and CI/CD pipelines.

Engineering Manager for Klaviyo's Profile Traits team, responsible for building and scaling foundational systems that represent, store, mutate, and serve customer profile data. The role focuses on distributed systems, data modeling, and product semantics, ensuring reliability, performance, and platform evolution for features including AI-driven insights.

Senior Software Engineer on the Profiles, Lists and Segments team responsible for building and scaling core customer data experiences. The role focuses on designing and building scalable systems for customer data management and activation, with a strong emphasis on frontend development using TypeScript, React, and Python/Django. The engineer will collaborate with product managers, data scientists, and platform teams to create performant and user-friendly editors and workflows. The role also involves mentoring team members and driving initiatives.

Software Engineer II (Mobile Developer - Android/Kotlin) on the Mobile App Growth team, focusing on developing new greenfield projects, full-stack solutions, and enhancing mobile SDK offerings to expand Klaviyo's reach into comprehensive mobile engagement. The role involves working with mobile technologies, Django framework, and potentially other backend/frontend stacks.

Senior Lead Software Engineer for Developer Infrastructure at Klaviyo. This role focuses on defining technical strategy, architectural roadmaps, dependency management, platform upgrades, and enhancing developer productivity for the backend. The ideal candidate has extensive experience in software development, distributed systems, and cloud platforms, with strong leadership and problem-solving skills. While not directly building AI, the role encourages exploration and responsible use of AI tools to improve efficiency.

Engineering Manager for Klaviyo's Flows Insights & Management team, leading fullstack engineers to build and evolve customer-facing automation features, reporting, and personalization. The role involves technical leadership, architectural direction, people management, and collaboration with product and design teams. While not core AI development, the role encourages exploration and responsible use of AI tools to enhance work efficiency.

Director of Technical Talent Acquisition responsible for leading the technical recruiting strategy for engineering, product, and data teams. This role involves partnering with senior technical leaders, designing recruiting processes, innovating sourcing strategies, championing DEI, and leveraging AI to transform workflows.

Engineering Manager for Klaviyo's Core Data Platform, focusing on the Events system. The role involves leading and mentoring a team of 6-10 software engineers, owning features, coordinating project delivery, and contributing to architectural design and technical solutions. Requires strong experience in software development, engineering management, data storage, large-scale data pipelines, and real-time data ingestion.