K

Klaviyo

Builds marketing software for consumer brands

Senior Security Engineer - Detection and Response

Full-Time
$141.6k - $212.4k+ Annual cash bonus + Equity + Sign-on payments
Senior
San Francisco, CA, USA
In Person
CybersecuritySecurity Operations & Incident Response

About the job

Requirements
  • At least 5 years of experience in software, security, and/or data engineering.
  • Use an automation-first and AI-first approach in work performed.
  • Experience with centralized logging, data lakes, and security information and event management (SIEM) solutions.
  • Familiarity with large-scale data pipelines and data engineering techniques.
  • Proficiency in programming languages such as Python or Go, or similar languages, to automate and build systems.
  • Proven experience with Git/GitHub and continuous integration and continuous delivery (CI/CD) automations.
  • Familiarity with tactics, techniques, and procedures used by threat actors.
  • Experience participating in detection and response or incident response on-call rotations.
  • Strong oral and written communication skills.
Responsibilities
  • Build systems that facilitate security observability for detection and response.
  • Develop AI-first security systems to automate detection and response operations.
  • Onboard, normalize, and optimize security logging data for large-scale data analysis, detection engineering, deployment of machine learning models, and efficient querying during incidents.
  • Develop high-fidelity rule-based and/or machine-learning-based detections as code.
  • Respond to security alerts, cyber threats, and security incidents.
  • Drive end-to-end incident response investigations.
  • Automate and codify detection and response workflows and processes.
  • Conduct ad hoc threat hunts and participate in Detection and Response on-call rotations.

About the company

Klaviyo builds customer relationship software for consumer brands, combining marketing, customer service, analytics, and a customer data platform in one system. Its platform draws on shoppers' purchases, browsing, and message activity to create customer profiles that brands use to personalize communications. Businesses use these profiles to automate email, text, WhatsApp, and mobile push campaigns, while AI agents create marketing work and answer customer questions. Klaviyo earns subscription fees based on active customer profiles, message volumes, and service activity, rather than charging for each employee who uses the software. Founded in 2012, the company is headquartered in Boston, Massachusetts.

Company Size

1,001-5,000

Company Stage

IPO

Headquarters

Boston, Massachusetts

Founded

2012

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Simplify's Take

What believers are saying

  • Demand is expanding: August 2026 results showed Klaviyo quarterly revenue grew 26% to $370.6 million.
  • Cross-selling expands accounts: August 2026 results put 20% of Klaviyo annual recurring revenue with customers using three or more products.
  • Long tenure earns time away: Klaviyo promises a fully paid sabbatical every five years.

What critics are saying

  • Shopify concentration ties fortunes together: Shopify customers supplied 77.9% of Klaviyo annual recurring revenue at December 2025.
  • Revenue is easy to cancel: most Klaviyo subscriptions renew monthly, with five days' notice needed to stop renewal.
  • Expect AI in daily work: Klaviyo explicitly makes AI fluency a core employee expectation.

What makes Klaviyo unique

  • Shopify supplies a distribution advantage: Klaviyo is its preferred email platform partner.
  • Reviews feed customer acquisition: Klaviyo places product reviews directly inside subscriber signup forms.
  • Merchants learn from peers: Klaviyo benchmarks performance against anonymized businesses matched by industry, size, and market position.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

Health Savings Account/Flexible Spending Account

401(k) Company Match

Paid Holidays

Professional Development Budget

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

0%

2 year growth

2%
Lion Digital
Sep 29th, 2026
How eCommerce brands are turning repeat customers into their most profitable growth channel.

How eCommerce brands are turning repeat customers into their most profitable growth channel. Customer retention in eCommerce is more crucial than ever. Brands strive to offer special loyalty bonuses, VIP tiers, and subscription benefits to win over marketplaces that dominate the market. However, the infrastructure doesn't make it easy. Subscriptions, loyalty points, in-cart upsells, and customer portals are all scattered across separate apps to manage, and this stack grows heavier and more expensive with every new feature a brand adds. To solve this problem, LION Digital has partnered with PerkRunner, the all-in-one loyalty and subscription platform. It can help eCommerce brands unify the post-purchase experience and turn repeat customers into their most profitable growth channel. The solution built by operators who've lived the problem. PerkRunner was founded by brothers Benjamin and Robert Gibson, who spent years working with D2C drinks brands across LVMH, Chanel, Duckhorn Portfolio and hundreds more implementations. That experience showed them how brands struggle to deliver a good experience for shoppers due to messy multi-app management. PerkRunner became their answer for retail. The team wanted to make subscriptions and loyalty easier for brands to manage and better for customers. So the Gibson brothers funnelled their knowledge and expertise into a slick unified product that helps retailers do more with less! How PerkRunner delivers results. PerkRunner brings subscriptions, loyalty, memberships, customer perks, and in-store recognition into a single platform, replacing the multi-app stack. It helps eCommerce brands unify the whole experience, including: * Multi-Frequency Subscriptions - Flexible delivery schedules that adapt to how customers actually want to buy. * Spend-Based Loyalty Tiers - Automatic tier progression rewards customers as they spend, without manual admin or point-tracking spreadsheets. * Promotion Planning - Brands build out their unique site-wide or loyalty tier specific promotion schedules offering timebound or inventory-bound unique perks and experiences! * Smart Cart - In-cart upsells and rewards display, surfacing the right offer when a customer is most likely to act on it. * Self-Service Branded Customer Portal - A single hub where shoppers manage subscriptions, track loyalty status, and redeem perks, reducing support tickets and boosting satisfaction. * Shopify POS Integration - Loyalty and subscription benefits are recognised in-store, not just online, so the brand experience stays consistent across every touchpoint. * Recurring Revenue Analytics - Purpose-built reporting on subscriber growth, loyalty performance, and recurring revenue, giving brands a clear view of their most predictable income stream. PerkRunner is also deeply integrated with top apps most brands already use, like Klaviyo, so marketing automation and loyalty data work together. Proven success: iKOU. iKOU is an Australian luxury natural skincare, body care, and wellness brand. They deliver premium products and services and want their customer experience to be outstanding as well. That's what PerkRunner helped deliver. iKOU used the platform at full capacity. They run flexible subscriptions across a range of its key products, offer spend-based loyalty and rewards tiers with unique perks, and run the PerkRunner's Smart Cart to drive in-cart engagement. iKOU's managing director summed up the partnership: "PerkRunner came up as the clear winner for features, implementation, and support. This is a company that understands modern eCommerce and in-store experience." Ultimately, PerkRunner helped iKOU build stronger customer relationships and boost a powerful revenue channel. Complementing LION Digital's expertise. LION Digital is a marketing agency, specialising in eCommerce. With a veteran team combining over 25 years of dedicated industry experience, the team knows exactly where online businesses get stuck - and how to help them break through and grow. That's why LION Digital recommends PerkRunner, a forward-thinking technology that propels eCommerce brands into growth mode. It delivers flexibility across loyalty, rewards, subscriptions, and in-store recognition, so LION Digital clients can bring ideas to life faster and delight customers sooner without the delays and costs of managing a fragmented app stack. PerkRunner is particularly well-suited to beauty, health and fitness, pet, supplement, and other recurrent-use product brands, where subscription and loyalty behaviour are already central to how customers buy. Plus, it's wholly Australian-based and built, giving clients access to local support rather than an offshore help desk working across time zones. They're an adaptable team that focuses on quality over quantity and takes pride in the clients they work with. It's the same professional approach LION Digital stakes its reputation on. Improve customer retention with LION Digital and PerkRunner. If your brand is managing subscriptions, loyalty, and perks across a fragmented app stack, or if you're not yet offering them at all, now is the time to explore what PerkRunner can do. As a LION Digital partner offer, brands that come on board through this partnership receive free migration and 50% off subscription processing on 12-month agreements - that's effectively six months free. It's an offer exclusive to LION Digital clients and readers, with no usual setup cost or downtime. PerkRunner's team is also available for dedicated loyalty consultations to help scope out the right setup for your brand. Get in touch with LION Digital to explore what's possible for your brand, backed by LION's CRO expertise and PerkRunner's customer retention platform - LION Digital Pty Ltd'll help connect you with the right team for a consultation.

24/7 Business Reporter
Sep 25th, 2026
ECD Digital Strategy named Klaviyo Agency Partner of the Year for the Americas at K:BOS 2026.

ECD Digital Strategy named Klaviyo Agency Partner of the Year for the Americas at K:BOS 2026. ECD is the region's top-recognized Klaviyo agency partner, honored at K:BOS 2026 for measurable client growth and results. None of it happens without the team that shows up every day and the brands that trusted us with their revenue. This award belongs to all of them." - Zak Cassady-Dorion, Founder and CEO of ECD Digital Strategy SCHENECTADY, NY, UNITED STATES, September 25, 2026 / EINPresswire.com / - ECD Digital Strategy, an ROI-driven ecommerce digital marketing agency, was named Klaviyo Agency Partner of the Year for the Americas at K:BOS 2026, Klaviyo's flagship annual conference, held earlier this month at the Hynes Convention Center in Boston, Massachusetts The award was presented as part of Klaviyo's K:Partners Awards, a program now in its second year that recognized 24 agency and technology partners across the globe for sharper strategy, faster execution, and lasting client relationships. The Americas Agency Partner of the Year is among the highest distinctions Klaviyo bestows upon agency partners in this region. ECD was selected from a global partner ecosystem of more than 6,500 agencies based on innovation, creativity, customer success, and measurable impact for shared clients. "It's pretty surreal to look at something you wrote down years ago and realize you actually went and built it," said Zak Cassady-Dorion, Founder and CEO of ECD Digital Strategy. "None of it happens without the team that shows up every day and the brands that trusted us with their revenue. This award belongs to all of them." "Annually at K:BOS, Klaviyo recognizes partners who not only embrace our marketing channels but also lean into our innovations and future strategy, and the entire ECD Digital Strategy team has truly bought in, becoming incredible collaborators across our internal GTM teams," said Tyler Sahlstrom, Klaviyo Partner Manager. "This award is so well deserved, both for that effort and, most importantly, for the amazing results they drive for their Klaviyo clients." The recognition caps a milestone year for ECD. The agency was also named to the 2026 Inc. 5000 as one of America's fastest-growing private companies, with 106 percent three-year revenue growth. ECD holds Klaviyo Master Elite Partner status, one of roughly 35 agencies globally to hold this designation out of more than 22,000 Klaviyo partners worldwide, recognizing the agency's depth of platform expertise and consistent client performance. ECD helps DTC and ecommerce brands build connected revenue systems across email marketing, SMS marketing, paid media, paid search, Shopify development, lifecycle strategy, segmentation, and retention. The agency has helped clients drive 49 percent of total revenue through email and SMS, achieve 8.7x return on ad spend through paid media, lift conversion rates by 40 percent after Shopify and CRO improvements, and generate 538 percent year-over-year revenue growth through full-funnel strategy. Klaviyo powers more than 205,000 paying customers worldwide and serves as the leading autonomous B2C CRM platform for ecommerce brands. K:BOS, Klaviyo's flagship annual conference, brings together thousands of marketers, operators, and brand builders each year to explore the future of customer relationships, AI, and commerce. About ECD Digital Strategy ECD Digital Strategy is an ROI-driven ecommerce digital marketing agency headquartered in Schenectady, New York, founded in 2016 by Zak Cassady-Dorion. ECD helps DTC and ecommerce brands build revenue systems across email marketing, SMS marketing, paid media, paid search, Shopify website design and development, lifecycle strategy, and ecommerce site management. As a Klaviyo Master Elite Partner, one of roughly 35 agencies globally to hold this designation out of more than 22,000 Klaviyo partners worldwide, and the 2026 Klaviyo Agency Partner of the Year for the Americas, ECD is recognized for delivering measurable, profitable growth for the brands it partners with. Learn more at ecdigitalstrategy.com. Zak Cassady-Dorion ECD Digital Strategy +1 518-217-5651 [email protected] Visit us on social media: LinkedIn Instagram Facebook YouTube Legal Disclaimer: EIN Presswire provides this news content "as is" without warranty of any kind. We do not accept any responsibility or liability for the accuracy, content, images, videos, licenses, completeness, legality, or reliability of the information contained in this article. If you have any complaints or copyright issues related to this article, kindly contact the author above.

US National Times
Sep 25th, 2026
ECD Digital Strategy named Klaviyo Agency Partner of the Year for the Americas at K:BOS 2026.

ECD Digital Strategy named Klaviyo Agency Partner of the Year for the Americas at K:BOS 2026. ECD is the region's top-recognized Klaviyo agency partner, honored at K:BOS 2026 for measurable client growth and results. None of it happens without the team that shows up every day and the brands that trusted US National Times with their revenue. This award belongs to all of them." - Zak Cassady-Dorion, Founder and CEO of ECD Digital Strategy SCHENECTADY, NY, UNITED STATES, September 25, 2026 / EINPresswire.com / - ECD Digital Strategy, an ROI-driven ecommerce digital marketing agency, was named Klaviyo Agency Partner of the Year for the Americas at K:BOS 2026, Klaviyo's flagship annual conference, held earlier this month at the Hynes Convention Center in Boston, Massachusetts The award was presented as part of Klaviyo's K:Partners Awards, a program now in its second year that recognized 24 agency and technology partners across the globe for sharper strategy, faster execution, and lasting client relationships. The Americas Agency Partner of the Year is among the highest distinctions Klaviyo bestows upon agency partners in this region. ECD was selected from a global partner ecosystem of more than 6,500 agencies based on innovation, creativity, customer success, and measurable impact for shared clients. "It's pretty surreal to look at something you wrote down years ago and realize you actually went and built it," said Zak Cassady-Dorion, Founder and CEO of ECD Digital Strategy. "None of it happens without the team that shows up every day and the brands that trusted us with their revenue. This award belongs to all of them." "Annually at K:BOS, Klaviyo recognizes partners who not only embrace our marketing channels but also lean into our innovations and future strategy, and the entire ECD Digital Strategy team has truly bought in, becoming incredible collaborators across our internal GTM teams," said Tyler Sahlstrom, Klaviyo Partner Manager. "This award is so well deserved, both for that effort and, most importantly, for the amazing results they drive for their Klaviyo clients." The recognition caps a milestone year for ECD. The agency was also named to the 2026 Inc. 5000 as one of America's fastest-growing private companies, with 106 percent three-year revenue growth. ECD holds Klaviyo Master Elite Partner status, one of roughly 35 agencies globally to hold this designation out of more than 22,000 Klaviyo partners worldwide, recognizing the agency's depth of platform expertise and consistent client performance. ECD helps DTC and ecommerce brands build connected revenue systems across email marketing, SMS marketing, paid media, paid search, Shopify development, lifecycle strategy, segmentation, and retention. The agency has helped clients drive 49 percent of total revenue through email and SMS, achieve 8.7x return on ad spend through paid media, lift conversion rates by 40 percent after Shopify and CRO improvements, and generate 538 percent year-over-year revenue growth through full-funnel strategy. Klaviyo powers more than 205,000 paying customers worldwide and serves as the leading autonomous B2C CRM platform for ecommerce brands. K:BOS, Klaviyo's flagship annual conference, brings together thousands of marketers, operators, and brand builders each year to explore the future of customer relationships, AI, and commerce. About ECD Digital Strategy ECD Digital Strategy is an ROI-driven ecommerce digital marketing agency headquartered in Schenectady, New York, founded in 2016 by Zak Cassady-Dorion. ECD helps DTC and ecommerce brands build revenue systems across email marketing, SMS marketing, paid media, paid search, Shopify website design and development, lifecycle strategy, and ecommerce site management. As a Klaviyo Master Elite Partner, one of roughly 35 agencies globally to hold this designation out of more than 22,000 Klaviyo partners worldwide, and the 2026 Klaviyo Agency Partner of the Year for the Americas, ECD is recognized for delivering measurable, profitable growth for the brands it partners with. Learn more at ecdigitalstrategy.com. Zak Cassady-Dorion ECD Digital Strategy +1 518-217-5651 [email protected] Visit US National Times on social media: LinkedIn Instagram Facebook YouTube Legal Disclaimer: EIN Presswire provides this news content "as is" without warranty of any kind. US National Times do not accept any responsibility or liability for the accuracy, content, images, videos, licenses, completeness, legality, or reliability of the information contained in this article. If you have any complaints or copyright issues related to this article, kindly contact the author above.

Interactive Design Group
Sep 21st, 2026
What a real multi-vendor integration looks like: Olo, Klaviyo, and ADA compliance for a restaurant group.

What a real multi-vendor integration looks like: Olo, Klaviyo, and ADA compliance for a restaurant group. September 21, 2026 Most of what I write here is framed around what to ask before you sign with an agency. This one is a little different - it's what that work actually looks like once it's underway, using a real project as the example. I recently completed ADA and WCAG 2.1 AA remediation for a multi-location restaurant brand's WordPress site, and followed that with a Martech project integrating Olo's online ordering system with Klaviyo for automated marketing. Doing the compliance work first, then layering integrations on top of it, is a good illustration of how these pieces have to fit together rather than get bolted on separately. The starting problem. The site needed ADA and WCAG 2.1 AA remediation first, before any new functionality was layered on - fixing the foundation before building on top of it. Once that work was in place, the next phase was integrating Olo's ordering system and connecting Klaviyo for email marketing. Olo doesn't have a native WordPress plugin - it's typically brought into a site through its embeddable widget or API, which behaves like a third-party component dropped into the page rather than a deeply integrated WordPress feature. On paper these look like separate projects done in sequence. In practice, doing accessibility first meant every new integration afterward had to be held to the same standard rather than introduce new gaps into a site that had just been fixed. An email integration that doesn't respect how order and customer data actually structures itself in Olo produces broken segments and bad personalization. Treating later phases as disconnected from the accessibility work that came before them is exactly how a project ends up needing to be redone. How the pieces actually connected. The ADA remediation came first and covered the whole site - the usual list of alt text, contrast, keyboard traps, form labels, and skip links - establishing a baseline the rest of the project had to hold to. The Klaviyo integration, done alongside the Olo work, meant making sure customer and order data flowing from the site and from Olo reached Klaviyo in a form that actually supported segmentation and personalization - not just a name and email address, but the data that makes an email program worth running. Why this is the right way to think about these projects. When an operations manager or marketing director is evaluating an agency for a project like this, the real question isn't whether the agency has worked with Olo, or Klaviyo, or accessibility remediation individually. It's whether they understand the right order to do the work in - fixing the foundation before building integrations on top of it - and whether they recognize that a third-party ordering widget doesn't automatically inherit the accessibility or performance standards of the site it's embedded in, and has to be tested on its own terms. What i'd tell a colleague evaluating a similar project. Ask an agency how they'd sequence a project like this - which work happens first, and why. If accessibility isn't treated as the foundation that later integrations get built on, that's worth a follow-up question, because on a real project, doing it in the wrong order usually means doing some of it twice. Andrea Straughn

PR Newswire
Sep 15th, 2026
Pilothouse Digital named winner of the 2026 Klaviyo Rising Star Americas Partner of the Year.

Pilothouse Digital named winner of the 2026 Klaviyo Rising Star Americas Partner of the Year. Sep 15, 2026, 07:05 ET Recognition marks Pilothouse Digital's excellence in 2026 Klaviyo K:Partners Awards. VICTORIA, BC, Sept. 15, 2026 /PRNewswire/ - Pilothouse Digital, an integrated growth agency for established ecommerce and DTC brands, today announced it has been named the winner of the 2026 Klaviyo Rising Star Americas Partner of the Year, presented at Klaviyo's flagship event, K:BOS, in Boston. The annual K:Partners Awards celebrate the partners helping brands get more out of Klaviyo's autonomous B2C CRM - from adopting the full platform to putting Klaviyo's agents and data to work for their customers. Winners are chosen for their innovation, creativity, and their ability to help leading consumer businesses turn customer relationships into measurable growth. Pilothouse Digital received the Rising Star Americas Partner of the Year award for rapid growth and standout contributions, especially in high-growth markets and categories, with Klaviyo's B2C CRM. "We've built an integrated growth system for ecommerce brands, and Klaviyo's B2C CRM is a core part of how that system holds together. Retention isn't a channel we bolt on at the end, it's built in from the very first order," said Madeleine Beach, Director of Marketing, Pilothouse Digital. "Our partners are helping write the next chapter of the autonomous B2C CRM, one where data, AI, and real relationships work together for every brand we serve.," said Eddie O'Brien, SVP of Global Partnerships at Klaviyo. "This year's honorees show what that future looks like: sharper strategy, faster execution, and customer relationships built to last. The K:Partners Awards celebrate the partners building that future with us." About the K:Partners Awards The K:Partners Awards highlight excellence across Klaviyo's global ecosystem of agencies, services partners, and technology partners. Winners are selected based on a combination of qualitative impact (innovation, creativity, client success stories, collaboration) and quantitative results (customer adoption, growth, and sustained performance). About Pilothouse Digital Pilothouse Digital is an integrated growth agency for established ecommerce and DTC brands. Paid media, creative, retention, and strategy sit under one team, so brands can understand and defend where their growth actually comes from. Pilothouse works with businesses between $10M and $100M in annual revenue that have hit a growth inflection point. SOURCE Pilothouse Digital