Lead Software Engineer, Klaviyo
API Team
$192-288k
3+ days a week in office
The autonomous B2C CRM
Job no longer available
The autonomous B2C CRM
1001+ employees
Job no longer available
$192-288k
3+ days a week in office
1001+ employees
Company mission
Klaviyo is the only autonomous CRM built for B2C brands. Powered by its built-in data platform and AI insights, Klaviyo combines marketing automation, analytics, and customer service into one unified solution, making it easy for businesses to know their customers and grow faster.
Role
Who you are
- Extensive experience architecting & building a wide variety of intuitive & consistent public Restful APIs
- Extensive experience consuming 3rd party Public APIs
- Solid understanding of the full stack of technologies that are needed to build and run an API from the ground up
- Passionate about creating systems that elegantly simplify complex patterns and practices
- Experience with Python, Django
- Experience with meta programming (writing programs that manipulate programs). Our API framework and Encoded Objects library (used to define schemas for complex data models) heavily leverage meta programming
- Like working on small, autonomous agile teams. Enjoy shipping code early and often in an agile fashion, pairing with product management, business stakeholders, and other engineers to craft better software
- Motivated by having ownership and leading others, excited about taking the initiative to solve tasks in collaboration with others. Have experience leading projects and groups of engineers
- Bachelor's degree or equivalent practical experience with 8 years of experience testing, developing, and launching complex software products, and 5 years of hands-on experience in software design and system architecture, with a focus on reliability, fault-tolerance, and high performance
- Proven experience with being a coach and a mentor for team members and helping them grow
- Proven record of cross team and cross functional collaboration with stakeholders across the company including engineering, product, data science, solution architecture, customer support, GTM
- Love digging into performance, scalability, and reliability issues to drive breakthrough solutions. You recognize all problems can be solved and are capable of rallying others to address business needs
Desirable
- Experience with AWS
- Experience with DRF(Django Rest Framework) and/or GRPC
- Experience with JSON:API standards
- Experience creating new applications with scalability in mind
- Experience working with both monolithic and microservices architectures
- Track record of working on high visibility projects with requirements you have to actively seek out. Desire to be judged on measurable outcomes and change process to achieve those outcomes
- Experience talking to customers and listening deeply to their wants and needs
What the job involves
- As a Lead Engineer joining the API team you can expect to be deeply involved in technical discussions across teams, building out public APIs, and growing the team
- You will have input into the team’s mission, goals, and roadmap while collaborating along-side technical product owners, product managers, and product analysts
- Together, you'll define scope and specifications while refining RFCs to ensure deliverables are met and stability is maintained
- You'll also be a key player in helping drive the narrative for the technical evolution of the overall public API space as we invest in both our current and future experiences
- The API team is responsible for expanding our API surface to enable Klaviyo’s customers and partners to build on top of Klaviyo
- Klaviyo already has APIs for storing data and sending communications, primarily for e-commerce applications, but we’re just getting started!
- We’re looking to expand our API surface to provide external developers the tools they need to solve core use cases
- This role within Klaviyo has resulted from growth and there are ample opportunities to advance given the scope of this position and the team’s central role in Klaviyo’s product
- Meet and work with a number of engineers across the company to expand our API surface across Klaviyo’s various product areas
- Advocate for building Public APIs alongside other interfaces of accessing new features such as UX and mobile. This will require early collaboration with stakeholders from various product areas within the organization during PRD (Product Requirements Document) and RFC (Request For Comments) phases
- Open up clearly-defined services through our public APIs so that developers can access these objects programmatically
- Build upon and enhance Klaviyo’s API framework foundation. This includes features such as framework support for pagination, improvements to versioning, observability, documentation, etc
- Promote sound API design patterns & standards that result in best in class Developer Experience for customers that use our APIs
- Ensure that Klaviyo data is exposed to 3rd party callers only through Public APIs
- Partner with our Go-to-Market team (solution architects, support engineers, developer advocates) to better understand issues developers are facing with our APIs to design and build solutions
- Be responsible for technical quality, teach others technical expertise and help them develop skills they need to improve within the organization
- Tech Stack:
- Python, Django, FastAPI, GRPC
- Apache Kafka, Apache Pulsar, RabbitMQ, Spark, Airflow, and other tech from the big data stack
- MySQL, PostgreSQL, Clickhouse, Redis
- Typescript, React, Babel, Jest, Webpack
- AWS, Terraform, Docker, Kubernetes, Pantsbuild, Jenkins, Argo, and other modern DevOps tools
Our take
Klaviyo is a marketing firm helping growth-focused eCommerce brands drive more sales with super-targeted, highly relevant email, Facebook and Instagram marketing campaigns. From personalised newsletters to automated emails when customers abandon their shopping carts, the marketing automation platform makes it easy for businesses to capture, store, analyze, and predictively use their own data to drive measurable, high-value outcomes.
Klaviyo's CEO, Bialecki, believes that the main problem with e-mail marketing today is that there is a divide between two kinds of tools: analytics tools that help you understand what people are doing on a website, such as what products they are considering, and messaging tools that send them a marketing e-mail. Operating primarily within the retail and eCommerce industry, Klaviyo aims to solve this by offering a tool that brings together analytics and messaging. This allows companies to bring all of their first-party data into a single platform to get a deep understanding of their customers and then activate that data to deliver highly-targeted, personalised communications through email and SMS. In the process, Klaviyo's customers get a deep understanding of their consumers.
Klaviyo is a fast-growing company mainly due to its business model - the firm offers a concrete ROI for Klaviyo’s clients if the software persuades customers to make purchases by treating different types of customers differently. An IPO in 2023 has led to Klaviyo's release of Klaviyo AI, which empowers businesses to unlock revenue-driving opportunities and deliver exceptional customer experiences across channels. Still in its early days of public listing, it will be interesting to see how Klaviyo fares in the years to come.
Freddie
Company Specialist at Welcome to the Jungle
Meet the team
Devin Bhatia, Customer Success Manager
Our mission
Create exceptional customer experiences by providing immediate and long-lasting value, while empowering creators to own their growth.Insights
4% employee growth in 12 months
Company
Employee endorsements
Opportunities to learn
"Not only we have a good stipend to spend on learning but we also have development days every quarter, where we can switch off and focus on the areas..."
Company benefits
- Private medical insurance
- Medical
- Dental
- Vision
- Lifestyle spending account
- Commuter benefits
- Modern Health - wellness platform
- Parental leave
- Company equity
- Employee stock purchase plan
- Mental health benefits
- Health savings account (HSA)
- Flexible spending accounts (FSAs)
- Employee assistance program (EAP)
- 401(k) plan with company match
- Flexible paid time off (FPTO)
- 13 company holidays
- Paid parental bonding leave
Company values
- Put customers first: We prioritize our customers > customers’ customers > team > ourselves. We empathize deeply with our customers by walking in their shoes and solving their greatest pain points. We start with what’s best for the customer, not what’s best for us, and work backwards, delivering experiences our customers will talk about.
- Win together: We’re one team, we get to know each other, we’re okay with conflict and willing to disagree and commit. We are honest, direct, transparent, and respectful. We seek and incorporate diverse perspectives and assume good intent.
- We’re 1% done: We’re just getting started – our greatest products, work, and achievements are in front of us. We have a beginner’s mindset – we see the opportunities to build and improve and have the ambition to go after them. We benchmark against the best, aim to beat them, and celebrate when we do.
- Know the score: We’re clear about what success is for each project and how it ladders to our overall success. Results are what matter. Working hard is required, but it’s not success. We use data and past performance to motivate our future strategy.
- Be meticulous in your craft: We seek to do work so good that people rave about it. We are rigorous, thorough and prepared. We are or expect to be the experts everyone in the world turns to.
- Move fast, no shortcuts: Speed matters. We set ambitious deadlines, we like short cycles and being first to market. We don’t skip critical steps or requirements to make a date. We’re comfortable living in the grey and making judgment calls to decide what’s required and what’s not.
- Drivers wanted: No passengers — we’re proactive and engaged, and if we see something wrong it’s our responsibility to fix it or raise the issue to its owner. Have a vision and make sure it’s compelling. No job is beneath us. If it needs to get done, we’re happy to pick it up. We use and spend resources like they’re our own.
- Stay hungry, stay humble: We are insatiably curious learners; our slopes are very high. If we don’t know something, we’re world- class at figuring it out. We take calculated risks and sometimes make mistakes — we’re not perfect. When we fail, we learn from it and improve going forward. Feedback is a gift, even if it hurts sometimes. We don’t tolerate brilliant jerks.
Company HQ
Dublin, Republic of Ireland
Articles
Leadership
Andrew Bialecki
(Founder and Co-CEO)Co-founder and Co-CEO. Previously CTO at RockTech, Senior Engineer at Performable, Lead Engineer at Applied Predictive Technologies and an SDET Intern at Microsoft
Ed Hallen
(Chief Strategy Officer)Co-founder and currently our Chief Strategy Officer. Previously worked in Enterprise Business Development at Google, Summer Associate at Accel-KKR and Principal at Applied Predictive Technologies.
Chano Fernandez
(Co-CEO)Chano serves as the co-CEO, leading all go-to-market functions at Klaviyo. He previously led organizations at SAP, Workday, and Eightfold.
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