Senior Backend Engineer - Fraud Detection Squad

Tel Aviv, Israel | Tech Development
Not your everyday company

Lemonade completely reinvented how insurance works. As a customer-centric tech company, we created an insurance experience that is smart, instant, and delightful.

At Lemonade, you’ll be working with a group of like-minded makers, who get a kick out of moving fast and delivering great products. We surround ourselves with some of the smartest, most motivated, creative people who are filled with positive energy and good karma.

Unlike most publicly traded companies, we’re nimble and efficient. We take pride in the fact that we still think and operate like a startup. We don’t care much about titles and hierarchy and instead focus on innovation, bold moves, and challenging the status quo.

We’re built as a lean, data-driven organization that relies on a common understating of objectives and goals to provide teams with autonomy and ownership. We don’t like spending our days in meetings and we skip committees altogether. At Lemonade, there’s no such thing as going over someone’s head. We have zero tolerance for bureaucracy, office politics, and lean-back personalities.

As a Public Benefit Corporation and a certified B-Corp, we deliver environmental and social impact using our products and tech. Through our Giveback program, we partner with organizations such as the ACLU, New Story, The Humane Society, Malala Fund, American Red Cross, 360.org, charity: water, and dozens of others, and have donated millions towards reforestation, education, animal rights, LGBTQ+ causes, access to water, and more.

Awarded ‘best workplace’
Best Workplace and Best-Led Company by Inc. Magazine
“World Changing” by Fast Company
Recognized as a World Changing Idea by Fast Company Magazine
Ranked #1 Home insurance in America
Won best renters and homeowners insurance in America by US News, and others
Best Pet Insurance in America
Rated “Best Overall Pet Insurance” by Better Homes & Gardens
Rated 4.9 on the App Store
Among the highest rated apps of all time
What you’re applying for

Join our cross-functional fraud detection squad where you'll build systems that protect millions of customers while keeping the good ones flowing seamlessly through our platform.

In this role you'll:

Build fraud detection systems using microservices in Typescript (NestJS) and Ruby on Rails, running over Kubernetes to catch bad actors while keeping legitimate customers happy

Leverage our autonomous tools to manage development flow—from environment setup to production deployment—so you spend time solving fraud, not fighting infrastructure

Collaborate with data scientists, product managers, and fraud analysts in a self-sufficient squad to hit aggressive fraud prevention OKRs

Own your domain's code quality, performance, and scalability as fraudsters get smarter and transaction volumes explode

Design systems that make split-second decisions on claims and applications, balancing security with customer experience

Coach and mentor other engineers while staying ahead of evolving fraud patterns and attack vectors

Partner with our AI/ML teams to implement and optimize machine learning models that detect fraud in real-time

What you'll need:

6+ years as a backend engineer, ideally with experience in fraud detection, risk management, or high-stakes decision systems

BSc in Computer Science, Mathematics, or equivalent experience

Passionate about technology and the cat-and-mouse game of fraud prevention

Broad knowledge of modern backend frameworks, tools, and architecture—especially real-time processing and decision engines

Experience with high-scale, production-grade projects where uptime and accuracy are non-negotiable

Past contributions to open source projects (bonus points for security or fraud-related work)

Ability to work in an office environment a minimum of 3 days a week

Enthusiasm about learning and adapting to the exciting world of AI—a commitment to exploring this field is a fundamental part of our culture

Things to know…

Lemonade is an equal opportunity employer committed to diversity and inclusivity. We never discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status. If you require reasonable accommodations due to religious beliefs, pregnancy, or disabilities, let us know at any time.