Fullstack Engineer, Investigator Tools

Mixpeek; Paris; Hybrid; EUR 90,000 - 140,000; Full time

Benefits offered by this job

Generous cash and equity compensation

Remote-first culture

MacBook Pro delivered to your door

Home office setup stipend

Monthly meal stipend

Learning stipend

Job summary

Sardine is seeking a Full Stack Engineer to bridge backend systems and user interfaces, enabling rapid fraud detection at scale. You’ll split time between backend and frontend work, focusing on data-intensive graphs and performant search tools to empower analysts.

Join a remote-first team, work across time zones, and own features end-to-end in a fast-growing startup with strong compensation and comprehensive benefits.

Qualifications

• Strong experience with TypeScript/Node.js/React/Go in production environments.
• Experience with data-intensive applications and big data at scale.
• Background in data modeling and building production data pipelines.
• Ability to thrive in a fast-paced, high-growth startup environment.
• Ownership of ambiguous problems and turning them into scalable features.

Responsibilities

• Own features end-to-end from problem framing to UX execution and iteration.
• Translate complex backend systems into intuitive interfaces.
• Build and optimize graph-based fraud tools and efficient search capabilities.
• Collaborate cross-functionally with Design, Data, Product, and Account Management.
• Ensure system health by diagnosing and resolving issues with efficient code.

Skills

TypeScript

Node.js

React

Go

Data pipelines

Tools

Graph databases

Search tooling

Job description

Who we are:

Sardine is the leading agentic risk platform for fighting financial crime. Our integrated solution unifies data across risk teams to help organizations stop fraud in real time, prevent AI-driven attacks, and automate fraud and AML operations. Sardine’s platform is strengthened by one of the fastest-growing fraud consortiums in the market, spanning more than 6 billion profiled devices, 800 million consumers, and 3 million businesses worldwide. Leading companies including FIS, GoDaddy, Intuit, Edward Jones, ZoomInfo, and Checkout.com rely on Sardine to secure and grow trust in their products.

Our culture:

• We hire talented, self-motivated individuals with extreme ownership and high growth orientation.

• We value performance and not hours worked. We believe you shouldn't have to miss your family dinner, your kid's school play, friends get-together, or doctor's appointments for the sake of adhering to an arbitrary work schedule.

• We're a remote-first team spread across time zones, so no office to report to - work from wherever helps you do your best work. Just a couple of things to keep in mind: pay is based on where you're located, and you'll need to keep a home base in the country you're hired in. So while we love the "coffee shop today, mountains tomorrow" life, this isn't a passport-optional, work-from-anywhere-on-Earth kind of remote - think flexible within your country, not borderless.

Location:

• Remote - Germany

About the role:

As a Full Stack Engineer at Sardine, you will bridge the gap between complex technical backend systems and user-friendly interfaces to help us stop fraud in its tracks. This is a dynamic, high-impact role. On average, you will be working 60% on backend development and 40% on frontend development but are willing to help out wherever is needed. You will build out data-intensive applications, including advanced graph systems used to uncover complex fraud rings. You will own features end-to-end at a massive scale, ultimately empowering fraud analysts to uncover and investigate suspicious transactions faster than ever before.

What you’ll be doing:

• Own features end-to-end: Drive the product lifecycle from determining the initial problem space and user needs, to technical modeling, UX execution, and iterative improvements based on vague requirements.

• Translate complexity to usability: Build out complex technical systems into intuitive, user-friendly interfaces.

• Build fraud-fighting tools: Develop and optimize advanced graph systems to visualize fraud rings, and build performant search tools that help analysts rapidly identify suspicious transactions.

• Collaborate cross-functionally: Work tightly with Design, Data, Product, and Account Management teams to align engineering output with business and user needs.

• Ensure system health: Proactively diagnose, triage, and resolve bugs while writing highly efficient and performant code.

What you’ll need:

• Core technical stack: Extensive experience writing efficient, production-ready code in TypeScript, Node.js, React, Go and other server programming languages.

• Scale and data expertise: Proven experience working with data-intensive applications, complex workflows, and big data at scale.

• Pipeline proficiency: Deep background in technical data modeling and building robust production data pipelines.

• High-growth adaptability: The ability to thrive, execute, and deliver consistently in a fast-paced, high-growth startup environment.

• Independent execution: A proven track record of taking extreme ownership of ambiguous problems and independently turning them into polished, scalable features.

Benefits we offer:

• Generous compensation in cash and equity

• Early exercise for all options, including pre-vested

• Work from anywhere: Remote-first Culture

• Flexible paid time off and Year-end break

• Health insurance, dental, and vision coverage for employees and dependents - US and Canada specific

• 4% matching in 401k / RRSP - US and Canada specific

• MacBook Pro delivered to your door

• One-time stipend to set up a home office - desk, chair, screen, etc.

• Monthly meal stipend

• Monthly social meet-up stipend

• Annual health and wellness stipend

• Annual Learning stipend

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