Data Scientist Growth Analytics

Polarsteps

YOUR EXPEDITION AT POLARSTEPS - DATA SCIENCE Over the past 10 years, Polarsteps has grown massively through word-of-mouth, thanks to our product and tech department building a top-quality user experience for all our travelers. As our data scientist with expertise in experimentation, you will sit within the Growth & Marketing department of the organization. You will be partnering with the Head of Growth, and will help drive the experimentation practices and analyses, collaborating with product, marketing, designers and engineers, to enable trustworthy decisions at scale. You will help Polarsteps use novel ways (sprt, stratified random sampling, etc.,) to increase the speed of the experimentation lifecycle and develop ways to ensure that our experiment process is the highest standard possible. With 20M+ users and ratings of 4.8 and 4.7 on the app stores and features in multiple Google and Apple showcases, we've got an impressive past. But we’re even more excited for the future, and you’ll play a crucial role in the growth and direction of Polarsteps as we grow to 100M+ users around the globe. YOUR ITINERARY What your journey at Polarsteps will look like day-to-day. * Partner with product, growth, and marketing teams to translate business questions into well-designed experiments with clear success criteria. * Design, run, and analyze experiments across product and marketing to help Polarsteps make confident, data-backed decisions at scale. * Advance our experimentation methodology (introducing techniques like SPRT, stratified sampling, and variance reduction) to help us learn faster and ship with more confidence. * Build and maintain the statistical frameworks and tooling that power our experimentation practice, from sample size calculators to automated analysis pipelines. * Present experiment results and strategic insights to senior stakeholders, turning statistical findings into clear, actionable recommendations. THE EQUIPMENT IN YOUR BACKPACK What we’re hoping you’ll bring with you. ✅ 5+ years of related industry experience in the data science and experimentation domain ✅ Worked with B2C native mobile apps ✅ Expertise in SQL, familiarity with Python, knowledge cloud data environments (e.g. AWS, Clickhouse etc.) ✅ Hands-on experience building and scaling experimentation practices, working with product managers or marketing department and have worked with statistical methods (causal inference, multi-arm bandits. reinforcement learning, synthetic data and experimentation, non-parametric methods, etc.,) in start-ups or scale-ups ✅ Are familiar with product analytics and reporting tools (e.g., Mixpanel, Amplitude, Appsflyer, Adjust, Looker, Meta Base etc.). ✅ Ability to communicate and explain data science and experimentation concepts to diverse audiences and craft a compelling story. ✅ Intellectually curious, creative, and diligent you enjoy thinking about the business as much as about the data. ✅ Focus on business practicality and the 80/20 rule; very high bar for output quality, but recognize the business benefit of "having something now" vs "perfection sometime in the future" 1ST CLASS POLARSTEPS EXTRAS Some cool things to make the journey extra sweet. * A yearly free flight or train ride to a random location! Give our Teleporter a spin here. * A shiny MacBook to work your magic on. * Hybrid working, our way. Work from home and the office, we ask everyone to be in the office 2 days a week. It’s how we stay flexible, focused, and meaningfully connected in person. * An extensive home office set-up, everything from noise-canceling headphones to a standing desk. * 30 days of vacation (for adventures or sitting on the couch, it's up to you). * Two paid Culture Days for days that are important to you but not recognized by the official Dutch calendar. * The option to switch up your zoom background by working from another country for up to 8 weeks a year. * A personal development budget for that curious mind of yours! * A pension plan to help you save for those around-the-world retirement trips. * Delicious daily team lunches. * Awesome monthly parties, as well as team trips away. * A lively office in downtown Amsterdam, with travel costs reimbursed. * Free Polarsteps Travel Books to contain all your far-flung adventures. At Polarsteps, we believe the best products are built by people as diverse as the travelers using our apps! That's why we specifically encourage people underrepresented in the tech industry to apply for a role with us. Because we believe that diversity, be it age, race, sexual orientation, physical ability, ethnicity, or gender identity, makes both the world and the workplace better. Think this is the path for you? Find out more about how we hire.

ThreatFabric

YOUR MISSION About the Job Title: Senior JavaScript Security Researcher Position: Full-time | 40 hours per week  Location: Amsterdam, Netherlands | Work From home (2-3 days per week in the office)  Salary Range: 80.000,- to 100.000,- annually  At ThreatFabric, we help the world's leading banks stay ahead of fraudsters, scammers, and cybercriminals. Our technology protects millions of users every day by detecting fraud, malware, and emerging attack techniques before damage is done. As a Senior JavaScript Security Researcher, you'll explore new browser capabilities, uncover detection methods, and turn cutting-edge research into real-world protection used at global scale. Your discoveries won't remain on a whiteboard, they'll directly help safeguard people and businesses around the world As a senior JavaScript Security Researcher, you’ll be responsible for maintaining our FRS web SDKs. Next to that you’ll be driving the new (detection) capabilities of our SDK. This includes detecting and investigating fraud patterns & trends. You’ll be working closely with Threat Analysts and Product teams to enhance fraud detection. Part of your job is exploring and experimenting with (new and upcoming) browser APIs, and research how these APIs can be used to create new and novel detections mechanism. This requires a creative and out-of-the-box mindset. Proven experience with browser and JavaScript security research is a plus.  The position  You should have the ability to research, develop, manage, test, and deploy browser-based JavaScript code in the following areas:  * Latest browser fingerprinting tactics * Ability to research the underlying working of browser APIs * Ability tocome up withnovel to use these APIs for detection; this includes looking for anomalies, side channels, and other side effects of these APIs * Creating a production ready web SDK Your daily work is to collaborate with the behaviour and device risk analytics tech team including backend engineers, data scientists and product managers.  You are expected to be able to work with minimal guidance as lead research and JavaScript engineer.   Since you will be working in a startup environment, passion and motivation are key to success and pleasure at work.  Responsibilities  Your key responsibilities will include:  * Maintaining our FRS web SDKs * Driving the new (detection) capabilities of our SDK * Detecting and investigating fraud patterns & trends * Working closely with Threat Analysts and Product teams to enhance fraud detection * Exploring and experimenting with (new and upcoming) browser APIs * Researching how these APIs can be used to create new and novel detections mechanism What We Offer * A 12-month employment contract with the intention to extend. Subject to mutual satisfaction, this may lead to a permanent position. * A competitive salary that reflects your skills and experience with a salary range between:80.000,- to 100.000,- annually. * 25 Holidays per year * 8% holiday allowance (included in annual salary). * A Pension Scheme. * A stimulating and supportive work environment that encourages growth and development. * The opportunity to make a meaningful impactina rapidly growing tech company. * Flexible Remote / Hybrid work from home options to promote work-life balance. * Flexible working hours. * ActiveThreatFabric events and FitFabric bootcamps.  * Active knowledge sharing huddles. YOUR PROFILE Skills and qualifications  * 8+ years relevant experience in JavaScript and or framework development.  * Familiar with Browser APIs including APIs needed for browser, mouse, keystroke, scroll dynamics.  * Able to work with Open Source development workflow using git.  * Excellent debugging and problem-solving skills.  * Knowledge of Docker is a nice to-have. * Proficient English writing skills to document work and communicate project status. * Be a team player and feel comfortable communicating and collaborating with other team members. Creativity and Innovation: * Generates and implements creative, innovative solutions to complex problems. Problem-Solving: * Communicates solutions clearly and concisely. * Possesses a scale-up mentality where flexibility and adaptability are key. Communication and Interpersonal Skills: * Communicates technical concepts effectively to diverse audiences. * Thrives in collaborative environments, fostering teamwork and cooperation. * Demonstrates empathy and understanding in interpersonal interactions. Continuous Improvement: * Actively seeks opportunities to enhance workplace practices and product quality. * Embraces a mindset of ongoing learning and development to stay ahead of industry trends. Information Security, Business Continuity & Privacy: * Proactively engages in maintaining information security and privacy standards. WHY US? About ThreatFabric At ThreatFabric, we're not just shaping the future of cybersecurity - we're defining it. With our headquartered in the vibrant city of Amsterdam, ThreatFabric stands at the forefront of combating online fraud, mobile malware, and threat intelligence.   Costly online scams, fraud and malware attacks are rampant. Victims’ life savings are stolen, but so are their confidence and trust. On top of this, financials' brand and reputation are damaged. Many lack online visibility to trigger prompt reaction, and the industry faces regulatory reimbursement pressure.   This is why ThreatFabric provides web and mobile security: scam, fraud and malware detection and prevention, and threat intelligence to be proactive. We help the biggest financial brands protect their customers and their reputation in a world where attacks escalate, and trust erodes.   Join Our Dynamic Team Ready to dive into the heart of innovation? Our team is a melting pot of talent, passion, and expertise from all corners of the globe. Behind ThreatFabric's success lies a diverse ensemble of technical experts, data scientists, and thought leaders united by a passion for innovation. With a global perspective and a collaborative spirit, our team leverages innovative technology and thousands of data points to deliver security solutions.   As a scale-up, we embrace a scale-up mentality where flexibility, adaptability, and a dynamic approach are essential.   Our Core Values At ThreatFabric, our culture is defined by three guiding principles: * One Team: Collaboration fuels our success as we work together to tackle complex challenges. * Continuous Excellence: We're committed to pushing boundaries and exceeding expectations in everything we do. * Customers at the Heart: Our customers are not just clients — they're partners. Their success is our priority. Interested? Are you as excited about this opportunity as we are? We can't wait to hear from you! Apply through the Personio link, and let's make innovation happen together! We aim to fill this vacancy in 2025.   What's next? So, you've hit send - what happens now? First, we'll do a screening to ensure we're a good match. If all goes well, you'll be invited for an initial chat with us. Then, there's a second interview, and we may include an assessment to better understand your skills. Ready to take the plunge?   Please note: Pre-employment screening is part of our selection proces, together with an technical assessment. We do not accept unsolicited resumes from recruiters or employment agencies.

Databricks

REQ ID: CSQ427R198 Location: Amsterdam, Netherlands - Remote   MISSION The Forward Deployed AI Engineering (AI FDE) team is a highly specialized customer-facing AI team at Databricks. We deliver professional services (PS) engagements to help our customers build and productionize first of its kind AI applications with a focus on GenAI. We work cross-functionally to shape long-term strategic priorities and initiatives alongside AI/ML Product, Research, and Engineering. We are looking for a world-class leader to lead and grow our EMEA AI FDE team. In this role, you will lead customers on their AI/ML transformation with Databricks, push the boundaries of our product, recruit and develop top data scientists/machine learning engineers, and manage a portfolio of key EMEA accounts. You will report directly to the Head of EMEA AI FDE. This role can be remote in Europe, but the preference is for candidates to be near a major office location such as London, Amsterdam, Paris, or Munich. Candidates should expect to travel at least once a month. THE IMPACT YOU WILL HAVE: * Lead and scale a world-class AI/ML professional services team, including hiring, mentoring, and building a team structure to support long-term growth and execution at scale * Develop and expand executive relationships with EMEA customers and partners (including VP+, CIO/CDO-level stakeholders), acting as a trusted advisor during complex technical engagements and AI transformations * Align with Field Engineering and Sales Leaders to define joint strategies for strategic accounts and ensure strong delivery coordination across functions * Lead strategic AI PS initiatives, practice development, and standardized delivery processes; design scalable engagement models and reusable solutions for repeatability across the global team * Shape cross-functional collaboration by influencing Product, R&D, and GTM—ensuring voice-of-customer insights and delivery learnings help inform the product roadmap and GTM strategy * Own OKRs for AI-services led accounts, revenue, utilization, and public references * Represent Databricks as a thought leader in AI/ML WHAT WE LOOK FOR: * Extensive experience managing, hiring, and building a team of high-performing data scientists/ML engineers and leaders, with a track record of scaling organizations through developing scalable processes and cultivating leaders * Ability to scope, guide, and sell technical engagements, manage escalations, and ensure successful delivery in enterprise environments * Deep technical expertise in ML, GenAI, and data science, and curiosity to continue to stay up-to-date in this ever-changing field * Experience leading teams building cutting-edge production ML solutions in cloud environments (AWS, Azure, or GCP) * Proven success developing strategy with senior executive stakeholders to define program-level goals, align technical vision, and build trust throughout complex enterprise engagements * Demonstrated experience in cross-functional leadership roles, collaborating with Sales, Product, and GTM teams to drive business impact through AI/ML * “Company-first” mindset * Graduate degree in a quantitative discipline (Computer Science, Engineering, Statistics, Operations Research, etc.) or equivalent practical experience Preferred: * Experience in a customer-facing consulting or professional services leadership role * Experience working with Databricks About Databricks Databricks is the data and AI company. More than 10,000 organizations worldwide — including Comcast, Condé Nast, Grammarly, and over 50% of the Fortune 500 — rely on the Databricks Data Intelligence Platform to unify and democratize data, analytics and AI. Databricks is headquartered in San Francisco, with offices around the globe and was founded by the original creators of Lakehouse, Apache Spark™, Delta Lake and MLflow. To learn more, follow Databricks on Twitter, LinkedIn and Facebook. Benefits At Databricks, we strive to provide comprehensive benefits and perks that meet the needs of all of our employees. For specific details on the benefits offered in your region click here. Our Commitment to Diversity and Inclusion At Databricks, we are committed to fostering a diverse and inclusive culture where everyone can excel. We take great care to ensure that our hiring practices are inclusive and meet equal employment opportunity standards. Individuals looking for employment at Databricks are considered without regard to age, color, disability, ethnicity, family or marital status, gender identity or expression, language, national origin, physical and mental ability, political affiliation, race, religion, sexual orientation, socio-economic status, veteran status, and other protected characteristics. Compliance If access to export-controlled technology or source code is required for performance of job duties, it is within Employer's discretion whether to apply for a U.S. government license for such positions, and Employer may decline to proceed with an applicant on this basis alone.