Full-Time

Senior Data Platform Engineer

Data Engineering

Posted on 9/12/2025

Welltech

Welltech

Develops mobile health and fitness apps

No salary listed

Madrid, Spain

In Person

Category
DevOps & Infrastructure (2)
,
Required Skills
Apache Kafka
Kinesis
Requirements
  • 7+ years of experience in data engineering or backend systems, with at least 2+ years in a technical leadership or architect role.
  • Proven experience designing and building distributed data systems on the cloud.
  • Expertise in data modeling, warehousing (dimensional, denormalized, time-series), and data governance.
  • Strong experience with streaming architectures (e.g., Kinesis, Kafka) and batch ETL.
  • Deep understanding of CI/CD pipelines for data systems and infrastructure (preferably GitLab CI).
  • Excellent communication skills—able to influence stakeholders and guide technical decisions across departments.
  • Knowledge of data privacy regulations (GDPR, CCPA) and security standards.
  • A mentoring mindset—you’ve supported career growth of other engineers and improved team standards.
  • Experience balancing trade-offs between scalability, cost, speed, and maintainability.
Responsibilities
  • Lead and mentor a team of skilled data engineers, fostering a collaborative and growth-oriented environment.
  • Redesign and modernize our existing data platform using the latest tools and technologies to enhance efficiency, accessibility, and scalability.
  • Collaborate closely with data analysis and product development teams to ensure efficient, reliable, and scalable data pipelines that contribute to informed decision-making.
  • Establish and enforce data quality frameworks, governance policies, and monitoring tools to ensure high data accuracy, consistency, and reliability.
  • Ensure compliance with data privacy regulations and security best practices, minimizing risks related to data access and management.
  • Test new approaches by creating Proof of Concepts (PoCs) and conducting benchmarks to continuously improve our data platform.
  • Develop, optimize, and maintain ETL/ELT processes to ensure high-quality and consistent data, supporting the integrity of our analytics and insights.
  • Build robust pipelines for continuous integration and deployment (CI/CD), streamlining software delivery and enhancing efficiency in collaboration with development teams.
Desired Qualifications
  • Experience with additional AWS services: EMR, EKS, Athena, EC2.
  • Hands-on knowledge of alternative data warehouses like Snowflake or others.
  • Strong proficiency in PySpark for large-scale data processing.
  • Event Data Collection Tools: custom, Snowplow, Rudderstack, etc.
  • Familiarity with customer data platforms (CDPs) and real-time data processing.

Welltech is a global health and fitness tech company with Ukrainian roots that builds mobile apps focused on wellness. The company offers a suite of apps for fitness tracking, weight loss programs, yoga instruction, and intermittent fasting guidance. Users access core features via free apps and pay for premium content through in-app purchases or subscriptions, enabling personalized plans and enhanced content. The products run on mobile devices and are designed to be easy for individuals to use on their own, with revenue coming from direct-to-consumer subscriptions and purchases. Welltech differentiates itself by growing organically without external funding, expanding through multiple European hubs (five centers) and maintaining a sizable global user base with over 220 million installs. Its goal is to help people improve their health and fitness by delivering accessible, scalable wellness tools that people can use anytime, anywhere.

Company Size

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Company Stage

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Total Funding

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Headquarters

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Founded

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Simplify Jobs

Simplify's Take

What believers are saying

  • Organic growth sustains 753 employees and $25.5M revenue.
  • UK entity diversifies into electromedical equipment manufacturing.
  • Apps foster healthy habits for millions of users worldwide.

What critics are saying

  • MyFitnessPal erodes subscriptions via Under Armour cross-promotions.
  • Apple Fitness+ locks iPhone users with HealthKit exclusivity.
  • Google Fit undercuts $9.99/month with free Gemini AI.

What makes Welltech unique

  • Welltech bootstrapped to $25.5M revenue without external funding.
  • Portfolio exceeds 220 million installs across six apps.
  • Operates hubs in US, Ukraine, Poland, UK, Spain.

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Benefits

Wellness Program

Professional Development Budget

Performance Bonus

INACTIVE