
Welltech · Cyprus
Who Are We? Welltech is a global wellness technology company with Ukrainian roots. Our mission is to build and scale wellness apps globally through state-of-th...
Who Are We?
Welltech is a global wellness technology company with Ukrainian roots. Our mission is to build and scale wellness apps globally
through state-of-the-art, tech-driven performance marketing.
We are one of the most established players in the wellness app space, and we are accelerating. Over 25.5 million people across the
world use our apps — Muscle Booster, Yoga-Go, and WalkFit — to build healthier habits, move more, and feel better every day. Every
subscription represents a real person making a real change in their life, and we take that seriously.
With 500+ people across hubs in Cyprus, Ukraine, Poland, Spain, and the UK, we combine the scale of a market leader and the drive
of a team that's just getting started.
What We're Looking For
We are seeking a talented and motivated Senior Security Engineer (x/f/m) to join our small but dedicated Security Team. In this
role, you will play a crucial part in strengthening our overall security posture, collaborate across teams and domains, and own
security initiatives company-wide.
support Welltech’s security goals.
operational processes.
standardization to enhance team efficiency and organizational impact
Continuously evaluate emerging threats, technologies, and practices, driving improvements to Welltech’s overall security maturity.
Candidate journey: ⭕️ Recruiter call ----> ⭕️ Skills assessment-----> ⭕️ Meet the hiring manager
Check out some of our products
Muscle Booster — https://musclebooster.fitness/
Yoga-Go — https://yoga-go.io/
WalkFit -http://walkfit.pro
🚀 Who Are We? Welcome to Welltech—where health meets innovation! 🌍 As a global leader in Health & Fitness industry, we’ve crossed over 220 million installs with life-changing apps, all designed to boost well-being for millions. Our mission? To improve the health of millions of people through intuitive nutrition trackers, powerful fitness solutions, and personalized wellness journeys—all powered by a diverse team of over 700+ passionate professionals with a presence across 5 hubs. Why Welltech? Imagine joining a team where your impact on global health and wellness is felt daily. At Welltech, we strive to be proactive wellness partners for our users, while continually evolving ourselves. What We're Looking For As a Senior Data Engineer, you will play a crucial role in building and maintaining the foundation of our data ecosystem. You’ll work alongside data engineers, analysts, and product teams to create robust, scalable, and high-performance data pipelines and models. Your work will directly impact how we deliver insights, power product features, and enable data-driven decision-making across the company. This role is perfect for someone who combines deep technical skills with a proactive mindset and thrives on solving complex data challenges in a collaborative environment. Challenges You’ll Meet: * Pipeline Development and Optimization: Build and maintain reliable, scalable ETL/ELT pipelines using modern tools and best practices, ensuring efficient data flow for analytics and insights. * Data Modeling and Transformation: Design and implement effective data models that support business needs, enabling high-quality reporting and downstream analytics. * Collaboration Across Teams: Work closely with data analysts, product managers, and other engineers to understand data requirements and deliver solutions that meet the needs of the business. * Ensuring Data Quality: Develop and apply data quality checks, validation frameworks, and monitoring to ensure the consistency, accuracy, and reliability of data. * Performance and Efficiency: Identify and address performance issues in pipelines, queries, and data storage. Suggest and implement optimizations that enhance speed and reliability. * Security and Compliance: Follow data security best practices and ensure pipelines are built to meet data privacy and compliance standards. * Innovation and Continuous Improvement: Test new tools and approaches by building Proof of Concepts (PoCs) and conducting performance benchmarks to find the best solutions. * Automation and CI/CD Practices: Contribute to the development of robust CI/CD pipelines (GitLab CI or similar) for data workflows, supporting automated testing and deployment. Required skills: * 4+ years of experience in data engineering or backend development, with a strong focus on building production-grade data pipelines. * 2-3+ years of experience working with AWS services (Administration of Redshift is a must), * Solid experience working with AWS services (Spectrum, S3, RDS, Glue, Lambda, Kinesis, SQS). * Proficient in Python and SQL for data transformation and automation. * Experience with dbt for data modeling and transformation. * Good understanding of streaming architectures and micro-batching for real-time data needs. * Experience with CI/CD pipelines for data workflows (preferably GitLab CI). * Familiarity with event schema validation tools/ solutions (Snowplow, Schema Registry). * Excellent communication and collaboration skills. Strong problem-solving skills—able to dig into data issues, propose solutions, and deliver clean, reliable outcomes. * A growth mindset—enthusiastic about learning new tools, sharing knowledge, and improving team practices. Tech Stack You’ll Work With: * Cloud: AWS (Redshift, Spectrum, S3, RDS, Lambda, Kinesis, SQS, Glue, MWAA) * Languages: Python, SQL * Orchestration: Airflow (MWAA) * Modeling: dbt * CI/CD: GitLab CI (including GitLab administration) * Monitoring: Datadog, Grafana, Graylog * Event validation process: Iglu schema registry * APIs & Integrations: REST, OAuth, webhook ingestion * Infra-as-code (optional): Terraform Bonus Points / Nice to Have: * Experience with additional AWS services: EMR, EKS, Athena, EC2. * Hands-on knowledge of alternative data warehouses like Snowflake or others. * Experience with PySpark for big data processing. * Familiarity with event data collection tools (Snowplow, Rudderstack, etc.). * Interest in or exposure to customer data platforms (CDPs) and real-time data workflows. Candidate journey: ⭕️ Recruiter call ➔ ⭕️ Technical call with the hiring manager ➔ ⭕️ Meet the future stakeholders ✨ Why You’ll Love Being Part of Welltech: * Grow Together: Join a culture that champions both personal and professional growth. Here, you’ll thrive as we learn, evolve, and succeed together. * Lead by Example: No matter your role, your leadership matters. Every team member is empowered to inspire and make an impact. * Results-Driven: We’re all about achieving meaningful outcomes. It’s not just about the effort, but the difference we make every day. * We Are Well-Makers: Be part of a movement that’s creating a healthier, happier world. Together, we make well-being a reality! Check out some of our products Muscle Booster — https://musclebooster.fitness/ Yoga-Go — https://yoga-go.io/ WalkFit -http://walkfit.pro
WHO ARE WE? Welltech is a global wellness technology company with Ukrainian roots. Our mission is to build and scale wellness apps globally through state-of-the-art, tech-driven performance marketing. We are one of the most established players in the wellness app space, and we are accelerating. Over 25.5 million people across the world use our apps — Muscle Booster, Yoga-Go, and WalkFit — to build healthier habits, move more, and feel better every day. Every subscription represents a real person making a real change in their life, and we take that seriously. With 500+ people across hubs in Cyprus, Ukraine, Poland, Spain, and the UK, we combine the scale of a market leader and the drive of a team that's just getting started. The Product Engineer Mindset We don’t hire people to implement specs. We hire people who can spot the right problem to solve, talk directly to product, design, data, and users to sharpen it, and ship the thinnest version that proves the bet, then iterate. If this is you, you probably: * Measure your work in outcomes, not output. A feature isn’t done when it merges; it’s done when the metric moves, or you’ve learned it won’t, and killed it. * Go to the source. You don’t wait for a perfect PRD. You sit with PMs, designers, marketers, and data, and sometimes users directly, to understand what’s actually being asked. * Own things end-to-end. From the first conversation about a problem through architecture, code, rollout, monitoring, and the follow-up experiment. You don’t hand work off at a boundary. * Have a strong bias to ship. Prototypes, A/B tests, feature flags, kill switches. You’d rather get something in front of users this week than a perfect plan in two months. * Treat AI as leverage, not a novelty. You use agentic workflows to compress the loop between idea and learning, for yourself and the team. What You’ll Own This is an ownership role, not a feature factory seat. You’ll be on the hook for outcomes across the stack, not just the code in your area: * A cross-platform foundation, end to end. Mobile, web, BFF, and infrastructure layers, built and evolved with an AI-first, agentic development approach, and held to outcomes you helped define. * Scalable foundations for health & fitness apps. React Native and modern web technologies, designed so product teams can ship and experiment faster without rederiving the basics each time. * The discovery loop with stakeholders. Working directly with product, design, marketing, and data to translate business bets into running experiments, not just tickets in a backlog. * AI-agentic workflows across the SDLC. You’ll continuously improve how the team uses AI to raise productivity, code quality, and delivery speed, and prove the impact. * Shared platform capabilities. Internal tooling, CI/CD pipelines, and AI-assisted workflows that make every engineer at Welltech faster and the product better. * Native mobile and media experiences. Video playback, streaming, and HLS, owned from native integration through user-perceived quality. * Modular, reusable systems. Backend-driven UI, white-label capabilities, and the architectural choices that let one team’s work compound for the next. * Reliable integrations. Between frontend clients, BFF services, and platform infrastructure, with you on the hook for the health of the seams. * The engineering culture. Architecture discussions, code reviews or pairing when working on trunk based development workflows, documentation, and continuous improvement, leading by what you ship and how you ship it. WHAT WE’RE LOOKING FOR Key responsibilities: * Build and evolve a cross-platform ecosystem covering mobile, web, BFF, and infrastructure layers using an AI-first, agentic development approach * Design scalable foundations for health & fitness applications powered by React Native and modern web technologies * Work directly with product, design, and marketing stakeholders to rapidly translate business needs into scalable technical solutions and experiments * Develop and continuously improve AI-agentic workflows across the full development lifecycle to increase team productivity, code quality, and delivery speed * Develop shared platform capabilities, internal tooling, CI/CD pipelines, and AI-assisted workflows that improve development speed and product quality * Work on native mobile integrations and advanced media experiences, including video playback, streaming, and HLS-based solutions * Contribute to modular architectures, reusable systems, backend-driven UI solutions, and white-label application capabilities * Build reliable and scalable integrations between frontend clients, BFF services, and platform infrastructure * Participate in architecture discussions, code reviews, documentation, and continuous improvement of engineering workflows Required skills: * Strong commercial experience with React Native and modern TypeScript-based application development * Solid understanding of full-stack architecture including mobile, web, BFF, and cloud/infrastructure layers * Experience building scalable cross-platform systems and shared application foundations * Deep understanding of software architecture, modular systems, scalability, and performance optimization * Experience working with CI/CD pipelines, automation tooling, and modern developer workflows * Strong engineering mindset focused on maintainability, reliability, testability, and fast iteration * Comfortable working in AI-assisted or agentic development environments and adopting new AI-driven workflows quickly * Experience with backend-driven UI architectures Nice to have: * Experience building white-label mobile applications or multi-brand ecosystems * Experience designing and implementing BFF (Backend for Frontend) services * Hands-on backend development experience with TypeScript (Node.js) * Experience building internal developer platforms, shared tooling, or scalable platform capabilities * Familiarity with OWASP mobile security best practices * Experience with engineering methodologies focused on rapid iteration and high developer productivity (Trunk Based Development, CI/CD mindset, TDD, BDD, XP, etc.) * Strong experience with native mobile integrations and media/video playback technologies * Hands-on experience with HLS streaming and native video player integrations on iOS and Android (AVPlayer, ExoPlayer, Chromecast, AirPlay) Candidate journey: ⭕️ Recruiter call --> ⭕️ Meet a Hiring Manager--> ⭕️ Skills assessment-->Live coding Check out some of our products Muscle Booster — https://musclebooster.fitness/ Yoga-Go — https://yoga-go.io/ WalkFit - http://walkfit.pro
WHO ARE WE? Welltech is a global wellness technology company with Ukrainian roots. Our mission is to build and scale wellness apps globally through state-of-the-art, tech-driven performance marketing. We are one of the most established players in the wellness app space, and we are accelerating. Over 25.5 million people across the world use our apps — Muscle Booster, Yoga-Go, and WalkFit — to build healthier habits, move more, and feel better every day. Every subscription represents a real person making a real change in their life, and we take that seriously. With 500+ people across hubs in Cyprus, Ukraine, Poland, Spain, and the UK, we combine the scale of a market leader and the drive of a team that's just getting started. The Product Engineer Mindset We don’t hire people to implement specs. We hire people who can spot the right problem to solve, talk directly to product, design, data, and users to sharpen it, and ship the thinnest version that proves the bet, then iterate. If this is you, you probably: * Measure your work in outcomes, not output. A feature isn’t done when it merges; it’s done when the metric moves, or you’ve learned it won’t, and killed it. * Go to the source. You don’t wait for a perfect PRD. You sit with PMs, designers, marketers, and data, and sometimes users directly, to understand what’s actually being asked. * Own things end-to-end. From the first conversation about a problem through architecture, code, rollout, monitoring, and the follow-up experiment. You don’t hand work off at a boundary. * Have a strong bias to ship. Prototypes, A/B tests, feature flags, kill switches. You’d rather get something in front of users this week than a perfect plan in two months. * Treat AI as leverage, not a novelty. You use agentic workflows to compress the loop between idea and learning, for yourself and the team. What You’ll Own This is an ownership role, not a feature factory seat. You’ll be on the hook for outcomes across the stack, not just the code in your area: * A cross-platform foundation, end to end. Mobile, web, BFF, and infrastructure layers, built and evolved with an AI-first, agentic development approach, and held to outcomes you helped define. * Scalable foundations for health & fitness apps. React Native and modern web technologies, designed so product teams can ship and experiment faster without rederiving the basics each time. * The discovery loop with stakeholders. Working directly with product, design, marketing, and data to translate business bets into running experiments, not just tickets in a backlog. * AI-agentic workflows across the SDLC. You’ll continuously improve how the team uses AI to raise productivity, code quality, and delivery speed, and prove the impact. * Shared platform capabilities. Internal tooling, CI/CD pipelines, and AI-assisted workflows that make every engineer at Welltech faster and the product better. * Native mobile and media experiences. Video playback, streaming, and HLS, owned from native integration through user-perceived quality. * Modular, reusable systems. Backend-driven UI, white-label capabilities, and the architectural choices that let one team’s work compound for the next. * Reliable integrations. Between frontend clients, BFF services, and platform infrastructure, with you on the hook for the health of the seams. * The engineering culture. Architecture discussions, code reviews or pairing when working on trunk based development workflows, documentation, and continuous improvement, leading by what you ship and how you ship it. WHAT WE’RE LOOKING FOR Key responsibilities: * Build and evolve a cross-platform ecosystem covering mobile, web, BFF, and infrastructure layers using an AI-first, agentic development approach * Design scalable foundations for health & fitness applications powered by React Native and modern web technologies * Work directly with product, design, and marketing stakeholders to rapidly translate business needs into scalable technical solutions and experiments * Develop and continuously improve AI-agentic workflows across the full development lifecycle to increase team productivity, code quality, and delivery speed * Develop shared platform capabilities, internal tooling, CI/CD pipelines, and AI-assisted workflows that improve development speed and product quality * Work on native mobile integrations and advanced media experiences, including video playback, streaming, and HLS-based solutions * Contribute to modular architectures, reusable systems, backend-driven UI solutions, and white-label application capabilities * Build reliable and scalable integrations between frontend clients, BFF services, and platform infrastructure * Participate in architecture discussions, code reviews, documentation, and continuous improvement of engineering workflows Required skills: * Strong commercial experience with React Native and modern TypeScript-based application development * Solid understanding of full-stack architecture including mobile, web, BFF, and cloud/infrastructure layers * Experience building scalable cross-platform systems and shared application foundations * Deep understanding of software architecture, modular systems, scalability, and performance optimization * Experience working with CI/CD pipelines, automation tooling, and modern developer workflows * Strong engineering mindset focused on maintainability, reliability, testability, and fast iteration * Comfortable working in AI-assisted or agentic development environments and adopting new AI-driven workflows quickly * Experience with backend-driven UI architectures Nice to have: * Experience building white-label mobile applications or multi-brand ecosystems * Experience designing and implementing BFF (Backend for Frontend) services * Hands-on backend development experience with TypeScript (Node.js) * Experience building internal developer platforms, shared tooling, or scalable platform capabilities * Familiarity with OWASP mobile security best practices * Experience with engineering methodologies focused on rapid iteration and high developer productivity (Trunk Based Development, CI/CD mindset, TDD, BDD, XP, etc.) * Strong experience with native mobile integrations and media/video playback technologies * Hands-on experience with HLS streaming and native video player integrations on iOS and Android (AVPlayer, ExoPlayer, Chromecast, AirPlay) Candidate journey: ⭕️ Recruiter call --> ⭕️ Meet a Hiring Manager--> ⭕️ Skills assessment-->Live coding Check out some of our products Muscle Booster — https://musclebooster.fitness/ Yoga-Go — https://yoga-go.io/ WalkFit - http://walkfit.pro