Senior Backend Engineer

Who Are We?We are Welltech — a global company with Ukrainian roots and a powerful mission: to move everybody to start and stay well for life. Today 25.5 million users have trusted Welltech to help them build healthy habits — a testament to the real value our innovative, engaging wellness solutions deliver every day. With five hubs across Cyprus, Ukraine, Poland, Spain and the UK and a diverse, remote-friendly team of 700+ professionals, we continue to scale rapidly. Our innovative apps — Muscle Booster, Yoga-Go and WalkFit — empower millions to transform their lifestyles and unlock their personal wellness journeys.Welltech is where your impact becomes real. And our values clearly attest to that: we grow together, we drive results, we lead by example and we are well-makers.If this looks like you and you thrive in a fast-paced environment, you'll fit right in at Welltech. Let's build wellness for millions together.What We're Looking ForWe are seeking a product-minded, impact-driven Senior Backend Engineer with strong experience in Domain Driven Design, cross-functional product development and Developer Productivity. In this role, you'll collaborate with product, engineering, and data teams in the development of our Yoga-Go app. You'll be an advocate for highly iterative development approaches, data-driven decision-making in your team, fueling our mission to bring health and wellness to millions.Key Responsibilities:Cross-functional collaboration: Work closely with high levels of engagement with product managers, designers, software engineers, content producers, data experts, and infrastructure teams.Mentor & lead by example: Provide guidance to team members, lead team level product and engineering initiatives, influence coding standards, support your team in making critical decisionsBe a champion of Engineering Excellence: Advocate for and implement best engineering practices, foster a learning culture, and influence strategic technical decisions in your team. Ensure scalability, performance, and reliability of systems owned by your teamRequired Skills:Strong product mindset that creates business value: Proven ability to drive the building of successful products and/or platforms used by product teams, working closely with Product Managers, Designers, Domain experts to create value for customersDomain Driven Design: comprehensive system design skills with proven impact building new and refactoring existing large-scale systems powering customer-facing productsSolid technical foundation: Extensive hands-on experience in backend engineering, with deep expertise in both relational and non-relational databases, as well as AWS infrastructure (e.g., Lambda, API Gateway, SQS, SES, CloudFormation, CloudWatch).Strong Python expertise: Proven track record in building efficient, scalable, and reliable backend systems using Python.System-level impact: Track record of influencing the technical direction of your team and of effective collaboration with adjacent teams, with the ability to highlight risks, trade-offs and propose efficient solutionsEngineering culture excellence and Agent of change: Demonstrated ability to shape and elevate engineering culture, methodologies, and best practices in your teamDeveloper productivity: Experienced in maximising developer productivity through the right technical choices, highly iterative development practices to achieve high pace of data-driven experimentationEnd-to-end ownership and dealing with ambiguity: You thrive in ambiguous environments and get excited about figuring out solutions to complex problems, and taking a leading role in executing on them.Ready to make a transformative impact on global wellness? Join us at Welltech and help millions of users lead healthier, happier livesCandidate journey Recruiter call --> Live code review --> System Design Interview --> Meet the Hiring ManagerWhy You'll Love Working at Welltech: 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 realityCheck out some of our productsMuscle Booster — https://musclebooster.fitness/Yoga-Go — https://yoga-WalkFit -