Senior Backend Engineer - IoT (all genders)

tonies is the world’s leading interactive audio platform for children, with over 12 million Tonieboxes and 165 million Tonies sold globally. Our intuitive, screen-free system empowers children to learn and play independently in a safe and engaging way.

With a presence in over 100 countries and a diverse portfolio of ~1,500 Tonies across multiple languages, we continue to redefine how children experience storytelling and learning. Since our IPO in 2021, our global team of 630+ colleagues is united by a shared mission: shaping the future of play, learning, and imagination.

Senior Backend Engineer - IoT (all genders)

• **Please note, this position is remote within Germany only ***

Do you want to develop a product that is used worldwide? Do you have high standards for continuous discovery, usability and clean code? Do you challenge decisions and ideas against current requirements to ensure continuous improvement? If you answered “YES!” to these questions, we want to talk to you!

As a Senior Backend Engineer (m/f/d) you will join a talented product team dedicated to developing and maintaining the Toniecloud IoT services. Your focus will be on continuous discovery, usability, quality and security, ensuring a top-tier experience for our millions of users worldwide.

In the IoT and Control stream, you will play a central role in ensuring the seamless integration of our IoT products. You will empower our users by providing them with intuitive tools to set up and customize their devices to suit their unique needs.

What you'll do

• You take charge of developing and maintaining our Toniecloud IoT services, ensuring they meet the needs of millions of users
• Play a key role in our Toniecloud ecosystem, which includes:
• A robust django backend platform offering RESTful and GraphQL APIs
• An IoT messaging stack that processes technical diagnostic data from millions of Tonieboxes around the globe
• Maintain our commitment to reliability, ensuring our services are available 24/7, 365 days a year, and helping us achieve our 99,99% SLA
• Collaborate within a cross-functional, stream-aligned team, where you’ll champion technical excellence to deliver seamless, always-on services. You’ll also work closely with the Product Manager and team members to ensure a fantastic user experience within the app (enabling parents to set up and configure their Tonieboxes and Tonies, enabling unlimited joy for our little listeners)

What You Bring

• You have been a passionate software engineer for many years and are excited to continue improving your skills
• Track record in building or maintaining backends for IoT products
• You are fluent in at least two programming languages, one of them is Python – and you can quickly adapt to new languages when needed
• Experience with Django is essential
• Your code is lean, well-structured and easy to understand. You avoid unnecessary complexity from the outset and have a knack for solving complex problems with simple solutions
• You are familiar with database systems (ideally PostgreSQL) and use ORMs thoughtfully and efficiently
• Linux is your preferred environment and working with Git and GitLab is part of your daily routine
• Your work style is characterized by agility, teamwork, independence and creativity, especially when exploring new solutions
• You place great importance on automated tests, CI/CD, and observability
• APIs (REST or GraphQL) are like your native language
• You are comfortable communicating in English in a professional work environment
• You must be currently based in Germany.
• Last but not least: you are enthusiastic about our product and want to join us on our exciting journey!

Why Join Us?

• Global teamwork: We work together across departmental and national borders on our vision of bringing the Toniebox to every child's room in the world.
• Come as you are: This applies not only to the dress code, but to everything else as well. Because you can only give your best when you feel truly comfortable.
• Mobility: Choose the offer that best suits you – a Germany ticket for unlimited mobility, a monthly payment of fifty euros for an office parking space, a leased bicycle or a remote work allowance.
• Protection: Benefit from subsidies for employee savings plans, company pension schemes and disability insurance.
• Relaxation & Time Out: Enjoy 30 days of paid annual leave plus three additional days off, such as Carnival Monday, Christmas Eve, and New Year's Eve. After one year of employment, you can also take up to 10 "toniecation days" (unpaid leave).
• Continuous professional development: Benefit from our internal and external training opportunities as well as an individual learning budget to continuously expand your knowledge.
• Language learning and relaxation made easy: Improve your communication skills with the Babbel language learning app and find relaxation through our access to the Calm meditation app.
• Discounts: Benefit from attractive discounts on our entire tonies range.

As part of our principles, we are committed to supporting inclusion and diversity at tonies. We actively celebrate our colleagues’ different abilities, ethnicities, faiths and genders. Everyone is welcome and supported in their development at all stages in their journey with us.

We look forward to hearing from you!

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Source: Statistisches Bundesamt (Destatis), table; dl-de/by-2-0; StarIn's calculation

Listed on a job portal Oct 05, 2026

Listed on a job portal Oct 02, 2026