Mobile Engineer (f/m/d)

Thermondo GmbH; Berlin; Hybrid; EUR 70,000 - 90,000; Full time

Benefits offered by this job

Modern office in the heart of Berlin

Work from home – up to 3 days a week

Urban Sports Club membership

20% employer contribution to pension and disability insurance

Urban Sports Club

Corporate Benefits

nilo.health

Employer pension contribution

Job summary

A climate technology company in Berlin is seeking a skilled Mobile Engineer to contribute to the development of native mobile applications, focusing on Android. You'll develop high-quality features, collaborate on mobile architecture, and drive the full software development cycle. Ideal candidates are proficient in Kotlin and have a proactive approach to managing tasks. A passion for climate tech and experience with mobile development workflows will make you an ideal fit for this team focused on innovation and efficiency.

Qualifications

• 3-5 years of hands-on experience in native mobile development.
• Proficient in native Android development (Kotlin) with a focus on modern architecture.
• Ability to manage tasks effectively and work independently.
• Knowledge of API interactions and system data flows is advantageous.

Responsibilities

• Develop, test, and maintain high-quality features for Android/iOS applications.
• Implement technical designs for mobile architecture focusing on performance.
• Collaborate with backend and platform teams for feature integration.

Skills

Native Android development (Kotlin)

Mobile architecture best practices

Collaborative integration with backend teams

Self-management and task prioritization

API interactions

Tools

Kotlin Multiplatform Mobile

CI/CD pipelines

Kafka or SQS/SNS

Job description

We're looking for

At thermondo, our mission is to decarbonize every home, and technology is our primary lever for change. We are disrupting a massive industry bogged down by legacy systems and manual work. This is where you come in. We build the intelligent software and automation that gives us a decisive edge, allowing us to operate at a scale and efficiency our competitors can’t match. We are looking for a skilled and motivated Mobile Engineer (f/m/d) to contribute directly to the development of our native mobile applications, with a strong focus on Android, and multi-platform solutions. This role is ideal for a hands‑on engineer who is eager to grow their technical scope, take ownership of software development, and contribute to both mobile and adjacent full‑stack systems.

If you enjoy this

• Develop Native Mobile Features. You will develop, test, and maintain high‑quality features for our native Android/iOS applications (Kotlin Multiplatform Mobile), focusing on efficient UI implementation, state management, and robust data integration.
• Contribute to Mobile Architecture. You will implement technical designs, focusing on best practices for performance tuning, offline/online capabilities, and stability in our mobile applications.
• Collaborate on Integration. You will collaborate closely with backend and platform teams to ensure reliable integration of mobile features.
• Take Ownership of Tasks. You will take ownership of assigned features and tasks from definition to deployment, translating requirements into technical implementation plans.
• Support AI Implementation. You will implement and support patterns for integrating pre‑defined LLM services and AI‑native features into the mobile application codebase.
• Improve Development Practice. You will contribute to the improvement of mobile development workflows, participate in code reviews, and share knowledge within the engineering team.

And recognise yourself here

• Experienced: You have 3‑5 years of hands‑on experience in native mobile development, preferably within a fast‑paced product environment.
• Mobile and Growth Mindset. You are proficient in native mobile development and eager to grow into a versatile full‑stack contributor.
  • You are proficient in native Android development (Kotlin) and modern Android architecture.
  • You have experience with or a strong willingness to learn and contribute to our future iOS application.
  • You are comfortable reasoning about API interactions and system data flows.
  • Python knowledge is a strong bonus and an asset for contributing to our internal systems.
• Self‑Driven: You are capable of managing your tasks and prioritizing effectively, seeking guidance when necessary but driving implementation independently.
• Pragmatic: You focus on delivering reliable, maintainable solutions and know when to use existing technology versus learning new tools.
• Strong Collaborator: You communicate technical challenges clearly within the team and contribute effectively to technical documentation.

Bonus points

• Production AI: Familiarity with concepts like prompt engineering.
• Mobile DevOps: Hands‑on experience improving CI/CD pipelines, automated testing, and build/release processes for mobile apps.
• Event‑Driven Systems: Experience working with asynchronous patterns and message queues (like Kafka or SQS/SNS) for reliable data exchange with mobile clients.
• Legacy Migration: Experience contributing to the modernization or refactoring of existing application codebases.
• A passion for climate tech. You’re motivated by our mission to decarbonize homes and are excited to apply your skills to a problem that matters.

What we have to offer

• Join a team of Product Managers, Software Engineers, Designers, Data and Salesforce people who are excellent in their craft and are happy to share their knowledge and help you grow alongside them.
• Our team is using the latest frameworks and is working with a modern tech stack to build powerful products for our customers, craftspeople, and internal teams.
• We offer a challenge with purpose – the better our tech, the more people will live climate‑neutral and the better the world becomes for future generations.
• We offer a fantastic culture in the tech team and beyond.
  • Modern office in the heart of Berlin
  • You can bring your dog one day/week
  • Work from home – up to 3 days a week
  • You can lease a job bike
  • You receive an Urban Sports Club membership
  • Corporate Benefits at more than 100 partners
  • nilo.health membership
  • 20% employer contribution to your pension and disability insurance

About us

Every application is welcome here – regardless of gender, nationality, ethnic and social background, religion, ideology, disability, age, sexual orientation or identity. We are convinced that everyone is valuable and deserves a fair chance.

Software has always been part of thermondo’s DNA. We have been the first to digitize trade a decade ago. Today, our proprietary software enables 800 thermondinos to scale the heating transition in Germany. But we want more. We want to enable fully digitized and smooth customer journey ensuring that all processes are coming together: commercial funnel, procurement, product, supply chain, project management, finance, dispatch, HR planning as well as customer facing offerings for maintenance and home energy management.

Our product & tech teams in Xberg – the heart of Berlin – are a highly diverse and multicultural bunch. They make sure that we can make a difference and scale the energy transition in Germany and work closely together with all departments.

Join our product & tech teams and pave the way for climate neutral living.

Your application process

• An initial interview with your Talent Acquisition partner, Alex
• If we are both on the positive side, you will talk to our Sr. EM, Stas
• After this stage, you will undergo some technical assessments
• Then, you will have the opportunity to meet with your to‑be teammates.
• Finally, Become a thermondino!

Here we go

Is this exactly the challenge you are looking for? Then don’t wait any longer and apply to us. We look forward to getting to know you!

Hier kannst Du mehr über thermondo und Deinen Job erfahren