Senior Backend Engineer

You’ve built backend systems that scale, worked with complex integrations, and you're ready to take ownership of a key part of a growing product? Then this is your next move.

We're looking for a Senior Backend Engineer to join our Integrations Team – a cross-functional group building and maintaining the backend services that power our third-party integrations. You’ll help us make sure our product plays well with others — from communication tools and enterprise systems.

In this role, you won’t just write code — you'll help shape architecture, mentor others, and drive how we design, build, and operate our services in both cloud and private cloud environments.

We’re looking for someone who understands what it means to take ownership in a collaborative team, who wants to work closely with product and design, and who cares about scalable systems and clean APIs. It is your chance to enter an already grown and successful company while being able to still leave your visible footprint.

Haiilo is a leading employee communications and engagement platform that empowers companies to foster a more connected, engaged, and aligned workforce. Our solutions enable businesses to streamline internal communications, enhance employee advocacy, and boost overall company culture. We make it easy for over 1000 organisations to share important information, measure engagement, and amplify employee voices.

Please note : For this role, we are looking for candidates who are already based within the European Union (or EFTA countries) and who have valid work authorization to work for a Germany-based employer. Unfortunately, we are not able to provide relocation or visa sponsorship for this position.

What we’re looking for :

• Your background : You should have a minimum of 5 years of development experience and deep knowledge of Java and Spring Boot and how to build scalable services with them
• Tech skills : Experience working with Docker, cloud-native architectures and deployment, strong understanding of databases (both SQL and MongoDB), experience with TypeScript, and a working knowledge of Angular
• Your expertise : You know what it means to own a product : from gathering requirements, building features, testing, shipping, and keeping it running smoothly
• Your approach : You care about writing clean, maintainable code — following best practices like testing, static code analysis, monitoring, and more
• Teamwork : A team player, who takes responsibility for what they do and who is able to collaborate and share knowledge with excellent communication skills, ideally but not necessary also in German
• Knowledge-sharing : We welcome your ideas and expertise to enhance our products. Your contributions will help integrate our product with the digital landscape of our customers
• Bonus points : We value our hybrid working model. Ideally, you’re based in or near Hamburg and can join us in the office about twice a week — because sometimes the best ideas happen over coffee, not just on calls.

We encourage you to apply even if your profile does not yet meet all the requirements for the position. At Haiilo we support your personal development as well as your individuality, no matter what background you have.

What you’ll do :

What we offer :

👩🏼‍💻Remote / hybrid role :  We value flexibility and teamwork. If you live within a commutable distance from one of our office locations, we require you to work on-site at least one day per week, with Wednesdays as the designated in-office day. While Wednesday is the minimum, we recommend spending 2 (or more) days in the office each week. For those further away, we look forward to seeing you two days per month during our team events to foster collaboration and team spirit

🎉Company Vibe :   We value spending time together, so you’ll get to join regular team socials, themed afterworks (e.g. Pride Month, Cultural Awareness Month, etc.), in-person workshops, and our annual company week in Hamburg 🥳

🚀Growth :  At Haiilo, we are passionate about personal and professional growth. Our leadership is dedicated to helping you improve every day, through individual and group workshop sessions, financial support for training, conferences, books, etc. and external learning resources (e.g. access to Blinkist)

🌴Time off :  Depending on your location, we offer up to 30 vacation days to take some well-deserved time off. Our employees in all locations get 2 annual company-wide self-care days on top of the normal vacation days (because we love what we do, but we also love a healthy work-life balance!)

🌟Health & wellbeing :  To promote physical and mental wellbeing, we not only offer health insurance for all locations and a discount for sports memberships but also access to Nilo.health. ’Cause healthy employees = happy employer!

🌏Sustainability :  We only have one planet : We understand the importance of sustainability. We are a carbon-neutral company, our merch is sustainable and we offer exclusive discounts for sustainable brands through FutureBens

🫂Diversity & Inclusion :  We are committed to a diverse and inclusive environment. As an international and multicultural team with different skills, ideas and experiences, we actively work to represent and promote diversity in the company