Senior Backend Engineer, New Support Instant Messaging Platform

Remote or Helsinki, Finland

Do you want to build something completely new from the ground up? Are you ready to take part in defining a direction for a completely new initiative and face a challenge to build a new real-time solution for 10M+ users?

If you said “Yes, yes and definitely yes”, then come and join our new team on a mission to build a completely new instant messaging platform for our support.

World-class customer service is one of the cornerstones of Wolt 💙  The quality of communication between our team and our customers and partners is essential as it determines how fast and accurately we can respond to inquiries and solve emerging problems. At Wolt, we currently serve over 10M+ monthly users and they love to chat with us, a lot. 

You ​​will be one of the first joiners in a shiny new team with a remarkable opportunity to improve our already world-class support experience. Since it is early days in the project, you will play an integral part in defining the way the team will work, participate in architecture and ideation discussions and decide on tools and best practices. You’ll collaborate closely with the designer, product manager and other engineers in your team.

We’re obsessed with high ownership teams at Wolt, which means you’ll get to work in a culture of freedom and accountability. Our teams are in charge of their own roadmaps, how they build services and products, and how they solve challenges from new features to core scalability of their solutions.

You can be based in our tech hubs Helsinki or Berlin or work entirely remotely elsewhere in Finland, Germany, Denmark, or Estonia now and in the future! 🌍  Read more about our new remote set-up here.


Our humble expectations

Building a brand new support chat tool is an exciting and challenging problem. We are looking for someone eager to create a scalable, highly available real-time messaging service for our 10M+ users. Challenges include real-time messaging, ensuring that messages are reliably stored and delivered, designing and building a conversations inbox with prioritization, attachment, and push notification systems. That’s just to start with.

The potential tech stack that we are considering is MongoDB for storing general metadata and messages archive (in the future potentially distributed KKV database for storing archive data), Node.js + Fastify (optional) for iterating quickly and building a REST API and other services, also piloting Elixir + Phoenix for building a scalable real-time messaging system.

Experience with high traffic and high-performance projects and good knowledge of NoSQL databases like MongoDB, Cassandra, Riak, or similar would be highly valuable. Great if you consider yourself flexible enough to work with different languages and technologies depending on the problem we face, but in the beginning, at least strong Node.js skills would be valuable for this role.

It is also a bonus if you have experience working with real-time projects like chats, multiplayer games, signaling servers for voice/video communications, or breaking news providers so you can demonstrate how to build reliable clients and backends to serve our customers needs.

We value an attitude of constant improvements and also the ability to create new things from scratch. An entrepreneurial mindset of taking ownership of what you've built is a must.

Join the team with a huge opportunity to make an impact!

Next steps

Join us for an exciting journey!

The compensation will be a negotiable combination of monthly pay and Wolt stock options. The latter makes it exceptionally easy to be excited about our company growing and doing well, as you'll own a piece of the pie.

For any further questions about the position, you can turn to Product Talent Acquisition Partner Noora Markoff at noora.markoff(at) 

About Wolt

Wolt is a technology company that makes it incredibly easy to discover and get the best restaurants, grocery stores and other local shops delivered to your home or office. Wolt works together with over 52,000 restaurant and retail partners as well as with over 110,000 courier partners across 23 countries and 210 cities.

Our apps (iOS and Android) have the industry’s highest reviews, largely because of our customer-centric approach to how we build our products and operations. For example, our customer service team responds in a matter of seconds, in the customer’s own language.

We’ve raised more than €707M in financing from renowned U.S. and European based investors, such as ICONIQ Capital, Tiger Global, DST, Prosus, KKR, Coatue, 83North, Goldman Sachs, Highland Europe and EQT Ventures & EQT Growth, among others. We've also been fortunate enough to receive some appreciation and recognition for our hard work along the way: Apple selected Wolt’s app as their Editors' Choice, Wired named the company one of the "Hottest Startups in Europe," Forbes included our CEO Miki Kuusi on its 30-under-30 in Consumer Tech list, and the Nordic Startup Awards named Wolt Company of the Year.

In 2020, the Financial Times named us Europe’s second fastest growing company. We’re still expanding rapidly and are looking for more talented individuals to join us. If you are passionate about cutting-edge technology, great food, and making an impact in your city, then Wolt just might be for you.

Wolt is more than just a food and retail delivery operation – in fact we are built upon a solid foundation of state-of-the-art technology. Our internal tooling enables us to ramp up new cities efficiently and provide excellent customer service, our own logistics platform allows us to optimise our couriers' work to get you the food you want as fast as possible, and our restaurant platform allows restaurants to offer exciting food experiences for our customers in an optimal way.

We work in small teams with high ownership, with each team focusing on a key area of the Wolt product stack. Each and every one of our product team members has a say in where we are going and what solutions we implement. We work with a passion, but we haven't forgotten how to have fun along the way!


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