Senior Frontend Developer (f/m/d)

What to expect

We are a startup digital agency, and no two projects, clients, or even days look the same.

In ecommerce we build on Shopify and Liquid and Next.js, with custom AWS microservices and apps that take Shopify well past the defaults.

On the marketing side we build highly customised sites in Next.js and React, with careful design and animation and a real focus on how the page performs and feels.

In automotive we build full platforms, from stock-car locators to configurators and more. Across all of it, we bring AI into the work through our own products.

Here nothing will be fixed. You will work across changing projects and settings, on long builds that run for months and shorter spikes to figure out how a business can actually use AI, and you will help us rethink how agency work is done.

Sound like your kind of place? Here is what we need from you.

Your competencies

Mindset

Is your goal to deliver great software, whether the problem is easy or hard? Do you push deeper than most to find the right solution, not just the first one that works? Then you are the person we need.

Responsibility

You own what you build, all the way through, not just until it ships and becomes someone else's problem. The parts that go smoothly and the parts that get messy are both yours to see through. You bring your ideas, experience and your curiosity, you use AI to build better and faster, and you stand behind what you put your name on.

Drive

By now the drive is a track record, not a promise. You have years of hard problems behind you and it shows. You understand the whole stack, or you close any gap in it fast, and the hard problems are the ones you go looking for. You are the one who takes the piece nobody else can crack and finds a way through, then leaves the ground solid enough for everyone else to build on. If the hardest part of a project is not the part you reach for, this is not your seat.

What you bring to the table:

• You work across crafts, not in a corner. You are close with developers, designers, and strategists, and you would rather build in the open than behind a wall.

• You make the team better. You speak up when something can be sharper, and you share what you learn instead of sitting on it.

• You care whether the client wins. You focus on the quality of the product and the experience, not just the ticket in front of you.

What You Can Look Forward To

What you will actually do:

We build complex, end-to-end products for both big-name and niche clients. You are the strongest technical hands on the team, the one the hardest problems land on.

Day to day, that means:

• Taking the hardest parts of the build and shipping them, the pieces others get stuck on.

• Laying the foundations: the architecture, the patterns, and the setup that let the rest of the team move fast and safely.

• Jumping in where something turned out harder than planned and getting it unstuck.

• Supporting the team on architecture calls and the technical side of client conversations.

• You’re enjoying being part of a team, not a remote desk which prefers to work in isolation most of the time.

The tech stack you will work with:

• Languages and frameworks: React, Next.js, TypeScript, HTML, CSS, Python.

  • A new language should not slow you down for long.

• APIs: REST and GraphQL, Auth (SSO, SAML, OIDC)

• Cloud: AWS, GCP, Kubernetes, Terraform

• Delivery: Creation and maintenance of CI/CD

• AI tooling: Claude, Cursor, Pi, Antigravity, plus your and our own Skills and MCP setup

Who you will work with

We are a bunch of colleagues originally from similar backgrounds who got tired of how things were usually done and set out to find better ways. That is the whole reason this company exists, and it is still what we are doing.

We are not a place of rockstars and egos. People here ask questions out loud, show rough work without flinching, and would rather help each other get something right than look clever alone. We push each other, in the good way, and we do not take ourselves too seriously while we are at it.

You would be joining that. You’ll work closely with the crafts, designers and strategists, and just as easily with the people steering the projects and the business. There is no wall between you and any of it. Take on the parts you are ready for, and when you want more, a pitch, a client conversation, a bigger call, speak up at the right moment and the door is open.

Smaller team. More ownership. Bigger work.

We are OH-SO

Digital agency, reinvented. We're an AI-native marketing & technology agency, powered by WPP — AI-enabled teams across strategy, creative, and technology, built to redefine what iconic brands are capable of.

We work in two tracks: Experiences — the ideas, platforms, and products that move and convert people — and Systems — the AI-native workflows and delivery models that make it all lean, fast, and scalable. We build tools and capability into every client relationship and earn the trust to stay — ambitious clients stay because they want to, not because they have to.

Founded in 2024 with a strategic minority investment from WPP, we're based in Hamburg, Prague, Berlin, and Munich — with access to WPP's global network of 115,000+ talent and 35,000+ tech experts.