Mid-level Full-Stack Developer (m/f/x)

Salary Competitive

Join a cutting-edge tech scale-up, right in the heart of Copenhagen!

Are you a versatile developer who enjoys working across the entire stack? Do you love being in a dynamic, multicultural environment where autonomy and innovation are celebrated? At Ocean.io, we’re looking for a talented full-stack developer like you to help us transform how B2B companies acquire customers using groundbreaking technologies. If you’re excited about building scalable, high-performance applications with the latest tools, we want to meet you!


What you'll be doing:

  • Full-Stack Development: Develop and maintain robust, scalable applications by working across both frontend and backend using HTML, CSS, Typescript, and Python. From designing responsive UIs to building powerful APIs, you’ll be contributing across the stack.

  • API Integration & Backend Development: Design and implement backend logic and RESTful APIs to support various frontend features. Optimize database queries, handle data processing, and ensure smooth data flow between the frontend and backend.

  • Frontend Development: Build intuitive and visually appealing interfaces using frameworks like Svelte/React. Transform wireframes and designs into functional UIs that deliver exceptional user experiences.

  • Code Review & QA: Conduct thorough code reviews, ensuring our codebase is clean, maintainable, and bug-free. Your attention to detail and commitment to quality will help us set a high standard.

  • Collaboration & Mentorship: Work closely with fellow developers to tackle complex technical challenges and share best practices. Mentor junior developers, helping them grow and succeed within the team.

  • Research & Innovation: Stay at the forefront of technology by exploring new tools, frameworks, and methodologies. We love innovation—bring your ideas and help us continuously improve our platform!

  • Project Ownership: Collaborate with project managers to plan, prioritize, and deliver features on time. Be proactive in identifying potential issues and driving projects to successful completion.


Your tech stack:

Must-Haves:

  • Proficiency in Javascript/Typescript

  • Hands-on experience with Svelte, React, Vue, or Angular

  • Experience working with a backend language

  • A creative, problem-solving mindset and a passion for innovation

  • Git for version control and collaboration

Nice-to-Haves:

  • Experience with Svelte/Sveltekit

  • Knowledge of Python

  • Familiarity with NoSQL databases like Redis, Cassandra, or Elasticsearch

  • Understanding of RabbitMQ for messaging and communication

  • Testing frameworks 


Ready to make waves with us? If you’re passionate about full-stack development and this sounds like your kind of team, we’d love to hear from you!

Perks and benefits

This job comes with several perks and benefits

Free coffee / tea
Free coffee / tea

Social gatherings
Social gatherings

Free office snacks
Free office snacks

Free friday beers
Free friday beers

Skill development
Skill development

Remote work allowed
Remote work allowed

See all 14 benefits

Working at
Ocean.io

Ahoy there! Welcome to Ocean.io - a curious, international crew based in Copenhagen (Tech Hub), San Francisco and around the world building things that actually work. We are not a big corporate machine. We are a small crew of passionate people using AI and data to change how companies find and acquire their best fit customers. Ever heard of “lookalike search”? We played a big role in bringing that concept to B2B sales and marketing. People here get responsibility early. Autonomy is expected, collaboration is natural, and good ideas can come from anywhere. If you enjoy solving real problems, working with smart people and shipping things that quickly end up in front of customers, you will probably enjoy being here.

Read more about Ocean.io

company gallery image