Senior Full Stack Engineer

Company Info
Barcelona, Spain

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Company Profile


Senior Full Stack Engineer



Job ID:


Job Description:

Olyn empowers ownership and identity in a new era - one in which disruptive commerce and economic models are changing how we consume, physical and digital universes are converging, technology is democratizing new ways to build identity and wealth, and more.

Our technology enables every player through the API to build a post-purchase experience for consumers through the asset registry. Olyn works with brands, merchants, and payment providers to make it easy for people to hold up an inventory of owned assets and manage, interact, connect and transact those.

Who are we?

Olyn team members are humble and curious !! Entrepreneurs at heart, builders, and tinkerers who share a passion for bringing creators and owners closer demystify the new internet technology and tap its potential to create change in the world.

Our greatest strength is our team. At Olyn personal autonomy and professional growth are encouraged.

The company is USA-based with a global presence operating from San Francisco, New York, and Barcelona.

Our culture?

Regardless of where you came from, what you studied, or who you used to work for, everyone requires a high level of creativity and strategic thinking on complex issues. Everyone is skin in the game - We’re all driven by an insatiable thirst for learning and development, and that’s what brings us together.

Your responsibilities:

  • Compile and analyze data, processes, and codes to troubleshoot problems and identify areas for improvement
  • Collaborating with the front-end developers and other team members to establish objectives and design more functional, cohesive codes to enhance the user experience
  • Recording data and reporting it to proper parties, such as clients or leadership
  • Participating in continuing education and training to remain current on best practices, learn new programming languages, and better assist other team members
  • Taking lead on projects, as needed
  • Meeting with Development Managers to discuss software projects
  • Conducting feasibility studies for upgraded software systems
  • Assigning tasks to junior developers such as coding, testing, debugging, and analytics
  • Reviewing updated software systems

What we’re looking for:

  • At least 5 years full-stack development experience
  • Extensive knowledge in JavaScript and Typescript (experience in frameworks such as React and Next.js)
  • Proficiency in CSS and HTML (knowledge and experience building accessible webpages compliant with WAI-ARIA)
  • Cloud architecture, security, and compliance experience
  • Infrastructure-as-Code (IaC), Terraform
  • OpenID Connect, OAuth 2.0, Identity Providers
  • REST APIs, API Gateways
  • Agile, Scrum, CI/CD
  • Knowledge in Python
  • SQL (eg: MySQL, Postgres) and NoSQL databases (eg: MongoDB)
  • Good understanding and use of Open Source Software
  • Git, Github
  • Knowledge in Rust. Experience with Solana rust SDKS is good
  • Experience and good knowledge on Solidity
  • Familiar with good web3 development security practices
  • Understanding in EVMs and decentralized technologies
  • Mandatory professional level of English

What we offer:

  • Flexible schedule, remote work at a dynamic, young, fast-growth startup
  • The opportunity of working with bleeding-edge technology
  • An opportunity to leverage bleeding-edge technology and industry-leading development practices
  • Close collaboration with leading projects in the space and across the ecosystem

Interested in joining us?

To apply for this role, send your CV to with the subject line: Senior Full Stack Engineer.

Please share with us your GitHub repository link or any link to your previous work.