Senior Back-End Developer

Blockchain.com is the world's leading software platform for digital assets. Offering the largest production blockchain platform in the world, we share the passion to code, create, and ultimately build an open, accessible and fair financial future, one piece of software at a time

We are looking for Software Engineers from a variety of technical backgrounds with a proven track record in building scalable, reliable and performant systems. You will play a critical role in building financial and crypto-native products, services and APIs. As a Senior Back-End Engineer you should lead by example - driving the technical discussions, influencing the approach and making a positive impact on the team's development by advocating the best engineering practices.

WHAT YOU WILL DO:

• Design, develop, and maintain scalable backend services using Kotlin & Java
• Build and optimize APIs for seamless integration with front-end and third-party systems.
• Work with relational and NoSQL databases to manage and process large-scale data efficiently.
• Implement and maintain CI/CD pipelines for smooth deployment and testing processes.
• Collaborate with cross-functional teams to deliver secure, high-quality, and user-centric solutions.
• Conduct code reviews and mentor junior developers to foster a culture of continuous improvement.
• Work closely with design and product teams to ensure seamless integration of user-facing and server-side features.

WHAT YOU WILL NEED:

• Proficiency in Java or Kotlin
• Strong knowledge of microservices architecture, API design, and database systems (PostgreSQL, MySQL)
• Understanding of system design principles and scalable architectures
• Familiarity with Docker and CI/CD tools.
• Experience with event-driven architectures (e.g., Kafka, RabbitMQ).
• Strong problem-solving skills, attention to detail, and a commitment to code quality.

NICE TO HAVE:

• Experience with cloud platforms like GCP, AWS or Azure
• Knowledge of blockchain technologies or financial systems.
• Proficiency in frontend technologies like React

COMPENSATION & PERKS

• Competitive full-time salary based on experience and meaningful equity in an industry-leading company
• Awesome office location in the heart of Paris - working 4 days in the office is mandatory
• Work from Anywhere policy
• The opportunity to be a key player and build your career at a rapidly expanding, global technology company in an exciting, emerging industry
• Unlimited vacation policy; work hard and take time when you need it
• Performance-based bonuses paid in cash
• Apple equipment provided by the company

Blockchain is committed to diversity and inclusion in the workplace and is proud to be an equal opportunity employer. We prohibit discrimination and harassment of any kind based on race, religion, color, national origin, gender, gender expression, sex, sexual orientation, age, marital status, veteran status, disability status or any other characteristic protected by law. This policy applies to all employment practices within our organization, including hiring, recruiting, promotion, termination, layoff, recall, leave of absence, and apprenticeship. Blockchain makes hiring decisions based solely on qualifications, merit, and business needs at the time.

You may contact our Data Protection Officer by email at [email protected]. Your personal data will be processed for the purposes of managing Controller’s recruitment related activities, which include setting up and conducting interviews and tests for applicants, evaluating and assessing the results thereto, and as is otherwise needed in the recruitment and hiring processes. Such processing is legally permissible under Art. 6(1)(f) of Regulation (EU) 2016/679 (General Data Protection Regulation) as necessary for the purposes of the legitimate interests pursued by the Controller, which are the solicitation, evaluation, and selection of applicants for employment.

Your personal data will be shared with Greenhouse Software, Inc., a cloud services provider located in the United States of America and engaged by Controller to help manage its recruitment and hiring process on Controller’s behalf.  Accordingly, if you are located outside of the United States, your personal data will be transferred to the United States once you submit it through this site. Because the European Union Commission has determined that United States data privacy laws do not ensure an adequate level of protection for personal data collected from EU data subjects, the transfer will be subject to appropriate additional safeguards under the standard contractual clauses. 

Your personal data will be retained by Controller as long as Controller determines it is necessary to evaluate your application for employment.  Under the GDPR, you have the right to request access to your personal data, to request that your personal data be rectified or erased, and to request that processing of your personal data be restricted. You also have the right to data portability. In addition, you may lodge a complaint with an EU supervisory authority.