Software Engineer; Kotlin), Institutional Paris

Software Engineer (Kotlin), Institutional

Paris

is connecting the world to the future of finance. As the most trusted and fastest-growing global crypto company, it helps millions of people worldwide safely access cryptocurrency. Since its inception in 2011,  has earned the trust of over 90 million wallet holders and more than 40 million verified users, facilitating over $1 trillion in crypto transactions.

We are looking to hire a Software Engineer to join our Institutional team in our Paris office.  is a high-performance culture marked by fearlessness and hyper productivity. You are a hardworking team player with a desire to learn and grow with us, someone who can work harder, faster, and smarter to deliver tangible results and process improvements.

• Design and implement scalable, secure, and high-performance backend services in Java/Kotlin that power client-facing applications for trading, custody, and wealth management.
• Build robust APIs and microservices to support advanced dashboards, analytics tools, and mobile experiences.
• Collaborate closely with front‑end engineers, product managers, and designers to deliver seamless, intuitive experiences for sophisticated investors.
• Architect solutions for portfolio management, trade execution, settlement, reporting, and analytics tailored to institutional and private clients.
• Optimize backend systems for low latency, high throughput, and fault tolerance.
• Integrate security best practices and advanced encryption to safeguard sensitive financial data.
• Continuously improve backend performance, reliability, and development workflows.

• Strong hands‑on experience with Kotlin in backend and distributed systems development.
• Proven expertise building scalable APIs, microservices, and backend platforms for complex financial or data‑intensive applications.
• Familiarity with cloud deployments, and service‑oriented architectures.
• Knowledge of messaging and streaming technologies (NATS, Kafka, or similar).
• Solid understanding of algorithms, data structures, databases, and distributed systems.
• Knowledge of ledger systems is a strong plus.
• Passion for solving challenging technical and financial problems with clean, maintainable code.
• Commitment to quality‑driven engineering, with a strong focus on testing (unit, integration, performance, and failure recovery).
• Experience in fintech, trading, or wealth management platforms is a strong advantage.

• Unlimited vacation policy; work hard and take time when you need it.
• Unlimited books policy; order the technical resources you need or simply pick something up from our company library.
• Learning and development opportunities.
• Full‑time salary based on experience and meaningful equity in an industry‑leading company.
• Role based in our Paris office, with a mandatory in‑office presence four days per week.
• Work from Anywhere Policy:
  You can work remotely from anywhere in the world for up to 20 days per year.

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.

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