Kotlin Jobs in Web3

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. Our engineering team is building technologies that are revolutionizing the financial services industry by empowering millions across the globe. We are looking for a Mid-level Android engineer to join our growing engineering team, to rapidly create, iterate and launch high-quality software that empowers users all over the world. Ultimately, you should be able to adapt easily to meet the needs of our fast growth and the rapidly evolving crypto ecosystem. Our development team is tackling some of the most interesting problems in the crypto space while rapidly and securely scaling a distributed platform that touches millions of people a day. We want you to join us! WHAT YOU WILL DO

Build & Ship: Contribute to our industry-leading Bitcoin and crypto wallet – 📱 View on App Store. You’ll write reliable, well-tested Kotlin code, collaborate with senior engineers on architecture decisions, and help guide junior teammates when needed.  Learn & Grow: Deepen your expertise through code reviews, architecture discussions, and technical deep-dives. You’ll own medium-sized features end-to-end while continuing to sharpen your skills in mobile security and crypto. Collaborate: Work closely with designers, product managers, and other engineers to translate user stories into delightful mobile features. Own Features: Take full responsibility for feature development—planning, debugging, testing, and releasing to production—with an eye toward continuous improvement and scalability. Stay Curious: Explore the latest tools (Kotlin Coroutines/Flow, Jetpack Compose, Tink, etc.), share insights with the team, and champion best practices.

WHAT YOU WILL NEED Must-Haves

2-5 years of professional Android development experience Proficiency in Kotlin (and familiarity with Java) Comfort with Android Studio, Jetpack Compose/Views, Gradle, and Git Hands‑on experience shipping at least one consumer app to Google Play (internal testing tracks, closed/open testing, production release, Play Console management) Solid grasp of asynchronous programming (Coroutines/Flow/RxJava) and common architectural patterns (MVVM/MVI) Commitment to unit testing and automated CI/CD pipelines A growth mindset—you actively seek feedback, iterate rapidly and push yourself to improve Clear communication skills and enjoyment of working in diverse, distributed teams

Nice-to-Haves

Experience mentoring or pairing with junior engineers Personal interest in crypto or fintech Knowledge of advanced app-security or cryptography concepts Familiarity with automated UI-testing frameworks (Maestro) An app or project in Google Play or on GitHub you can demo Exposure to performance profiling and memory-management tools

HOW WE WORK

Mentorship First: Regular 1-on-1s, peer design reviews, and open architecture forums help everyone level up. Quality Matters: We test thoroughly, automate where it counts, and never compromise user trust. Iterate Rapidly: Small, safe releases get real features into millions of hands—fast. Global Mindset: Our team spans the globe; clear communication and async collaboration are core skills.

COMPENSATION & PERKS

Full-time salary based on experience and meaningful equity in an industry-leading company This is a hybrid role based in our Paris office, with a mandatory in-office presence three days per week. Work from Anywhere Policy: You can work remotely from anywhere in the world for up to 20 days per year. Budgets for learning & professional development  Unlimited vacation policy; work hard and take time when you need it Apple equipment The opportunity to be a key player and build your career at a rapidly expanding, global technology company in an emerging field Flexible work culture  

LI-Hybrid

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.