Junior Java Engineer

Listed as a remote role based in Warsaw, Mazowieckie, Poland. Unicorn Foundations: At Cosmose AI, we’re building smart, innovative technology that’s redefining digital marketing and content distribution. Since launching in 2014, we’ve gone from transforming offline shopping to powering personalized content experiences through AI. Founded by Miron Mironiuk, our journey began with one bold idea - and it has grown into a feature that caters to what people care about most, right from their lock screens. Exceptional Engineering: Our engineering team is far from average; it's a powerhouse of talent. Comprising former FAANG employees and programming champions, they bring deep expertise and a shared commitment to building world-class products. Our strength lies in engineering solutions that leverage the power of AI, Data, and distributed computing. We thrive in a fast-paced startup environment, where agility, creativity, and quality drive everything we do. Global Presence, Local Innovation: Cosmose AI is a global company with a presence in 8 countries, transforming content engagement through cutting-edge technology. Our flagship product, KAIKAI Lock Screen, delivers AI-powered, personalized content to users worldwide, unlocking new and exciting opportunities for product placement. We are looking for an excellent Junior Java Engineer to provide the foundational technology for our business by building our backend services , while accounting for the challenges of scaling to millions of weekly users . We’re Looking For Someone Who Dreams Big: ambitious, passionate, and out to achieve MASSIVE goals Customer-centric: We care about our customers and strive to provide them with the best solutions Celebrates both Success & Failure: Rejoicing the wins but also reflecting, learning & improving proactively when there are defeats Honesty and Integrity: We appreciate respectful feedback Problem Solver: You’re a fixer and not a complainer Actionable: Work and make SMART decisions fast with conviction What You’ll Do Develop software responsible for data processing and delivery Implement well-structured automated tests Communicate with the business and product teams Work on integrations with external partners Use modern technologies like Java 21 running on Spring Boot 3.2, Kafka, Redis, Clickhouse, PostgreSQL, Maven What You’ll Need Proven relevant education related to Software Development Willingness to learn & work with our current Java & Spring ecosystem Basic knowledge of SQL Ability and confidence to communicate within the team (Polish and English are required) Passion for software development and good engineering practices First professional experience, e.g., internship, is a plus What You’ll Enjoy Cosmose provides employees with a great platform to immerse and learn about the most exciting, innovative, and disruptive technologies in offline behavior solutions. We are unveiling untapped opportunities and profits in the industry - and we’re just getting started. At the core of our constant innovation is a rockstar engineering team, including four world championship programming medalists, working alongside driven, curious minds across all departments. You’ll work with a seasoned leadership team, backed with expertise across strategic domains - all within a culture that values learning, impact, and cross-functional collaboration. Cosmose is where a strong culture and shared goals unite individuals and teams to achieve bold milestones together. We’re building something big - and we’re just getting started. If you’re excited about shaping the future of AI-powered mobile content and working with a team that’s pushing boundaries, we’d love to meet you. 👉 Be part of the Cosmose story. Apply now! Read More On TechCrunch, Business Insider Show more Show less Seniority level Entry level Employment type Full-time Job function Engineering and Information Technology Industries IT Services and IT Consulting