Junior Software Engineer Java

About Mirakl:

Founded in 2012, Mirakl has been at the forefront of marketplace innovation, empowering every business to compete in the platform economy.

Today, Mirakl’s operating system combines an enterprise marketplace solution (Mirakl Platform) that enables retailers and B2B organizations to launch, scale, and operate marketplaces and dropship, AI-powered multichannel selling (Mirakl Connect), retail media (Mirakl Ads) and an agentic commerce infrastructure (Mirakl Nexus).

With dual headquarters in Boston and Paris, Mirakl helps a global ecosystem of 450+ marketplaces (B2C and B2B) and a network of over 100k third-party marketplace sellers. Brands like Macy’s, Decathlon, Carrefour, Asos, and Airbus Helicopters use Mirakl to grow their businesses in new and remarkable ways.

For more information: www.mirakl.com.

Mirakl in Numbers:

• 🗓️ Founded in 2012 | Member of French Tech Next40
• 👥 750+ employees in 9 offices worldwide: Paris, Barcelona, Bordeaux, Boston, London, Munich, New York, Sydney, Tokyo
• 🇫🇷 350+ Mirakl Tech teams members mainly based in France
• ⚙️ 5 Saas Solutions

Our Values:

Working at Mirakl means accelerating your career alongside ambitious, passionate, and supportive colleagues. We're proud of the diversity of backgrounds, perspectives, and experiences that make our teams unique.

Our 5 values guide how we collaborate:

• 💡 Work Hard Together: Teamwork and collaboration are the foundation of our success
• 🏆 Get Things Done:  We prioritize action and efficiency for impactful results
• 🚀 Go Above & Beyond:  We tackle challenges proactively and always aim for excellence
• 🎓 Succeed Through Expertise: Knowledge sharing and continuous learning are core to our culture
• 🤝 Satisfy & Empower Clients: We're committed to our clients' success

Your role :

As a Junior Software Engineer Java in the Mirakl Labs product teams, your main mission is to design, develop and deploy new business features proposed by the Product Manager. On a daily basis, you will be implementing these new features across all layers of our applications, from interfaces (UI or REST API) through the business layer to the creation of database schemas and scripts. As part of a team with total ownership over the products it develops, you are a key player in ensuring both the business consistency of the product and its technical stability.

The position is a permanent contract, based in Paris.

95% of our tech teams are based in France and 99% speak French.

Day-to-day activities:

• Build, test, and ship to production through continuous delivery
• Harness AI-powered tools like Claude Code, Codex, and Cursor to move faster
• Join design sessions alongside a team of 5 developers, the Product Manager, and UX/UI designers
• Shape technical decisions that drive the product forward
• Sharpen code quality through reviews and pair programming
• Own what you build — monitor and debug production issues end to end
• Take part in Stand-ups, Sprint Reviews, and retrospectives
• Help define the next quarter's labs roadmap
• Drive continuous improvement in how the team develops software
• Track the real-world impact of your features: business cycles, adoption, usage

Our tech stack:
Java 21 (with planned migration to 25), Spring Boot, Kafka, React/Redux, PostgreSQL, Elasticsearch, Go, Docker, Kubernetes, AWS, Google Cloud

You'll love this job if : 

• You have up to 2 years of experience with Java and Spring
• You are genuinely curious (and pragmatic) about AI, and you believe it's already reshaping how developers work
• You are eager to work on web-scale challenges and distributed architectures
• You care deeply about clean, well-crafted code
• You want a real voice in technical decisions, not just a seat at the table
• You thrive in fast-paced, demanding environments where you grow every week
• You're hungry to learn and sharpen your craft
• You're fluent in French and comfortable working in professional English

🎥  Featured Videos

Dive into daily life at Mirakl Labs with Pauline, Java Engineering Manager, who offers a glimpse into team life and our tech culture 📺 here

Meet Nelson, Director of Engineering, who shares his vision on Mirakl's growth, technical challenges, and what makes our work environment unique 📺 here

• 30 minutes with someone from the recruitment team to discuss your key projects, ask some tech questions, and present the position in detail
• 45 minutes on Zoom with an experienced developer to discuss our technical stack and assess your knowledge
• 1 hour with the Manager of the relevant squad for a business discussion
• 2 x 45 minutes or 1 hour STAR interview to assess your alignment with our values

More information about our recruitment philosophy 👉🏻https://www.linkedin.com/pulse/3-tips-pour-briller-en-entretien-star-chez-mirakl-kauffmann-0ojzf/ 

We welcome collaborators with their diverse perspectives and experiences to power us forward. These often far exceed conventional job requirements and help us create a culture of continuous learning. If you’re ready to join a global leader powering digital transformation for 450+ of the world’s most innovative retailers and B2B organizations..

We may use Artificial Intelligence (AI) solutions to help streamline our hiring process, including screening applications, analyzing resumes, and assessing responses. While AI helps us work efficiently, all final hiring decisions are made by humans. For more information, visit our AI Guidelines for Candidates and Interviews.