Senior Java Developer

Hi there! 👋🏻

We’re Tooploox 💎, a Solvd Inc. company.

We create AI-powered products and services that make a real difference. Our team of nearly 200 specialists - including a 40+ person R&D team with many PhDs - has pioneered AI solutions across industries from healthcare to e-commerce. We’ve published research in top-tier venues like NeurIPS and ICML, while delivering real-world applications that help our clients innovate and scale.

We are looking for a Senior Java Developer to join our team. The ideal candidate will have experience developing scalable Java applications.

About the project: We are developing a data retrieval and operations platform for a next-generation customer support system for a global e-commerce leader. The platform will provide a federated GraphQL interface that unifies access to multiple backend services, enabling low-latency, real-time data retrieval and transactional operations to support AI-driven workflows.

The role will focus on designing, building and optimizing the platform to ensure scalability, reliability and test automation. This is a multi-team, collaborative initiative that requires close coordination with other delivery teams, adherence to high engineering standards and a strong focus on integration and architectural alignment.

What you will do:

• Develop and maintain the server-side logic of our applications using Java

• Implement efficient and performant backend code for high-volume production applications

• Monitor application health, identify related risks, and ensure reliability in production environment

• Contribute to all phases of the development lifecycle, from concept to deployment

• Review and refactor code, establishing best practices for code hygiene and organization

Experience and skills you need to join us:

• 5+ years of backend development experience in Java and Spring Framework

• Proficient in RESTful API design, experience with GraphQL APIs

• Experience with message brokers (e.g., Kafka, RabbitMQ, ActiveMQ) and caching (e.g., Redis, Memcached)

• Proficient with authentication and authorization mechanisms, especially OAuth 2.0

• Experience with containerization and orchestration tools like Docker and Kubernetes

• Knowledgeable in performance troubleshooting, profiling, and debugging tools

• Capable of solving complex challenges related to latency, data consistency, and performance in distributed systems

• Understanding patterns of distributed systems design; resilience patterns such as circuit breakers, retries, and timeout

• Proficient with code versioning tools, such as Git

• Skilled in CI/CD tools and practices

• English: B2+ (Written and Oral)

• Experience working in a lean agile process

• Proactive approach in understand the customer’s business and refining business requirements into technical requirements

It would be great if you also have:

• Experience with API contract testing

• NoSQL (e.g., MongoDB, Cassandra)

• Prompt engineering and experience with integration of GenAI LLMs into productions (ideally) or pet projects at least (OpenAI, Azure OpenAI, Bard, Llama)

• Familiarity with federated Graph architectures

• Experience mentoring less experienced colleagues is a strong advantage

• Team leader experience is a strong advantage

• Hands-on experience with Google Cloud Platform

• ReactJS experience

The ideal candidate would have:

• Strong communication skills with experience in direct customer interactions.

• Ability to engage with clients on technical issues, gather requirements, manage expectations and provide updates on project status

• Ability to learn quickly, adapt to new technologies, and perform tasks independently

• Passion for writing clean, efficient, and maintainable code (and encouraging others to do so)

How we work:

At Tooploox 💎, you have the flexibility to choose your working hours ⏰ and location 📍. While we value remote work, we also believe in building relationships 🤝and invite you to join us in our Warsaw and Wrocław offices 🏢. Enjoy a relaxed atmosphere 🍃 and try some “home-made” pizza 🍕 from our office pizza oven. We love having pets 🐶 in the office, so feel free to bring yours along.😁

Join us and shape the future of AI while working the way you like!