Senior Java Developer

Java

Tęczowa 7, Wrocław+1 Location

Tooploox

20 000 - 26 000PLN

Net per month - B2B

Full-time

B2B

Senior

Remote

Tech stack

English

B2

Java

master

REST API

advanced

Spring

advanced

Docker

regular

Kafka

regular

ReactJS

nice to have

LLM's

nice to have

GCP

nice to have

NoSQL

nice to have

Job description

Hi there!

We are Tooploox, an AI software development company offering custom AI solutions and services. We help innovative companies and startups design and build digital products with generative AI, mobile, and web technologies.

Our team, consisting of nearly 200 experts including our R&D team of over 40 engineers, many with PhDs, has pioneered AI solutions across industries like healthcare, fashion, and e-commerce. We’ve published over 15 research papers in top conferences like NeurIPS and ICML.

We are looking for a Senior Java Developer to join our team. The ideal candidate will have experience developing scalable Java applications. You will be instrumental in designing, implementing, and maintaining complex software systems and collaborating with cross-functional teams to deliver robust solutions.

Here's what your journey with us would look like:

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 and 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+

• Strong understanding of Agile process, roles within the process and key ceremonies

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 is a nice to have

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!

Published: 14.08.2025

Office location