Senior Java Developer

DEVTALENTS Sp. z o.o.; Województwo mazowieckie; On-site; PLN 100,000 - 130,000; Full time

Benefits offered by this job

Ongoing training and workshops

Growth-oriented environment

Significant impact on product development

Job summary

DEVTALENTS Sp. z o.o. is seeking a highly skilled Senior Java Developer to join our team in Poland, Województwo mazowieckie. In this role, you will take ownership of end-to-end feature development and lead efforts in refining our microservices architecture. Ideal candidates will have 6+ years of experience, proficiency in Java, and a passion for continuous learning.

We offer a growth-oriented environment where you can make significant impacts on product development and architectural decisions while working with cutting-edge technologies.

Qualifications

• 6+ years of commercial experience in Java development.
• Expertise in Spring Framework and Hibernate/JPA.
• Hands-on experience with CI/CD and cloud infrastructure.

Responsibilities

• Lead feature development from design to deployment.
• Implement and refine microservices architecture.
• Drive improvements through code reviews and collaboration.

Skills

Java (version 17+)

Spring Framework (Spring Boot, Spring MVC)

Docker and containerisation technologies

CI/CD pipelines (e.g., Jenkins, GitLab)

SQL and relational databases

AWS cloud infrastructure

Education

Higher education in Computer Science or related field

Tools

JUnit

Mockito

Kubernetes

Job description

About us:

We are looking for a Senior Java Developer to be a part of the DEVTALENTS team and contribute to the development of truly amazing solutions for businesses all over the world.

Joining DEVTALENTS can be a life‑changing decision for you, with endless benefits along the way. We provide top projects for which recruitment is not possible externally because of our wide range of partners. We value open and transparent communication, leveraging tools like Slack and generative AI to enhance collaboration and efficiency. We support continuous growth, encouraging you to step beyond your comfort zone and develop technically and personally. We are looking for an experienced Senior Java Developer to join our team and provide technical leadership and mentorship.

Your Role:

• Take ownership of end-to-end feature development, from design to deployment.
• Make well‑informed design decisions to ensure scalability, performance, security, and adherence to best practices.
• Lead efforts in implementing and refining our microservices architecture, focusing on system integration and high availability.
• Drive continuous improvement through code reviews, mentorship, knowledge sharing, and collaboration with cross-functional teams.
• Utilize data and user insights to inform technical strategies and deliver robust, high‑quality solutions.
• Proactively identify opportunities for enhancements, optimisations, and quality improvements across the stack.

Technical Expertise:

• Proficiency in Java (version 17+), 6+ years of commercial experience.
• Expert‑level experience with the Spring Framework (Spring Boot, Spring MVC), and Hibernate/JPA for ORM. Familiarity with Spring Security and other modern Java frameworks is a plus.
• Hands‑on experience with Docker and containerisation technologies, as well as CI/CD pipelines (e.g., Jenkins, GitLab). Experience with Kubernetes and best practices in CI/CD is a bonus.
• Strong SQL skills and hands‑on experience with relational databases. Exposure to NoSQL databases, PostgreSQL, and database performance tuning is advantageous.
• Proficiency with JUnit, Mockito, and integration testing tools. Knowledge of performance testing and test automation frameworks is beneficial.
• Experience with AWS cloud infrastructure and microservices architecture. Understanding of DevOps tools (Terraform or CDK) and monitoring/logging tools (Prometheus, Datadog, Sentry) is a nice‑to‑have.
• Proven track record in designing scalable, microservices‑based systems. Familiarity with distributed systems, high‑availability designs, and event‑driven architectures (Kafka, RabbitMQ) is highly valued.
• Higher education with a profile in Computer Science or related.
• English level min. B2.

Additional Skills:

• Understanding of security best practices for Java applications and cloud environments.
• Familiarity with authentication protocols (OAuth 2.0, OpenID Connect, JWT).
• Knowledge of API design (RESTful or GraphQL) and container orchestration tools (Kubernetes).

Mindset & Approach:

• Passion for continuous learning, tackling complex challenges, and driving innovation.
• A collaborative spirit that thrives in cross‑functional, agile teams.
• Excellent communication skills, capable of explaining technical concepts to both technical and non‑technical stakeholders.
• A mentor who supports and elevates mid‑level and junior engineers, fostering a culture of knowledge sharing and continuous improvement.

What We Offer:

• Significant impact on product development and architectural decisions.
• A growth‑oriented environment that encourages stepping out of your comfort zone, experimenting with new technologies, and advancing your technical expertise.
• Ongoing training, workshops, and opportunities to stay at the cutting edge of technology.