Backend Developer

At Mindbox we connect top IT talents with technology projects for leading enterprises across Europe.

We are seeking a Senior Java Developer to join our Messaging Delivery Platform team, responsible for delivering critical capabilities that enable communication with customers through multiple outbound channels. The platform is in the process of modernization and standardization, bringing opportunities to work on distributed systems using modern technology stacks in an Agile product team environment.

This role ensures delivery of high-quality, efficient, and secure solutions aligned with enterprise requirements, technical best practices, and industry standards.

Sounds like your kind of challenge?

What you’ll be doing

Design, build, and maintain scalable, high-quality applications and distributed systems based on agreed requirements.
Work within an agile product team to implement solutions using modern technologies and continuously evolve to adopt new paradigms.
Ensure high code quality, adhering to best practices, industry standards, and internal definitions of done.
Conduct unit testing and contribute to establishing appropriate automated test coverage (TDD principles).
Collaborate closely with team members and stakeholders, maintaining clear and proactive communication.
Define and govern technical quality standards, contributing to consistent platform modernization.
Provide innovative technical solutions for complex business challenges while ensuring compliance and security standards.
Promote engineering excellence through coaching and mentoring.

Note: Detailed project information will be shared during the recruitment process.

What you get in return

Flexible cooperation model
Hybrid work setup – 2 days per week from the office
Collaborative team culture – work alongside experienced professionals eager to share knowledge
Continuous development – access to training platforms and growth opportunities
Comprehensive benefits – including Interpolska Health Care, Multisport card, Warta Insurance, and more
High quality equipment – laptop and essential software provided

Who we’re looking for

Extensive hands-on experience with Java (8/11+) and Spring Boot, delivering enterprise-grade applications.
Proficiency in Kubernetes for container orchestration and deployment.
Strong practical experience with Cloud technologies (AWS preferred).
Knowledge and implementation experience of CI/CD pipelines using tools such as GitHub, Jenkins (shared libraries), Maven, Groovy, and Agile practices.
In-depth understanding of API design standards and best practices:
- Swagger and OpenAPI 3.0, REST, JSON, Microservices.
Experience with authentication/authorization frameworks (OAuth 2), and API gateways (e.g., Kong API Gateway).
Familiarity with Agile testing discipline including TDD, as well as solid experience in Agile/Scrum environments.
Ability to translate business requirements into technical solutions, providing innovative and scalable designs.
Commitment to continuous learning and staying informed on current tools and technologies.

Nice to have:

Experience driving platform modernization initiatives.
Exposure to observability solutions and performance optimization.

Joining this project you’ll become part of Mindbox – a tech-driven company where consulting, engineering, and talent meet to build meaningful digital solutions. We’ll back you up every step of the way, accelerate your development, and ensure your skills make a difference.

Backend Developer

Kraków

B2B

1450 - 1650 PLN/MD

Apply for position

I will handle your recruitment

Karolina Kuśmierczyk-Pazdro

SUPPORT & BENEFITS

Private healthcare

Fast access to doctors and medical tests.

Mindbox fully covers the individual package. You can extend the coverage to your partner and family on preferential terms. A wide network of medical providers and clear rules for everyday use.

Multisport

Energy that pays off.

We cover 50% of the card cost. You get access to thousands of sports facilities across Poland, plus a convenient mobile app. Additional cards for family members are available.

Training & development

Practical support for your career growth.

We co‑fund courses, certifications and conferences under a clear Training Policy. You also get access to a library of recorded webinars and trainings – available whenever you need them.

Eyewear or contact lenses co‑funding

Clear vision means comfortable work.

Up to PLN 500 every two years, with an additional PLN 300 available in justified cases. Simple reimbursement, regardless of your form of cooperation.

Group life insurance

Real protection from day one.

Option I is fully funded by Mindbox, Option II is co‑funded. You can include your partner and adult children, with coverage that also applies to treatment and hospitalisation abroad.

Ongoing support from the Talent Network Development

You’re not on your own in a project.

Regular contact, quick response and a partnership‑based approach. You focus on your work — we help take care of the rest.

Regular integration meet‑ups

Relationships that work beyond the project.

Cyclical meet‑ups for contractors in major cities across Poland. A space to talk, exchange experience and stay in real contact with the Mindbox team.

Annual company‑wide integration

One event. The whole community.

A two‑day company gathering with accommodation, transport and a full activity programme. Time to connect teams from across Poland and build shared experiences.