ND
Senior Software Engineer
full-time•Košice•€2k
About this role
Why NESS
We know that people are our greatest asset. Our staff's professionalism, innovation, teamwork, and dedication to excellence have helped us become one of the world's leading technological companies. It is these qualities that are vital to our continued success. As a Ness employee, you will be working on products and platforms for some of the most innovative software companies in the world.
You'll gain knowledge by working alongside other highly skilled professionals that will help accelerate your career progression.
You'll also benefit from a range of advantages, including access to training and certifications, bonuses, aids, social activities, and attractive compensation.
Salary: from 2.800 EUR/month, depending on skills and experience + benefits. The final offer for the selected candidate will reflect the candidate´s comprehensive assessment, skills, and past work experience.
Requirements and responsibilities
We are looking for an experienced Senior Java Developer to join a project focused on integrating third-party systems for large-scale data collection and processing.
We are looking for an experienced Senior Java Developer to join a project focused on integrating third-party systems for large-scale data collection and processing.
The platform is built on an event-driven architecture, designed to handle high data volumes in real time with strong guarantees around scalability, reliability, and performance. You will join a small, senior-level team with a high degree of technical ownership, autonomy, and direct influence on architectural and technical decisions.
While the role is strongly focused on backend development, we value engineers who are open to contributing beyond their core area when needed—whether that’s supporting DevOps or collaborating on cross-cutting initiatives. Familiarity with AI technologies is a strong plus, as we continue integrating intelligent capabilities into our products and workflows.
This role is well-suited for someone who enjoys working in complex systems, taking end-to-end responsibility, and continuously improving both the product and the way it is built.
What you'll do:
- Design, implement, and maintain Java-based backend services, components, and integrations
- Collaborate across a distributed Agile organization (Scrum or Kanban) to deliver outcomes
- Take ownership of high-complexity technical tasks, from design through production
- Actively support quality assurance, including test automation, integration testing, and code reviews
- Contribute to and evolve architecture, development standards, and best practices
- Participate in architectural discussions and technical decision-making
- Continuously propose and drive improvements in system design, performance, and developer experience
What you'll bring:
Experience & Professional Profile
- Strong experience designing high-availability, scalable, and high-performance backend systems
- Hands-on background in high-volume data processing and distributed systems
- Solid understanding and practical use of Agile methodologies
- Experience applying Test-Driven Development (TDD) and modern QA practices
- Familiarity with CI/CD principles, pipelines, and automated delivery
- Proven ability to work effectively in a corporate, cross-functional environment
- Self-driven, resilient, and comfortable operating in complex and evolving systems
- Team-oriented mindset with the ability to influence and motivate others
- Very good command of spoken and written English
Key skillsets:
- Java 11–21 with strong knowledge of the JVM and language fundamentals
- Spring ecosystem: Spring Boot, Spring Web / Web Flux (nice to have), Spring Data
- Build tools: Maven and/or Gradle
- Hands-on experience with event-driven architectures
- Experience with Azure (preferable), alternatively Amazon Web Services
- Infrastructure as a code: Terraform, Ansible
- Docker and Kubernetes
- Experience with Apache Kafka (or similar message brokers)
- Strong understanding of REST APIs (gRPC is a plus)
- Experience with relational and NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB (Cosmos))
Nice to have:
- Experience with Akka (Classic or Typed) is a strong plus
- Familiarity with reactive programming (e.g., Project Reactor, Akka Streams)
- Exposure to event-driven architectures, including event sourcing
- Hands-on experience with CI/CD pipelines (GitHub Actions, GitLab CI, or Azure DevOps)
- Working knowledge of security concepts such as OAuth2, JWT, and Basic Authentication
Not checking every single requirement?
If this role sounds good to you, even if you don't meet every single bullet point in the job description, we encourage you to apply anyway. For most of the candidates who applied, we found a role that was a very good fit with their skills.
Let's meet, and you may just be the right candidate for one of our roles.
At Ness Digital Engineering, we are willing to build a work culture that is based on diversification, inclusion, and authenticity.What you'll do
- Design, implement, and maintain Java-based backend services, components, and integrations while collaborating across a distributed Agile organization to deliver outcomes. Take ownership of high-complexity technical tasks from design through production and actively support quality assurance.
About Ness Digital Engineering
Ness Digital Engineering is a global provider of Intelligent Data and Software Engineering services, specializing in data, AI, and cloud-powered solutions that drive innovation and deliver measurable business outcomes. With over 25 years of engineering expertise and our proprietary data and software platforms and accelerators, Ness helps enterprises modernize systems, accelerate product development, and achieve scalable impact with speed and precision.
Our differentiation lies at the intersection of Industry domain and Technology. We focus on clients across financial services, technology and ISVs, Media & Entertainment, manufacturing, transportation and retail. Ness is known for its delivery excellence, deep domain knowledge, and product engineering expertise. Ness Digital Engineering is a portfolio company of KKR, a leading global investment firm.
Ready to join Ness Digital Engineering?
Take the next step in your career journey
Frequently Asked Questions
What does Ness Digital Engineering pay for a Senior Software Engineer?
Ness Digital Engineering offers a competitive compensation package for the Senior Software Engineer role. The starting salary is EUR 3k+ per year. Apply through Clera to learn more about the full compensation details.
What does a Senior Software Engineer do at Ness Digital Engineering?
As a Senior Software Engineer at Ness Digital Engineering, you will: design, implement, and maintain Java-based backend services, components, and integrations while collaborating across a distributed Agile organization to deliver outcomes. Take ownership of high-complexity technical tasks from design through production and actively support quality assurance..
Is the Senior Software Engineer position at Ness Digital Engineering remote?
The Senior Software Engineer position at Ness Digital Engineering is based in Košice, Region of Košice, Slovakia. Contact the company through Clera for specific work arrangement details.
How do I apply for the Senior Software Engineer position at Ness Digital Engineering?
You can apply for the Senior Software Engineer position at Ness Digital Engineeringdirectly through Clera. Click the "Apply Now" button above to start your application. Clera's AI-powered platform will help match your profile with this opportunity and guide you through the application process.