Senior Java Engineer - High-Load & Real-Time Systems

This is us At Avenga, we believe that human creativity empowers technology that matters. Operating globally, our 6000+ specialists provide a full spectrum of services, including business and tech advisory, enterprise solutions, CX, UX and Ul design, managed services, product development, and software development.

This is the job We are looking for a Senior Java Engineer to join a project for a leading US streaming technology company transforming how people watch television.

You will contribute to a highly scalable, highly available, real-time advertising platform that supports a rapidly growing streaming business. Working with an experienced international engineering team, you will design and develop high-performance backend applications operating at scale.

This role is an excellent match for an engineer who has a strong command of Java, understands concurrency beyond the framework level, and enjoys solving complex performance and scalability challenges.

This is you

• At least 5 years of professional experience in Java backend development
• Hands-on experience building large-scale, low-latency distributed systems
• Strong command of Java 11 or newer
• Solid practical knowledge of Java Concurrency and multithreading
• Experience with asynchronous programming in Java, including CompletableFuture
• Good understanding of algorithms, data structures and performance optimization
• Strong knowledge of object-oriented programming and software design principles
• Basic understanding of high-load system design and scalability techniques
• Basic practical knowledge of Kafka
• English at B2 level or higher, enabling effective communication in an international team

Nice-to-have skills:

• Experience with distributed caching
• Experience working with SQL and NoSQL databases
• Knowledge of AWS or other cloud platforms
• Experience with Big Data technologies
• Previous experience in adtech, streaming, media, fintech or another high-throughput domain

This is your role

• Design, develop and maintain large-scale, highly available, real-time Java applications
• Build efficient concurrent and asynchronous processing solutions
• Investigate and resolve performance, scalability and reliability challenges
• Write clean, maintainable and well-tested production code
• Contribute to technical decisions, engineering standards and development best practices
• Collaborate with engineers, product specialists and analytics teams on strategic initiatives
• Identify technical gaps and operational problems and propose robust solutions
• Communicate effectively with both technical and non-technical stakeholders
• Take ownership of delivered solutions throughout the development lifecycle

At Avenga, everyone matters. We provide equal opportunities in recruitment, career development, and leadership, regardless of race, ethnicity, gender identity, sexual orientation, disability, age, religion, or any other characteristic. We are committed to fostering a work environment where our diverse community of employees, candidates, and business partners actively shapes our growth. By bringing together people from different backgrounds and experiences, we build a workplace where everyone feels free to be themselves while honoring the boundaries of others.