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Senior Java Engineer

Unifiedpost Solutions d.o.o.

Beograd | Hibrid

07.02.2026.

  • 2 izvršioca
  • ugovor
  • puno radno vreme

We are looking for an experienced Senior Java Engineer to join our team and play a key role in developing and optimising high-performance applications that handle millions of requests. You will work on challenging scalability problems, design a robust backend solutions, and ensure our systems deliver exceptional speed and reliability under heavy load.

Responsibilities:

  • Design, develop, and maintain high-throughput Java applications using Spring Boot
  • Optimize application performance to handle large volumes of concurrent requests with minimal latency
  • Write efficient SQL queries and optimize database interactions for speed and scalability
  • Identify and resolve performance bottlenecks through profiling, load testing, and code optimization
  • Implement caching strategies, connection pooling, and other techniques to improve system throughput
  • Collaborate with cross-functional teams to define technical requirements and deliver scalable solutions
  • Participate in code reviews and contribute to engineering best practices
  • Monitor application health and proactively address performance issues in production

Requirements

  • 5+ years of professional experience in Java development
  • Strong expertise in Spring Boot and the Spring ecosystem (Spring MVC, Spring Data, Spring Security)
  • Solid experience with relational databases and SQL optimization (indexing, query tuning, execution plans)
  • Proven track record of building and scaling high-traffic applications
  • Deep understanding of concurrency, multithreading, and asynchronous processing in Java
  • Experience with performance profiling tools (JProfiler, VisualVM, or similar)
  • Familiarity with caching solutions (Redis, Memcached) and message queues (Kafka, RabbitMQ)
  • Knowledge of RESTful API design and microservices architecture
  • Experience with containerization (Docker, Kubernetes)
  • Fluent level in English communication both written and verbal
  • Availability for frequent travel to client sites (Dubai)

Nice to Have:

  • Experience with cloud platforms (AWS, GCP, or Azure)
  • Knowledge of monitoring and observability tools (Prometheus, Grafana, ELK stack)
  • Experience with CI/CD pipelines and DevOps practices

Who is Unifiedpost Group

At Unifiedpost Group, our mission is to help customers structure complex financial ecosystems by delivering convenient, smart, digital solutions.

Throughout the world, businesses are digitizing their financial value chain: from contract or order to invoice, payment, and financing. For this evolution to succeed, there must be a trusted network connecting this diverse ecosystem.

Our secure, cloud-based platform empowers businesses by creating a space where this network can exist and deliver streamlined, automated business functions, from e-invoicing and payments processing to working capital financing, e-identity solutions, and more.

We look forward to receiving your application and discussing how you can contribute to our team's success.

Please send your application in English electronically.
Only shortlisted candidates will be contacted.

    Unifiedpost Solutions

    Naša bezbedna platforma zasnovana na oblak tehnologiji osnažuje firme i omogućava pojednostavljene, automatizovane poslovne funkcije, od e-faktura i obrade plaćanja, do finansiranja obrtnog kapitala, rešenja e-identiteta i ostalo.  

    Napomena: Poslovi.infostud.com ne vrši posredovanje u zapošljavanju u Srbiji, niti u inostranstvu. Postupak selekcije i odabira kandidata je u nadležnosti poslodavca, a odredbe ugovora o radu predstavljaju direktan dogovor između poslodavca i zaposlenog. Svi pojmovi u oglasima, koji su upotrebljeni u muškom rodu, odnose se bez diskriminacije i na osobe ženskog pola i obrnuto, osim ukoliko specifičnim zahtevima posla nije drugačije propisano.