Java Developer (Kazakhstan)

Навыки

• API (интеграции)
• AWS
• Azure
• CI/CD
• Многопоточность
• Распределённые системы
• Docker

О компании и продукте

• Today, we are working with organizations from various parts of the world, including North America, Western Europe, Israel, Australia, and the UAE

Задачи

• eveloping and maintaining backend services in Java 11+ using Spring Boot / Spring MVC in accordance with SOLID principles and Clean Code practices
• Designing and implementing RESTful APIs, ensuring proper integration with internal and external systems, with a deep understanding of HTTP method semantics (idempotency) and CORS policy configuration
• Working with relational databases (PostgreSQL / MySQL): writing complex SQL queries, profiling queries (analysis using EXPLAIN, cost evaluation, detailed interpretation of EXPLAIN results), advanced index optimization, and ensuring ACID principles
• Implementing the data access layer using Hibernate / JPA, optimizing query performance
• Integrating and configuring asynchronous communication through Apache Kafka (managing topics, partitioning, consumer groups, and offsets, ensuring fault tolerance in case of consumer failures)
• Ensuring application security (Spring Security, JWT, OAuth2)
• Supporting CI/CD processes, working with Git (GitFlow), containerizing applications using Docker, interacting with Linux environments, and participating in deployments to cloud environments such as Amazon Web Services / Google Cloud / Microsoft Azure when required
• Java Developer (Kazakhstan) Вакансії
• PL Warsaw 1 Rondo Daszyńskiego 00-843 Summary Andersen is hiring a Java Developer (Kazakhstan) to build scalable software solutions and support international digital projects across multiple industries
• Andersen is a pre-IPO software development company providing a full cycle of services

Требования

• trong command of Java 11+ (Core), with deep understanding of the internal implementation of data structures and collections: HashMap / HashSet / LinkedHashMap / LinkedHashSet, trees, and hash tables
• Excellent knowledge of Concurrency: thread pools (ForkJoinPool, ThreadPoolExecutor), understanding of their internal mechanics
• CompletableFuture and its specifics
• Atomics vs volatile
• ThreadLocal
• Semaphore
• CyclicBarrier vs CountDownLatch
• Knowledge of synchronization mechanisms: differences between synchronized / ReentrantLock / ReadWriteLock, understanding of deadlocks and starvation issues
• Understanding of Stream API and the nuances of using Parallel Stream
• Strong proficiency in Spring Framework: Spring Boot (lifecycle, stereotype annotations @Component, @Service), Spring MVC, Spring Data JPA
• Deep understanding of JPA / Hibernate: L1 / L2 cache, dirty checking, EntityManager, entity lifecycle
• Solid understanding of REST API architecture: request semantics, idempotency, proper handling of HTTP status codes
• Strong experience with relational databases (PostgreSQL / MySQL): writing complex SQL queries, duplicate detection, aggregations
• Database troubleshooting skills: reading EXPLAIN plans, understanding query optimizer behavior, index usage strategies (when they improve performance and when they slow it down)
• Understanding of Apache Kafka message brokers: architecture, partitions, producers/consumers, offsets, system behavior during node or consumer failures
• Understanding of Redis caching: key-value model, TTL, differences from in-memory cache
• Proficiency with tools: Git, Docker (user level), understanding of CI/CD processes, basic Linux skills
• English level – from Intermediate+ and above
• Desired skills Experience with microservices architecture
• Knowledge of Spring Security, JWT, and OAuth2
• Basic understanding of Kubernetes
• Experience working with cloud environments such as Amazon Web Services / Google Cloud / Microsoft Azure and high-load systems
• Other important skills for the vacancy are described in the knowledge matrix
• Reasons to join us Andersen cooperates with such companies as Siemens, Johnson & Johnson, AstraZeneca, BNP Paribas, Allianz, Ryanair, TUI, Verivox, Media Markt, etc
• For the past four years, our company has been growing annually by 60–100%, and we constantly involve top-notch specialists in our team

Условия

• Our expertise covers FinTech, Healthcare, Retail, Telecom, Media & Entertainment, Logistics, Travel & Hospitality, eCommerce, and other industries
• The project is focused on developing a next-generation business banking mobile application based on microservices architecture
• It includes building new features, integrating modern technologies, and preparing the migration of corporate clients from the legacy platform to the new solution

Паспорт вакансии

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