Java Developer in Almaty

Summary

Andersen is hiring a Java Developer in Almaty 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. For over 19 years, we have been helping enterprises and middle-sized firms worldwide transform their businesses by creating effective digital solutions using innovative technologies.

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

Responsibilities

• Developing 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.
• Developing reliable caching mechanisms: selecting optimal strategies (in-memory vs distributed cache), hands-on work with Redis (TTL management, understanding of physical data storage).
• 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.

Requirements

• Strong 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.
• Andersen has mentoring and adaptation systems for new employees, and transparent performance review and assessment systems will allow you to determine your development path and plan your growth.
• The most important thing that we value in our employees is a commitment to continuous learning. The company supports them in this and gives them access to the best educational platforms, seminars, and practices. In addition, for over 19 years, Andersen has assembled a huge knowledge base and established a robust resource management institution.
• We have been strengthening our expertise since 2007. During this time, we have formed excellent teams with streamlined processes, where you can learn something new from your colleagues every day and enjoy your work.
• We are a cool young team of like-minded people communicating informally.
• You'll have a stable and competitive salary and an extensive benefits package.
• At Andersen, we have many different ways to grow. You can improve as a specialist or a manager, and all your activities will be decently rewarded.

Join us!

Lokalizacje

Kazakhstan