Jobs Java

Ajax Systems is an international technological company and Europe’s largest security system manufacturer. In addition, the company offers solutions for video surveillance, smart homes, fire detection, and flood prevention. The product portfolio includes 280 wireless and wired devices for security and automation. Today, Ajax protects over 4.5 million users in 187 countries worldwide. 

We are looking for a smart, experienced, and technically proficient Senior Java Developer to join our team in Kyiv office.

Required Experience:

- Java: 5+ years of professional backend development in enterprise environment
- Kotlin: Knowledge and practical work experience
- Java Concurrency: Strong understanding and practical application experience

Architecture & Design
- Understanding of SOA, microservice, and event-driven architecture
- Cloud development principles with practical AWS experience
- Ability to scale and ensure high availability of loaded systems

Technologies & Tools

Required:

- Kafka, MongoDB, NATS
- Enterprise-grade stack (messaging brokers, in-memory storages, NoSQL, key-value databases)
- Docker and Kubernetes (containerized applications)
- Git, Gradle, Jenkins
 

Nice to Have:
- Redis, Netty, Akka, gRPC, Project Reactor
 

We offer:
- The opportunity to share and implement your own ideas that could impact products and production
- Work with a motivated team and an environment with a zero-bullshit culture
- Competitive salary
- Medical insurance
- Corporate English classes

About Flamingo

Flamingo is revolutionizing the Managed Service Provider (MSP) industry with an AI-driven, open-source platform for IT and security. Our goal is to empower MSPs with automation, optimization, and scalability tools to enhance their operations. 

Role Overview

As a Senior Back-end Engineer (Java) at Flamingo, you will design and develop scalable, high-performance back-end services and APIs using Java and Spring Boot. You will be responsible for implementing event-driven microservices, optimizing system performance, and ensuring high availability as we scale our platform. Your expertise in processing high-volume logs and integrating multiple data sources will be critical to building a robust and efficient system.

Key Responsibilities

• Design and develop scalable backend services and APIs using Java (Spring Boot).
• Architect and implement event-driven microservices with Kafka and RabbitMQ.
• Process and analyze high-volume logs efficiently to ensure scalability and real-time insights.
• Integrate and manage multiple data sources, including SQL, NoSQL, and streaming data.
• Optimize database performance using PostgreSQL, Redis, and Elasticsearch.
• Implement authentication and authorization mechanisms with OAuth, JWT, and Keycloak.
• Collaborate with front-end and DevOps teams to build a seamless and resilient system.
• Ensure code quality through automated testing, CI/CD pipelines, and best engineering practices.

Qualifications

Must-Have:

• 5+ years of experience in backend development with Java and Spring Boot.
• Experience in microservices architecture, including event-driven systems (Kafka, RabbitMQ).
• Strong knowledge of RESTful APIs, GraphQL, and WebSockets.
• Experience processing high-volume logs and working with log management tools (ELK stack, Loki, Fluentd, OpenTelemetry).
• Experience working with multiple data sources, including relational (PostgreSQL) and non-relational (Redis, Elasticsearch) databases
• Experience with containerization (Docker, Kubernetes) and cloud platforms (AWS/GCP).
• Understanding of security best practices in backend development.

Nice-to-Have:

• Experience with functional programming in Java or Scala.
• Familiarity with distributed tracing (e.g., Jaeger, Zipkin) for microservices.
• Knowledge of cloud-native architectures and serverless frameworks.
• Exposure to message queues and event sourcing.

Why Join Flamingo?

• High-impact role: As a back-end engineer, your contributions will directly shape Flamingo’s product and technology.
• Ownership & Equity: Competitive compensation, including significant equity in an early-stage, high-growth startup.
• Innovative Tech Stack: Work with cutting-edge open-source technologies in AI, automation, and security.
• Remote-first Culture: Flexibility to work from anywhere while collaborating with a top-tier team.
• Mission-Driven Company: Join a team passionate about disrupting the MSP industry and making enterprise-grade security and IT automation accessible to all.

We're seeking a Software Java Engineer with 5+ years of experience to help build and scale the backend services that power our content discovery, licensing, and delivery platforms across all of our content libraries. You'll join a team that's passionate about clean architecture, performance, and solving complex challenges at scale. If you thrive in a collaborative environment and love building robust APIs, data-driven systems, and data modeling we'd love to hear from you.

What You'll Do:

• Design, implement, and maintain backend services using Java, Spring Boot, and the broader Spring ecosystem.
• Build and evolve RESTful APIs that power content metadata, search, recommendation, and licensing workflows.
• Work with Kafka to build event-driven and real-time processing systems.
• Use SQL and work with relational databases to support structured content metadata.
• Partner with data and analytics teams to model data in data warehouses, supporting reporting and analytics use cases.
• Build and maintain DBT models to transform raw data into clean, usable datasets.
• Leverage the AWS ecosystem for service deployment, data storage, and pipeline orchestration.
• Contribute to technical discussions, system design, and code reviews.

Requirements:

• 5+ years of professional backend development experience.
• Strong proficiency in Java, with experience using Spring Boot and Spring Framework.
• Experience designing and consuming REST APIs.
• Familiarity with Kafka or other message streaming platforms.
• Solid understanding of relational databases and writing optimized SQL.
• Comfortable working with GraphQL.
• Exposure to Python or willingness to learn.
• A collaborative mindset with strong communication skills.
• A passion for clean code, scalable systems, and continuous learning.

Nice-to-Have:

• Practical experience working with data warehouses and DBT for data transformation and modeling.
• Hands-on experience working with the AWS ecosystem (especially Aurora/Dynamo DB).
• Experience working with Node.js and/or Typescript.
• Knowledge of containerization and orchestration (Docker, Kubernetes).
• Experience with Databricks/Snowflake.
• Background in building systems for search, metadata enrichment, or digital asset management.

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

We are helping our partner — a fast-growing product company in the iGaming space — find a Senior Java Developer to join their backend team.

This is not a “just write code” role.

This is about building systems, making decisions, and owning the result.

What this role is really about

You’ll be working on a high-load casino product, where:

• systems process real-time events
• performance matters
• architecture decisions have real impact

The team builds services from scratch and owns them end-to-end.

What you’ll be doing

• Build new backend services from scratch
• Participate in architectural and technical decisions
• Work with microservices and distributed systems
• Solve complex technical challenges
• Collaborate in a cross-functional team (product / QA / dev)
• Take ownership of what you build — not just tasks

What we’re looking for

• 5+ years of experience with Java
• Strong experience with microservices architecture (2+ years)
• Deep understanding of distributed systems
• Hands-on experience with:
  • Spring Boot
  • PostgreSQL
  • Kafka (or similar messaging systems)
  • SQL + NoSQL databases
• Experience with AWS / Kubernetes will be a strong plus
• gRPC — nice to have

But more importantly:

You think, not just code

You take ownership

You can explain your decisions

What you get

• Product company (not outsourcing)
• Real impact on architecture and product
• Strong engineering team
• Fast-paced environment with real challenges
• Remote work

Our client is a leading European online car marketplace with over 30 million monthly users and a presence in 18 countries. As a Senior Java Engineer, you will play a pivotal role in shaping the future of online car markets, contributing to the platform’s scalability, reliability, and overall user experience for millions of car buyers and sellers across Europe.
 

Responsibilities:

• Design, implement, and maintain scalable backend services in Java.
• Model complex business domains using strong type systems.
• Build and manage event-driven, distributed systems with high throughput.
• Contribute to architectural decisions regarding concurrency, streaming, and data consistency.
• Write clean, testable, and maintainable code following best practices.
• Improve CI/CD pipelines, system observability, and reliability.
• Collaborate closely with product, platform, and engineering teams to deliver high-quality solutions.
   

Requirements:

• 5+ years of backend development experience in Java.
• Strong knowledge of Spring Boot.
• Hands-on experience with event-driven architectures, preferably Kafka.
• Practical experience with the Typelevel ecosystem (Cats, Cats Effect, FS2, Http4s).
• Deep understanding of:
  • Effect systems (Cats Effect);
  • Functional programming principles;
  • Type classes and higher-kinded types;
  • Pure vs impure boundaries.
• Experience building distributed systems.
• Strong understanding of concurrency and asynchronous programming.
• Upper-Intermediate English or higher for technical communication.
   

Nice to Have:

• Experience with Scala 3.
• Experience with PHP.
• Knowledge of tagless-final patterns.
• Background in fintech or high-integrity domains.
• Contributions to open source projects.
   

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

We're seeking a Software Java Engineer with 5+ years of experience to help build and scale the backend services that power our content discovery, licensing, and delivery platforms across all of our content libraries. You'll join a team that's passionate about clean architecture, performance, and solving complex challenges at scale. If you thrive in a collaborative environment and love building robust APIs, data-driven systems, and data modeling we'd love to hear from you.

What You'll Do:

• Design, implement, and maintain backend services using Java, Spring Boot, and the broader Spring ecosystem.
• Build and evolve RESTful APIs that power content metadata, search, recommendation, and licensing workflows.
• Work with Kafka to build event-driven and real-time processing systems.
• Use SQL and work with relational databases to support structured content metadata.
• Partner with data and analytics teams to model data in data warehouses, supporting reporting and analytics use cases.
• Build and maintain DBT models to transform raw data into clean, usable datasets.
• Leverage the AWS ecosystem for service deployment, data storage, and pipeline orchestration.
• Contribute to technical discussions, system design, and code reviews.

Requirements:

• 5+ years of professional backend development experience.
• Strong proficiency in Java, with experience using Spring Boot and Spring Framework.
• Experience designing and consuming REST APIs.
• Familiarity with Kafka or other message streaming platforms.
• Solid understanding of relational databases and writing optimized SQL.
• Comfortable working with GraphQL.
• Exposure to Python.
• A collaborative mindset with strong communication skills.
• A passion for clean code, scalable systems, and continuous learning.

Nice-to-Have:

• Practical experience working with data warehouses and DBT for data transformation and modeling.
• Hands-on experience working with the AWS ecosystem (especially Aurora/Dynamo DB).
• Experience working with Node.js and/or Typescript.
• Knowledge of containerization and orchestration (Docker, Kubernetes).
• Experience with Databricks/Snowflake.
• Background in building systems for search, metadata enrichment, or digital asset management.

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

Intetics Inc., a global technology company providing custom software application development, distributed professional teams, software product quality assessment, and “all-things-digital” solutions, is seeking a highly skilled and experienced Senior Java Engineer to join our dynamic team on a full-time basis.

Project Overview:
The project focuses on developing and maintaining high-load, mission-critical banking systems that require high availability, performance, and reliability. The engineer will be involved in the full software development lifecycle and will work on building high-volume, low-latency applications for critical systems.

Key Responsibilities:
Design and develop high-volume, low-latency applications for mission-critical systems
Participate in all phases of the software development lifecycle
Write well-designed, testable, and efficient code
Ensure solutions comply with architectural and technical specifications
Prepare and produce releases of software components
Support continuous improvement by researching and proposing new technologies and approaches

Required Experience & Skills
5+ years of professional software development experience
Strong experience with Java / Java EE development
Experience with Spring Framework
Strong knowledge of relational databases, SQL, and ORM technologies (JPA2, Hibernate)
Solid understanding of object-oriented design and design patterns
Deep understanding of Java/JEE internals (classloading, memory management, transaction management, etc.)
Experience with web frameworks such as JSF, Wicket, GWT, or Spring MVC
Experience with Test-Driven Development (TDD)
Experience working with high-load systems

Ability to visit the client’s office in Tbilisi, Georgia
Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field

We are looking for an experienced Java Developer to join our team and work on innovative digital products across international markets.

Required skill set:
- 5+ years of experience with Java 11 or higher. Strong server-side Java.
- Experience in development of Web apps
- Good OOP skills
- Spring (IOC, Data, Security JWT)
- Strong knowledge of SQL (PostgreSQL is perfect)
- Experience of developing RESTful APIs
- Experience in designing and building production systems that work with data at scale
- Understanding of microservices architecture.
- Understanding distributed systems
Will be a plus:
- Experience with clickhouse.

Responsibilities:
- Creation of new features, services, and APIs
- Code review
- Interaction with development team members, analyst, tester, stakeholders
- Participation in planning and demonstration of sprint results
- Building a monolithic or microservice architecture.

What We Offer:
• Fully remote
• 21 paid vacation days + 3 paid sick leave days
• Working schedule: 9:00–18:00 or 10:00–19:00 (Kyiv time)
• Cooperation format: Ukrainian FOP or European B2B contract

Onicore is a FinTech company specializing in developing products for cryptocurrency operations. We strive to make crypto convenient and understandable for everyone.
 
And now we are looking for a talented and experienced Java Team Lead to join our team. If you’re passionate about working with the latest technologies, contributing to exciting product developments, and collaborating with an awesome team, we want to hear from you!
 
Your Key Duties:

• Design, develop, and maintain high-performance, scalable Java-based applications in the FinTech domain.
• Implement and optimize multithreaded and concurrent solutions, ensuring thread safety and system reliability.
• Build and maintain microservices using the Spring ecosystem.
• Ensure database efficiency, including query optimization, proper indexing, and transaction handling.
• Evaluate and improve application performance, conduct profiling sessions, and resolve bottlenecks.
• Design and implement synchronous and asynchronous integrations with internal and external systems.
• Participate in architectural discussions, propose improvements, and drive technical initiatives.
• Collaborate closely with product managers, architects, and QA engineers to deliver business-critical solutions.
• Write clean, maintainable, and well-tested code following best practices.
   

Your Skills:

• 5+ years of professional experience in Java development.
• Strong expertise in Java 17+ (knowledge of modern language features, streams, lambdas, functional programming concepts).
• Deep understanding of core Java:
• Collections Framework, Generics, Streams, Functional Interfaces
• Concurrency utilities (Executors, CompletableFuture, Fork/Join, Locks, Atomics, etc.)
• Proven experience with the Spring ecosystem: Spring Boot, Spring Data (JPA/Hibernate), Spring Security, Spring Cloud (microservices).
• Solid understanding of databases (SQL and/or NoSQL), including:
• Transactions, isolation levels, and locking mechanisms
• Query optimization and indexing strategies
• Hands-on experience with multithreading and concurrency, including race conditions, deadlocks, synchronization, and strategies to avoid them.
• Proficiency in synchronous and asynchronous communication: REST, messaging systems (Kafka, RabbitMQ, etc.), event-driven architectures.
• Experience working on FinTech or financial services projects.
• Strong focus on performance evaluation, scalability, and reliability.
• Strong problem-solving skills, ability to work independently, take initiative, and drive solutions proactively.
• Self-driven and responsible, capable of working with minimal supervision.
• Proactive, solution-oriented mindset.
• Team player with a collaborative attitude.
   

Nice to have:

• Experience with Kubernetes, Docker, and cloud-native environments.
• Experience with application profiling and performance tuning:
• Tools such as VisualVM, JFR (Java Flight Recorder), JMC (Java Mission Control)
• Identifying and resolving performance bottlenecks
• Analyzing complexity of SQL queries and optimizing execution plans
• Familiarity with CI/CD pipelines and DevOps practices.
• Knowledge of distributed systems, event sourcing, or CQRS.
   

What’s on us:

— Competitive salary and benefits package.

— Opportunities for professional development and career growth.

— Health insurance.

— Remote work with the possibility to visit our office in Kyiv.

— Space to share your ideas and bring them to life.

Is this all about you? Send us your CV!

Ajax Systems is a full-cycle company working from idea generation and R&D to mass production and sales. We create security solutions for residential and commercial properties, with a portfolio of 280+ devices across intrusion protection, video surveillance, fire safety, and automation. The whole team is in one office in Lviv, all technical and product decisions are made locally.

We’re looking for an Java Developer to join us and continue the evolution of a product that we love: someone who takes pride in their work to ensure that user experience and development quality are superb. You will be able to develop the apps in the best hardware company of Ukraine with around 300M active users around the world. Moreover, very soon you will have a chance to start several new products from scratch.

Required skills:

• 5+ years of commercial experience in backend development with Java in an enterprise environment;
• Strong understanding of Java Concurrency and hands-on experience with concurrent programming in production systems;
• Solid understanding of SOA, microservices, and event-driven architecture;
• Practical experience with cloud computing platforms;
• Experience building and supporting high-load, scalable, and highly available systems;
• Hands-on experience with messaging brokers;
• Strong understanding of modern backend infrastructure, NoSQL, key-value databases, and in-memory storage solutions;
• Practical experience with Docker or Kubernetes;
• Experience with Git, Gradle or othet CI/CD tools;
• Strong knowledge of unit testing and automated testing approaches.

Would be a plus:

• Experience with some of technologies: Redis, Netty, Akka, NATS, AWS, MQTT, Kafka, MongoDB, gRPC.
• Practical experience with Kotlin.

What you will do:

• Design and develop core backend services and data pipelines for the product line;
• Build clean, maintainable, and production-ready code with a strong focus on quality;
• Contribute to backend architecture, drive technical decisions, and document solutions for reliable deployment and operations;
• Ensure proper test coverage with unit and integration tests;
• Take ownership of performance, scalability, and cost efficiency within your domain;
• Maintain production reliability through monitoring, alerting, dashboards, and runbooks;
• Investigate and resolve production issues, including deep-dive analysis of complex cases;
• Work in a strong engineering culture with testing, continuous delivery, and DevOps practices;
• Collaborate closely with product and engineering teams to deliver new features and improve existing services.

Why this role is interesting:

• Opportunity to work on high-load backend systems and distributed architecture;
• Real impact on core product development and architectural decisions;
• Modern technology stack and engineering-driven environment;
• Close collaboration with experienced engineers in a culture that values quality, ownership, and technical excellence;
• Challenging tasks where performance, reliability, and scalability truly matter.

We offer:

• The opportunity to share and implement your own ideas that could impact products and production;
• Work with a motivated team and an environment with a zero-bullshit culture;
• Competitive salary;
• Medical insurance;
• Corporate English classes;
• Compensation for professional training;
• The chance to take part in beta testing of Ajax security systems — receive and test new devices before their release.

Ajax Systems is a Ukrainian success story, a place of incredible strength and energy.
Join us in making Made in Ukraine 🇺🇦 synonymous with reliability.

Requirements:
5+ years of overall commercial software development experience
Java: 4+ years of experience
C++: 2+ years of experience
Scala: 2+ years of experience
В2+ English

Responsibilities:
Own SQL acceleration features end-to-end — from design to implementation and measurable performance impact
Implement and optimize Big Data processing algorithms across Scala, Java, and C++
Develop performance-critical components at the intersection of Big Data and compilers
Work with custom DSL and code generation systems to extend query execution capabilities
Contribute to cross-language integrations (Java  C++ via JNI) and overall system performance improvements

About us:
 

ARRISE sets the benchmark for service delivery and excellence in the iGaming industry. Playing a key role in the success of its clients, which include Pragmatic Play, a brand relied upon by the world’s biggest online casinos for its cutting-edge products, ARRISE helps to deliver exceptional gaming experiences to millions of players worldwide.
 

Our global team of talented and driven professionals are shaping the future of iGaming. Headquartered in Gibraltar, we have offices spanning Canada, India, the Isle of Man, Latvia, Malta, Romania, Serbia, Bulgaria, and the UAE, and more exciting destinations on the horizon.
 

At ARRISE, we take pride in creating growth opportunities at all levels, constantly investing in our people while welcoming new colleagues and forging strategic partnerships that open new opportunities for success.
 

To achieve this, we bet on ourselves. We know that success is a collective effort, and our team is driven by ambition, collaboration, and a shared commitment to grow and succeed—while embracing every step of the journey.
 

Be part of the future of iGaming with ARRISERS! See a job that excites you? Apply now, and our friendly recruitment team will connect with you soon. Your journey starts here!

 
Required skills: 

• 5+ years of Java development. 
• Strong programming skills with Java. 
• Experience with OOP/OOD. 
• Experience with clustered applications, pooling, connection management, transactions. 
• Familiarity with programming specifics like asynchronous I/O, concurrency, distributed web systems and regression. 
• A good foundation in algorithms, design patterns, and data structures. 
• Experience with unit/functional testing. 
• Strong experience with the most of Spring Framework/JDBC, databases (PostgreSQL). 
• Strong experience with Javascript and React Framework. 
• Maven, Git. 
• Strong understanding of RDBMS concepts + SQL. 

Will be a plus:  

• Familiarity with NoSQL databases like Redis. 
• Experience with Kubernetes and Nomad. 
• Experience with AWS services. 
• Experience with Oracle databases. 
• Experience with distributed messaging systems, particularly RabbitMQ. 
• Experience in application and infrastructure monitoring. 
• Proven ability to troubleshoot production problems related to software applications. 
• Exposure to high-load systems. 
• Good spoken and written English skills.   

 
 Company offers: 

• Long-term employment. 
• Flexible timetable. 
• Comfortable working conditions. 
• Paid vacation and sick leaves. 
• English lessons, gym. 
• Competitive salary level. 

Project Description:

The SEM product is embedded within the Geosciences Suite of Applications. This application has multiple views consisting of both 2D and 3D visualizations. The current data visualization is not sufficient for what we would like it to be. This role is expected to work with the lead and the product owner to understand the current shortcomings, investigate and research potential solutions, propose these solutions to the teams, and then work on the implementation of the agreed upon work. To get to this stage, the developers will also need to learn the inner workings of the visualization framework within Geoscience.

Responsibilities:

• Design, develop, and maintain graphics-intensive modules within the Geoscience platform using Java and OpenGL.
• Implement advanced 2D and 3D visualization features for seismic, geological, and geospatial data.
• Optimize rendering performance and ensure cross-platform compatibility, particularly in Linux environments.
• Collaborate with geoscientists and software engineers to translate domain-specific requirements into technical solutions.
• Participate in code reviews, testing, and documentation to maintain high-quality software standards.
• Stay updated with the latest developments in graphics technologies and geoscience applications.

Mandatory Skills:

Java

Linux

OpenGL (Open Graphics Library)

Mandatory Skills Description:

• Bachelor's or Master's degree in Computer Science, Geoscience, or a related field.
• 5+ years of professional experience in Java OR C++ development with a focus on graphics programming.
• Proficiency in OpenGL and related graphics libraries for rendering complex datasets.
• Strong experience working in Linux environments, including shell scripting and system optimization.
• Excellent problem-solving skills and the ability to work collaboratively in a multidisciplinary team.

Nice-to-Have Skills Description:

• Experience with geoscience software platforms.
• Familiarity with geoscience data formats and visualization techniques.
• Knowledge of additional programming languages such as Python, Java.
• Understanding of GIS technologies and spatial data analysis.
• Experience with agile development methodologies and version control systems like Git

Languages:

English: B2 Upper Intermediate

Dripify is a pioneering remote-first IT product company specializing in the development of outreach automation products. We empower businesses by enhancing the efficiency and organization of their hiring, sales, and marketing communication processes. Our innovative solutions redefine the way companies approach outreach, making interactions more effective and seamless.

We are seeking a dedicated Senior Java Engineer to join our team at Dripify, a leading B2B SaaS product company.

Project — dripify.com

Sales automation platform designed for marketers, business owners, and sales teams that allows automating cold-emailing and lead generation on LinkedIn.

Here is some of what you will do:

• Build modular, maintainable backend systems using Java 21+ and Spring Boot (MVC, REST, Security, Data, Messaging).
• Design and integrate performant, concurrent services using REST APIs and asynchronous messaging via SNS/SQS.
• Write tested, reliable code with a strong emphasis on unit and integration testing and CI/CD automation.
• Apply secure coding practices

• Collaborate on architecture and system design, taking full ownership of deliverables from implementation to deployment.

   

Requirements:

• 5+ years of hands-on Java development, with production experience in Java 21+
• Deep practical experience with Spring Boot modules
• Strong understanding of modular architectural principles and backend service decomposition
• Solid knowledge of Java concurrency and multithreaded environments
• Experience working with SQL databases (PostgreSQL preferred)
• Proficiency in RESTful API design and asynchronous messaging using SNS/SQS
• Familiarity with CI/CD pipelines and common quality gates (test coverage, static analysis, security scanning)
• Strong foundation in unit and integration testing
• Competence in Docker, Linux, and system-level debugging
• Understanding of logging and monitoring tools (e.g., ELK, Prometheus, Grafana)
• Commitment to secure development practices, including authentication, authorization, data validation, and least-privilege access

• Working knowledge of AWS services, including IAM, EC2, RDS, S3, CloudWatch, and Secrets Manager

   

Would be a plus:

• Experience with microservices architecture — including service decomposition, data ownership, and inter-service communication patterns
• Kubernetes (EKS or self-managed)
• Infrastructure-as-Code using Terraform
• AWS Certifications (e.g., Developer Associate, Solutions Architect)
• Bachelor’s or Master’s degree in Computer Science or a related field

Here is what we offer:

— 100% remote position, providing flexibility and work-life balance.
— Competitive salary reflecting your skills and expertise.
— 24 days of paid vacation per year to recharge and relax.
— 10 days of paid sick leave.
— Educational opportunities.
— Compensation budget for medical and hobby/sport expenses.
— Generous budget for birthdays and anniversaries.
— Online and offline team events.
— A collaborative and innovative work environment with passionate team members.

Hiring process:
✅Interview with Recruiter (45min) — ✅ Tech interview with Engineering Manager (1 hour) — Tech interview with Team Leader (1.5 hour) — ✅Reference check — ✅Offer

N-iX is looking for Senior Full-Stack developer (Java+React/Angular) to join our team. 

About the Role
Our client is looking for a Java Full‑Stack Developer to help accelerate product development for their flagship workforce management solution, HotSchedules Labor. You’ll work in a collaborative, international team with developers and QA engineers from Ukraine, Latin America, and the US. This role offers a great opportunity to strengthen your English skills, as many team meetings are held in English.

The team actively uses AI coding agents to speed up development and improve code quality. Candidates must be comfortable working with AI tools as part of their daily workflow.

Most engineers on the team are full‑stack developers, but current priorities lean more toward backend tasks. A solid background in backend development combined with practical front‑end experience (React 18, Redux) is required.

Responsibilities

• Develop new features based on the product backlog
• Build REST services for high-volume, low-latency web and mobile applications
• Design and implement database schema changes (MS SQL Server) and maintain Flyway migrations
• Maintain and refactor existing codebases, including legacy Backbone.js modules
• Troubleshoot and resolve production issues
• Collaborate with cross-functional teams to define, design, and deliver new features
• Leverage AI coding agents to accelerate development and enhance code quality
• Participate in code reviews and contribute to engineering best practices

Requirements

• Minimum 5 years of hands-on experience with Java
• At least 6 months of daily experience using AI coding agents (e.g., Claude Code, GitHub Copilot, Cursor) 
• Strong proficiency in the Spring Framework (Spring MVC, Spring Security, Spring JDBC)
• Experience with MS SQL Server and Flyway database migrations
• Practical experience with React 18/Angular, including Redux and component libraries (Material UI or similar)
• Experience with the Gradle build system
• Experience with AWS (S3, SQS, DynamoDB, Lambda) and Azure (Service Bus, Blob Storage) is a plus
• Working knowledge of Docker and Kubernetes is a nice-to-have
• Upper‑intermediate English or higher

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers