Вакансії Java Developer

We are looking for a Software Engineer to join a HubSpot engineering team working on the development of the Marketing Events functionality within the HubSpot ecosystem. Our mission is to help marketers track the success of their events and improve lead engagement by collecting, processing, and storing data about events and attendees.
You’ll be involved in creating new features, maintaining and improving existing ones, and solving real user issues. Our team also owns and supports integrations with third-party platforms like Eventbrite and GoToWebinar, enabling seamless synchronization of event data with HubSpot. Right now, we’re also focused on redesigning the Marketing Events page and migrating to HubSpot’s new UI library, replacing outdated components with modern and consistent UI elements.
HubSpot has a great engineering culture, carried by great teams in the USA, Ireland, Germany, Ukraine, and Armenia. The platform consists of thousands of microservices built with Java 21, lightweight DropWizard framework, and Google Guice dependency injection. It’s huge and you’ll have to deal with a lot of other stuff like Apache Kafka, Amazon SQS, S3, MySQL, HBase, and much more. The front end consists of single-page applications built with ECMAScript 6, TypeScript, React, Redux, and Sass. The Platform Team has built state-of-the-art infrastructure that allows developers to deploy their code to QA and Production environments with just a few button clicks. This enables you to focus entirely on designing and developing software – there is nothing easier than triggering a build and merge here.
HubSpot has a great onboarding course where you will get in touch with HubSpot’s infrastructure and then with our integration. During this period you will be actively involved in our working process with onboarding buddy. When your trial is finished you are going to be involved as DRI (Directly Responsible Individual) on new features and in PagerDuty rotation.

Responsibilities

• Communicate directly with product management and peers in Boston and Dublin, other HubSpot development teams to shape out requirements
• Work on the front end using React, ECMAScript 6, and Sass, contributing to single-page applications and UI improvements using HubSpot’s new UI library
• Create new and extend existing microservices using Java 21, DropWizard, and whatever technology/tools required to complete a particular task
• Cover your code with all kinds of automation tests (unit, integration, acceptance, API, end-to-end)
• Fully own the software you’ve developed: design, develop, test, release, and support in both stage and production environments

Personal Profile Overview

• Degree in Computer Science, Software Engineering or related field
• Stability in previous employment history with a tendency to remain with employers for extended periods
• Experience in managing diverse project activities (not just coding, but also requirements analysis, preparing estimations)
• Clear and effective communication skills, both verbal and written, ability to convey ideas, information, and messages accurately and efficiently
• Proficiency in fostering effective collaboration and teamwork activities
• Ability to analyze information, assess situations, and make decisions based on sound reasoning and logical evaluation
• Focus on delivering exceptional customer experiences and prioritizing customer satisfaction
• Analytical thinking, problem-solving abilities, and strategic approach to technical challenges
• Transparency in sharing the information within a team and company
• Willingness to acquire new knowledge and insights to enhance professional growth and performance

Required Skills

• 3+ years working with Java and JavaScript
• Front-end development experience (React or other modern JS frameworks)
• Excellent understanding of the OO design/programming paradigm
• Solid background in computer science and programming
• Strong knowledge of databases and networks (HTTP/REST)
• Good understanding of unit testing/test automation
• Experience or strong knowledge in microservice architecture and message broker systems such as Kafka, Amazon SQS, etc.
• English Upper-Intermediate (B2)

As a Plus

• Strong learning and development abilities
• Ability to work from the office in Lviv

Rakuten Viber is one of the most popular and downloaded apps in the world. Working with us provides a unique opportunity to influence hundreds of millions of our users and to be part of the journey that makes us a super-app. Our mission is to make people’s lives easier by enabling meaningful connections, from precious moments with family and friends, through managing business relationships to pursuing their passions.

Responsibilities:

We are a global team of engineers dedicated to creating the best tools to ensure safe, convenient, and fun communication for millions of users worldwide. Our culture is built on innovation, teamwork, and a commitment to excellence. We offer a unique opportunity to work with cutting-edge technologies, including microservices architecture, and influence the lives of millions of people.
As a Backend Developer at Viber, you will be involved in developing and maintaining high-traffic with over 1 billion messages a day and dozens of scalable services, ensuring the fast and reliable operation of our platform. Your tasks will include developing new features, optimizing performance, ensuring data security, and solving complex technical challenges within our microservices architecture, using a combination of Java, along with non-blocking and reactive approaches, Cloud services, and NoSQL databases.

Requirements:

• 5+ years of experience in server-side development using Java;
• Experience in Java reactive programming (such as Vertx, RX);
• Advanced knowledge of unit testing frameworks and mocking;
• Knowledge of cloud technologies;
• Experience with microservices development based Kubernetes;
• Experience with Agile methodology;
• Striving for new knowledge and skill improvement;
• Intermediate+ in written and spoken English (interviews in English);
• Excellent oral and written communication skills.

Advantages:

• Experience with NoSQL database (such as Couchbase, MongoDB);
• Higher technical education.

We are looking for a Senior Java Developer to contribute to the development of cloud-native solutions, ensuring scalability, performance, and security. In this role, you will work in a highly collaborative team, building robust and efficient backend services while closely interacting with frontend engineers.
Our client, backed by leading VCs, is a team of experienced payment and tech industry professionals redefining business banking and transforming how companies in Australia and the UK receive payments. The company is developing innovative financial products and building a strong engineering team to challenge established competitors.

Responsibilities:

• Design, develop, and maintain scalable cloud-native backend solutions on AWS using Java Spring and TypeScript.
• Collaborate with cross-functional teams to translate business requirements into technical solutions.
• Ensure high availability, security, and performance of microservices-based applications.
• Optimize and enhance existing systems to improve efficiency and reliability.
• Contribute to API design and integration strategies, ensuring smooth communication between services.
• Work closely with frontend engineers to ensure seamless interaction between backend and UI components.
• Participate in code reviews, knowledge sharing, and mentorship within the team.
• Proactively identify and address technical challenges to drive continuous improvement.

Job Requirements:

• 5+ years of experience in Java development with Spring Boot;
• Proven experience working in AWS cloud-native architecture (Lambda, API Gateway, DynamoDB, S3, etc.);
• Hands-on experience with TypeScript;
• Strong knowledge of microservices architecture and distributed systems;
• Experience with NoSQL databases and modern storage solutions;
• Solid understanding of API design, security protocols, and best practices;
• Excellent problem-solving skills and ability to work effectively in a team-oriented environment;
• Strong communication and interpersonal skills, with a proactive mindset;
• English level at least upper-intermediate.

We are looking for a highly skilled Back End Java Engineer to join our online web services team, contributing to the development of scalable and efficient backend solutions.

Essential functions

• Design, implement, and maintain scalable web applications.
• Build and optimize backend APIs and frontend interfaces.
• Work with cloud platforms (AWS, GCP) and containerization tools (Docker, Kubernetes).
• Design and optimize databases (SQL and NoSQL), including large-scale technologies such as Redis, Cassandra, Voldemort, or similar.

Qualifications

• Proven ability to design, implement, and maintain scalable web applications.
• Experience building and optimizing backend APIs and frontend interfaces.
• Proficiency in the Agile software development lifecycle.
• Hands-on experience with cloud platforms (AWS, GCP) and containerization tools (Docker, Kubernetes).
• Proficiency in Java backend programming languages.
• Familiarity with databases (SQL and NoSQL) and experience in database design and optimization.
• Proven work experience with large-scale technologies such as Redis, Cassandra, Voldemort, or similar.
• Availability to work with up to 8 pm EET overlap.

Kyivstar TV invites a Java Developer (middle) to ensure the development of projects and support work processes in the company.

Required skills:

• 3+ years of commercial strong Java experience, Java 8+ knowledge;
• experience with Spring framework not SpringBoot, also (SpringBoot, Data, Security);
• experience with MongoDB, Redis;
• experience with search engines (Elasticsearch, Solr);
• experience with Docker (mandatory) and Kubernetes (advantage);
• experience with message brokers (RabbitMQ, SQS/SNS);
• knowledge of SOLID/GRASP OO design principles;
• understanding of tomcat servlet container;
• experience in clean code techniques, refactoring and testing.

Nice to have:

• Experience in Cloud Computing Platforms (AWS/aws-sdk);
• Java or any cloud Certification;
• experience in working with distributed and high-availability systems;
• ability to adopt new technologies fast;
• excellent communication, attitude and teamwork skills;
• ability to function both independently and in a large team;
• passion towards making great products.

Responsibilities:

• development of new functionality for the platform;
• optimization of current functionality;
• сovering existing code with tests;
• analysis and data collection for further decision-making on optimization of certain parts of the application;
• refactoring existing code / refactoring modules;
• migration from jersey servlet api to spring web api;
• migration from Morphia to Spring Data;
• migration from Scala to Java;
• business requirements analysis and solution planning;
• writing technical documentation / working on diagrams of system components;
• participation in the design and optimization of architectural solutions;
• manual testing (dev-testing) to establish that each element of the software meets the requirements and identifying defects.

The project's purpose is to develop a comprehensive sophisticated solution to drive negotiations between USA healthcare system players.
Key technical aspects: Complicated code base, service-oriented architecture, infrastructure as a code, low downtime, SOC2 compliance, release planning.

Job highlights:

• Possibility to work with microservice architecture using modern technologies.
• Possibility to work in an agile team using scrum methodology.
• Development is being done in accordance with all quality standards.
• An opportunity to work as a full-stack developer at will.

Responsibilities:

• Developing new functionalities with well-written acceptance criterias.
• Communication with a client about new features, and their feasibility.
• Preparing technical acceptance criterias for stories.
• Designing technical solutions for different client initiatives.

Qualifications:

• 4+ years of software development experience;
• Experience with Java & Spring framework;
• Understanding the principles of OOP, SOLID and the ability to apply them in practice;
• Knowledge of the principles of clean code and the ability to apply them;
• Secure Coding Practices;
• Experience in unit- or system testing;
• Experience with DB (PostgreSQL, MSSQL, MySQL, etc.);
• Level of English Upper-Intermediate and above.

About the Product:

proteanTecs is a game-changing startup redefining the way advanced electronics monitor their own health. In a world driven by AI, cloud computing, and autonomous systems, reliability isn’t optional – it’s essential. But how do you ensure peak performance and prevent failures before they happen?
That’s where proteanTecs comes in. The product provides real-time visibility into next-gen chips while they operate, using cutting-edge on-chip monitoring, machine learning, and predictive analytics. The technology helps companies build smarter, more resilient, and more efficient computing systems – eliminating blind spots and unlocking deep insights like never before.
The solution is already trusted by industry leaders in data centers, automotive, communications, and consumer devices.

About the Role:

proteanTecs is looking for a talented Senior Java Engineer to join the ride as we spearhead the next revolution in electronics. Your work will directly contribute to making electronics smarter, safer, and more reliable – powering everything from data centers to autonomous vehicles. As part of a fast-paced startup, you’ll take on diverse challenges, adapt quickly, and see your solutions shape the future of technology. You will be involved in end-to-end feature delivery alongside a team of 200+ industry-leading professionals who are passionate about innovation and knowledge-sharing. You’ll be working with cutting-edge tools, machine learning models, and advanced platforms to push the boundaries of what’s possible.

Key Responsibilities:

• Develop and maintain robust, scalable, and secure Java-based software solutions
• Collaborate with product managers, architects, and other engineers to design and implement new features
• Build and optimize data processing pipelines for high-volume analytics applications
• Ensure software quality through code reviews, unit testing, and integration testing
• Participate in architectural decisions, contributing to the design of cloud-based systems
• Monitor and optimize system performance to meet scalability and reliability goals
• Troubleshoot, debug, and resolve issues in development, staging, and production environments.

Required Competence and Skills:

• BA or B.Sc in Computer Science or an equivalent field
• 5+ years of hands-on experience in Java development
• Strong understanding of object-oriented programming, design patterns, and clean code principles
• Familiarity with database systems (SQL/NoSQL) and query optimization techniques
• Knowledge of cloud platforms (AWS, Azure, GCP) and microservices architecture
• Experience with Spring Boot and the Spring Framework ecosystem
• Experienced with JPA (Hibernate – advantage)
• Strong understanding of REST API
• Excellent problem-solving skills and a proactive attitude
• Strong communication skills and the ability to collaborate in a team environment

Nice to have:

• Experience with Python is a strong advantage
• Experience with streaming or messaging services (Kafka, RabbitMQ)
• Knowledge of monitoring tools such as Grafana, Prometheus, or ELK Stack
• Hands-on experience with containerization and orchestration (Docker, Kubernetes)
• Familiarity with big data technologies like Apache Flink or Spark
• Experience in performance optimization and distributed systems.

We are looking for Hybris Developer (Junior/Middle/Senior).
We work in several areas, IT consulting, software development, development and provision of different types of IT solutions.

Job Descriptions:

• 1,5+ years experience in Java, spring, and other enterprise-related technologies.
• At least 1 year of experience with SAP Hybris.
• Experience in writing unit tests.
• Strong skills to write maintainable code utilizing OOP and SOLID principles.
• Comfortable researching and adopting new web technologies.
• Intermediate level of English for verbal and written communication.
• To be a team player who wants to learn and to be challenged.

Would be a plus:

• Experience with digital commerce platforms including Oracle ATG and Magento.
• Experience with RDBMS Oracle/SQL Server/MySQL/MongoDB.

If you are passionate about knowing that what you do is important and that what you create matters, then we have the right job for you. Value is not just an empty word to us here at Materialise — it means developing software solutions to help people walk, run, and jump again. It means engineering to help customers develop better products and add more functionality. Materialise Medical has pioneered many leading medical applications of 3D printing, enabling researchers, engineers, and clinicians to revolutionize innovative patient-specific treatment that helps improve and save lives. As an engineer, you will be responsible for implementing features and ensuring they meet rigorous quality standards of medical software, resulting in a product that is used by surgeons around the world.

What you will do:

• Participate in technical discussions and bring new ideas to the table.
• Design, implement, test, deploy, maintain, and improve our software components and services.
• Own the quality of your code (i.e., unit tests, TDD, and other test methodologies).
• Work with product managers, functional analysts, and architects to design and specify new features from the engineering standpoint.
• Embrace and use state-of-the-art new technologies.
• Author internal tools that improve the team’s quality and productivity.
• Contribute to the positive, solution-focused, and creative team spirit.
• Work closely with other software engineers to optimize the design, quality, and functionality of the product.

Your profile:

• Bachelor’s degree in computer science, Engineering, or a related field;
• Good coding skills using OOP languages like C#, Java, or similar;
• Good understanding and practical experience of OOP, OOP Design Patterns;
• 3+ years of industry experience designing, building, testing, and shipping software;
• Exceptional problem-solving skills;
• Good communication skills;
• Coding skills in Typescript (will be a plus);
• Mathematical background (i.e. understanding of Vertex and Matrix algebra) (will be a plus);
• Proficiency in both written and spoken English;
• Desire to work in teams where collaboration and knowledge sharing are the way to meet common goals;
• It is crucial that you can see your contributions as part of a larger team: how does your solution fit into the overall product and will it meet its needs in the best possible way? This skill combines the ability to break down tough problems, creative thinking, and hard work, to turn these challenges into solutions.