Вакансії Java Developer

We’re looking for a Senior Java Back End Engineer. Reporting to the Manager of Software Engineering, you’ll play a pivotal role in advancing the impact of our AdTech platform and delivering critical projects that bring significant value to operations. As a strong individual contributor, you will design and develop scalable systems, working directly with the architecture team and advising on broad technical decisions that impact our back-end tech stack. You will collaborate across technical pillars and provide expertise to guide junior team members, ensuring adherence to best practices through rigorous code and tech spec reviews.

About the project

illumin is a unique journey-based advertising platform that combines media planning and buying in an interactive and intuitive interface. It allows users to:

• Drag and drop audiences, creatives, and conditions onto a single-screen canvas
• Build campaigns across multiple channels, including Native, Display, Video, Connected TV, Audio, and social platforms like Facebook and Instagram
• Seamlessly sync first-party audiences with open web campaigns by connecting directly to email platforms
• Set alternative paths for unique audience segments
• Visualize and manage campaigns in real-time

How you will make an impact

• Be a key contributor. You will drive critical projects that deliver real value to our customers, contributing to platform and feature development on a large, distributed system that handles 1.5 million requests per second with 120ms response times. You will design and improve key components, focusing on performance and scalability, while monitoring code to ensure it meets user needs and business goals. You will tackle the most challenging production issues while being a role model for less experienced developers on the team.
• Guide technical decisions. You will lead decisions that shape the backend tech stack. You will work closely with stakeholders and senior engineers to solve technical challenges and optimize system performance. You will take ownership of projects, from planning to delivery, ensuring solutions address technical and business needs while tackling technical debt.
• Enhance Agile processes. You will participate actively in Agile Scrumban practices, breaking down tasks and collaborating in daily stand-ups. You will help the team navigate challenges, size efforts, identify improvements, and share insights that enhance project delivery from start to finish.
• Prioritize quality. You will participate in code reviews, analysis, and performance tuning. You will apply various automated testing methods in a continuous integration environment, resolving defects and bugs during pre-production, production, and post-release patches. You will directly influence the outcome quality by identifying process and behavioral gaps, suggesting and driving improvements to avoid, mitigate, or delegate risks.
• Mentor and grow the team. You will work with urgency, embrace mistakes, learn from them, and drive the team toward success. As a senior team member, you will offer guidance and coaching to junior developers and contribute to the team’s success at every opportunity. With time, you will also take part in the recruitment process of other engineers.

What you bring

• Technical expertise. You bring experience with Java and Spring, and have a deep understanding of building highly available, high-performance systems. You are skilled in optimizing web application performance across the stack, with hands-on experience in Kubernetes, Docker, and Microservices. You are comfortable working with relational databases and key-value stores, proficient in SQL, database schema design, and infrastructure, and familiar with NoSQL databases. Your expertise also extends to Unix/Linux environments, design patterns, and functional programming, with a working knowledge of networking, concurrency, and Big Data concepts (e.g., Hadoop, HDFS, or Druid).
• Experience. You are passionate about building technical solutions and thrive on simplifying complex challenges. You have worked closely with Product and Design teams to design, implement, and iterate on impactful end-to-end product experiences.
• Interpersonal skills. You take a collaborative approach and lead by example. You can translate complex technical details to non-technical audiences and build trusting relationships across teams, whether in-person or remotely. You adapt quickly when priorities shift, embrace feedback, and are comfortable navigating ambiguity. You value diverse experiences and perspectives.
• Growth mindset. You are naturally curious, eager to learn from others as well as independently. You acknowledge mistakes, learn from setbacks, and are resourceful in applying new knowledge to solve problems. You stay current with the latest tools and best practices, driven by a passion for continuous improvement.
• Language skills. English and Ukrainian languages at Upper Intermediate level or higher.

On behalf of our Client, a well-established financial institution from the Caribbean region Mobilunity is looking for a Java Developer.
Our Client is the largest bank in the Caribbean region that serves 14 countries/territories. The aim is to make this organization from a traditional bank into a new era of fintech, working on the edge of what current fintech may offer.

Responsibilities:

• Develop and maintain scalable and efficient backend services.
• Write clean, maintainable, and efficient code, adhering to best practices and coding standards.
• Develop and maintain RESTful APIs for integration with front-end services and external services.
• Integrate third-party services and maintain data integrity.
• Implement unit and integration tests to ensure robustness and reliability of backend services.
• Optimize applications for speed, scalability, and data security

Requirements:

• Proficiency in Java and corresponding frameworks.
• Strong knowledge of database technologies and web server technologies (e.g., Apache, Nginx).
• Familiarity with version control tools such as Git and experience with RESTful API development.
• Excellent problem-solving skills, communication skills, and attention to detail.
• Bachelor’s degree in computer science, Software Engineering, or related field.
• Level of English – Upper-Intermediate and higher.

Our mission at Geniusee is to help businesses thrive through tech partnership and strengthen the engineering community by sharing knowledge and creating opportunities. Our values are Continuous Growth, Team Synergy, Taking Responsibility, Conscious Openness and Result Driven. We offer a safe, inclusive and productive environment for all team members, and we’re always open to feedback. If you want to work from home or work in the city center of Kyiv, great – apply right now.

Requirements

• 7+ years of software engineering experience;
• 5+ years specifically in development;
• 3+ years architecting large-scale distributed systems;
• Strong experience with distributed stream processing frameworks similar to Apache Storm;
• Proven track record designing and implementing large-scale data processing architectures;
• Experience with pub-sub messaging systems and loosely coupled architectures;
• Working knowledge of SQL and NoSQL databases;
• Demonstrated understanding of DevOps practices, containerization, and CI/CD pipelines;
• Ability to create and defend complex design decisions with clear articulation of trade-offs;
• Experience optimizing system performance, memory usage, and disk access;
• Knowledge of caching strategies to improve response times and reduce costs.

What you will do

• Design and architect scalable, high-performance search components with focus on system trade-offs;
• Implement real-time data processing pipelines using and distributed streaming technologies;
• Collaborate with stakeholders to align technical solutions with business requirements;
• Contribute to system reliability, efficiency, and performance optimization.

Binariks is looking for a Senior Full-Stack Engineer (Java + React/TypeScript) to join our team and work on a comprehensive healthcare platform. This project unifies data, solutions, and services, enabling healthcare providers, payers, retail pharmacies, and technology companies to deliver seamless, personalized experiences. The platform supports over 150M people, leveraging 60K+ data connections and multiple integration options to address healthcare fragmentation.
This is a full-time position focused on Java (Spring Boot) and React/TypeScript.

What We’re Looking For:

• Strong expertise in Java with Spring Boot or other cloud-native frameworks
• Experience with React/TypeScript and micro-frontend architectures
• Solid understanding of AWS (EKS, Lambda, S3) and container orchestration (Docker/Kubernetes)
• Proficiency in SQL/NoSQL databases, caching (Redis), and load balancing
• Strong API design skills (REST, GraphQL)
• Experience with event-driven architectures and messaging systems (Kafka, RabbitMQ)
• Knowledge of observability, tracing, and cloud-native patterns
• Hands-on experience with microservices architecture and design
• Ability to create or review UML/class diagrams and other technical documentation
• Upper-Intermediate English and strong communication skills

Your Responsibilities:

• Develop and maintain scalable, high-performance applications using Java (Spring Boot) and React/TypeScript
• Design and implement microservices and event-driven architectures
• Optimize databases, caching, and API performance
• Work with AWS services and containerized environments (Docker, Kubernetes)
• Ensure high code quality, security, and observability
• Collaborate with cross-functional teams to design and document system architecture

Will Be a Plus:

• Experience working on healthcare projects

We are looking for a proficient Java Developer who is passionate about developing high quality software and collaborating with other like-minded team members that rely on your experience and technical background to deliver solutions quickly and efficiently.
Our Сlient is the industry leader in Digital Data Governance from the USA. They have empowered insights-driven companies to trust their data and create better experiences for their customers with analytics testing and data governance.
In this role, you will be responsible for the development and maintenance of our backend services (including services in Java and Scala languages and AWS Lambda in TypeScript), an automated web crawler, as well as managing our AWS infrastructure using Terraform.
You will participate in architectural and software development activities. The ideal candidate should be able to conduct software analysis, testing, and debugging, as well as recognize and solve production and non-production application issues.

Experience / Skills required:

• 3+ years of hands-on commercial experience in Java backend development using Java 8+ with streams and lambdas
• Experience with Spring Framework (Boot)
• Hands-on commercial experience with JavaScript/TypeScript (backend)
• Expertise in RESTful APIs
• Professional expertise in relational databases (MySQL)
• Hands-on experience with AWS or other cloud providers
• Experience developing with Unit and Integration tests
• Understanding of dry, solid, OOD principles
• Upper-Intermediate level of English

Good to have:

• Enterprise experience designing and developing software in fast-paced distributed environments (highly scalable, reliable, available)
• Experience debugging, performance profiling and optimization
• Experience with Snowflake database
• Message brokers (RabbitMQ or Amazon SQS preferred)
• Experience with AWS services such as SQS, Lambda, API Gateway, and S3
• Scrum/Kanban agile methodologies
• Continuous deployment and integration tools like CircleCI or Jenkins
• Experience with Docker
• Programming skills in Scala language with Akka

Responsibilities:

• Develop and maintain our backend services (primarily in Java and also in Scala)
• Manage corresponding AWS infrastructure with Terraform
• Optimize performance within services (code and DB queries) and across multiple services (infrastructure and communication)
• Be part of daytime on-call rotation to ensure operational excellence
• Compose technical designs for product features

Senior Fullstack Developer for Banking & Capital Markets competency gives you the opportunity to interact within international environment and work with the most recognizable and influential players on the market.

The opportunity

As Senior Fullstack Developer in Banking & Capital Markets Consulting you will participate in various streams of financial platforms implementation projects, collaborate with agile team members to achieve project and client goals and be a part of Business Transformations. We are looking for a passionate developer willing to move our projects on the new track! You will use the wide technology stack and have an opportunity to implement new solutions while working with top leaders in their industries. As a part of our global team, you will participate in international projects based on latest data technologies and cloud platforms.

Your key responsibilities

• Work in a dynamic, fast-paced environment that provides exposure to all areas of Finance
• Understand business needs, facilitating and developing process workflow, data requirements, and specifications required to support implementation
• Develop architecture, technical specifications, high level/detailed design and implementation plans from business requirements
• Manage end-to-end systems development cycle from requirements analysis, coding, testing, UAT and maintenance
• Exploring new and emerging technologies as needed by the project
• Mentor the project team in executing the identified projects.
• Willing to travel to the customers locations on need basis.

Skills and attributes for success

• Bachelor’s degree in computer science or related technical discipline.
• A strong problem solver, organized and able to work in a fast-paced environment with delivery focus as part of a global team.
• Excellent communicator who is comfortable engaging stakeholders, both verbally and written.
• Experience in Banking domain.

To qualify for the role, you must have

• 5+ years of relevant experience in software development, including a clear understanding of data structures, algorithms, software design, core programming concepts and experiences with CI/CD and DevSecOps.
• Excellent programming skills in Java.
• Full Stack experience with industry standard frameworks and tools (e.g. React, Angular, TypeScript, Spring Boot, Maven, Web/RESTful service development).

Ideally, you’ll also have

• Certificates proving certain skills: Java, Spring, SQL, AWS or Azure Cloud, Angular, React.
• Experience in agile / scrum methodology.
• Experience in any core banking platforms.
• Good understanding of Agile methodology.
• Experience in client facing roles.
• Experience with mobile app implementation.

What we look for

• Person able to work independently as Senior Fullstack developer.
• Willing to guide other team members.
• Willingness to learn and expand technical skills working in international environment and Agile methodology.

We’re opening the position of a Senior Java Developer to join the existing team working on our Customer’s project. Our Customer provides SaaS solutions that assist companies in optimizing their businesses. These solutions encompass business planning and execution, process automation and optimization. The Customer’s platform utilizes industry-leading artificial intelligence (AI) and machine learning (ML) for enhanced predictive capabilities and proactive disruption prevention across various businesses.

Responsibilities:

• Develop the back-end infrastructure and codebase to implement the defined APIs based on the logical data model
• Implement data access and manipulation operations (e.g., CRUD operations) for each data entity exposed by the APIs
• Ensure adherence to industry best practices, coding standards, and security guidelines during API development
• Review business requirements documents and translate them into technical specifications
• Work from technical specifications to independently develop, modify, and maintain moderately complex software products
• Complete regular reports (Zoho, Jira, Tenrox) and provide status updates (Daily Syncs, etc.)
• Participate in cross-functional team discussions in the technical advisory role
• Leverage the team’s existing tools, frameworks, and resources
• Consider overall customer experience, including DoD, quality, and performance, while working through tasks, projects, and code reviews
• Write well-researched documents with qualifying data to articulate a point of view
• Perform unit and system (manual, unit, FTs, integration, end-to-end) testing
• Follow the Agile process consistently
• Learn and properly follow software development processes in an Agile environment
• Conduct and participate in product reviews; be ready to demo the results of the user story/task completed within the Sprint
• Analyze and troubleshoot problems and make recommendations for remediation (addressing or correcting issues or problems)
• Investigate issues within own service in detail
• Make technical decisions under the supervision of more senior staff / Mentor
• Solve routine problems and escalate complex problems, issues, and risks to more senior technical staff
• Select frameworks and tools that can be used to solve problems
• Actively participate in discussions within the technology community to learn and bring new ideas to the table
• Develop skills in Computer Science and software languages through coaching, training, and mentoring from more senior staff
• Seek to get continuous stakeholder feedback through demos, discussions, and value delivery
• Act as a support shifter when required, providing technical assistance, investigating and resolving issues, and ensuring smooth operation of services during the assigned support shift

Requirements:

• Strong knowledge of Java SE (up to version 17)
• Good understanding of meta-driven programming and experience using it
• Knowledge of Spring Boot and the Microservices architecture
• Strong knowledge of SQL and basic experience with data persistence, including relational and NoSQL databases
• Experience with Kafka or strong experience with any other message broker
• Understanding and basic experience in writing REST services
• Good knowledge of JUnit and Mockito for testing
• Experience working with different data formats (e.g., JSON, XML, AVRO) and understanding schemas for some of these formats
• An ability to write efficient code to work with deeply nested hierarchical data structures
• Knowledge of design patterns
• Knowledge of cloud development technologies, e.g., Azure, Kubernetes
• Understanding of fundamental Engineering concepts and practices
• Understanding of Software Development Lifecycle (SDLC)
• Familiarity with Scrum and Agile methodologies
• Ability to size/estimate work and provide timelines for individual assignments
• Ability to work independently on assigned tasks while seeking support from senior staff when needed
• Strong problem-solving skills and the ability to navigate a large codebase efficiently
• Strong logical thinking and the ability to understand and effectively communicate ideas
• English level – Upper-Intermediate or higher

Will be a plus:

• Experience in writing medium-size OO-libraries for consumption by others – with good design, reasonably good documentation, and good naming conventions
• Knowledge of Snowflake
• Experience with writing OAS specifications
• Experience in writing interpreters, parsers, and code generators
• Knowledge of Jenkins, Maven, Gradle, and GitHub Actions
• Experience with CI/CD pipelines

We are looking for a Java Developer to join our team on a full-time basis for Slotomania, that is the #1 Social Slots Game in the world, the industry leader, the fact its huge player community loves so much makes it the best (#2 grossing games developer on Facebook and #1 grossing social games developer on iOS and Android), and Playtika’s flagman game.

Requirements:

• Deep knowledge of Java Core, Spring Framework Stack
• Deep knowledge of concurrency, resiliency, caching
• Experience with Microservice architecture
• Experience with NoSQL DB (key-value based, document-based)
• Experience with messaging frameworks(like Kafka)
• Experience in testing frameworks
• Understanding of Clean code principles
• Nice to have experience with reactive frameworks(Project Reactor)
• English Intermediate.

Our client started as a small team of developers determined to bring trust and transparency to car shopping. Since then, their innovation and go-to-market acceleration history has driven industry-leading growth.
The product is the largest and fastest-growing automotive marketplace, and they have been profitable for over 15 years. We are here for them to fulfill their mission and give people the power to reach their destination.

If you are

• Experienced in Java for back-end development
• Proficient in React.js for front-end development
• Capable of working in an Agile environment and collaborating with cross-functional teams
• Strong in problem-solving and communication skills
• Familiar with SQL databases (optional)
• Experienced in working with AWS services (nice to have)
• Knowledgeable in Terraform for infrastructure-as-code (a plus)

And you want to

• Develop and maintain full-stack applications using Java for the backend and React.js for the frontend
• Implement and enhance AWS self-service provisioning capabilities
• Collaborate with infrastructure teams to automate deployments using Terraform
• Ensure high code quality through testing, peer reviews, and best practices
• Troubleshoot and optimize system performance, security, and scalability
• Contribute to the full development lifecycle, from designing APIs to deploying infrastructure as code