Jobs Java

On behalf of our Client from Belgium, Mobilunity is looking for a Java Developer.

Our Client is a rapidly growing HR Tech company in Belgium. The company provides Search & Selection services to connect talent with companies and offers Digital Payroll solutions that support clients working with flexible employment models.

Responsibilities:

• Contribute ideas and actively participate in the innovation and product improvement process
• Design and implement well-structured, testable, and efficient back-end code (Java, Spring)
• Build and maintain RESTful APIs and integrations for web and mobile applications
• Design, optimize, and maintain PostgreSQL databases (Aurora on AWS)
• Develop modular, reusable services and libraries with future reuse in mind
• Implement and maintain a clear, well-defined application architecture following best practices
• Communicate daily with the team to coordinate development, share progress, and resolve blockers
• Ensure code quality through unit and integration testing, code reviews, and adherence to established coding standards

Requirements:

• 5+ years of relevant experience
• Experience with Java and Spring (Boot, Security, Core, JPA)
• Clean architecture, distributed system design and microservices architecture
• Experience with Spring Framework
• Experience working with PostgreSQL databases (preferably Amazon Aurora PostgreSQL)
• Confident level of English (at least upper-intermediate to handle all communications)

Nice to have:

• Experience with Angular
• Experience with AWS
• Experience with GitHub
• Experience with Jenkins and CI/CD pipelines
• Familiarity with Atlassian tools (Jira, Confluence) for ticket management and documentation

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 — https://dripify.com

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

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

Responsibilities:

• 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.

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

Work conditions:

• 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 Talent Acquisition Specialist (45-60 min) - ✅ AI interview test task BETA (15-30 min) - ✅ Interview with Engineering Manager (90 min) ✅ Final interview with Head of engineering (60 min) - ✅ Reference check - ✅ Offer

Who we are:

Adaptiq is a technology hub focused on building, scaling, and supporting R&D teams for high-growth product companies across a broad range of industries.
 

About the Product:

Our client is a leading online gaming operator developing a new transactional platform for user account management. The platform is being built from scratch and will operate in a highly regulated, high-volume environment, supporting millions of concurrent users.

It will process real-time financial transactions and must provide high availability, sub-second response times, strong data integrity, security, and complete auditability. A major technical challenge is ensuring stable performance and reliability during peak events and significant traffic spikes.

The team is looking for strong engineering expertise to help architect and develop a scalable, high-performance, and resilient backend platform while meeting strict security, regulatory, and compliance standards.
 

About the Role:

As a Senior Java Engineer, you will build and design the core backend services of the PAM platform from the ground up. You will take end-to-end ownership of features, covering technical design, implementation, automated testing, production monitoring, and release.

You will collaborate closely with Principal Engineers on architecture and key technical decisions, contribute to RFCs, and deliver production-ready solutions. The role offers a high degree of autonomy and direct influence on the platform architecture, together with responsibility for reliability, performance, and correctness within a critical financial system.
 

Key Responsibilities:

• Design and develop backend services using Java 17+ and Spring Boot or a similar framework, covering wallet transactions, ledger entries, payment orchestration, bonus mechanics, and account state management.
• Build REST APIs and event-driven integrations with Kafka or similar technologies for player-facing applications, operational tools, and external partners.
• Maintain system correctness and reliability through idempotent operations, well-defined transaction boundaries, explicit failure handling, and comprehensive unit, integration, and contract testing.
• Incorporate regulatory requirements directly into the platform, including KYC/AML checks, responsible gaming controls, and audit trails.
• Ensure production readiness through metrics, structured logging, distributed tracing, alerting, and participation in on-call rotations.
• Participate in technical design discussions and RFCs, conduct code reviews, and support and mentor other engineers.
• Integrate AI-assisted development tools into the daily engineering workflow while following established platform standards for prompts and context.
• Support the live migration from the existing third-party platform, including parity testing, data validation, and cutover coordination.
   

Required Competence and Skills:

• 5+ years of backend engineering experience with strong hands-on expertise in Java 17+ and a modern framework such as Spring Boot.
• Proven experience designing, building, and operating high-integrity transactional systems in areas such as payments, wallets, billing, banking, e-commerce, or gaming.
• Strong knowledge of relational databases such as PostgreSQL, including schema design, ACID transactions, locking, and query/performance optimization.
• Experience working with event-driven architectures and messaging technologies such as Kafka, RabbitMQ, or similar, including idempotency and retry mechanisms.
• Strong automated testing practices, including unit, integration, and contract testing as part of the regular development lifecycle.
• Practical production experience with containers, CI/CD pipelines, monitoring and telemetry, as well as troubleshooting production incidents.
• Solid knowledge of multi-threading, system architecture, and fault-tolerant design patterns.
• Good written and spoken English and experience collaborating effectively across distributed, multi-time-zone teams.
   

Nice to Have:

• Experience in iGaming, sports betting, fintech, or another regulated domain with high transaction volumes.
• Hands-on exposure to Kubernetes and AWS technologies, including VPC, IAM, EKS, and auto-scaling.
• Experience building systems with compliance requirements such as KYC/AML, responsible gaming, and auditability.
• Practical experience using AI coding assistants and agentic development workflows.
• Polish and/or Spanish language skills.
   

Why Us:

We provide 20 days of paid vacation per calendar year, in addition to the official national holidays of the country where you are based.

We offer full accounting and legal support across all countries where we operate.

We follow a fully remote work model and provide a powerful workstation, as well as access to a co-working space whenever needed.

Sii Ukraine is a subsidiary of Sii Poland — the leader in IT, engineering, and consultancy services with over 7500 IT experts in Poland and more than 250 prestigious customers. We are looking for ambitious and top-quality professionals to join our project teams.

Are you a Java Developer who also feels comfortable with DevOps and Azure? We might have an interesting opportunity for you! 🙂

We are looking for a Regular+ Java Developer who can combine strong backend development skills with knowledge of DevOps practices and cloud technologies.

Requirements:

• Commercial experience with Java
• Good knowledge of Spring / Spring Boot
• Experience with REST APIs and backend development
• Understanding of DevOps practices and CI/CD
• Hands-on experience with Microsoft Azure
• Experience with Docker and/or Kubernetes will be an advantage
• Good command of English

• Tax residence in Ukraine required

   

What we offer:

• 💻 100% remote work
• 🌍 International project and multicultural environment
• 🚀 Opportunities for professional development
• 🤝 Supportive team and modern technologies
• 📄 Cooperation based on Ukrainian FOP

Project Description:

You will join a Regulatory Reporting Platform within a large US investment bank. The platform is responsible for collecting, processing, and transforming large volumes of data from multiple internal systems to produce regulatory reports for 240 jurisdictions worldwide. In total, the platform supports around 10,000 reports across a wide range of regulatory, compliance, financial, and risk reporting areas.
This is a large-scale, business-critical data platform operating in a highly regulated environment, where data accuracy, quality, traceability, and timely delivery are essential. The team works on building and enhancing data pipelines, implementing reporting logic, ensuring data validation and reconciliation, and supporting the generation of complex regulatory outputs.
The project is delivered by a global distributed team with colleagues located in Ukraine, Poland, and the US, offering close collaboration with engineers, analysts, and business stakeholders across multiple regions.

Responsibilities:

- Design, develop, and maintain solutions for a large-scale Regulatory Reporting Platform
- Build and enhance data processing pipelines using Java and Apache Spark
- Implement scalable logic for data ingestion, transformation, aggregation, and enrichment from multiple internal data sources
- Develop and optimize batch processing jobs to support the generation of regulatory reports across multiple jurisdictions
- Ensure high standards of data quality, validation, reconciliation, and consistency throughout the reporting lifecycle
- Translate business and regulatory requirements into robust technical solutions
- Collaborate with business analysts, QA engineers, and cross-functional teams to deliver reporting functionality
- Investigate and resolve data and application issues in development, test, and production environments
- Improve application performance, scalability, and reliability for high-volume data processing workloads
- Contribute to the design and implementation of reusable components and engineering best practices
- Participate in code reviews, testing, and release activities to ensure high-quality deliverables
- Work closely with distributed teams across Ukraine, Poland, and the US in an agile delivery model
- Support continuous improvement of the platform, including monitoring, troubleshooting, and operational stability

Mandatory Skills Description:

- 6+ years of commercial experience with Java
+ 2+ years of experience with Spark
- Experience in designing and developing scalable, high-performance backend applications
- Good knowledge of SQL and working with large datasets from multiple data sources
- Strong problem-solving skills and ability to work effectively in a global distributed team

Nice-to-Have Skills Description:

- Experience in financial services, investment banking, or regulatory reporting projects
- Familiarity with data quality, reconciliation, and control frameworks
- Experience working with large-scale enterprise data platforms
- Knowledge of cloud environments and modern data platform architectures
- Understanding of CI/CD practices and automated deployment pipelines
- Experience working in Agile / Scrum teams within a distributed global setup

Recruitment process:

1. CV Review — the project team reviews your experience and its relevance to the position.
2. Technical Interview — a technical discussion with our interviewer.
3. Project Management Interview (PMI) — a discussion about your experience, communication, and project fit.
4. Karat Interview — the first technical interview with the client.
5. Client Interview — the final interview with the client’s project team.

Project Description:

Our Surveillance and Regulatory Technology division delivers innovative solutions that protect financial and reputational interests from potentially criminal or inappropriate behaviour. Through real-time sanction and embargo filtering, operational risk controls, and sophisticated fraud detection, our systems protect both clients and the organization, ensuring compliance with global regulations.
We are launching several new AI initiatives to integrate advanced machine learning and cognitive capabilities into our platforms. We are seeking a highly analytical Senior Software Engineer to participate actively in every phase of the software development lifecycle. In this role, you will help design and build modern applications, with a strong focus on implementing Large Language Models (LLMs), RAG systems, and agentic workflows.

Responsibilities:

• Application Development: Collaborate within a global, distributed team to build and deliver robust, scalable, and secure microservices and applications.
• AI & LLM Integration: Actively contribute to the development of new AI features, implementing LLM-based solutions, Retrieval-Augmented Generation (RAG) pipelines, and LLM agents.
• Full SDLC Participation: Engage in the entire software development lifecycle, from analysing requirements and brainstorming technical solutions to writing clean code, testing, and deployment.
• Quality & Automation: Embrace automated unit/integration testing (TDD/BDD) and modern CI/CD practices as standard engineering disciplines.

Mandatory Skills Description:

AI & Emerging Technologies
• Generative AI & LLMs: Solid conceptual and practical understanding of Large Language Models (LLMs).
• Advanced AI Architectures: Knowledge of Retrieval-Augmented Generation (RAG), LLM agents, and agentic architectures.
• AI Frameworks & Tools: Exposure to or experience with Spring AI, Python-based AI frameworks (e.g., LangChain, LlamaIndex), and cloud AI platforms such as Google Cloud Vertex AI.

Backend Engineering & Language Skills
• Java & Spring Boot (Strong Advantage): Prior experience with modern Java (Java 17/21) and the Spring Boot framework is highly preferred and considered a major asset, though candidates with strong backgrounds in other enterprise languages (such as Python) who are willing to work in a hybrid environment are welcome.
• Message-Driven Systems: Experience with data streaming and messaging technologies like Apache Kafka, IBM MQ, or equivalent tools.
• Cloud & DevOps: Practical experience with cloud-native application development (Google Cloud Platform experience is a strong plus) and container technologies (Docker, Kubernetes, or OpenShift).

Mindset & Methodology
• 3+ years of software engineering experience with a highly analytical and problem-solving mindset.
• Experience working in Agile environments (Scrum, Jira, Confluence).
• Commitment to high-quality code, testing standards (TDD/BDD), and modern CI/CD build chains (Maven, Gradle, Git, Jenkins/TeamCity).

Nice-to-Have Skills Description:

N/A

Languages:

English: B2 Upper Intermediate

Project Description:

Join our Development Centre in Bucharest and become a member of our open-minded, progressive and professional team. In this role you will be working on projects for one our world famous clients. You will have a chance to grow your technical and soft skills, and build a thorough expertise of the industry of our client. On top of attractive salary and benefits package, Luxoft will invest into your professional training, and allow you to grow your professional career.

As a Senior Backend Engineer you will be specifically responsible for developing backend services, supporting various applications and business requests as part of a global team.

We are seeking a skilled and collaborative Java Developer to join our engineering team. In this role, you will contribute to the design, development, and maintenance of our high-performance securitization platform. You will work within a modern microservices architecture, leveraging Spring Boot, robust messaging systems, and relational databases to deliver scalable and secure financial technology solutions

For this role, office attendance is 3 days per week.

Responsibilities:

· Feature Development: Design, build, and maintain efficient, reusable, and reliable Java code within a microservices architecture.

· Database Management: Write optimized queries and design schemas utilizing PostgreSQL.

· System Integration: Implement messaging and event-driven patterns using Pub/Sub systems.

· Code Quality: Adhere to clean code principles, conduct thorough code reviews, and write comprehensive unit/integration tests.

· Collaboration: Work closely with cross-functional team members to refine requirements, estimate tasks, and deliver features in an Agile environment.

· Develop new technology applications in partnership with Business and Operations stakeholders to transform the Issuance business

· Working in a global environment with distributed delivery teams developing micro services to meet the functionalities required by the business

· Participate in full development cycle

· Work with QAs and BAs on functional and non-functional requirements

· Collaborate with other teams to build systems and integrate them together

· Collaborate with the architects and engineering community to help define an architectural roadmap and individual solution designs that fit within that roadmap

· Support and enforce automated unit/integration testing as a standard development practice

· Ensure that the software built is reliable and easy to support in production

· Structure the delivery of program elements into epics & stories, and facilitate integration between various teams’ output for production releases, with support from BA, Architects, and Scrum Masters / Product Owners

Mandatory Skills Description:

· Java 21+: Strong proficiency in modern Java (Java 21 or higher), utilizing its latest language features and performance enhancements.

· Spring Framework: Hands-on experience with the Spring Boot ecosystem (Spring Boot 3.x, Spring MVC, Spring Data).

· Architecture: Proven experience building and deploying scalable microservices.

· Database: Solid experience with PostgreSQL (schema design, query optimization, and indexing).

· Messaging: Familiarity with event-driven architecture and Pub/Sub messaging patterns (e.g., Google Cloud Pub/Sub, Kafka, or RabbitMQ).

· Software Craftsmanship: Strong commitment to clean code, SOLID principles, and automated testing (JUnit/Mockito).

· Experienced in designing and developing Microservices systems using the following Tech Stack: Java, Spring Boot, Hibernate, Kubernetes, Helm, Maven, Git, Jenkins/TeamCity.

· Experienced in developing and deploying microservices leveraging cloud technologies. GCP knowledge.

· Strong technical vision and hands-on experience in software development and test automation, including BDD and TDD

· Experience building message-driven applications

· Prior experience working with Scrum practices and Agile software methodologies and tools (Jira, Confluence)

· Ability to develop reusable and performant clean code aligned with good architectural and design principles.

Nice-to-Have Skills Description:

· Cloud Platform: Hands-on experience with Google Cloud Platform (GCP) services (e.g., GKE, Cloud SQL, BigQuery).

🚀 AIMPROSOFT is looking for a Java Tech Lead / Solution Architect (React , Telecom) 

Aimprosoft, a fast-growing IT company, is looking for a Java Tech Lead / Solution Architect (React , Telecom) on a contract basis ( 4+ months) an international project in the Telecommunications / BSS-OSS domain. 

This is a senior hands-on role for an experienced Java engineer who combines solution architecture, technical leadership, and production development. You will join the project first, shape the technical foundation during discovery, and then lead a team of three Full-Stack Java Developers through the MVP delivery. 

The role is approximately 50% architecture and technical leadership / 50% hands-on production coding. 

🎯 About the project & role: 

The client is a UK wholesale internet service provider supplying broadband, Ethernet, and connectivity services to resellers and partners. 

The project is Phase 1 of a new customer and admin portal and integration platform (BSS/OSS) designed to replace manual and legacy processes and become the first production slice of the client's target platform. 

The technical environment includes: 

• Java & Spring Boot 
• React & TypeScript 
• Microservices and event-driven architecture 
• PostgreSQL 
• BPMN / workflow orchestration 
• OAuth2 / OIDC and Auth0 
• AWS 
• Docker and Kubernetes 
• CI/CD 
• TM Forum Open APIs 

🎯 Your key responsibilities will include: 

• Owning the solution architecture for the client portal and integration platform 
• Leading the initial technical discovery and helping define the MVP implementation approach 
• Designing domain models, APIs, integration flows, and event-driven components 
• Writing production Java / Spring Boot code, particularly for technically complex parts of the platform 
• Leading and mentoring a team of three Full-Stack Java Developers 
• Reviewing code and establishing engineering standards and quality gates 
• Guiding the React portal architecture and UI standards 
• Designing integrations with external and legacy systems 
• Making and documenting architecture decisions using ADRs and C4 diagrams 
• Working closely with DevOps and QA on AWS environments, CI/CD, contract testing, and integrations 
• Communicating directly with the UK client and third-party technical teams 
• Presenting technical progress through regular live demos 

🔥 What We Need From You: 

• Hands-on experience in the Telecommunications domain, ideally with ISP, BSS/OSS, broadband, order management, product catalogues, or service qualification 
• Experience with TM Forum Open APIs 
• 8+ years of commercial Java development experience 
• 2+ years as a Tech Lead, Solution Architect, or in a similar technical leadership role 
• Strong hands-on experience with Spring Boot 
• 3–4+ years of hands-on experience with React / ReactJS and TypeScript 
• English: Upper-Intermediate (B2+) / Advanced (C1) for direct communication with a UK client 
• Experience designing and delivering microservice and integration-heavy systems 
• Strong understanding of Domain-Driven Design (DDD) and event-driven architecture 
• Ability to review frontend code, guide React application architecture and contribute to frontend development when needed 
• Practical experience with reliability and integration patterns such as Transactional Outbox, idempotency, retries, and asynchronous processing 
• Experience designing REST APIs and OpenAPI-based contracts 
• Experience integrating with multiple external systems and third-party APIs 
• Practical experience with Camunda, Flowable, or a similar workflow / orchestration engine 
• Practical experience with OAuth2 / OIDC, Spring Security, and RBAC 
• Hands-on experience with AWS and containerized environments (EKS or ECS, Docker) 
• Understanding of CI/CD and modern software delivery practices 
• Experience with AI-assisted development tools such as Claude Code or Cursor 
• Experience leading developers through technical planning, code reviews, mentoring, and delivery 

📌 Nice to have: 

• Experience with PostgreSQL, Flyway, or Liquibase 
• Experience with Kafka or AWS SQS 
• Experience with Terraform or AWS CDK 
• Understanding of multi-tenant architectures 
• Experience with Auth0 
• Experience with telecom/network systems such as RADIUS, NetBox, or IPAM 
• Experience with UK broadband ecosystems such as Openreach, PXC, or CityFibre 
• Experience leading technical discovery phases or architecture spikes 

💼 What We Offer: 

• Official military deferment (reservation); 
• A competitive salary that appreciates your skills and experience; 
• Opportunity to join a strategically important pilot team with long-term project prospects 
• Work on modern cloud-native products that deliver real-world impact 
• Exposure to AI-powered development practices and enterprise-scale engineering 
• Open environment where your ideas, technical expertise are valued 

N-iX is a global software development service company that helps businesses across the globe create next-generation software products. Founded in 2002, we unite 2,400+ tech-savvy professionals across 40+ countries, working on impactful projects for industry leaders and Fortune 500 companies. Our expertise spans cloud, data, AI/ML, embedded software, IoT, and more, driving digital transformation across finance, manufacturing, telecom, healthcare, and other industries. Join N-iX and become part of a team where your ideas make a real impact.

Nowadays, finding a long-term job with an interesting project can feel like a real challenge.

But hey — if you're an experienced Technical Lead / Full Stack Engineer (Java + React), look no further!

Yes, it's real. You're not dreaming. Miracles do exist!

When it comes to our customer – a strategic partner of ours in the integrated Shipping Services. They have set themselves apart as an independent carrier with a fresh, unique approach. Their strategy as a global niche carrier offers distinctive advantages to customers worldwide. We have created a smart, efficient network that ensures stable, reliable services; and we have made it our mission to focus on the needs of our customers, which stand at the heart of all our decisions. The main idea of our product operates in select trades, where it has a competitive advantage and where it can provide superior service. We maintain a flexible partnership approach with other major carriers, and our new line structure is a much-needed alternative to customers concerned about the current alliance-dominated market.

Responsibilities:

• Guide, mentor, and foster the growth of full-stack engineers within the team, championing engineering excellence and XP practices.
• Lead the architectural design and technical direction of innovative full-stack applications, ensuring scalability, security, and alignment with business goals.
• Establish and champion high standards of code quality, testing (TDD/BDD), CI/CD pipelines, and robust DevOps practices.
• Act as a key technical point of contact, collaborating closely with product owners and stakeholders to translate complex requirements into actionable technical strategies.
• Direct full-stack development of innovative applications, remaining actively involved in writing code and remote pairing.
• Own the entire development cycle, including design, architecture, development, testing, and DevOps deployment.
• Foster a highly collaborative Extreme Programming (XP) environment featuring remote pairing and rapid feedback loops.

Requirements:

• BS degree in Computer Science or an equivalent combination of education and experience.
• Experience in technical leadership is a must.
• 6+ years of full-stack development experience.
• 6+ years of experience in the following technologies: Java, Spring.
• Proven experience with Functional Programming and Java Streams.
• 2+ years of experience in front-end development with React.
• Experience with developing a reactive UI (Reactive JS).
• 2+ years of experience in TDD/BDD development in the following frameworks: JUnit, Jasmine, Mockito, Protractor/Selenium.
• 2+ years of experience in microservices-based architecture and tools (Spring Boot/Cloud).
• AI experience 
• Experience in DevOps development and Jenkins (must).
• Experience in development in Kotlin – an advantage.
• Experience in designing, developing, and deploying cloud/hybrid-based solutions.
• Experience in developing and deploying in Container-based environments (Kubernetes, Cloud Foundry).
• Deep familiarity with the following design concepts: microservices, service discovery, circuit breakers.
• Strong leadership abilities with the capacity to appropriately prioritize, plan, and delegate complex work in a rapidly changing environment.
• Versatility and capability to switch easily between different tasks and technologies.
• Experience in assessing a broad range of information solutions and products.
• Strong critical thinker with an exceptional problem-solving aptitude.
• Excellent English skills - both verbal and written.

About the Role (Java)

We're looking for a curious and motivated Junior Backend Engineer to join our team. You'll be building backend services and REST APIs and working with AWS or Azure infrastructure.

Our projects use Python or C#, but since all of our code is written with AI, we are considering candidates with any OOP language, including JavaScript and Java. What matters is how you think about software: object-oriented design, APIs, and data.

We work in pairs — juniors are always paired with another junior or someone at a similar level, not just for code reviews, but for day-to-day coding, architecture decisions, and problem solving, with seniors close by whenever you need help. This is production work: you'll ship services that customers rely on, with the safety net of another teammate beside you.

The client is US-based, so the team works US business hours; for engineers in Ukraine, this means your working day ends around midnight Kyiv time. This role can be full-time or part-time, depending on your availability.

What You'll Work On

• Backend Services & APIs — build and maintain REST APIs and backend services for client platforms, with clear contracts and automated tests.
• AWS or Azure Infrastructure — work with cloud infrastructure on AWS or Azure, depending on the project.
• CI/CD using GitHub Actions or Azure DevOps pipelines.

Tech Stack

• Backend — Our projects use Python or C#, depending on the engagement. You do not need to know either one — all code is written with AI, and you'll learn the project's framework on the job.
• Cloud — AWS or Azure, depending on the engagement. Nice-to-have, not required.

Working Hours & Format

This role can be full-time or part-time, depending on your availability. It's fully remote. Our client operates on US business hours, so the schedule needs to align with US time zones — for engineers based in Ukraine, your working day will end around midnight Kyiv time.

Requirements

Solid fundamentals in OOP and comfort with at least one OOP language — it does not matter which.

Exposure to AWS or Azure is a plus, but not required — you'll pick up what you need on the job. We care more about your curiosity and attitude than your CV.

Project Description:

You will join a Regulatory Reporting Platform within a large US investment bank. The platform is responsible for collecting, processing, and transforming large volumes of data from multiple internal systems to produce regulatory reports for 240 jurisdictions worldwide. In total, the platform supports around 10,000 reports across a wide range of regulatory, compliance, financial, and risk reporting areas.
This is a large-scale, business-critical data platform operating in a highly regulated environment, where data accuracy, quality, traceability, and timely delivery are essential. The team works on building and enhancing data pipelines, implementing reporting logic, ensuring data validation and reconciliation, and supporting the generation of complex regulatory outputs.
The project is delivered by a global distributed team with colleagues located in Ukraine, Poland, and the US, offering close collaboration with engineers, analysts, and business stakeholders across multiple regions.

Responsibilities:

- Design, develop, and maintain solutions for a large-scale Regulatory Reporting Platform
- Build and enhance data processing pipelines using Java and Apache Spark
- Implement scalable logic for data ingestion, transformation, aggregation, and enrichment from multiple internal data sources
- Develop and optimize batch processing jobs to support the generation of regulatory reports across multiple jurisdictions
- Ensure high standards of data quality, validation, reconciliation, and consistency throughout the reporting lifecycle
- Translate business and regulatory requirements into robust technical solutions
- Collaborate with business analysts, QA engineers, and cross-functional teams to deliver reporting functionality
- Investigate and resolve data and application issues in development, test, and production environments
- Improve application performance, scalability, and reliability for high-volume data processing workloads
- Contribute to the design and implementation of reusable components and engineering best practices
- Participate in code reviews, testing, and release activities to ensure high-quality deliverables
- Work closely with distributed teams across Ukraine, Poland, and the US in an agile delivery model
- Support continuous improvement of the platform, including monitoring, troubleshooting, and operational stability

Mandatory Skills:

- 6+ years of commercial experience with Java
- Experience in designing and developing scalable, high-performance backend applications
- Good knowledge of SQL and working with large datasets from multiple data sources
- Strong problem-solving skills and ability to work effectively in a global distributed team

Nice-to-Have Skills Description:

- Spark and Hadoop knowledge
- Experience in financial services, investment banking, or regulatory reporting projects
- Familiarity with data quality, reconciliation, and control frameworks
- Experience working with large-scale enterprise data platforms
- Knowledge of cloud environments and modern data platform architectures
- Understanding of CI/CD practices and automated deployment pipelines
- Experience working in Agile / Scrum teams within a distributed global setup

Recruitment process:

1. CV Review — the project team reviews your experience and its relevance to the position.
2. Coderbyte Test — an online coding assessment.
3. Technical Interview — a technical discussion with our interviewer.
4. Project Management Interview (PMI) — a discussion about your experience, communication, and project fit.
5. Karat Interview — the first technical interview with the client.
6. Client Interview — the final interview with the client’s project team.

Required Skills:
- Strong proficiency in Java 8+, with solid hands-on experience in Spring Boot and Spring MVC.
- Experience in RESTful API design and development.
- Familiarity with SQL/NoSQL databases.
- Hands-on experience with Git, Maven/Gradle, and CI/CD pipelines.
- Experience working with API documentation tools like Swagger/OpenAPI.
- Knowledge of .NET.

Preferred Skills:
- Experience with Azure DevOps (ADO) or GitHub Actions.

Soft Skills:
- Strong analytical and problem-solving abilities.
- Excellent communication and teamwork skills.
- Ability to work independently and manage migration-specific tasks with minimal guidance.

Job Responsibilities

 Support and enhancement for 11 Java services – Microservice, Spring boot

Department/Project Description

Customer is one of the world's leading healthcare organizations, operating across 170+ countries with a strong focus on diabetes, obesity, and rare disease care. We are in managed service contract for 55+ AEM websites.

Responsibilities:

• Work in SCRUM team 
• Design and develop high-load microservices
• Produce high-quality code covered with different levels of tests
• Maintain services on production and assure their stability and performance
• Provide code review for teammates 
• Contribute to the Company’s development processes and practices 

Requirements:

• 5+ years of professional Java development experience, including at least 2 years in a product company or product-focused environment
• Proficiency in Java 17+ and modern backend development practices
• Solid experience with the Spring Framework and Spring Boot
• Practical experience designing and developing microservices
• Experience with MySQL, Redis, and other SQL or NoSQL databases
• Experience with Kafka and event-driven architectures
• Experience building REST APIs and working with Protobuf
• Hands-on experience with SQL and database schema design
• Experience with CI/CD practices and tools such as GitLab CI
• Ability to write unit and integration tests using tools such as Mockito, WireMock, and Testcontainers
• Strong understanding of SOLID principles, clean code, and common software design patterns
• Experience with Git and modern software development workflows
• Excellent troubleshooting and problem-solving skills
• Good communication and collaboration skills
• English proficiency at Intermediate level or higher

AI-enabled software development

• Hands-on experience using AI coding agents in day-to-day software development.
• Ability to break down engineering goals into clear, well-scoped tasks for AI agents.
• Ability to provide effective context, constraints, acceptance criteria, and validation steps.
• Strong awareness of the risks and limitations of AI-generated software.
• Ability to distinguish where AI can accelerate delivery and where human judgment is essential.
• Interest in exploring and improving agentic development workflows.
• Willingness to share effective workflows and lessons learned across engineering team.

Would be great to have:

• Experience with Aerospike
• Experience with Spring Cloud
• Experience with Docker and Kubernetes
• Experience developing and operating high-load distributed systems
• Experience with Google Cloud Platform (GCP) and its core services, including BigQuery

What we offer:

• International company with several offices in different locations : Tel-Aviv, Kyiv, Warsaw, Limassol.
• Granting an Option;
• A professional environment with great people to work with;
• Competitive salary, performance review;
• Flexible working hours, no one here tracks your work time because our culture is built on trust and cooperation;
• Social and welfare packages;
• 20 working days paid vacation, official public holidays and 100% sick leave coverage;
• Opportunities to make a difference, to develop and grow;
• Regular corporate celebrations, team building and fun activities;
• Comfortable office in the city center. Our Kyiv office is open 24/7 with all safety and health measures in place.

The Mission

Wallee Group is a leader in advanced payment solutions, dedicated to providing robust, scalable, and secure systems across multiple domains. We enhance customer experiences through innovative payment and finance technology that empowers businesses to grow efficiently. With operations spanning several countries, we thrive on collaboration and agility, utilizing the Scrum framework to drive our international teams. At Wallee, we stay at the forefront of market trends, continuously innovating to deliver premier services to our global customers.

The Role

To achieve our mission of providing the market's best payment experience, Wallee is seeking experienced and versatile java software engineers. As disruptors in the payment space, we build industry-leading systems that demand the highest standards of security and reliability. We are constantly pushing our solutions into new territories, and we are looking for engineers who thrive in a fast-paced, agile environment to help us redefine the future of finance.

Tasks

Your Impact

• Architect Scalability: Design and develop highly resilient back-end systems using Java, ensuring our infrastructure handles global scale with ease.
• Feature Innovation: Own the end-to-end lifecycle of new features, from initial implementation to refined bug fixing and performance tuning.
• Collaborative Engineering: Work closely with product managers, UX designers, and QA to translate complex business needs into elegant technical solutions.
• Code Excellence: Drive quality through automated testing, rigorous code reviews, and the creation of clear, maintainable technical documentation.
• Stay Ahead: Continuously research and evaluate emerging technologies and methodologies to keep Wallee at the cutting edge of the fintech industry.

Requirements

What You Bring to the Table

• Technical Depth: Advanced proficiency in Java and core frameworks such as Spring, Spring Boot, and Hibernate.
• Systems Thinking: Proven experience building distributed systems and scalable, high-availability solutions.
• Data Mastery: Strong proficiency in SQL and experience managing complex data structures.
• Modern DevOps: Hands-on experience with CI/CD pipelines (Jenkins/GitLab CI) and containerization (Docker, AWS ECS).
• Agile Mindset: A degree in Computer Science (or equivalent experience) and a track record of thriving in fast-paced, Agile environments.

• Bonus Points: Experience with JavaScript, Apache Camel, or BPM engines.

   

  Benefits:

• You are part of an agile, young international team and shape our products sustainably with your ideas.
• You will play a decisive role in designing products in an omni channel payment start-up and work with leading companies in the financial industry on international projects.
• We offer flexible structures and flat hierarchies.
• Cooperation with motivated colleagues and numerous personal development opportunities.

• Project Description:

  You will join a Regulatory Reporting Platform within a large US investment bank. The platform is responsible for collecting, processing, and transforming large volumes of data from multiple internal systems to produce regulatory reports for 240 jurisdictions worldwide. In total, the platform supports around 10,000 reports across a wide range of regulatory, compliance, financial, and risk reporting areas.
  This is a large-scale, business-critical data platform operating in a highly regulated environment, where data accuracy, quality, traceability, and timely delivery are essential. The team works on building and enhancing data pipelines, implementing reporting logic, ensuring data validation and reconciliation, and supporting the generation of complex regulatory outputs.
  The project is delivered by a global distributed team with colleagues located in Ukraine, Poland, and the US, offering close collaboration with engineers, analysts, and business stakeholders across multiple regions.

• Responsibilities:

  - Design, develop, and maintain solutions for a large-scale Regulatory Reporting Platform
  - Build and enhance data processing pipelines using Java and Apache Spark
  - Implement scalable logic for data ingestion, transformation, aggregation, and enrichment from multiple internal data sources
  - Develop and optimize batch processing jobs to support the generation of regulatory reports across multiple jurisdictions
  - Ensure high standards of data quality, validation, reconciliation, and consistency throughout the reporting lifecycle
  - Translate business and regulatory requirements into robust technical solutions
  - Collaborate with business analysts, QA engineers, and cross-functional teams to deliver reporting functionality
  - Investigate and resolve data and application issues in development, test, and production environments
  - Improve application performance, scalability, and reliability for high-volume data processing workloads
  - Contribute to the design and implementation of reusable components and engineering best practices
  - Participate in code reviews, testing, and release activities to ensure high-quality deliverables
  - Work closely with distributed teams across Ukraine, Poland, and the US in an agile delivery model
  - Support continuous improvement of the platform, including monitoring, troubleshooting, and operational stability

• Mandatory Skills Description:

  - 6+ years of commercial experience with Java
  + 2+ years of experience with Spark
  - Experience in designing and developing scalable, high-performance backend applications
  - Good knowledge of SQL and working with large datasets from multiple data sources
  - Strong problem-solving skills and ability to work effectively in a global distributed team

• Nice-to-Have Skills Description:

  - Experience in financial services, investment banking, or regulatory reporting projects
  - Familiarity with data quality, reconciliation, and control frameworks
  - Experience working with large-scale enterprise data platforms
  - Knowledge of cloud environments and modern data platform architectures
  - Understanding of CI/CD practices and automated deployment pipelines
  - Experience working in Agile / Scrum teams within a distributed global setup

• Languages:
  • English: C1 Advanced