Jobs Java

• Project Description:

  Join a Team Redefining Modern Banking Technology!
  
  Our client is a Swiss bank focused on delivering advanced online trading and financial services. Unlike traditional financial institutions heavily dependent on legacy systems, this bank invests in a lean, modern, and continuously evolving technology stack.
  
  What the Project Is About
  The team is responsible for all post‑market Forex operations, ensuring that trading activities are accurate, consistent, and properly reconciled after the end of each market day.
  One of the latest initiatives delivers near real‑time reconciliation of trade data from multiple sources, including Coinbase, Bitstamp, and Kraken. The solution enables live monitoring of risk exposure, especially during external platform downtimes or degraded availability.
  
  Technology & Engineering Culture
  We continuously evolve our systems toward:
  * Atomic, independently deployable microservices
  * Self‑contained applications with clear ownership
  * Dockerized environments
  * Automated CI/CD pipelines
  Engineering decisions focus on reliability, transparency, and scalability, supporting business‑critical banking systems.
  
  How We Work
  Scrum teams of 5-8 cross‑functional engineers. Each team member contributes to both backend and frontend components.
  
  Daily collaboration with client stakeholders through:
  * Stand‑ups
  * Refinement and design sessions
  * Status and planning meetings
  Agile best practices applied across delivery
  
  Primary communication tools:
  * Microsoft Teams
  * Outlook and internal collaboration platforms
  
  What We Offer
  + Professional growth
      Local trainings, workshops, and on‑demand webinars
      Company‑funded conferences and certifications
  + Competitive compensation
      Annual review based on performance and professional development
  + Healthy work-life balance
      Team buildings and corporate events
      Hackathons and innovation initiatives
      A culture that values sustainable delivery
  
  If you are proactive, creative, and motivated by building robust banking systems with real business impact, you will contribute directly to improving both product quality and engineering practices.
  Join us and help shape modern banking solutions.

   

• Responsibilities:

  * Design and develop product features end‑to‑end, covering frontend, backend, and data layer
  * Develop reusable, maintainable, and well‑tested code following team standards
  * Write and maintain unit, integration, and E2E tests to ensure reliability and scalability
  * Participate in code reviews, provide constructive feedback, and improve overall code quality
  * Collaborate with other engineers to clarify requirements and propose technical solutions
  * Take ownership of assigned features from requirements refinement to production deployment
  * Actively participate in Scrum events (planning, refinement, reviews, retrospectives), including direct communication with the client
  * Identify and address technical debt within owned areas of the codebase

   

• Mandatory Skills Description:

  - At least 3+ years of proven experience in a Software Developer/Engineer position [up to 1 year of work with Web Development stack]
  - Java core, Java 11-21 features
  - Proven knowledge of ReactJS, Redux
  - OOP/OOD knowledge, Design Patterns
  - Unit testing frameworks (JUnit, Mockito)
  - Integration tests
  - Spring framework, IOC
  - RESTful services
  - SQL knowledge, any RDBMS
  - CI tools experience

• Project Description:

  Join a Team Redefining Modern Banking Technology!
  
  Our client is a Swiss bank focused on delivering advanced online trading and financial services. Unlike traditional financial institutions heavily dependent on legacy systems, this bank invests in a lean, modern, and continuously evolving technology stack.
  
  What the Project Is About
  The team is responsible for all post‑market Forex operations, ensuring that trading activities are accurate, consistent, and properly reconciled after the end of each market day.
  One of the latest initiatives delivers near real‑time reconciliation of trade data from multiple sources, including Coinbase, Bitstamp, and Kraken. The solution enables live monitoring of risk exposure, especially during external platform downtimes or degraded availability.
  
  Technology & Engineering Culture
  We continuously evolve our systems toward:
  * Atomic, independently deployable microservices
  * Self‑contained applications with clear ownership
  * Dockerized environments
  * Automated CI/CD pipelines
  Engineering decisions focus on reliability, transparency, and scalability, supporting business‑critical banking systems.
  
  How We Work
  Scrum teams of 5-8 cross‑functional engineers. Each team member contributes to both backend and frontend components.
  
  Daily collaboration with client stakeholders through:
  * Stand‑ups
  * Refinement and design sessions
  * Status and planning meetings
  Agile best practices applied across delivery
  
  Primary communication tools:
  * Microsoft Teams
  * Outlook and internal collaboration platforms
  
  What We Offer
  + Professional growth
      Local trainings, workshops, and on‑demand webinars
      Company‑funded conferences and certifications
  + Competitive compensation
      Annual review based on performance and professional development
  + Healthy work-life balance
      Team buildings and corporate events
      Hackathons and innovation initiatives
      A culture that values sustainable delivery
  
  If you are proactive, creative, and motivated by building robust banking systems with real business impact, you will contribute directly to improving both product quality and engineering practices.
  Join us and help shape modern banking solutions.

   

• Responsibilities:

  * Design and develop product features end‑to‑end, covering frontend, backend, and data layer
  * Develop reusable, maintainable, and well‑tested code following team standards
  * Write and maintain unit, integration, and E2E tests to ensure reliability and scalability
  * Participate in code reviews, provide constructive feedback, and improve overall code quality
  * Collaborate with other engineers to clarify requirements and propose technical solutions
  * Take ownership of assigned features from requirements refinement to production deployment
  * Actively participate in Scrum events (planning, refinement, reviews, retrospectives), including direct communication with the client
  * Identify and address technical debt within owned areas of the codebase

   

• Mandatory Skills Description:

  - At least 3+ years of proven experience in a Software Developer/Engineer position (up to 1 year of work with Web Development stack)
  - Java core, Java 11-21 features
  - Proven knowledge of ReactJS, Redux
  - OOP/OOD knowledge, Design Patterns
  - Unit testing frameworks (JUnit, Mockito)
  - Integration tests
  - Spring framework, IOC
  - RESTful services
  - SQL knowledge, any RDBMS
  - CI tools experience
   

• Nice-to-Have Skills Description:

  - Education: Bachelor's / Master's degree in computer science or computer engineering
  - Experience in finance/banking business domain
  - Unix usage experience
  - Kafka

   

• Languages:
  • English: B2 Upper Intermediate

Summary

• Senior Java Engineer with extensive experience in Hibernate, SQL, PostgreSQL, and Redis, specializing in high-performance, scalable applications;
• Expertise in AWS services (EC2, S3, RDS) and microservices architecture, with integration of Stripe payment systems in multiple projects over 3+ years;
• Skilled in clean code principles, unit testing, and software design patterns;
• Strong background in the real estate and financial domains, with additional AI experience enhancing solution innovation;
• Direct hire model;
• Duration: Long term;
• Start: ASAP;
• Locations: Bulgaria, Romania, Poland

Job Description

We’re looking for a Senior/Expert Java Engineer to join a cross-functional team building a scalable, modern platform in the real estate and financial domain. The product operates across multiple regions and is активно evolving, with a strong focus on performance, scalability, and continuous feature development.

What you’ll do

• Design, develop, and maintain high-performance Java-based applications;
• Collaborate with cross-functional teams to deliver scalable and reliable solutions aligned with business needs;
• Contribute to architectural decisions and drive best practices in software development;
• Review code, mentor engineers, and help maintain high code quality standards;
• Evaluate and introduce new technologies to improve system performance and team efficiency;
• Support the platform’s scalability, resilience, and ongoing feature expansion.

What we’re looking for

• Strong experience with Java and backend development in production environments;
• Hands-on experience with relational databases (e.g., PostgreSQL) and SQL;
• Experience working with caching solutions (e.g., Redis);
• Solid understanding of microservices architecture and distributed systems;
• Experience with cloud platforms (AWS preferred: EC2, S3, RDS);
• Familiarity with ORMs (e.g., Hibernate);
• Experience integrating with payment systems or third-party financial services;
• Strong understanding of clean code principles, design patterns, and testing practices;
• Ability to balance technical and business perspectives when making decisions.

Nice to have

• Experience with NoSQL databases (e.g., MongoDB);
• Exposure to AI-related technologies or data-driven systems;
• Previous experience in domain-driven or high-scale platforms.

Additional expectations

• Potential to grow into a technical leadership role;
• Strong collaboration skills and team-oriented mindset;
• Ability to work in a dynamic, evolving environment.

Location requirement: The consultant MUST be based in Nearshore EU and willing to travel to Geneva offices 1–2 times per year (≈1 week per visit). !!!
Start date: Mid–end of April 2026
Duration: Until end of 2026 (extension highly probable)
Engagement: Full-time (CET time zone)
Seniority: 10+ years
English: B2+
Interview: general and a technical interview

Role Overview
You will join our team within the Solutions Design and Delivery Section, contributing to the continuous improvement of critical software applications.
This is a hands-on senior role requiring full-stack development expertise and the ability to operate autonomously across the entire software lifecycle.

Mandatory Requirements (Must-have – no exceptions) !!!
Candidates must meet all of the following:

• 10+ years of hands-on experience in Java-based software development
• Strong experience with Java, Spring (Spring Boot), JEE, JPA, Hibernate, Maven
• Minimum 3 years of solid experience with Angular
• Strong knowledge of HTML, CSS, JavaScript
• Experience with relational databases (preferably Oracle)
• Proven experience in designing, developing, and deploying enterprise-grade applications
• Strong computer science fundamentals
• Excellent communication skills in English (spoken and written)
• High attention to detail and code quality
• Demonstrated ability to work effectively in a team environment
  
  Nice-to-Have (Adds strong advantage)
• Experience with AWS services and deployment automation
• Familiarity with Docker
• Experience with JIRA, Confluence, Bamboo
• Experience in QA / testing practices
• Experience with Agile/SCRUM environments
• Familiarity with data management concepts

Key Responsibilities

• Design, develop, maintain, and support full-stack applications
• Contribute to architecture and technical decisions
• Write clean, testable, high-quality code (unit & functional tests required)
• Analyze and translate business requirements into technical solutions
• Collaborate with cross-functional stakeholders
• Participate in code reviews, mentoring, and knowledge sharing
• Ensure maintainability, scalability, and performance of systems
• Produce technical and user documentation
• Follow established development practices (JIRA tracking, CI/CD pipelines, etc.)
  
  Work Context
  Due to the continuous growth in system usage (applications, renewals, decisions, updates), the platform requires ongoing technical enhancements across both front-office and back-office systems.
  You will play a key role in ensuring reliability, scalability, and long-term maintainability of these systems.

We are looking for a Senior Scala + Java Engineer to join a leading European online car marketplace with over 30 million monthly users across 18 countries. In this role, you will work on high-load, distributed systems, helping to build scalable, event-driven backend services that power a product used by millions of users daily. You will have a direct impact on system architecture, performance, and reliability, while working with modern technologies and functional programming principles.

Responsibilities:

• Design and develop scalable backend services using Scala and Java (Scala as the primary language).
• Build and maintain event-driven, distributed systems using Kafka.
• Model complex business domains with strong type systems and functional programming concepts.
• Contribute to architecture decisions around concurrency, streaming, and data consistency.
• Write clean, testable, and maintainable code following best engineering practices.
• Improve CI/CD pipelines, observability, and system reliability.

• Collaborate closely with cross-functional teams including product and platform engineers.

   

Requirements:
 

• 5+ years of backend development experience with Scala and Java (strong focus on Scala).
• Solid experience with Spring Boot.
• Hands-on experience with event-driven architecture (Kafka).
• Strong knowledge of the Typelevel ecosystem.
• Deep understanding of:
  • Functional programming principles;
  • Effect systems (Cats Effect);
  • Type classes & higher-kinded types;
  • Pure vs impure boundaries.
• Experience building distributed systems.
• Strong understanding of concurrency and asynchronous programming.
• Upper-Intermediate English or higher.

The product company is looking for a Java developer.

It is a successful market leader, a live-streaming Platform with 450+ Million registered users. It allows millions of talented people worldwide to connect with their fans and monetize their talents.

The company was founded in 2018 in the USA and is powered by 350+ global employees.

The position is hybrid (office in Limassol).

They offer: 

- options and performance review bonus, 

- 21 working days of paid vacation, plus 100% paid sick leave, 

- comprehensive social and welfare packages, 

- medical insurance (100% for employees and 75% for family members), 

- daily meals in the office, 

- Greek lessons.

Requirements: 

- experience with Java, SQL, Kafka (or alternative).

We power people’s progress.

At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact.

We’ve just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. Today, 100,000+ tutors teach 90+ languages to learners in 180 countries - and we’re only getting started. As a category-defining company, we’re shaping what the future of learning looks like at global scale.

Meet the team!

Join Preply’s Teams and help us power people’s progress through life-changing learning experiences. We’re on a mission to combine the magic of the best tutors with cutting-edge AI to create personalized journeys that keep learners motivated and inspired. The Preply Engineering Team provides the tools to help unlock human potential through learning.

Our team builds scalable, resilient applications using the powerful combination of Python/Django on the backend and ReactJS on the frontend — all to deliver an exceptional, seamless experience to our users.

We’re proudly tech-agnostic, meaning we’re open to candidates with a variety of technical backgrounds, whether that’s Java/Spring, Node.js/Express, Ruby on Rails, Scala/Play, PHP, or Golang. While Python is our main language, prior experience with it isn’t required. What matters most is your willingness to learn, your ability to adapt quickly, and your enthusiasm for using Python in product-focused development.

We implement A/B tests to prove the value of our initiatives and improve our product based on data and students' and tutors' feedback. As part of our commitment to ensuring high-quality products, we prioritize monitoring and metrics analysis to identify areas for optimization and ensure our services are performing at their best. 

At Preply, we release our product 50-60 times per day by leveraging top-notch CI/CD processes. As a fast-growing company we have diverse technical challenges (sometimes we even write about them on our Engineering Blog) that will allow you to develop your skills at scale. 

What you’ll be doing:

You will work in a cross-functional team alongside the Product Manager, Product Designer, UX Writers, Data Analytics, Technical Leads, Engineers and other cross-functional team members to deliver engaging features through A/B tests and build top-notch products, including, but not limited to:

• Develop and own backend features using Python/Django, supporting the creation of new backend services as well as design, create, and/or troubleshoot integrations with third-party vendors.
• Think beyond the code and about our customers, understand their needs, and define solutions with the team;
• Balance short-term speed of development with the long-term technical quality of our systems;

• As a Senior Engineer, you will leverage your experience to guide the team in making informed technical decisions, such as continuous improvement of best practices (test culture, code reviews, monitoring and scalability of our tools). 

   

What you need to succeed:

• Exposure to architectural patterns of a large, high-scale web application (e.g., well-designed APIs, high-volume data pipelines, efficient algorithms);
• Familiar and willing to support small JS/TS tasks when needed;
• Expertise in troubleshooting issues, identifying the root cause, mitigating it, and setting up safeguards to prevent future issues;
• High level of self-organization, ownership, and responsibility;
• A great collaborator with excellent verbal and written communication skills. Minimum B2 English level;

• Willingness to be on-call for your squad (1 week every 5 weeks).

   

Why you’ll love it at Preply: 

• An open, collaborative, dynamic, and diverse culture;
• A generous monthly allowance for lessons on Preply.com, Learning & Development budget, and time off for your self-development;
• A competitive financial package with equity, leave allowance, and health insurance;
• Access to free mental health support platforms;
• The opportunity to unlock the potential of learners and tutors through language learning and teaching in 175 countries (and counting!)

Our Principles

• Care to change the world - We are passionate about our work and care deeply about its impact to be life changing.
• We do it for learners - For both Preply and tutors, learners are why we do what we do. Every day we focus on empowering tutors to deliver an exceptional learning experience.
• Keep perfecting - To create an outstanding customer experience, we focus on simplicity, smoothness, and enjoyment, continually perfecting it as every detail matters.
• Now is the time - In a fast-paced world, it matters how quickly we act. Now is the time to make great things happen.
• Disciplined execution - What makes us disciplined is the excellence in our execution. We set clear goals, focus on what matters, and utilize our resources efficiently.
• Dive deep - We leverage business acumen and curiosity to investigate disparities between numbers and stories, unlocking meaningful insights to guide our decisions.
• Growth mindset - We proactively seek growth opportunities and believe today's best performance becomes tomorrow's starting point. We humbly embrace feedback and learn from setbacks.
• Raise the bar - We raise our performance standards continuously, alongside each new hire and promotion. We build diverse and high-performing teams that can make a real difference.
• Challenge, disagree and commit - We value open and candid communication, even when we don’t fully agree. We speak our minds, challenge when necessary, and fully commit to decisions once made.

• One Preply - We prioritize collaboration, inclusion, and the success of our team over personal ambitions. Together, we support and celebrate each other's progress.

   

Diversity, Equity, and Inclusion

Preply.com is committed to creating an inclusive environment where people of diverse backgrounds can thrive. We believe that the presence of different opinions and viewpoints is a key ingredient for our success as a multicultural Ed-Tech company. That means that Preply will consider all applications for employment without regard to race, color, religion, gender identity or expression, sexual orientation, national origin, disability, age or veteran status.

We power people’s progress.

At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled — and it’s creating real impact.

We’ve just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. Today, 100,000+ tutors teach 90+ languages to learners in 180 countries — and we’re only getting started. As a category-defining company, we’re shaping what the future of learning looks like at global scale.

Meet the team!

Join Preply’s Teams and help us power people’s progress through life-changing learning experiences. We’re on a mission to combine the magic of the best tutors with cutting-edge AI to create personalized journeys that keep learners motivated and inspired.

The Preply Engineering Team provides the tools to help unlock human potential through learning. We implement A/B tests to prove the value of our initiatives and improve our product based on data and students’ and tutors’ feedback. As part of our commitment to ensuring high-quality products, we prioritize monitoring and metrics analysis to identify areas for optimization and ensure our services are performing at their best.

As a Senior II Backend Engineer, you’ll set the technical direction, lead cross-functional projects, and build systems that power Preply’s global growth engine. Your work will shape how millions of learners connect with tutors worldwide, tackling challenges that are complex in scope and critical to our success.

We are tech-agnostic, meaning we are open to considering candidates with diverse technology backgrounds, such as Java/Spring, Node.js/Express.js, Ruby/Ruby on Rails, Scala/Play, PHP, or Golang.

While Python is our primary programming language, prior experience with it is not mandatory. What truly matters is your enthusiasm for learning Python and your ability to adapt quickly to using it for product development.

What you’ll be doing

• Own and drive technical vision across squads
• Develop and own backend features using Python/Django, supporting the creation of new backend services as well as design, create, and/or troubleshoot integrations with third-party vendors.
• Scope and lead cross-functional initiatives involving design, data, product, security, and other engineering teams.
• Design and implement scalable backend systems, data pipelines, and integrations with third-party platforms
• Mentor and coach junior and middle engineers across squads
• Improve performance, tracking, monitoring, and reliability of our systems with an eye on long-term scalability.
• Collaborate closely with PMs, EMs, designers, and analysts to make data-informed, user-centered decisions.

• Champion engineering best practices: test automation, documentation, observability, and quality-first culture.

   

What you need to succeed

• Exposure to architectural patterns of a large, high-scale web application (e.g., well-designed APIs, high-volume data pipelines, efficient algorithms);
• Proven experience leading complex, ambiguous, or greenfield projects end-to-end
• Strong communication and cross-functional collaboration skills (English level B2+)

• Willingness to be on-call for your squad (1 week every 5 weeks).

   

Nice to have

• Side projects or product ownership experience.
• Experience designing systems for marketing attribution, experimentation platforms, or recommendation engines.
• Familiarity with cloud platforms (AWS/GCP) and modern DevOps practices.
• Familiarity and willing to support small JS/TS tasks when needed.

Why you’ll love it at Preply

• An open, collaborative, dynamic, and diverse culture;
• A generous monthly allowance for lessons on Preply.com, Learning & Development budge,t and time off for your self-development;
• A competitive financial package with equity, leave allowance, and health insurance;
• Access to free mental health support platforms;

• The opportunity to unlock the potential of learners and tutors through language learning and teaching in 175 countries (and counting!)

   

Our Principles

• Care to change the world — We are passionate about our work and care deeply about its impact to be life changing.
• We do it for learners — For both Preply and tutors, learners are why we do what we do. Every day we focus on empowering tutors to deliver an exceptional learning experience.
• Keep perfecting — To create an outstanding customer experience, we focus on simplicity, smoothness, and enjoyment, continually perfecting it as every detail matters.
• Now is the time — In a fast-paced world, it matters how quickly we act. Now is the time to make great things happen.
• Disciplined execution — What makes us disciplined is the excellence in our execution. We set clear goals, focus on what matters, and utilize our resources efficiently.
• Dive deep — We leverage business acumen and curiosity to investigate disparities between numbers and stories, unlocking meaningful insights to guide our decisions.
• Growth mindset — We proactively seek growth opportunities and believe today’s best performance becomes tomorrow’s starting point. We humbly embrace feedback and learn from setbacks.
• Raise the bar — We raise our performance standards continuously, alongside each new hire and promotion. We build diverse and high-performing teams that can make a real difference.
• Challenge, disagree and commit — We value open and candid communication, even when we don’t fully agree. We speak our minds, challenge when necessary, and fully commit to decisions once made.

• One Preply — We prioritize collaboration, inclusion, and the success of our team over personal ambitions. Together, we support and celebrate each other’s progress.

   

Diversity, Equity, and Inclusion

Preply.com is committed to creating an inclusive environment where people of diverse backgrounds can thrive. We believe that the presence of different opinions and viewpoints is a key ingredient for our success as a multicultural Ed-Tech company. That means that Preply will consider all applications for employment without regard to race, color, religion, gender identity or expression, sexual orientation, national origin, disability, age or veteran status.

We're building a modern SaaS application and seeking a Middle Java Backend Engineer to join our growing team. You'll play a role in architecting and developing our API infrastructure, business functionality, debugging of the Java services and Database design

Required:

• 3+ years of commercial Java development experience
• Strong expertise in building and maintaining production-grade REST APIs
• Proficient with Spring Boot or equivalent frameworks (Google Guice, Vert.x)
• Solid SQL knowledge and relational database experience (MySQL, OracleDB or any other SQL DB)
• Comprehensive testing practices using JUnit and Mockito
• Deep understanding of API design principles, RESTful patterns, and best practices
• Ability to work independently and take ownership of features end-to-end

Strong Advantage:

• DevOps skills with practical experience in infrastructure deployment and automation
• Production experience with AWS services (ECS Fargate, ECR, CloudWatch, VPC, IAM)
• CI/CD pipeline implementation (GitHub Actions, Jenkins, GitLab CI)
• Infrastructure as Code experience (Terraform, AWS CloudFormation, CDK)
• Docker containerization and orchestration
• Elasticsearch for search and analytics
• Experience with distributed systems and async processing

What You'll Do:

• Architect and develop scalable, maintainable REST APIs
• Build robust backend services for our SaaS platform
• Design database schemas and optimize query performance
• Write comprehensive unit, integration, and API tests
• Participate in infrastructure planning, setup, and deployment
• Contribute to architectural decisions and technical roadmap
• Possibly mentor junior developers and conduct code reviews
• Ensure code quality, security, and performance standards

Nice to Have:

• Microservices architecture and domain-driven design experience
• AWS DocumentDB or MongoDB Atlas in production environments
• Message queuing systems (RabbitMQ, AWS SQS, Kafka)
• Monitoring and observability tools (Prometheus, Grafana, ELK stack)
• API security best practices (OAuth2, JWT, API Gateway)
• Performance optimization and profiling experience

What We Offer:

The opportunity to work on a product from the ground up, influence architectural decisions, and grow with the platform as it scales.

US Company is searching for a Senior Java Developer with strong experience in developing and maintaining enterprise microservices-based platforms. Interesting long-term project (3+ years), distributed team, full-time, official contract. Remote work, European business hours.
 

Brief project description:
The platform is a set of microservices deployed on cloud infrastructure and partially - legacy code, supporting core business processes in delivery service across Europe. The role focuses on performance, security, maintainability, and implementing new features in a high-availability production environment.

Main Requirements:

• Strong experience in building scalable microservices: 8+ years
• Solid understanding of event-driven systems and API design
• Experience with CI/CD pipelines and automated testing
• Knowledge of cloud deployment (AWS, Azure, OpenShift)
• Ownership of assigned modules and code quality

Tech Skills:

• Microservices architecture, REST APIs, message brokers
• Refactoring, performance tuning, troubleshooting production issues
• Writing unit, integration, and end-to-end tests
• Security best practices for backend services

Programming Languages & Frameworks:

• Java 8–21: 10+ years
• Spring Boot / Quarkus: 10+ years
• SQL (PostgreSQL), NoSQL (MongoDB, Cassandra): 8+ years
• RabbitMQ, Kafka: 7+ years

Work conditions:

• Distributed team, remote work
• Scrum approach, 5–6 team members / team
• Full-time (40 hours per week), European business hours
• Official contract: salary, sick-leave days, holidays, vacations

Hiring process:

• Preliminary interview – 25-30 mins
• Internal tech interview (backend, Java, cloud) – 1 hour
• Interview with team and Tech Lead – 1 hour

Dear candidates, please note that we are looking for a developer in Vinnytsia.

Who are we?

Skai helps thousands of the most successful brands in the world reach customers and grow their brands on digital channels. The company offers best-of-breed advertising technology on the most impactful, highest-ROI media channels as well as a suite of data-driven insights, planning and measurement solutions to complement and maximize return from our solutions.
We’re 700 employees strong and growing every day! ~$7 billion in ad spend being managed on the SkaiTM platform every year, driving hundreds of billions in commerce decisions and sales transactions.
Established in 2006, we are a thriving organization, with a unique, vibrant startup culture with an incredible track record of success and an amazing future in sight!

Technical Skills:

Hands-on experience (5+ years) with Java object-oriented design and implementation;

Spring ecosystem: Spring Boot, Spring Web, Spring Security, Spring Data, Spring Scheduler;

Knowledge of web environments, REST API’s, Web services, Unit Testing, Java Build Tools;

Experience in usage of data storage: Redis, MySQL;

Experience in using message brokers: Kafka, RabbitMQ;

Knowledge of basic AWS stuff: EC2, RDS, S3, Load Balancer;

High-load / scalable systems design, performance tuning;

Testing: unit, integration, contract testing, test automation;

Security: authentication/authorization, OAuth2/JWT, secure coding practices;

Experience with Git.

Architectural Skills:

System architecture design: defining components, boundaries, integration patterns, and deployment topologies;

Microservices design: API contracts, data ownership, and inter-service communication patterns;

Scalability & performance: capacity planning, load testing, caching strategies, and performance tuning;

Reliability & resilience: circuit breakers, retries, bulkheads, graceful degradation, and failover strategies

Observability & operability: logging, metrics, distributed tracing, alerting;

Leadership Skills:

Code quality & standards: enforce best practices, testing strategies, and maintainable code guidelines;

Project & delivery leadership: estimation, risk identification, prioritization, and driving timely delivery;

Communication: clear, concise technical communication to engineers and non-technical stakeholders;

Delegation & empowerment: assign ownership, trust engineers, and unblock teams rather than micromanage;

Conflict resolution & influence: navigate trade-offs, resolve disagreements, and build consensus;

Strategic thinking: roadmap contribution, technical vision, and aligning engineering work with business goals;

Continuous improvement: retrospectives, process optimization, and fostering a culture of learning.

Binariks is looking for a highly motivated Senior Backend Software Engineer (Java & EPIC integration), who will implement the integration for our client.
The project is from the UK. The AI company specializing in clinical decision support technologies. Their platform integrates conventional clinical knowledge, such as guidelines, quality measures, and clinical trial criteria, into a digital format. This enables better patient care options and more cost-effective treatment options for healthcare institutions by using individual patient data and preferences.

What We’re Looking For:
 

• 5+ years of experience with Java, Spring Boot
• Experience in building integration APIs. REST API, OAuth, JWT, webhooks
• AWS cloud services skills (related to API management, messaging, and queues)
• Experience with EPIC EHR APIs
• Experience with EHR, HAPI (FHIR & HL7 v2)
• Experience with FHIR API, CDS Hooks
• Effective verbal and written communication skills with both management and peers

• Upper-Intermediate English for daily communication

   

Your Responsibilities:
 

• Building integration APIs
• Deploying and managing application within AWS infrastructure
• Collaborating with the development team and project stakeholders
• Maintaining high code quality and thorough documentation

N-iX is looking for an experienced Senior Java Engineer who goes beyond standard CRUD APIs and lives in the world of information retrieval.

Our customer is a Fortune 500 company. As a leading business-to-business organization, more than 3.2 million customers rely on its products in categories such as safety, material handling, and metalworking, along with services like inventory management and technical support. ​

In this role, you will act as the bridge between our core Java application architecture and our specialized search infrastructure. You will be responsible for the entire search lifecycle: from designing how data is ingested and indexed, to building the Java APIs that query that data, and crucially, tuning the relevancy algorithms that ensure our users find exactly what they are looking for, instantly. The ideal candidate has deep roots in the Apache Solr ecosystem but is also ready to embrace modern cloud-native search via AWS OpenSearch. Whether you are maintaining critical legacy Solr clusters or architecting new solutions on AWS, your goal is to make data findable, fast, and relevant.

Technology stack: Java/Spring Boot, Apache Solr (Legacy/Core), AWS OpenSearch (Modern/Growth), SQL DB, Kafka 

Responsibilities:

• Design, develop, and maintain high-performance backend Java services (primarily Spring Boot) that integrate with search engines.
• Build complex search features for the frontend, including faceted navigation (filtering), multi-tenant searching, real-time autocomplete/typeahead, and spell-checking suggestions.
• Utilize Java client libraries (such as Solr or AWS SDKs) to construct efficient, programmatic queries.
• Take ownership of the search schema design, deciding how complex data structures should be analyzed, tokenized, and stored for optimal retrieval.
• Build robust ETL pipelines in Java (potentially using Kafka or other messaging systems) to synchronize data from primary SQL databases into the search indices in near real-time.
• Configure analyzers, stemmers, and tokenizers to handle nuances in human language.
• Diagnose slow queries, analyze search logs, and optimize both Java application code and search engine configurations for low-latency performance.
• Maintain and optimize existing on-premise or cloud-hosted Apache Solr installations.
• Play a key role in designing hybrid strategies or migration paths from legacy Solr systems to managed AWS OpenSearch environments.

Requirements: 

• 5+ years of professional experience in backend software development using modern Java (Java 8+, Spring Boot ecosystem).
• Strong, demonstrable experience with Search Technologies. This means either:
  • Hands-on production experience configuring, managing, and developing against Apache Solr (understanding schema.xml, solrconfig.xml, Zookeeper integration).
  • OR deep foundational knowledge of Lucene-based search concepts (inverted indices, analysis chains, TF-IDF/BM25 scoring logic) with the ability to quickly apply that to Solr.
• Hands-on experience with AWS OpenSearch (or Elasticsearch) in a managed cloud environment.
• Experience with data modeling in relational databases (PostgreSQL, MySQL, Oracle).
• Strong understanding of RESTful API design principles.
• Preferred Qualifications:
  • Experience architecting zero-downtime migrations from self-hosted Solr to managed cloud search services.
  • Experience with event-driven architecture and streaming tools like Apache Kafka for real-time indexing.
  • Familiarity with containerization (Docker, Kubernetes) and CI/CD pipelines like Jenkins or GitLab CI.

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 looking for a highly skilled Senior Java Engineer with additional experience in Python to join our team. The primary focus will be on building and maintaining high-performance, scalable, and secure applications using Java, while leveraging Python for automation, scripting, data processing, or integration tasks. This role is ideal for an engineer who is strong in Java development but comfortable applying Python as a supporting language where needed.

Responsibilities

• Design, develop, test, and maintain applications and services using Java as the primary technology stack.
• Write clean, efficient, and maintainable code following best practices and coding standards.
• Use Python for automation, data manipulation, system integration, and auxiliary services.
• Optimize applications for performance, scalability, and security.
• Troubleshoot, debug, and resolve technical issues.
• Communicate with internal product owners and stakeholders
• Document technical solutions and maintain up-to-date system knowledge.

Requirements

• 4+ years of professional software development experience with Java (Spring, Spring Boot, Hibernate).
• Experience with Python (scripting, automation, or backend services).
• Experience with RESTful APIs design and integration.
• Experience with relational database systems (preferably MySQL).
• Experience with cloud platforms (preferably GCP)
• Strong understanding of Agile methodologies, especially of the Scrum framework
• Strong problem-solving and analytical skills.
• Upper-Intermediate English or higher (both written and spoken).

Nice to Have

• Knowledge of messaging systems (RabbitMQ, etc.).
• Knowledge on DevOps process (CI/CD stages, gitflow, DevOps as shared responsibility)
• Experience with AI tools (e.g., Claude Code, etc.)
• Experience with infrastructure implementation (Kubernetes, Docker)
• HIPAA Awareness

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

N-iX is looking for a highly skilled Middle Java Engineer with additional experience in Python to join our team. The primary focus will be on building and maintaining high-performance, scalable, and secure applications using Java, while leveraging Python for automation, scripting, data processing, or integration tasks. This role is ideal for an engineer who is strong in Java development but comfortable applying Python as a supporting language where needed.

Responsibilities

• Design, develop, test, and maintain applications and services using Java as the primary technology stack.
• Write clean, efficient, and maintainable code following best practices and coding standards.
• Use Python for automation, data manipulation, system integration, and auxiliary services.
• Optimize applications for performance, scalability, and security.
• Troubleshoot, debug, and resolve technical issues.
• Communicate with internal product owners and stakeholders
• Document technical solutions and maintain up-to-date system knowledge.

Requirements

• 3+ years of professional software development experience with Java (Spring, Spring Boot, Hibernate).
• Experience with Python (scripting, automation, or backend services).
• Experience with RESTful APIs design and integration.
• Experience with relational database systems (preferably MySQL).
• Experience with cloud platforms (preferably GCP)
• Strong understanding of Agile methodologies, especially of Scrum framework
• Strong problem-solving and analytical skills.
• Upper-Intermediate English or higher (both written and spoken).

Nice to Have

• Knowledge of messaging systems (RabbitMQ, etc.).
• Knowledge on DevOps process (CI/CD stages, gitflow, devops as shared responsibility
• Experience with AI tools (e.g. Claude Code etc.)
• Experience with infrastructure implementation (Kubernetes, Docker)
• HIPAA Awareness

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