Top Java Development Companies In Ukraine For 2026
David Roberts
Founder and CEO - ReVerb
10.24.2026
If you are shortlisting a Java development company, Ukraine deserves a close look. Java has been one of the main backend languages in the Ukrainian outsourcing market for two decades, and many local firms started out building Java EE systems for banks, telecom operators and enterprise software vendors. Today the same firms work with Spring Boot, microservices, Kafka and cloud platforms, and several of them also take on the less glamorous work of keeping old Java estates alive and moving them onto supported versions.
This guide covers Java development companies in Ukraine that show Java as a named, featured capability on their own websites, either through a dedicated Java service page or through Java-tagged case studies. We checked each firm’s Ukrainian presence on its own site and left out anything we could not confirm there. You will find telecom billing specialists, Java modernization teams, staff augmentation providers and product studios, spread across Kyiv, Kharkiv, Lviv and Cherkasy.
Staged modernization of legacy Java and Oracle systems
Devico
Lviv
3,000+ (company-wide)
Java staff augmentation and dedicated teams
Software Planet Group
Cherkasy
100+ (Cherkasy centre)
UK-managed Java delivery with a Ukrainian centre
Proffiz
Lviv
n/a
Small to mid-size Spring and Micronaut projects
Brights
Kyiv
n/a
Java web, mobile and IoT products
OSDB
Kharkiv
n/a
Java portals and platforms for smaller businesses
Best Java Development Companies In Ukraine In 2026
1. SYTOSS — Java Specialist For Telecom Billing And Enterprise Systems
SYTOSS is based in Kharkiv and is one of the clearest Java specialists in the Ukrainian market. Its own site lists a company size of 150+ people, of whom more than 60 are Java developers with between 3 and 19 years of Java experience. The firm reports 16 years in business, says around 70% of its work is enterprise projects and that telecom accounts for 42% of its clients (all self-reported figures).
The telecom focus shows in the detail of its case studies. SYTOSS describes replacing legacy billing software for a telecom operator in Austria, customizing Ericsson BSCS for a European operator, and building a rating module that handles 8 million fixed-net subscribers and processes 80 million daily call records within a 10-hour window. Functional areas on its Java pages include billing, ordering, rating, invoicing, CRM and document management. Beyond telecom, it lists healthcare systems integration in Germany, an e-commerce CRM with Salesforce integration in the USA, fintech product work in Israel and ML image recognition in Sweden.
Engagement options cover Java outsourcing, dedicated teams and enterprise application development with a support and maintenance SLA. SYTOSS also reports that about 90% of its customers come back for further work.
Best for: telecom operators and enterprise software vendors with high-volume Java backends.
2. Redwerk — Kyiv Java House With Two Decades Of Platform Work
Redwerk lists its Ukrainian office at Ivana Franka Street in Kyiv, alongside an office in Tallinn, Estonia. Java sits at the core of the company’s history: its Java page says the first project Redwerk ever delivered was in Java, that it has been building Java applications since 2005, and that roughly 45% of its overall projects are in Java. The firm also reports 264 patches and other contributions to the Java open-source community, which is an unusual detail for a services company.
The stack on that page is broad and leans toward mature enterprise tooling: Spring, Hibernate, Struts, Tomcat, JBoss, GlassFish, EJB, JSP, JSF, Swing, GWT, iBATIS, JasperReports, jBPM and Solr, plus Android. Service lines cover Java SaaS and PaaS products, web and desktop applications, mobile apps and server-side development.
Projects featured on the Java page include an upgrade of an e-voting platform for the European Parliament completed in under a month, the conversion of a legacy Windows application into a workflow automation SaaS for a US company, and functionality extensions for a Dutch ERP vendor. That mix suggests a team that is comfortable inheriting code written by someone else and improving it without a full rewrite.
Best for: software vendors with established Java products that need ongoing development, upgrades and extensions.
3. Implemica — Staged Java And Oracle Modernization From Kharkiv
Implemica lists an office on Pavlivskyi Square in Kharkiv, plus an office in Warsaw. Java Modernization appears in its main navigation as a named service, framed around a simple idea: upgrade Java estates in stages rather than rewriting the business logic from scratch.
The scope is specific. Implemica works on Java and Spring applications, EJB-based services and application servers, including IBM WebSphere and Oracle WebLogic deployments. Frameworks named on the page include Spring, Spring Boot, EJB, JSP, JSF, RichFaces and Struts. It also covers the Oracle side of many legacy Java systems: Oracle Database, E-Business Suite, SOA Suite, Forms and Reports, JDBC code, stored procedures and PL/SQL. Where cost is the driver, the firm describes staged moves from Oracle Database to PostgreSQL or MySQL.
Its process runs in five steps: assess, map the estate, add protection through tests and monitoring, migrate in stages, then retire the legacy path. Deliverables listed include a modernization roadmap, a dependency and risk report, target architecture notes, a phased implementation plan, upgraded components and updated documentation. Implemica cites more than 12 years of work on mission-critical automation.
Best for: companies running old Java EE or Oracle-heavy systems that cannot afford a big-bang rewrite.
4. Devico — Java Staff Augmentation And Dedicated Teams From Lviv
Devico gives its Ukrainian office address in Lviv and also lists engineering locations in Kharkiv and Kyiv. Its dedicated Java hiring page states that more than 100 Java developers are available, out of a company-wide pool of 3,000+ engineers across 14 locations. The firm reports more than 16 years in business, an average developer experience of 8+ years and a turnover rate of 4.4% (self-reported).
The Java stack is described in detail: Java, Spring, Spring Boot and Hibernate at the core, Spring MVC, JAX-RS and Apache Camel for web and integration work, Spring Security, OAuth and JWT for security, and Kafka, RabbitMQ and ActiveMQ for messaging. Build and test tooling includes Maven, Gradle, JUnit, TestNG and Mockito, with Docker, Kubernetes and the three major clouds on the DevOps side.
Devico offers two models: staff augmentation, where Java developers join your in-house team, and dedicated teams that work only on your project over the long term. The hiring process is laid out plainly. You submit a request, have a 30-minute scoping call, receive matched candidates within one to two days and interview two or three of them before onboarding. The firm reports an average project lifetime of three to seven years.
Best for: engineering leaders who want to add Java capacity to an existing team quickly.
Software Planet Group is headquartered in Guildford, UK, and runs its engineering through Ukrainian development centres. The company’s own site describes its centre in Cherkasy, which began as InterLink, as employing more than 100 professionals across two locations, with one office focused on enterprise development and the other on smaller companies and startups. Each location has design, QA, support, HR and project management staff.
Java and Scala sit under the firm’s core technologies with a dedicated Java page, which reports more than 50 Java developers. The framework list is wide: Spring, Hibernate, Struts, JSF, Grails, Vaadin, Micronaut, Play, Dropwizard and Quarkus, with Lombok, Thymeleaf, Quartz and Jackson among the libraries. Testing tools named include JUnit, Mockito, TestNG, Cucumber, JMeter, Testcontainers and Rest Assured, which points to a team that takes automated testing seriously.
Services cover bespoke Java development, Java consulting, legacy codebase modernisation, desktop applications, cloud migration, architecture design and CTO or tech lead support. The company says it has used Scrum since 2004. For buyers in the UK, the combination of a local contracting entity and a Ukrainian delivery centre can simplify procurement.
Best for: UK businesses that want a UK contract and account management with Java delivery in Ukraine.
6. Proffiz — Lviv Team For Spring, Micronaut And Microservices
Proffiz is headquartered on Uhorska Street in Lviv and runs a second software development centre in Krakow, Poland. Java has its own page under the company’s Expertise menu, and its portfolio includes a packaging management platform tagged as a Java project.
The Java page names a modern, lightweight set of tools. Spring and Spring Boot cover larger enterprise applications, while Micronaut is offered for modular microservices and serverless apps where startup time and memory use matter. Spark appears for REST APIs and smaller services, and Google Web Toolkit for teams that want to write browser UI code in Java. Services span custom web and mobile Java applications, web services, cloud solutions and AI/ML work, with Big Data, cloud computing and IoT as focus areas.
Proffiz is open about its project range. The site lists budgets from under $10,000 to over $200,000 and team sizes from one or two people up to ten or more, with up to eight working hours of overlap with Europe and up to four with the US. Industries named include fintech, manufacturing, photo and imaging, and printing. The page also references the local Java community, including Java User Group Ukraine and Java Day Lviv.
Best for: startups and mid-size companies with defined Java scopes and European working hours.
7. Brights — Kyiv Studio For Java Web, Mobile And IoT Products
Brights lists its main office on Simyi Prakhovykh Street in Kyiv, with further offices in Warsaw and New York. The company has a dedicated Java technology page where it describes itself as a Java development company from Ukraine, and it reports shipping more than 300 products since 2011 for clients in over 30 countries.
The Java services on that page are product-oriented: Java web and mobile applications, custom business systems such as CMS, CRM and ERP, database-driven software, web apps and APIs, IoT solutions and migration of existing systems to Java or J2EE. The named stack is practical rather than exotic, with Spring for large applications, Hibernate for data access, RabbitMQ for asynchronous messaging and Kafka for streaming, metrics and log aggregation.
Brights also positions itself for early-stage work, with MVP development, DevOps, cloud migration, app modernization and data analytics among its wider services. Its quote form lists budgets from under $20,000 to over $200,000, which gives buyers a sense of the project sizes it takes on. For a company that wants one partner to handle a Java backend, a mobile front end and the infrastructure behind both, that breadth can reduce handoffs between vendors.
Best for: product companies that need a Java backend built together with mobile apps or IoT components.
8. OSDB — Kharkiv Team For Java Portals And Business Platforms
OSDB is based in Kharkiv, with its office on Chervonoshkilna Embankment. It is a smaller firm than most on this list and reports working with more than 50 businesses worldwide. Rather than a standalone Java service page, OSDB shows its Java work through its portfolio, where several projects are tagged with Java.
Those Java-tagged projects include a real estate portal, a health management platform, a music authorship portal, the Calxpress project and Workus, which is listed with Java 14. Taken together they point to a team that builds content-heavy portals and line-of-business platforms, the kind of web systems where a Java backend handles user accounts, records, workflows and integrations behind a web front end.
Because OSDB is compact, buyers can expect closer contact with the people doing the work and fewer layers of account management than at a large outsourcing firm. The trade-off is capacity: it is better suited to a focused product or portal than to a programme that needs dozens of Java engineers at once. Ask for details of the Java version, framework choices and hosting setup on the portfolio projects closest to your own, and for references from clients with a similar scope.
Best for: smaller businesses that need a Java-based portal or platform built by a hands-on team.
Engagement Models For Java Outsourcing In Ukraine
Most Java outsourcing in Ukraine runs on one of three models, and the firms above use all of them in different proportions.
Staff augmentation. Individual Java engineers join your team, work in your repositories and follow your processes. This suits companies with strong in-house technical leadership. Devico is built around this model, with dedicated teams as the step up.
Dedicated team. The vendor assembles a full team (developers, QA, often a project manager or tech lead) that works only on your product. You set priorities and the vendor handles hiring, retention and day-to-day management. Most firms in this guide offer it.
Project-based delivery. The vendor takes responsibility for a defined scope, often after a discovery phase, on fixed price or time and materials. Modernization specialists such as Implemica tend to structure work in phases, with a roadmap and risk report before migration starts.
Pricing varies with seniority, team composition and contract length, so treat any single hourly figure with caution. Some firms publish project bands on their own sites: Proffiz lists budgets from under $10,000 to over $200,000, and Brights from under $20,000 to over $200,000. For a long-running dedicated team, ask for a rate card by seniority level and a clear policy on replacements and notice periods. Our guide to dedicated development teams in Ukraine covers that model in more depth.
How To Choose A Java Development Company In Ukraine
Is Java A Core Practice Or Just A Line In The Tech Stack?
Almost every Ukrainian software firm lists Java somewhere. What you want is evidence that Java is a practice with its own people and history: a dedicated service page, named Java case studies, a count of Java engineers, or specifics such as the frameworks and application servers they support. SYTOSS and Redwerk, for example, publish the share of their work that is Java. Ask any vendor how many of their current engineers work primarily in Java and what share of revenue comes from Java projects.
Do They Match Your Java Era: Modern Spring Or Legacy Java EE?
Java projects split into two broad camps. New builds usually mean Spring Boot or Micronaut, containerized microservices, Kafka and a cloud provider. Existing systems often mean Java 8 or older, EJB, JSF or Struts, and WebSphere or WebLogic servers. A team that thrives on greenfield microservices may struggle with a 15-year-old monolith, and the reverse is also true. Ask for a case study in your era, and if you are modernizing, ask how they add test coverage before changing anything.
How Do They Plan For Business Continuity?
Ukrainian IT firms have spent several years adapting their operations, and most now run distributed setups as standard. Ask specific questions: which cities your team members work from, whether offices have backup power and multiple internet connections, whether engineers have generators or power banks and mobile data at home, and how work is reassigned if someone becomes unavailable. Many firms also operate legal entities or offices in the EU, as Implemica does in Warsaw and Proffiz in Krakow, which can make contracting and invoicing simpler. Agree on code ownership, repository access and documentation standards in the contract so your system never depends on one person.
Can They Show Domain Experience Close To Yours?
Java is widely used in telecom, banking, insurance, logistics and enterprise software, and each domain brings its own vocabulary and constraints. A vendor that has already built rating engines or billing integrations will ask better questions about a telecom project than a generalist. Look for case studies in your industry, and ask what regulatory or data protection requirements they have worked under before.
What Does The First Month Look Like?
The quality of onboarding often predicts the quality of the relationship. Ask how quickly candidates can be presented, whether you can interview them, how long a trial period lasts and what happens if a developer is not a fit. For project work, ask for the discovery deliverables you will receive before the main build starts. A clear, written first-month plan is a good sign.
Frequently Asked Questions
Why Hire Java Developers In Ukraine?
Ukraine has a large, experienced Java community built over decades of enterprise outsourcing, with developer events such as Java Day Lviv and local Java user groups. Working hours overlap well with Europe and partly with the US East Coast, and many firms combine Ukrainian delivery with EU or UK contracting entities. For buyers comparing regions, our Poland vs Ukraine vs Romania nearshore comparison sets out the trade-offs.
Can A Ukrainian Firm Take Over An Existing Java Codebase?
Yes, and several firms in this guide specialize in it. Implemica focuses on staged modernization of Java and Oracle systems, Redwerk features platform upgrades and legacy conversions on its Java page, and Software Planet Group lists legacy codebase modernisation as a Java service. Expect a short assessment phase first, covering code quality, dependencies, test coverage and deployment, before the vendor commits to estimates.
Do These Companies Work With Kotlin And Other JVM Languages?
Many do, though the depth varies. Software Planet Group groups Java with Scala in its core technologies, and Redwerk lists Android alongside its Java backend work. If Kotlin on the server is important to you, ask for a specific Kotlin backend project rather than assuming Java experience transfers automatically, since frameworks and idioms differ.
How Long Does It Take To Start A Java Team?
For staff augmentation, firms with a large Java bench can present candidates within days. Devico, for example, describes matching candidates within one to two days of a scoping call. A full dedicated team or a project with a discovery phase usually takes longer, often several weeks, depending on seniority and how specialized the stack is.
Conclusion
The Java firms in Ukraine covered here range from deep specialists, such as SYTOSS in telecom billing and Implemica in legacy modernization, to flexible staffing providers like Devico and product studios like Brights and Proffiz. The right choice depends less on size than on fit: the Java era you work in, the domain you operate in and the engagement model your team can manage.
Shortlist two or three firms whose case studies resemble your project, ask the continuity and onboarding questions above, and run a small paid pilot before committing to a long-term team. That approach will tell you more about a Java partner than any sales deck.
Bookmark this guide, as we update it when firms change their services or locations.
If you want to feature your company on this list, email us or submit a form in the Top Choices section. After a thorough assessment, we’ll decide whether it’s a valuable addition.
