Top 13 Java Development Companies In The UK (2025)

Searching for a reliable Java development company can feel overwhelming.

A quick Google search gives you millions of results — but how do you know which ones can truly deliver?

We know the challenge. Too many companies make big promises but fail to provide real, measurable results. That’s why we’ve done the hard work for you and compiled a guide to finding the best Java development services — so you can focus on choosing the partner that fits your needs without the stress.

No matter your industry — from fintech to e-commerce to enterprise solutions — you’ll find the right expertise here.

Ready? Let’s dive in.

What makes a top Java Development Company?

Here are the exact criteria you should look for when evaluating a Java development partner. Think of this as your checklist before signing any contract.

Proven Case Studies

There’s no better indicator of quality than seeing what they’ve delivered for other clients. Pay special attention to case studies in your industry — they’ll give you a realistic view of what the company could achieve for you.

Technical Expertise

Your partner should have in-depth knowledge of Java frameworks, libraries, and tools — from Spring Boot and Hibernate to Microservices architecture and RESTful APIs. Certifications, technical blogs, and past projects are great ways to verify this.

Industry Specialists

Domain knowledge matters. A company that’s already worked with businesses in your sector will understand your challenges and know how to build tailored solutions that align with your goals.

Strong Communication

Clear and consistent communication is essential. From the initial proposal to sprint reviews and project updates, you should always know where things stand and what’s next.

Top Java Development Companies

1. Goodcore

GoodCore Software has over 19 years of experience delivering custom Java applications for clients across a wide range of industries. Their team offers tailored services such as project-based development and dedicated Java engineers, ensuring scalable and reliable solutions.

Using a hybrid onshore-offshore model, GoodCore provides flexible access to skilled Java developers. Their expertise covers the full development cycle, from requirements analysis and architecture to coding, testing, and long-term maintenance.

2. Aero Business Solutions

Aero Business Solutions positions itself in the UK market as a provider of high‑calibre Java development services, specializing in building secure, scalable, and high‑performance Java applications. Their team offers customized software development across enterprise systems, web platforms, mobile app backends, and API integrations — all leveraging current Java frameworks and tools to deliver solutions tailored to each industry.

Their process emphasises clean architecture, stringent quality control, and full lifecycle support—from requirements analysis and application design to coding, testing, seamless deployment, and ongoing maintenance. Aero promotes competitive, transparent pricing and a commitment to delivering projects on time without compromising reliability or future scalability.

3. Andersen

Andersen employs a sizable, certified team of Java specialists ready to handle projects of various complexity. Their Java engineers are experienced in modern Java versions and frameworks, capable of building enterprise-grade back-end systems, API integrations, and scalable web applications.

The company provides full lifecycle Java development—from architecture and design through implementation, testing, deployment, and ongoing support. With a global footprint that includes a UK presence, Andersen delivers Java development through staff augmentation or dedicated team models tailored to client needs.

4. Amdaris

Amdaris (an Insight Company) provides deep capabilities in Java and Kotlin development. Their Java specialists are versed in modern frameworks like Spring Boot, Spring MVC, JPA, Hibernate, and modern API styles including REST, SOAP, and GraphQL. They also follow best practices in OOP, TDD, and BDD, and support SQL and NoSQL databases with clean architecture principles.

In a recent case study, Amdaris modernized a legacy platform for a FTSE250 oil & gas client by re‐architecting it as a robust, scalable Java-based application. The project employed technologies such as Hibernate, JSP, Spring, Oracle WebLogic, Struts2, Ant, and Oracle SQL to deliver a cloud‑ready, enterprise-grade solution. Let me know if you’d like more detail on their team structure, certifications, or agile delivery model.

5. 6B

At 6B, we excel in Java development as a core pillar of our bespoke software services. We deliver enterprise-grade Java applications—whether building new backend systems or modernising legacy platforms—with a focus on scalability, performance, and security. Our Java team brings deep technical skill across frameworks and architectural patterns to create robust, cleanly structured solutions. We handle every phase of Java development: from exploration and architecture to coding, testing, deployment, and long‑term support—always rooted in agile, user-driven delivery.

Our approach is purpose-built for real-world impact. Whether embedded in discovery and research or under Technology Delivery and Support & Maintenance services, our Java engineers are embedded in multidisciplinary teams that understand context, constraints, and compliance demands. We partner closely with clients—across public sector, fintech, logistics, healthcare—to ensure each Java solution is practical, secure, and engineered to evolve with your business.

If you’re looking for a Java development company that delivers results—at scale and with technical excellence – click the button below to get in touch. Or, if you’d like to learn more about our Java development services, then check out our service page here.

Get in touch with our Java Development team

6. WeDoWebApps

WeDoWebApps is a seasoned Java application development company in the UK, specialising in custom enterprise-grade Java application delivery. Their certified Java developers work with modern stacks—including Spring, Java EE, Microservices, Kafka, Hibernate, and JUnit—and support tool environments like Maven, Eclipse, and NetBeans. They build scalable, secure, feature-rich web and desktop applications tailored to diverse business needs.

Their offerings encompass full‑lifecycle Java services—custom development, legacy application modernisation, cloud-native Java microservices, enterprise apps, API integration, and long‑term maintenance and support. WeDoWebApps emphasises clean architecture, cost-effective delivery, and robust scalability, with an on-shore presence in the UK backed by offshore resource flexibility.

7. instinctools

Instinctools brings over 25 years of expertise in delivering enterprise-grade Java solutions across industries such as fintech, healthcare, and ecommerce. Their Java teams specialize in modernizing legacy systems, building cloud-native microservices, and creating scalable backend frameworks with a focus on clean architecture and high performance.

Their services cover the full Java development lifecycle, from architecture and coding to testing, deployment, and long-term support. With flexible engagement models and agile delivery, Instinctools ensures fast team scaling, seamless integration, and reliable, future-ready software solutions.

8. Pulsion

Pulsion is a UK-based full‑stack development company with a strong track record in delivering custom software solutions. Within their full‑stack expertise, they leverage Java to build robust backend systems that power enterprise‑level applications. Their team uses Java to ensure scalability, reliability, and performance in mission‑critical software, making it a valuable part of their technology stack.

With nearly three decades of experience and partnerships with leading cloud providers, Pulsion integrates Java development into high‑performance APIs, integration platforms, and enterprise services. Their approach combines deep technical expertise with agile delivery models, enabling clients to benefit from secure and efficient Java‑based solutions tailored to complex business needs.

9. UNL Solutions

UNL Solutions provides bespoke Java-based software engineering services aimed at enterprise-grade backend systems, cloud-native applications, IoT solutions, and machine learning integration. Their Java-centric offerings include performance-focused backend development, scalable architectures for large systems, and Java-powered solutions connecting physical devices to remote platforms via IoT extensions. The firm positions Java at the heart of its technical offerings, harnessing its maturity for robust, high‑throughput enterprise services.

Case studies reflect real-world Java expertise: UNL has staffed projects with dedicated Java developer teams to upgrade educational platforms and build payment processing systems for banking clients. Across their portfolio, Java underpins custom backend systems within sectors like fintech, education, and e‑commerce. This reinforces UNL’s ability to deliver scalable, secure, and tailored solutions that leverage Java’s ecosystem and runtime strengths.

10. Slashdev.io

Slashdev connects UK organisations with elite Java engineers through a rigorous remote-hiring process. Their developers are among the top 1% globally, having passed stringent vetting from thousands of applicants. You can begin without upfront fees, test the match risk-free for a week, and if the fit is agreeable, engage the developer for long-term collaboration.

Slashdev’s Java team is well-versed in modern backend architectures using Java frameworks—often aligned with Spring MVC and microservices standards—enabling scalable enterprise-level systems. Their flexibility allows rapid matching to client needs, delivering high-performing Java-based services for cloud-native applications, API layers, and high-throughput backend platforms.

11. Chetu

Chetu offers comprehensive Java application development services tailored to enterprise and cloud-based environments. Their skilled Java team delivers everything from large-scale Java EE systems—using frameworks like Struts, Spring, Hibernate, JSF, and Servlets—to modernizing legacy code, migrating platforms, optimizing performance, and implementing Java-based mobile and embedded apps.

On the web development front, Chetu builds dynamic, high‑performance Java web applications using servlets, JSP, JavaServer Faces, and API frameworks such as Restlet and Jersey. They engineer RESTful and SOAP-based web services, support microservices via Spring Boot and Spring Cloud, and integrate automated testing tools like JUnit and REST‑Assured to ensure reliable, scalable solutions across industries.

12. Appoly

Appoly is a UK-based Android development squad specialising in developing native Android applications using Java (alongside Kotlin), delivering high-performance, secure, and scalable mobile solutions optimised for a wide range of Android devices. Their developers leverage Java’s maturity and extensive ecosystem to build full-featured apps with capabilities like real‑time communication, machine learning features, and seamless cloud integration.

With a foundation in mobile-first engineering, Appoly embeds Java into the core of their development process, ensuring efficient backend logic, clean architecture, and cross-device consistency. Their Java expertise supports not only app delivery but also integration with AWS-based services and emerging technologies—making them a go‑to choice for enterprises needing robust Java-powered Android experiences.

13. JustCoded

JustCoded focuses on building digital platforms for industries such as fintech, crowdfunding, and real estate, but they do not highlight Java as a core part of their technology stack. Their services lean heavily on other frameworks and languages, meaning Java development is not positioned as a key area of expertise within their offerings.

For businesses specifically seeking Java-based solutions, JustCoded may not be the ideal fit, as their publicly shared capabilities do not showcase experience with Java frameworks like Spring Boot or Java EE. Instead, their strengths lie in other modern web technologies tailored to high-performance, industry-specific platforms.

Why Hire One of the Best Java Development Companies?

Simply put: your business deserves the best.

With the right Java team, you’ll get:

• Scalable, high-performance applications built to last
• Optimised architecture and clean code that reduces long-term costs
• Secure, reliable systems that protect your data and reputation
• Faster time to market with agile development practices

Choosing an experienced Java development company ensures your project is in capable hands, so you can focus on growth while they handle the technical heavy lifting.

At 6B, we’ve delivered enterprise-grade Java solutions for businesses across industries, consistently driving results that exceed expectations. If you’re looking for a trusted Java development partner to bring your vision to life, get in touch today — and let’s build something extraordinary together.

Find more Software Development and Java Development Companies in the UK and Rest of World