Custom Java Development Services

We provide bespoke Java solutions to drive the growth and innovation of forward-thinking brands.

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We Work with Global Brands

BNP
TBLX
Santander
HRS
ING
Change Donations
Asseco
BitPanda
java developers Scalo

Custom Java Development Services That Make Your Business Run Smoother

Convert business complexity into a business edge with targeted Java engineering

Your business benefits from 100+ Java engineers who create solutions addressing specific operational challenges and setting up your technology for future opportunities. From decomposing monoliths into Spring Boot microservices to implementing event-driven architectures and building cloud-native applications, you receive systems designed for concrete business outcomes.

Here’s what that means in practice: payment processors reducing transaction times to milliseconds and cutting cart abandonment by 30%. Logistics platforms handling 10x traffic spikes without extra infrastructure. Insurance providers modernizing claims systems for real-time processing and reducing operational costs by 40%.

You benefit from deep expertise in enterprise technologies and custom Java development services – Spring ecosystem, Kafka for distributed streaming, Kubernetes orchestration, and cloud-native patterns using AWS, Azure, or GCP. Technology without context lacks impact. Results depend on understanding how Java solves your business problems. Need sub-second response times? Your systems use Redis caching and optimized Hibernate queries. Compliance requirements? You get event sourcing patterns. Planning for multi-region growth? Your architecture supports distributed transactions and data consistency.

Scalo in Numbers
92%

Long-term clients

100+

Java developers on board

18+

Years on market

150+

Java projects delivered

Scalo Is Your One-Stop Shop for Java Development

Looking for a single place to handle every part of your Java project? With Scalo, you get all the expertise and support you need – from the first idea to ongoing improvements – under one roof.

That means less hassle for you, faster results, and a partner who’s ready for whatever comes next.

consultations

Java Consulting

Get practical advice on building applications that fit your business goals. We help you make the most of Java’s strengths, so your solutions are stable and ready for growth. You’ll always know what to expect, with clear guidance every step of the way.
Java App Development

Java App Development

Create digital products that work smoothly, even when things get complicated behind the scenes. Java lets you build for web, desktop, wearables, or IoT - all with the same dependable foundation. Your users get a consistent experience, regardless of the platform.
cloud

Java Migration

Move your existing systems to Java without the headaches. We guide you through each step, making sure your data and processes stay safe. The result: a modern setup that’s easier to manage and ready for what’s next.
Java Mobile Migration
Java Mobile Migration
Upgrade your mobile apps to Java for better performance and easier updates. We handle the technical details, so your users notice only the improvements. Your app stays current and connects smoothly with today’s devices.
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Discover the Scalo advantage for your java development needs.

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Our Java Technology Stack

Scalo’s Java development teams specialize in creating custom software solutions utilizing a robust and reliable technology stack.

We leverage the Spring framework for comprehensive back-end development and Hibernate for efficient data layer management. For cloud solutions, we use AWS or VM-based hosting, providing scalable and secure options. While we do have a preferred set of tools, there isn’t a rigid technology stack we adhere to for Java development.

Our flexible approach lets us offer custom Java development services, ensuring the technologies we use align seamlessly with the unique requirements of each project.

Rafał Chwastek - Scalo
Rafał Chwastek, Solution Consultant and Software Architect at Scalo

Enterprise Java requires understanding beyond syntax—JVM tuning, garbage collection, threading, and patterns that scale.

Over 15 years and 100+ Java projects, we’ve built systems handling millions of daily transactions, optimized memory usage in terabyte-scale processing, and debugged concurrency issues that only surface under production load.

Our Spring and Jakarta EE mastery covers dependency injection, transaction management, and security—the core capabilities that keep enterprise applications reliable at runtime under real conditions.

 How We Deliver Our Services
scalo development process

 Benefits of Working with Scalo

As a leading Java development company, Scalo offers versatile Java development services tailored to scale your development teams up and down according to the needs of your IT projects.

Our flexible billing models and cost-effective outsourcing services prove particularly advantageous in periods of economic uncertainty.

Cost Efficiency
Cost Efficiency
Outsourcing Java projects with your trusted Java development partner tends to be more economical than maintaining a full-time in-house Java workforce.
Know-how
Know-how
With us, there's no need for you to invest in additional infrastructure, expertise, or equipment. Our custom Java development services come with all the necessary know-how included.
Agility
Agility
Engaging our Java software development services enhances your agility far more than hiring in-house staff would.
Expertise
Expertise
High code quality is maintained because the best Java programmers understand how to use various current Java-related tools and solutions.
Talent Pool
Talent Pool
We significantly reduce the time and effort required for business recruiting. As a software outsourcing development company, we supply a ready-to-work workforce, eliminating the need to build a team from scratch.
data analytics
Capacity
Our skilled Java developers will take charge of your project, allowing you to focus on your core business operations. Partnering with Scalo means choosing a reliable Java development partner committed to your success.
Cooperation Models
Java-Based Software Development
Java-Based Software Development
We craft scalable Java applications that solve your business tasks — robust, efficient, and future-proof.
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experience
Java Experts
Tap into top-tier Java talent without the overhead. Reliable delivery, seamless integration, zero compromises.
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Dedicated Java Team on Demand
Dedicated Java Team on Demand
Assemble a dedicated Java development team ready to jump in and accelerate your project — fast and focused.
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Why Companies Choose Java

Designing swift and scalable web apps requires the right development architecture and a proficient team.

Engaging Java software development services from an external Java development company, like ours, often proves to be the more cost-effective choice.

This avoids the unnecessary risks associated with investing in your in-house development team prior to having a proof of concept for your product.

Most companies seeking robustness, stability, and cost-effective development choose Java.

Maturity
Maturity
First introduced in 1995, Java stands the test of time as one of the most popular programming languages today. Java's longevity can be attributed to its stability, maturity, and broad range of features.
Object-Oriented Programming
Object-Oriented Programming
Being an object-oriented language, Java programs comprise interacting objects. Thanks to object-oriented programming, Java code is more straightforward to comprehend and maintain.
Simplicity
Simplicity
Java is considered a simple language to learn and maintain due to its few syntactic rules. As a statically typed language, Java also simplifies maintenance. Java programs maintain their type throughout execution, making Java code less error-prone.
Security
Security
Java ensures safety with its secure features, such as bytecode verification and sandboxing, making it a secure programming language.
Memory Allocation
Memory Allocation
Java capitalizes on automatic memory management, meaning applications do not need to manage memory manually. Java employs a garbage collector to reclaim unused memory, resulting in more stable and reliable applications.
Multithreading
Multithreading
Java supports multithreading, enabling applications to execute multiple tasks concurrently. Through maximizing CPU utilization, multithreading makes Java apps more efficient and responsive. This is another reason many companies work with a specialized Java development company for their software needs.

 Our Industry Expertise in Java Development

Clients from diverse industries choose Scalo for our Java software development services to create secure, scalable, and powerful Java-based applications.

Our strong expertise, dependable reviews, and top-tier talent pool set us apart as a leading Java development company, proficient in building applications for various sectors.

Our developers can augment existing teams, empowering your company to harness the full potential of Java.

Alternatively, we can establish dedicated teams focused on your objectives, offering custom Java development services tailored to your needs.

Fintech
Fintech
Java, one of the most widely utilized languages in the fintech industry, is an excellent tool for developing data simulations, modeling, and crafting swift and reliable mobile and web applications.Use cases: Expense management systems, banking software, money transfer systems, mobile wallets, payment processing development, and trading platforms.
Enterprise
Enterprise
We offer end-to-end Enterprise Software Development life cycle services. Boost your digital transformation, enhance effective asset management, and adopt data-driven decision-making with our custom software solutions for enterprises.Use cases: Artificial Intelligence and Machine Learning solutions, Business Intelligence, Enterprise-Class CRM, Document Management Systems, Enterprise Mobility and Security.
E-commerce
E-commerce
E-commerce technology enhances online business accessibility, efficiency, and significantly amplifies brand awareness. E-commerce solutions also help address the complexity of multi-channel sales by integrating processes and systems, resulting in an exceptional customer journey across all channels.Use cases: E-commerce CRM, cloud for e-commerce, e-commerce payments, cloud for e-commerce, chatbots & custom service for e-commerce, sales automation.
Media & Entertainment
Media & Entertainment
The media and entertainment sector, like manufacturing, is undergoing critical changes due to technological evolution. Customers' expectations are elevating. They foresee more personalized content, faster delivery, and lower costs, which can be realized through effective Java development projects.Use cases: Content management systems, streaming apps, digital asset management, digital marketing platforms, and customer relationship management.
Manufacturing
Manufacturing
The manufacturing industry is experiencing significant transformations due to technological advancements, and customer expectations are evolving rapidly. They now anticipate greater product customization, faster delivery, and lower production costs, all achievable through a robust Java development project.Use cases: Embedded systems, remote service apps, data collection software, ERP manufacturing software, manufacturing execution system (MES), and testing software.
Scalo Technologies Outsourcing

Why Choose Scalo for Java Development?

Looking for a Java development partner who actually gets what your business needs? At Scalo, you work with a team of over 600 specialists who’ve spent 15+ years solving real-world challenges for companies in banking, fintech, and beyond. Instead of just building software, we focus on helping you make the most of Java’s strengths, so your project is practical, reliable, and ready for what’s next.

You’ll notice the difference in how we work. Our clients – from fast-moving startups to established enterprises – count on us for clear communication, honest advice, and solutions that fit their goals (not just a one-size-fits-all approach). Think of us as the folks who ask the right questions, spot the roadblocks early, and keep your project moving forward—no surprises, just steady progress.

Choosing Scalo means you get a partner who’s invested in your success, from the first planning call to launch day and beyond. If you want a Java team that’s as committed to your results as you are, you’re in the right place.

What Our Clients Ask
What are your code quality and security assurance practices?

Our core quality practices include code reviews, linters, static analysis (with SonarQube), SAST/DAST/SCA (with Checkmarx/ZAP/SOOS/Dependabot), and adherence to ISO 25010, OWASP ASVS L2, and 12factor standards throughout development.

What does your QA process look like (shift-left, automation, coverage)?

We ensure code quality at every stage. Our testing processes involve unit, integration, and end-to-end tests. We also perform regression automation, non-functional testing for security, performance, and usability, as well as UAT on real data.

Which testing frameworks and tools do you use (E2E, API, UI, performance)?

Most frequently we use JUnit, SpringBoot Tests, Selenium, and Karma. We also review performance with JMeter/Gatling. Additional testing tools include ZAP (DAST), SonarQube/Checkmarx (SAST), and SOOS/Dependabot (SCA).

How do you approach architecture (modular, microservices, event-driven, multi-tenant)?

Usually, we build microservices on EKS/ECS and design event-driven, stateless by default architectures based on EventBridge/SQS. We also have experience with designing and building multi-tenant architectures with siloed data.

How do you handle documentation and handover (code, infrastructure, runbooks)?

For each project, we maintain in-depth ADR tracking, tech-debt logs, and full architecture documentation. All code is stored in client’s Git or other repository. We also deliver regular QA/PM reports and encourage ongoing knowledge transfer to avoid silos.

What are your CI/CD practices and release strategies?

We set up end-to-end CI/CD pipelines with automated tests and security gates. Typically, projects run in 2-3 week sprints with operational/steering governance to confirm direction and requirement fulfillment.

image_pol
Łukasz Pol
Head of Business Development
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