Java Engineering

We know Java inside out and understand how to treat Java enterprise system architecture, databases, and APIs. We always get the most out of Java features for the specific business domain and required business solutions.

To provide first-class development of FinTech and other B2B and enterprise solutions, we find, attract, teach, and nurture superb Java developers and only retain those who are willing to study and grow.

oracle java spring hibernate jboss apache spark hadoop postresql hazelcast mongodb couchbase cassandra mysql amazon heroku
Java Backend & Multi-Layering
Client Application Layer Client API Layer Third-Party Systems APIs Layer Service / Business Logic Layer Data Distribution Layer Data Transformation Layer Persistence Logic Layer Database Storage Layer java-layer

For enterprise systems, we offer complex multi-layered Java software development that includes backend, database, frontend, mobile software development, and third-party API integrations.

Secure, reliable, and scalable APIs built by our developers prevent data loss and reduce transmission latency, network traffic, and server load.

Being experts in Java backend development, we primarily use Spring, Hibernate, JBoss, Tomcat, Maven, Hadoop, Spark, Hazelcast, AWS, SQL and NoSQL databases, etc.

Reengineering & Microservices
SOACoarse unit
cheme step cheme step cheme step cheme step
MonolithicSingle unit MicroservicesFine-grained

Many of our customers come to us for our expertise in reengineering legacy enterprise software systems.
Depending on system prerequisites, we adopt one of the following approaches:

  • Creating a new software system from scratch using microservices.
  • Continuously decomposing the working system into microservices.

Before we start a project, we always conduct an audit of the current software system and development processes, which includes an analysis of our client’s business needs and goals, to offer the most efficient solution for each case.

Java Competency Center

We have created a Java Competency Center in which we aggregate practical information, such as technical descriptions of each project, new integrations, resolved problems, etc.

Any information that is not covered by an NDA is described, documented, and added to the knowledge base of our Java Competency Center. This is shared among our specialists, who can then discuss it and find new solutions, thereby generating synergies of knowledge across the entire company rather than keeping it within a single team.

Java Certificates
Java Certificates
We encourage our developers to earn Oracle Java Certificates of different levels. Thus, they further their own skills development and professional growth, which enables higher productivity and greater performance.
Java IT Academy
Java IT Academy
Every year, we hold classes at IT Academy, where attendees can gain practical knowledge of Java development and the FinTech domain. As a study outcome, each attendee implements a project supervised by a mentor.
Smart Club for Smart Talks
Smart Club for Smart Talks
We add value to the software community by organizing a monthly Smart Club for Smart Talks meetup. Our meetup is an opportunity for developers to foster their knowledge in using Java technologies and communicate with like-minded people.

Over 10,000 nonprofit professionals use Salsa's integrated software for donor management, marketing, fundraising, advocacy, and peer to peer to fuel great causes across the globe


Global payment system for Bitcoin and fiat currencies. Has 250,000 clients and processes more than 2,000 transactions a day.


Technology platform providing a customizable robo-advisor in the wealth-management industry. Raised US$20 million in series A financing.

Invest in Property Development

A lending platform where individuals can invest in property development projects in their local community and beyond.


Innovative and affordable solution for integration of two-factor authentication in banks and payment systems. A partner of Citrix Ready Marketplace.

Universal payments

Relied on by more than 1,000 of the largest financial institutions to execute US$14 trillion each day in payments and securities.


Their flagship software product serves Ford Motor Company with 16,000 users, General Motors with 13,000 users, plus Airbus, NAVISTAR, TRW, AAM, JCI, and other manufacturers.


Global payment gateway solutions connected to 350 card acquirers and alternative payment methods and working in 160 countries.


Market-leading software for wired and wireless broadband service providers that is currently running on tens of millions of devices.


Integrated cloud-based insurance platform for property and casualty carriers, agents, and MGAs . Raised US$36.7 million in funding.

Over-The-Counter Trading

High-performance system providing the full spectrum of integrated solutions for Fixed Income, Currencies and Commodities (FICC) Trading.

Pay on your terms

Online payment processing platform for merchants that simplifies the integration of different levels of payments in their business.


The world’s only provider of enterprise video solutions. Raised more than US$62 million in funding.

Digital, Meet Voice

Enterprise call marketing solutions with the Voice Marketing Cloud platform. Powers 100 million calls yearly. Raised US$60 million in funding.


Service for e-commerce merchants that simplifies the PCI DSS certification process. Serves MLB, Hughes, Vigorate, OrderDynamics, Six Flags, Deloitte, etc.

Lending Fintech startup, London, UK
Co-Founder & CEO
Their team is very efficient, every sprint that was planned, was completed on time – so it felt like fixed cost based contract although it wasn’t. They have really good resources – we had team of 6 (front-end developer, back-end developer, 2 QAs and Tech Architect and PM) – each and every one of them were skilled & senior. I personally had gone down to Kiev to meet Vasyl and the team and spent 2 days with them – Vasyl has formed very impressive management style where developer get to choose their own projects etc and very efficient I must say.
Alex Sukhenko, Salsa Labs,
Washington D.C., USA
Vice President, Technology
INSART has shown remarkable performance during the time we’ve been using their services. Although engaging them to support our current platform was not in our plans at the beginning, we have gradually come to regard them as our strategic partner whose involvement in our projects is mission-critical to their success. Not only have they been able to satisfy all our requirements, but they have also shown themselves as a collaborative, creative, and immensely talented team.
Boris Litvin, Ortess, Inc.,
New York, USA
CEO, President
I would like to thank INSART team members for their service, quality, and dependability. We have been working with the dedicated team for the past several years on a very complex financial project. The team demonstrated not only technical excellence, but superior communication skills, understanding of the business and focus on results. INSART team naturally blended with our internal team and ensured our long-term success.
Larry Woodard,
Dimark Software Inc.,
Cupertino, USA
Over the past several years we've had the pleasure to work with the folks at INSART on a large number of projects. We've always found them to be extremely competent, technically proficient and highly focused. We look forward to continuing to work with them over the coming years, and I offer my strongest recommendation for INSART.
Stephen Blankenship, Kontiki,
San Francisco, USA
VP Product
Our experience shows that INSART's developers are capable of implementing state of the art web based services. They are professional, responsive, and can quickly adapt to course changes.
Jeff Moffa,
Enterprise Software Vendor,
Detroit, USA
Vice President
INSART has proven to be a capable and valuable software development partner.
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