Backend development as a reliable foundation for your business
We provide backend development of any complexity. We set up request processing, business logic, database operations, integrations, and ensure the stable performance of applications and web platforms under high load. We take responsibility for designing and building the server side of applications and websites. The FreeBlock backend team designs the architecture, writes the code, configures APIs, and monitors how the system behaves under real-world, not laboratory, нагрузкой.
Our expertise
We provide backend development for web platforms, user dashboards, marketplaces, and internal systems where reliable server-side logic and proper data handling are essential. For platforms with user accounts, we design data models, implement registration and authorization mechanisms, create roles and access rights, and also configure order processing and notifications. We choose the tech stack based on the project’s goals. We use Java with Spring Boot or JavaScript with Node.js when flexibility and rapid integrations are required.
We take on orders for backend development of AI platforms. We design services that receive client requests, interact with an AI model or external API, process responses, and deliver results in a user-friendly format. We ensure that an AI-powered platform can handle peak loads, distribute requests correctly, and maintain task queues when computations are intensive. We integrate AI into backend functionality accurately and reliably.
FreeBlock is a backend developer for Web3 and blockchain projects, where the server side helps connect smart contracts, user wallets, and external services. In blockchain platforms, we implement network event indexers, services for aggregating transaction data, and APIs through which the frontend receives transaction history and current balances. We design backend architecture so that internal functionality correctly handles the specifics of different networks, accounts for delays, and works with multiple blockchains simultaneously.
We provide backend development for APIs used by other services, mobile applications, and external partners. We build REST API layers that handle thousands of requests per second, validate data, log actions, and return responses in a strict format. We use thoughtful architecture, caching, service separation, and message queues to keep the system stable under heavy load. As an experienced backend web developer, we ensure predictable service performance during peak traffic.
We provide backend development based on microservices architecture when a product requires flexibility, independent modules, and horizontal scalability. In systems that include billing, reporting, notifications, and analytics, we separate them into individual services, each with its own API and database. We simplify maintenance, build in the ability to develop modules independently, and reduce the impact of errors in one service on the entire system. As a Java backend developer, we use up-to-date technology stacks. When needed, we use message brokers and asynchronous queues.
We take responsibility for database design and setup — from selecting the database type to optimizing queries and indexes. In products that store orders, transactions, profiles, and activity logs, we design schemas, relationships, and constraints so data remains consistent and searches stay fast. When needed, our backend developers analyze the causes of slow queries, configure indexes, split data into separate tables, and apply caching.
We develop the server side of applications and websites with integrations for payment systems, mailing services, analytics, CRM, and other external solutions. We ensure that the server side processes payments, confirms transactions, sends email notifications, and transfers data to the company’s accounting system. We pay special attention to error handling, retries, logging, and security. As a responsible JavaScript and Java backend developer, we build a reliable integration layer on which the product can confidently evolve.
We conduct backend audits and take over support for the server side of live projects when a service has grown faster than expected or requires additional attention. As part of the audit, we analyze the architecture, code quality, database operations, and integrations, and review logs and system behavior under load. Based on the monitoring results, we provide a clear list of issues and recommendations for improvement. Then we enhance the system step by step without interrupting its operation. We preserve your investment in building the server side of the application and bring the App or website’s functionality to a stable state.
technologies
Why clients choose us
We organize the development of the server side of applications and websites so that it helps achieve product goals — processing orders without failures, handling payments, serving thousands of users simultaneously, and not “going down” at peak moments. Before starting work, we clarify the scope of scenarios, the list of critical operations, and the acceptable response time. Then we design the architecture with these parameters in mind. FreeBlock backend developers do not just write code — they build the foundation your business relies on.
We take on 100% of the work. The full cycle includes backend creation, testing, production deployment, monitoring, and ongoing support. We help define requirements, choose the tech stack, and plan the stages. Then our backend team develops and launches the service. After release, we stay involved — tracking errors, updating dependencies, adding new modules, and adapting the system to growing load.
We build backend development with security requirements in mind. We design authorization and authentication, role-based access control, protection against common attacks, and secure data storage. In projects that process personal data, payments, or sensitive information, FreeBlock backend developers implement encryption, logging, and access control requirements. We reduce the risks of leaks and ensure compliance with internal policies and industry standards.
We do not tie the creation of the server side of applications and websites to a single language or framework. Instead, we choose tools based on the project’s goals and constraints. For some systems, Java and Spring Boot are the right fit; for others, JavaScript and Node.js are better suited. For certain solutions, a combination of technologies is more effective. We discuss the pros and cons of each option with you, explain the consequences of each choice, and assemble the final stack that fits your specific case. This helps avoid situations where the server side looks modern but does not solve practical business tasks.
We act as a full-cycle backend development partner and help those looking for a backend developer to strengthen their in-house team. We can join as an external backend team, take on part of the workload, or build a collaborative process with specialists who are already working on the project. This format is especially convenient when you need to speed up a release, cover a complex area, or add architecture and optimization experts to the project. As a result, the business gets both quality code and a reliable backend partner.
development
stages
Preliminary analysis and requirements definition
Design and modeling
Architecture development and core component design.
Testing
Development and programming
Business logic modeling and technical specification creation.
Audit and security review
Deployment and integration
Monitoring and support
Delegate your backend to us and focus on your business
We are ready to take on the backend development of your product — whether it is a new platform, an AI-powered service, a Web3 solution, or an existing project that needs support. You can turn to us if you want to start building the server side of an application or website from scratch, conduct a backend audit, strengthen your team, or prepare the system for growing load. We will discuss the task, propose an architectural approach, assess the scope of work, and gradually bring the server side to a stable and predictable state. We will help you build a backend you can rely on.