Backend development
Build the business logic, APIs, databases and integrations behind your product. Launch a new service or improve an existing backend.
No specification yet? Start with your idea and the problem to solve.
01 / CAPABILITIES
What we can build
APIs and business logic
REST, events, calculations, operation states and interfaces for applications.
Data and integrations
Storage models, migrations, search and external service connections.
Service reliability
Authorisation, retries, queues, logging and observability.
02 / DELIVERABLES
What your team receives
Map product operations, user roles and external dependencies. Use them to design APIs and data models that support complete workflows.
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Data model
Entities, relationships, constraints and update rules.
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Server application
APIs, background jobs and administrative operations.
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Documentation and tests
API contracts, failure scenarios and integration checks.
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Release environment
Configuration, migrations and deployment instructions.
03 / OUR EXPERIENCE
Projects by our team
View all case studiesProjects from our portfolio. Each case study describes its scope, technologies and implemented features.
Euro Life
Job application collection service
True Detects
Front-End for an Analytical Trading Service
Money Ninja
Telegram Mini App with a PvP Mode
Alo Finance
Investor Dashboard
04 / ENGINEERING
What we consider before development
Repeated operations
Prevent duplicates when requests or events are retried.
Data access
Separate user, service and administrator permissions.
Predictable migrations
Plan version compatibility, backups and rollback procedures.
Technologies and integrations
Technologies
05 / COST AND TIMELINE
An estimate tailored to your project
We agree on the first release and acceptance criteria, then estimate development, integrations and testing by stage.
First release
Product operations, background jobs and permissions.
Logic and integrations
Data migration, external APIs and event handling.
Testing and launch
Failure scenarios, workload and deployment requirements.
06 / PROCESS
From discussion to a working product
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Understand the scope
Review the product, users and constraints. Agree on priorities.
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Design the solution
Define workflows, architecture and acceptance criteria.
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Build and validate
Share progress and test features and integrations.
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Release and hand over
Prepare the release, deliver source code and agree on further support.
What our clients say
All reviewsIn the end, we received a complete, working product. The team is responsible, stays in touch and is committed to the outcome. I can recommend them for complex development projects.
Product development
Review excerpt
The team immersed themselves in the project and proposed a clear architecture and a phased work plan. All the key MVP features were implemented with security and scalability requirements in mind.
Crypto wallet · Web & Mobile
Review excerpt
07 / GOOD TO KNOW
Questions and answers
What does backend development at FreeBlock include?
Architecture design, server-side business logic, database work, APIs, integrations with external services, deployment and monitoring. We can build a backend from scratch or take over support of an existing one.
Which stack do you use on the backend?
We use Node.js, NestJS, TypeScript, Python and other tools suited to the architecture. Storage and caching can use PostgreSQL, MySQL and Redis; deployments use Docker and Kubernetes where appropriate.
How do you design and document APIs?
We build REST or GraphQL APIs with versioning, JWT or OAuth authorization and auto-generated OpenAPI documentation, so frontend and third-party teams can integrate without endless calls.
Will your backend handle traffic growth?
Yes — we plan for scale from the start: horizontal scaling of services, caching, and queues for heavy operations. Before launch we run load tests on scenarios close to real production traffic.
How do you estimate the timeline and budget for the server side?
The main factors are business logic, API complexity, data models, integrations and reliability requirements. We assess the existing code and infrastructure, then estimate development, migration and testing by stage.
What does backend support after release include?
Monitoring and alerting, incident investigation, database query optimization, security updates and evolving the API for new product features.
Discuss your project
Let’s start with your project
Tell us what you want to build or improve. We will discuss the first release, dependencies and next steps.