Fully allocated API team
Long-term integration support
Deep product knowledge
API development and integration services
API development and integration services to establish reliable data exchange between internal systems, customer-facing platforms, and third-party tools. Our teams prepare your data, bridge legacy and modern systems, build APIs and integration layers that reduce manual work, improve operational visibility, and keep business processes stable as systems, data volumes, and integration needs grow.
Benefits
Business systems still disconnected? Data inconsistent and getting lost on the way? Custom API development and integration services help connect operations, systems, and data
Disconnected systems are costly even in small operations: orders are copied by hand, stock levels differ across platforms, reports do not match, and teams wait for updates from each other. All of these are wasted resources. API development and integration services help remove these gaps so business processes can run with fewer errors, faster updates, and less dependence on manual coordination.
Data consistency across departments
Keeps sales, finance, operations, support, and management teams working with the same data
Reduces mismatched records between CRM, ERP, ecommerce, warehouse, and accounting systems
Helps managers make decisions based on current business activity, not manually updated reports
Manual workload reduction
Reduces repeated data entry between business tools, internal systems, and external platforms
Helps teams avoid copying orders, customer details, payment statuses, or inventory updates by hand
Frees specialists from routine checks so they can focus on work that needs human decision-making
Connected orders, payments, and inventory
Helps orders from websites, marketplaces, or portals move automatically into ERP or CRM systems
Keeps inventory, order statuses, customer records, and payment updates aligned across connected platforms
Supports business processes that depend on several systems working together without manual coordination
Legacy system value
Connects older internal systems with newer software without forcing a full replacement
Uses APIs, adapters, or connectors when legacy systems cannot exchange data directly
Helps transform legacy data into formats that newer systems, platforms, or services can process
Access control and data protection
Controls which users, systems, and external services can access specific data
Protects sensitive information through authentication, authorization, validation, and encryption rules
Reduces risks when internal systems exchange data with third-party tools or regulated environments
Foundation for automation and AI
Gives automation tools and AI systems structured access to reliable business data
Reduces the risk of AI tools working with outdated, incomplete, or disconnected information
Creates a stronger technical base for reporting, forecasting, workflow automation, and future AI use cases
Growth without manual bottlenecks
Helps the company process more orders, users, transactions, or internal requests without proportional manual work
Makes it easier to add new tools, services, or platforms as the business grows
Reduces dependence on people who know how disconnected processes work manually
Data infrastructure audit
Helps identify where business data is stored, duplicated, delayed, or lost across existing systems
Shows which integrations, data flows, or manual steps create operational gaps and reporting issues
Gives teams a clearer starting point before automation, analytics, AI, or system modernization begins
Need a Single Source of Truth across your systems?
KPS will define the right API strategy, identify integration priorities, and estimate the scope of work so your systems can support daily operations without unnecessary complexity.
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Our Services
Services our API development & integration services company provides
Our team reviews how data is blocked, duplicated, transformed, or manually moved across the current infrastructure, then builds APIs, connectors, or integration layers that make these flows more secure, stable, and easier to extend.
01
API strategy and integration planning
Solution architects and business analysts review how data moves between your systems today, where manual work appears, and which workflows depend on several tools working together. This helps define integration priorities, avoid unnecessary development, and align API work with real operational needs.
02
Custom API development
Backend engineers develop custom APIs for software applications that need controlled data exchange, specific business logic, or secure access to internal functionality. These APIs are designed around your workflows, user roles, data formats, access rules, error handling, and long-term maintenance needs.
03
Web and mobile API development
Backend, web, and mobile engineers build APIs that connect customer-facing interfaces with backend systems and internal tools. This helps web apps, mobile apps, and portals display current operational data, process user requests, and avoid disconnected product experiences.
04
Third-party API integration
Integration specialists connect your software with external services such as payment gateways, CRM systems, accounting tools, marketplaces, delivery services, cloud platforms, or communication tools. When third-party documentation is outdated or incomplete, our team validates API behavior, checks integration requirements, and communicates with vendors when needed.
05
Legacy system integration
Technical teams connect legacy software with newer applications, cloud platforms, web portals, or mobile apps. When older systems cannot exchange data directly, KPS can build adapters or connectors that transform legacy data into formats newer systems can process.
06
Data mapping and synchronization
Backend engineers define how data should be matched, transformed, validated, and synchronized across several systems. This helps reduce duplicates, prevent conflicting records, and support workflows where some services update data in real time while others use scheduled synchronization.
07
API security and access control
Backend and security specialists define authentication, authorization, data validation, encryption, and access rules for API usage. This helps control which users, systems, or external services can access sensitive data and reduces risks across connected environments.
08
API testing and validation
QA engineers test API requests, data flows, error handling, input validation, synchronization logic, and system behavior under expected usage conditions. This helps identify integration issues before release and ensures that a single failed request does not break the entire business process.
09
API documentation and management
Technical specialists prepare API documentation and management rules for internal teams, partners, or future developers. This helps keep API usage clear, supports version changes, and makes future integrations easier to maintain.
10
API maintenance and ongoing support
Support and engineering teams monitor API behavior, investigate integration issues, and update APIs when systems, workflows, traffic volumes, or external services change. This helps keep connected software stable after release and reduces the risk of broken processes during future changes.
Technology Stack
Technology stack for website development and API integration services
KPS chooses API technologies based on production requirements, not generic preferences. The stack should help systems exchange accurate data, support real-time updates where needed, protect access, and remain reliable under growing load.
API architecture and communication
API styles: REST, GraphQL, SOAP, gRPC
Real-time communication: WebSockets, webhooks, Server-Sent Events
Data exchange formats: JSON, XML, Protocol BuffersBackend development
Languages and runtimes: Node.js, Java, .NET, Python, Go
Frameworks: NestJS, Express.js, Spring Boot, ASP.NET Core, Django, FastAPI
Backend architecture: microservices, modular monoliths, event-driven architecturesAPI gateways and management
API gateways: AWS API Gateway, Azure API Management, Google Cloud API Gateway, Kong, Apigee
Management practices: routing, rate limiting, throttling, quotas, API keys
Lifecycle support: API versioning, developer portals, usage policiesDatabases and data synchronization
Relational databases: PostgreSQL, MySQL, Microsoft SQL Server, Oracle
NoSQL and in-memory stores: MongoDB, Redis, Elasticsearch, DynamoDB
Data practices: data mapping, transformation rules, validation, conflict resolution, synchronization rules, schema migrationsCloud infrastructure and DevOps
Cloud platforms: AWS, Google Cloud Platform, Microsoft Azure
Containerization and orchestration: Docker, Kubernetes, Helm
CI/CD and automation: GitHub Actions, GitLab CI, Jenkins, Azure DevOpsSecurity and access control
Authentication and authorization: OAuth 2.0, OpenID Connect, JWT, SAML, role-based access control
Data protection: TLS, data encryption at rest, data encryption in transit
Security practices: input validation, access policies, secret management, audit loggingTesting and quality assurance
API testing tools: Postman, Swagger, Insomnia, REST Assured
Automated testing: Jest, JUnit, PyTest, NUnit
Quality practices: contract testing, integration testing, load testing, regression testingMonitoring and observability
Monitoring and logging: Prometheus, Grafana, ELK Stack, Datadog
Error tracking and diagnostics: Sentry, New Relic
API performance tracking: latency monitoring, request tracing, uptime checksThird-party and integration services
Payment providers: Stripe, PayPal, Braintree
Identity providers: Auth0, Okta, Firebase Authentication
Business systems: CRM systems, ERP systems, accounting software, inventory management systems
Related Services
Supporting services KPS offers for API development and integration
Custom software development
Backend development
Web application development
Mobile app development
Cloud infrastructure and DevOps
Data analytics and reporting platforms
Workflow automation systems
AI solution development
Software architecture assessment
Engagement Models
Working formats offered by our custom API integration development company
API development and integration can be structured in different ways depending on ownership, technical control, and delivery responsibility. KPS offers three main engagement models:
Dedicated API development team
Team extension
API developers join your team
Backend and integration gaps
Under your technical leadership
Managed API development
Defined API delivery scope
Agreed milestones and responsibilities
Specific integrations or phases
Our Process
How KPS structures API development and integration for your systems
We structure the process to reduce integration risks early and make sure each API connection supports real business operations and real-time data exchange after launch.
STEP 1:
Understanding systems, workflows, and constraints
Product stakeholders, domain experts, solution architects, and tech leads review existing software, business workflows, data flows, manual steps, system limitations, and integration goals. This step helps clarify where data is created, where it needs to move, which teams use it, and what business outcome each API connection should support.
STEP 2:
Integration architecture and data flow planning
Once the context is clear, solution architects and senior engineers define how systems should exchange data. This includes API structure, integration boundaries, data mapping, synchronization logic, real-time or batch exchange decisions, business rules, system limitations, and priority workflows. If direct integration is not possible, the team defines whether adapters, connectors, middleware, or data transformation logic will be needed.
STEP 3:
Security, access, and error-handling definition
Before development starts, backend engineers and security specialists define how data should be protected and who can access it. This step covers authentication, authorization, token usage, API keys, encryption, role-based access, input validation, and data protection rules. The team also defines error-handling logic, fallback behavior, and failure scenarios so one broken service does not stop the full business process.
STEP 4:
API, adapter, or connector development
KPS backend engineers develop API logic, configure integration points, and build adapters or connectors when systems cannot communicate directly. This is especially important for legacy systems, different data formats, incomplete third-party documentation, or business tools that require additional data preparation before information can move correctly. Development is carried out in controlled stages so technical and business stakeholders can review progress and validate expected behavior.
STEP 5:
Quality assurance, validation, and risk control
QA engineers and backend developers test API requests, data flows, access rules, synchronization logic, edge cases, failed requests, and integration behavior. Testing helps confirm that systems exchange data correctly and that errors are handled without breaking the entire workflow. Business stakeholders can also validate whether connected systems support the intended operational scenarios before release.
STEP 6:
Deployment, monitoring, and release management
Once the integration meets quality and acceptance criteria, DevOps engineers and backend specialists prepare environments, coordinate deployment, and manage release procedures. The team sets up logs, monitoring, alerts, diagnostics, and performance tracking to make API behavior visible after launch. When needed, the team also checks how integrations behave under expected and growing data volumes.
STEP 7:
Post-launch support and continuous improvement
API work does not stop after release. Once integrations are live, our support team continues to monitor behavior, investigate issues, update documentation, and adjust APIs when workflows, traffic, external services, or internal systems change. This helps your company add new services, tools, or integrations later without rebuilding the whole solution from scratch.
STEP 1:
Understanding systems, workflows, and constraints
Product stakeholders, domain experts, solution architects, and tech leads review existing software, business workflows, data flows, manual steps, system limitations, and integration goals. This step helps clarify where data is created, where it needs to move, which teams use it, and what business outcome each API connection should support.
STEP 2:
Integration architecture and data flow planning
Once the context is clear, solution architects and senior engineers define how systems should exchange data. This includes API structure, integration boundaries, data mapping, synchronization logic, real-time or batch exchange decisions, business rules, system limitations, and priority workflows. If direct integration is not possible, the team defines whether adapters, connectors, middleware, or data transformation logic will be needed.
STEP 3:
Security, access, and error-handling definition
Before development starts, backend engineers and security specialists define how data should be protected and who can access it. This step covers authentication, authorization, token usage, API keys, encryption, role-based access, input validation, and data protection rules. The team also defines error-handling logic, fallback behavior, and failure scenarios so one broken service does not stop the full business process.
STEP 4:
API, adapter, or connector development
KPS backend engineers develop API logic, configure integration points, and build adapters or connectors when systems cannot communicate directly. This is especially important for legacy systems, different data formats, incomplete third-party documentation, or business tools that require additional data preparation before information can move correctly. Development is carried out in controlled stages so technical and business stakeholders can review progress and validate expected behavior.
STEP 5:
Quality assurance, validation, and risk control
QA engineers and backend developers test API requests, data flows, access rules, synchronization logic, edge cases, failed requests, and integration behavior. Testing helps confirm that systems exchange data correctly and that errors are handled without breaking the entire workflow. Business stakeholders can also validate whether connected systems support the intended operational scenarios before release.
STEP 6:
Deployment, monitoring, and release management
Once the integration meets quality and acceptance criteria, DevOps engineers and backend specialists prepare environments, coordinate deployment, and manage release procedures. The team sets up logs, monitoring, alerts, diagnostics, and performance tracking to make API behavior visible after launch. When needed, the team also checks how integrations behave under expected and growing data volumes.
STEP 7:
Post-launch support and continuous improvement
API work does not stop after release. Once integrations are live, our support team continues to monitor behavior, investigate issues, update documentation, and adjust APIs when workflows, traffic, external services, or internal systems change. This helps your company add new services, tools, or integrations later without rebuilding the whole solution from scratch.
Clients' feedback
What clients say about working with KPS
Our clients confirm that KPS teams approach system reliability, delivery quality, communication, and practical problem-solving across API development, integration, backend, and custom software projects.
Naomi Rubinstein
Founder at BettercareThey are the best team we have ever worked with. The application increased the speed of receiving data by 4 times. Data loss was reduced by 10%. Ineffective tasks decreased by 7%. Response rate to customer requests increased by 23%. Our customers have seen significant increases in efficiency.
Aleksandr Podolyan
Technical Specialist & Product Manager., RDO UkraineKultprosvet has executed deliverables perfectly and provided us with a high-quality application. They’ve fulfilled our requirements, and the product perfectly fits our needs. The team’s development efforts have helped our business immensely.
Oleksandr Zainchukivskyi
Head of Technology, AMACOWe've had a very good experience with them. We trust them, and we'll continue to work with them. If we ever need something done, they always deliver.
Luc Lecorre
Luc Lecorre, Co-Investor, Luxury Handbag CompanyKultprosvet was highly knowledgeable, and they made us aware of some issues we hadn’t considered. They explained everything very clearly and helped us understand the broader scope of the work.
Yulia Goldenberg
PhD Researcher, Ben Gurion University of the NegevThe work is always delivered on time, and they are very fair about the pricing. Kultprosvet is transparent, and we know that we can trust them; we are never surprised by anything that comes up.
Cameron Tope
Founder, Rooya (Polysurance)Since working with Kultprosvet, our customers are much happier with the product and its UX. They’ve added flexibility where the system was previously rigid, and they take full responsibility for the project, quickly fixing any issues that arise.
Naomi Rubinstein
Founder at BettercareThey are the best team we have ever worked with. The application increased the speed of receiving data by 4 times. Data loss was reduced by 10%. Ineffective tasks decreased by 7%. Response rate to customer requests increased by 23%. Our customers have seen significant increases in efficiency.
Aleksandr Podolyan
Technical Specialist & Product Manager., RDO UkraineKultprosvet has executed deliverables perfectly and provided us with a high-quality application. They’ve fulfilled our requirements, and the product perfectly fits our needs. The team’s development efforts have helped our business immensely.
Oleksandr Zainchukivskyi
Head of Technology, AMACOWe've had a very good experience with them. We trust them, and we'll continue to work with them. If we ever need something done, they always deliver.
Luc Lecorre
Luc Lecorre, Co-Investor, Luxury Handbag CompanyKultprosvet was highly knowledgeable, and they made us aware of some issues we hadn’t considered. They explained everything very clearly and helped us understand the broader scope of the work.
Yulia Goldenberg
PhD Researcher, Ben Gurion University of the NegevThe work is always delivered on time, and they are very fair about the pricing. Kultprosvet is transparent, and we know that we can trust them; we are never surprised by anything that comes up.
Cameron Tope
Founder, Rooya (Polysurance)OUR TEAM
Want to know who you’ll work with?
Contact our client support team, which will provide you with a technical evaluation of your needs and give you details on the collaboration resources you will need.
Anton Trakht
CEO at Kultprosvet
Mykola Aleksandrov
Account Executive
We are ready to review your requirements and propose a practical next step.
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Help
Since working with Kultprosvet, our customers are much happier with the product and its UX. They’ve added flexibility where the system was previously rigid, and they take full responsibility for the project, quickly fixing any issues that arise.