API Development Without Breaking Changes
Design APIs with versioning, contracts, and documentation so updates don't become emergencies.
👋 Talk to an API expert.
Trusted and top rated tech team
APIs designed to last
APIs get built fast and documented later, if at all. Then updates break mobile apps, partners complain about inconsistent responses, and internal teams build workarounds instead of integrations. We design APIs with contracts, versioning, and documentation from the start so your system can evolve without breaking the consumers who depend on it.
Our capabilities include:
- REST API design and development
- API versioning and deprecation strategies
- OpenAPI specification and contract-first design
- Developer documentation and onboarding
- API gateway configuration and security
- Legacy API modernization and refactoring
Who we support
Bad APIs slow everyone down. Internal teams build workarounds, partners open tickets, and updates turn into fire drills. We help teams build APIs that developers actually want to integrate with.
Teams Building New Integrations
You're adding APIs to connect systems, enable partners, or expose product functionality. But nobody on your team has designed a public-facing API before, and you need it done right the first time with versioning, documentation, and security included.
Companies With API Sprawl
You have dozens of endpoints built by different teams at different times. Naming is inconsistent, documentation is scattered or missing, and nobody knows what's deprecated. You need consolidation and standards, not more endpoints.
Teams Where the API Is the Product
Your API is what customers pay for. Developer experience matters as much as uptime. You need clean design, clear documentation, and a versioning strategy that lets you ship improvements without breaking paying integrations.
Ways to engage
We offer a wide range of engagement models to meet our clients’ needs. From hourly consultation to fully managed solutions, our engagement models are designed to be flexible and customizable.
Staff Augmentation
Get access to on-demand product and engineering team talent that gives your company the flexibility to scale up and down as business needs ebb and flow.
Retainer Services
Retainers are perfect for companies that have a fully built product in maintenance mode. We'll give you peace of mind by keeping your software running, secure, and up to date.
Project Engagement
Project-based contracts that can range from small-scale audit and strategy sessions to more intricate replatforming or build from scratch initiatives.
We'll spec out a custom engagement model for you
Invested in creating success and defining new standards
At Curotec, we do more than deliver cutting-edge solutions — we build lasting partnerships. It’s the trust and collaboration we foster with our clients that make CEOs, CTOs, and CMOs consistently choose Curotec as their go-to partner.
Why choose Curotec for API development?
Our engineers design APIs with contracts, versioning, and documentation built in from the start. We understand REST conventions, backwards compatibility, and the developer experience that determines whether your API gets adopted or abandoned. You get APIs that last, not endpoints that become tech debt.
1
Extraordinary people, exceptional outcomes
Our outstanding team represents our greatest asset. With business acumen, we translate objectives into solutions. Intellectual agility drives efficient software development problem-solving. Superior communication ensures seamless teamwork integration.
2
Deep technical expertise
We don’t claim to be experts in every framework and language. Instead, we focus on the tech ecosystems in which we excel, selecting engagements that align with our competencies for optimal results. Moreover, we offer pre-developed components and scaffolding to save you time and money.
3
Balancing innovation with practicality
We stay ahead of industry trends and innovations, avoiding the hype of every new technology fad. Focusing on innovations with real commercial potential, we guide you through the ever-changing tech landscape, helping you embrace proven technologies and cutting-edge advancements.
4
Flexibility in our approach
We offer a range of flexible working arrangements to meet your specific needs. Whether you prefer our end-to-end project delivery, embedding our experts within your teams, or consulting and retainer options, we have a solution designed to suit you.
API development capabilities for lasting integrations
REST API Design
Contract-First Development
Versioning & Deprecation
Developer Documentation
Authentication & Security
API Gateway & Management
Tools and technologies for API development
API Design & Specification
Our engineers define API contracts using specification languages that document endpoints before code gets written.
- OpenAPI Specification — Industry standard format for describing REST APIs with endpoints, parameters, responses, and schemas in YAML or JSON
- Swagger Editor — Browser-based editor for writing OpenAPI specs with real-time validation, error highlighting, and preview rendering
- Stoplight Studio — Visual API design tool with form-based editing, mock servers, and style guides for consistent API governance
- Postman — API platform for designing, testing, and documenting APIs with collections, environments, and team collaboration features
- Insomnia — API client with design features, environment management, and Git sync for version-controlled API development
- Redocly — API design and documentation platform with linting rules, style enforcement, and developer portal generation
Development Frameworks
Curotec builds APIs with frameworks that handle routing, validation, and serialization across multiple languages.
- Express.js — Minimal Node.js framework for building REST APIs with middleware support, routing, and extensive ecosystem of plugins
- FastAPI — Python framework with automatic OpenAPI generation, type hints, async support, and built-in validation using Pydantic
- Spring Boot — Java framework for building production-ready APIs with dependency injection, security, and enterprise integration patterns
- Laravel — PHP framework with API resources, route model binding, and authentication scaffolding for rapid API development
- ASP.NET Core — Microsoft framework for building APIs in C# with model binding, versioning middleware, and OpenAPI integration
- Django REST Framework — Python toolkit that adds serialization, authentication, and browsable API interfaces to Django applications
Testing & Validation
We test APIs for functionality, performance, and contract compliance using tools that catch issues before deployment.
- Postman — API testing with collections, automated test scripts, environment variables, and CI/CD integration for continuous validation
- Newman — Command-line runner for Postman collections that executes tests in CI pipelines and generates reports
- REST Assured — Java library for testing REST APIs with fluent syntax for validating responses, headers, and JSON payloads
- Dredd — Contract testing tool that validates API implementations against OpenAPI specifications to catch drift
- Pact — Consumer-driven contract testing framework that verifies API compatibility between services during development
- k6 — Load testing tool for APIs with JavaScript scripting, performance thresholds, and integrations for CI/CD workflows
Documentation Platforms
Our teams generate interactive documentation from specifications so developers can explore and test endpoints directly.
- Swagger UI — Interactive documentation renderer that lets developers explore endpoints, view schemas, and test requests directly in the browser
- Redoc — Clean, responsive documentation generator from OpenAPI specs with three-panel layout and deep linking support
- ReadMe — Developer hub platform with API reference, guides, changelogs, and usage analytics for tracking adoption
- Stoplight Elements — Embeddable documentation components that render OpenAPI specs with try-it functionality inside existing sites
- Slate — Open-source documentation generator with three-column layout, code samples in multiple languages, and Markdown authoring
- GitBook — Documentation platform with versioning, API blocks, and collaboration features for maintaining technical docs alongside code
Gateway & Management
Curotec configures gateways that handle routing, rate limiting, and analytics across API traffic at scale.
- Kong — Open-source gateway with plugins for authentication, rate limiting, logging, and traffic control across services
- AWS API Gateway — Managed service for creating, deploying, and managing APIs with throttling, caching, and Lambda integration
- Azure API Management — Microsoft gateway with developer portal, policy engine, analytics, and hybrid deployment options
- Apigee — Google Cloud platform for API management with traffic routing, monetization, and developer engagement tools
- Tyk — Open-source gateway with GraphQL support, rate limiting, analytics dashboards, and Kubernetes-native deployment
- MuleSoft Anypoint — Enterprise integration platform with API gateway, design tools, and connectivity to hundreds of systems
Authentication & Authorization
We implement authentication flows using standards and libraries that protect APIs without complicating integration.
- OAuth 2.0 — Authorization standard for secure delegated access with flows for web apps, mobile clients, and server-to-server communication
- Auth0 — Identity platform with authentication APIs, social login, MFA, and JWT handling for securing APIs without building auth from scratch
- Keycloak — Open-source identity provider with OAuth, OIDC, and SAML support for self-hosted authentication and user management
- AWS Cognito — Managed identity service with user pools, federated identities, and API Gateway integration for serverless auth
- Passport.js — Node.js authentication middleware with strategies for OAuth, JWT, API keys, and hundreds of identity providers
- JSON Web Tokens — Token standard for stateless authentication with claims, expiration, and signature verification across services
FAQs about our API development services
Should we use REST or GraphQL?
REST works well for most cases with predictable endpoints and caching. GraphQL shines when clients need flexible queries or you’re serving multiple frontends with different data needs. We evaluate your use case and recommend what fits, not what’s trendy.
How do you handle API versioning?
We implement versioning strategies like URL paths or headers, combined with deprecation policies that give consumers time to migrate. You can ship improvements while legacy integrations keep working until they’re ready to update.
Can you document our existing APIs?
Yes. We reverse-engineer existing endpoints, create OpenAPI specifications, and generate interactive documentation. We also establish standards so new endpoints get documented automatically as part of the development process.
How do you approach API security?
We layer OAuth flows, rate limiting, input validation, and proper error handling so APIs don’t leak information. Security gets designed in from the start, not bolted on after a penetration test finds problems.
Our APIs are inconsistent across teams. Can you help?
We audit existing endpoints, identify the most critical inconsistencies, and create governance standards. Then we prioritize which APIs to refactor based on usage and pain. You don’t have to fix everything at once.
How long does it take to build a production-ready API?
Simple APIs with a few endpoints take weeks. Complex APIs with multiple resources, authentication, and documentation take a few months. We scope based on your requirements and can phase delivery so you’re shipping value early.
Ready to have a conversation?
We’re here to discuss how we can partner, sharing our knowledge and experience for your product development needs. Get started driving your business forward.
