INTERFACE PROGRAMMING FOR MOBILE APPS
Discover the possibilities of seamless integration for mobile applications: We develop high-performance mobile backends and reliable APIs for iOS/Android that securely connect your apps with ERP, CMS, PIM, payment & co. This allows you to optimize processes, increase data quality - and get the maximum benefit from your mobile and server-side infrastructure.
How do we proceed?
First, we create a deep understanding of your app use cases, data flows and systems. Based on this, we define API interfaces, security, offline/sync strategies and the appropriate hybrid architecture for React Native or Capacitor - including GDPR and store requirements.
Our project management balances quality, time and budget. Using Scrum/Kanban, we deliver in short cycles, instrument backends and apps early on with observability (logs, metrics, traces) and closely involve stakeholders via testflight/play console and staging environments.
For smaller, clearly defined integration tasks, we rely on a compact, phase-oriented approach with a clear scope and defined acceptance criteria.
What exactly can we do for you?
Our development team specializes in interface programming. We connect your IT systems and software components to create a customized, high-performance overall system. By using interfaces, we can help you become more efficient: Automate workflows, synchronize data between systems and improve the efficiency of your business processes.
Development & integration of data warehouse apps
We open up DW/BI data specifically for mobile apps - via high-performance API endpoints, caching and secure access paths so that insights and KPIs arrive where users need them.
Middleware development for networking complex apps
We build lean middleware as the backbone for your app integration: decoupled services, eventing/webhooks and transformations ensure robust flows between the backend, third-party APIs and mobile app.
Optimization and expansion of your existing interfaces
We analyze existing APIs in terms of performance, security, versioning and DX - and extend them specifically for mobile requirements (pagination, delta sync, rate limits, push triggers).
Integration and connection of any software systems
We connect CMS, ERP, PIM, stores, payment, identity providers and IoT platforms with your React-Native/Capacitor apps. This creates standardized data models and traceable processes across all touchpoints.
Automation of data flows and processes
We automate sync jobs, notification pipelines and back-office workflows - reliably, auditably and with clear retries/fallbacks for mobile scenarios.
Analysis of your interface requirements
We collect app-specific requirements (Auth, rights, offline, latency) and derive API designs, SLAs and roadmaps from them - prioritized according to business impact and time-to-market.
Customer examples
Our customers
„The devsuit team's expertise in app development and their advice in the areas of web technologies and interfaces has convinced us time and again and ensured successful project work.“
Martin Jablonski-Zimare, Managing director of ideenmanufaktur
OUR SERVICES, TAILOR-MADE FOR YOU
Get in touch with us
Do you have any questions or suggestions? Send us a message and we will get back to you.
API development process
Requirements analysis
We start by gaining a precise understanding of your app ideas, user paths and data sources. Specifically, we record what information your mobile app (React Native or Capacitor) needs and when, how often it retrieves it and what should happen offline. This results in a picture of the most important endpoints (the "doors" to the interface), the desired response times and the error cases that we want to elegantly intercept.
Together, we define service promises (e.g. "response in X ms" or "this many requests per minute"). We also clarify everything to do with data protection (GDPR) and security: Who can see what? Which data is sensitive? What roles and authorizations do we need? We check existing systems such as ERP, CMS, PIM, payment or identity providers and determine where data is generated and who owns it.
To ensure that nothing is overlooked, we collect risks and assumptions (for example: "This third-party API has strict limits"). The result is a prioritized API backlog - a sorted list of the most important tasks and endpoints that will quickly deliver tangible benefits for your mobile app.
Together, we define service promises (e.g. "response in X ms" or "this many requests per minute"). We also clarify everything to do with data protection (GDPR) and security: Who can see what? Which data is sensitive? What roles and authorizations do we need? We check existing systems such as ERP, CMS, PIM, payment or identity providers and determine where data is generated and who owns it.
To ensure that nothing is overlooked, we collect risks and assumptions (for example: "This third-party API has strict limits"). The result is a prioritized API backlog - a sorted list of the most important tasks and endpoints that will quickly deliver tangible benefits for your mobile app.
Concept & Architecture
Based on the analysis, we design an easily understandable and expandable architecture. We often use REST (the standard for many interfaces) or GraphQL (a flexible query language that allows apps to get exactly the data they need). For the app, we often use a BFF - Backend for Frontend: a thin layer specifically for your mobile app that bundles data from different systems and tailors it appropriately.
For security, we rely on OAuth 2.1/OIDC - a proven standard for logins. With PKCE (an additional protection mechanism) and short-lived access tokens, logins remain secure without making them unnecessarily difficult to use. Roles and authorizations ensure that everyone only sees what is really necessary. We also plan versioning (e.g. /v1, /v2) from the outset so that older app versions continue to work if something changes.
We define clear error patterns ("What happens if something goes wrong?"), fair throttling in the event of too many requests and caching so that answers are provided quickly. By observability, we mean the visibility of the system: logs, measured values and process traces that allow us to easily recognize later where things are going wrong. The end result is a clear API design with brief explanations, examples and a security concept that suits the app and your business.
For security, we rely on OAuth 2.1/OIDC - a proven standard for logins. With PKCE (an additional protection mechanism) and short-lived access tokens, logins remain secure without making them unnecessarily difficult to use. Roles and authorizations ensure that everyone only sees what is really necessary. We also plan versioning (e.g. /v1, /v2) from the outset so that older app versions continue to work if something changes.
We define clear error patterns ("What happens if something goes wrong?"), fair throttling in the event of too many requests and caching so that answers are provided quickly. By observability, we mean the visibility of the system: logs, measured values and process traces that allow us to easily recognize later where things are going wrong. The end result is a clear API design with brief explanations, examples and a security concept that suits the app and your business.
Development
During implementation, we pay attention to clear endpoints, standardized responses and testable rules. We use contract tests to ensure that the app and interface refer to the same object: What is requested? What is guaranteed to be delivered? A mock server enables the app team to test early on, even if not everything is ready yet.
We work iteratively: in short sprints, we deliver functional intermediate steps, release SDKs/client libraries for React Native/Capacitor and automate the checking of quality (tests) and delivery (CI/CD). We ensure speed and a good user experience through fast server responses, sophisticated pagination (dividing large lists into easily digestible portions) and asynchronous processing in the background if something takes longer.
Security remains on board: input is checked, secret keys are securely stored and signed webhooks (callbacks from the server) prevent manipulation. With feature flags (switches for functions) and staged rollouts (publication in small groups), we bring new features into use with low risk. This makes your app more stable, faster and more useful step by step - without big-bang updates.
We work iteratively: in short sprints, we deliver functional intermediate steps, release SDKs/client libraries for React Native/Capacitor and automate the checking of quality (tests) and delivery (CI/CD). We ensure speed and a good user experience through fast server responses, sophisticated pagination (dividing large lists into easily digestible portions) and asynchronous processing in the background if something takes longer.
Security remains on board: input is checked, secret keys are securely stored and signed webhooks (callbacks from the server) prevent manipulation. With feature flags (switches for functions) and staged rollouts (publication in small groups), we bring new features into use with low risk. This makes your app more stable, faster and more useful step by step - without big-bang updates.
Hosting & Maintenance
We choose a scalable platform for operation: containers/Kubernetes or serverless, depending on requirements. The important thing is not the technology itself, but that the system is reliable, affordable and easy to operate. With infrastructure as code (the infrastructure is documented as a script), changes remain traceable and repeatable.
We set up monitoring and alerts so that we notice early on if something is getting out of hand (e.g. slower responses or increased errors) Dashboards combine the app view (e.g. crashes, loading times) with the backend view (e.g. utilization, error types). Together with service target values (SLOs - "this is how good we want to be"), we control when we optimize and where it is most beneficial.
Security and version updates, backups and recovery plans are part of everyday life. We take a cautious approach to changes to data formats or authorizations so that older app versions continue to work. We learn from usage data which endpoints are popular, where there are problems and which enhancements bring real added value (e.g. new filters, batch endpoints or better offline synchronization). This keeps interfaces and mobile backends robust in the long term - and your app can grow with peace of mind.
We set up monitoring and alerts so that we notice early on if something is getting out of hand (e.g. slower responses or increased errors) Dashboards combine the app view (e.g. crashes, loading times) with the backend view (e.g. utilization, error types). Together with service target values (SLOs - "this is how good we want to be"), we control when we optimize and where it is most beneficial.
Security and version updates, backups and recovery plans are part of everyday life. We take a cautious approach to changes to data formats or authorizations so that older app versions continue to work. We learn from usage data which endpoints are popular, where there are problems and which enhancements bring real added value (e.g. new filters, batch endpoints or better offline synchronization). This keeps interfaces and mobile backends robust in the long term - and your app can grow with peace of mind.
And how can we support you?
Certified know-how
CONTACT OUR TEAM
We are your partner for customized software and IT solutions based in Berlin. You are welcome to arrange a non-binding initial consultation with us. We look forward to your project!
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