Managed backend services
Use services such as Supabase or Firebase when their data model, access controls and operational features fit the product. We still design permissions, integrations and application behavior explicitly.
Backend & Cloud EngineeringBackend & cloud engineering.
Backend & cloud engineering.
Built for the work behind your product.
Connect your apps to reliable APIs, well-structured data and clear access rules. We build and improve backend systems with the deployment, monitoring and documentation needed to operate them.
From the first API contract to production operations and handover.
The service, in plain terms
What does backend and cloud engineering include?
Nautilus Techlabs builds and improves the backend systems behind mobile apps, web products and internal tools. Our backend and cloud engineering service covers API design, databases, authentication, integrations, deployment and production operations.
That can mean a backend for a new product, a shared API for several applications or targeted improvements to an existing system. We define what belongs in the client, what belongs on the server and how the system should behave when dependencies fail.
What We Deliver
The services behind a dependable product.
Choose the capabilities your application needs. We agree the interfaces, responsibilities and operating requirements before implementation.
API design & development
Give your applications a clear, reliable way to work with business data. Define contracts around real workflows and keep validation and privileged operations on the server.
- REST endpoints and documented API contracts
- Input validation, pagination and error handling
- Versioning and compatibility for existing clients
Database architecture & performance
Model your data around how the product reads, writes and reports on it. Review query patterns and growth expectations before choosing indexes or changing storage.
- PostgreSQL schemas and data relationships
- Migrations, query review and indexing
- Data integrity and access-policy tests
Authentication & authorization
Connect user accounts to the actions and records they are allowed to access. Verify permissions at the API or database boundary, including administrative workflows.
- Sign-in, session and account lifecycle flows
- Role-based permissions and tenant separation
- Server-side secrets and privileged operations
Integrations & background workflows
Connect payment providers, notifications and business systems with a plan for delayed, duplicate or failed requests. Move suitable long-running work out of interactive user flows.
- External APIs and verified webhooks
- Queues, scheduled jobs and retry handling
- Idempotency and reconciliation workflows
Cloud deployment & release setup
Prepare environments and deployment workflows your team can repeat and maintain. Agree how configuration, schema changes and releases are reviewed before production.
- Development, staging and production setup
- CI/CD and environment configuration
- Backup configuration and recovery planning
Monitoring, optimization & support
Make operational behavior visible so the team can investigate failures and plan improvements. Tune the system using observed traffic, database load and infrastructure usage.
- Logs, metrics, alerts and error tracking
- Load testing and bottleneck investigation
- Usage-cost review and operating documentation
Architecture That Fits
Managed services, custom APIs or a combination?
The right approach depends on your workflows, data, team and operating constraints. We consider development effort, service limits and maintenance together.
Custom backend APIs
Build application services with Node.js and TypeScript when the product needs custom business rules, integration logic or an API used by multiple clients.
Cloud functions & background jobs
Handle suitable event-driven tasks, scheduled work and privileged operations outside the client app. We account for execution limits, retries and the state needed to recover from failures.
Existing-system improvements
Review an established backend before proposing changes. Prioritize slow queries, unreliable integrations, access gaps or deployment friction while preserving the contracts existing clients depend on.
A stack selected for your scope
How We Work
From business rules to working services.
Make contracts and responsibilities explicit, deliver in reviewable increments and test the system before production traffic depends on it.
Map requirements & data
Review the client applications, user roles, business workflows and existing systems. Agree data ownership, integration boundaries and the initial operating requirements.
You receiveScope, data flows and technical prioritiesDesign the foundations
Define API contracts, database structures and authorization rules. Identify migration risks, external dependencies and the tests needed to validate the design.
You receiveArchitecture, contracts and delivery planBuild & verify
Implement services in reviewable increments. Test normal flows, permissions, duplicate requests and failure recovery, then integrate with the client applications.
You receiveWorking backend and integration testsDeploy & operate
Prepare production configuration, monitoring and release procedures. Verify the deployment, document recovery steps and agree support responsibilities.
You receiveProduction release and operating guide
Ready to Operate
Plan for access, load, failures and change.
A working endpoint is part of the job. The team also needs to understand who can use it, how it behaves under load and what to do when it fails.
Enforce permissions where data is handled
Model access by role, ownership and organization. Apply the controls appropriate to each access path, including database policies, API authorization and privileged background work.
- Tests for unauthorized and cross-tenant access
- Protected credentials and restricted service permissions
- Validation and logging with sensitive data in mind
Design recovery around the workflow
Define what happens when an API times out, a job is repeated or a dependency is unavailable. Plan backup coverage and test restoration against the recovery requirements agreed for the product.
- Retry limits, idempotency and reconciliation
- Backup coverage for database records and stored files
- Documented recovery steps and escalation ownership
Measure before expanding infrastructure
Review slow queries, expensive requests and background workloads. Use representative load tests and usage data to guide indexing, caching or capacity changes. Agree performance targets and investigate cost drivers as traffic evolves.
Make the system maintainable by your team
Separate environments, version database migrations and document deployment procedures. Plan changes around existing clients and make operational responsibilities clear.
See backend decisions in our exam-prep case studyScope Before Estimates
What will your backend cost to build and run?
Development follows the workflows, integrations and data requirements. Operating cost depends on usage, storage and the services selected. We review both when defining the approach.
Get a Backend Scope & EstimateStart with your product and its data.
- Client applications: mobile apps, websites, internal tools and the workflows they need.
- Data and access: entities, user roles, organizations and sensitive records.
- Dependencies: payment services, external APIs, existing databases and migration needs.
- Operating expectations: traffic, storage, response times, recovery needs and support coverage.
Choose a new backend build, a focused improvement project or ongoing engineering support. Compare engagement options. If you also need the client app, explore Flutter app development.
Clear Answers
Backend & cloud engineering FAQs
What is backend and cloud engineering?
Backend engineering builds the APIs, databases and business logic behind an application. Cloud engineering covers how those systems are deployed, configured, monitored and maintained. Together, they support the data and workflows that your mobile, web or internal interfaces use.
Can you build a backend for our existing app or website?
Yes. We review the current client, API contracts, data model and authentication setup. We can build missing services or improve the existing backend, planning compatibility so published app versions and active users can continue using the system during the transition.
Do you work with Supabase, Firebase and custom APIs?
Yes. Our scope can include Supabase, Firebase, PostgreSQL and custom services built with Node.js and TypeScript. We select the approach around the data model, integrations, access requirements and operating needs, including the tradeoffs of your existing stack.
How do you protect user data and control access?
We define permissions around user roles and data ownership, enforce them at the backend boundary and test unauthorized access paths. The scope includes server-side secrets, input validation and appropriate logging. Specific security or regulatory requirements need to be identified and assessed for the project.
Can you support multiple organizations in one product?
Yes. We design how each organization owns its records and how users receive access. Tenant boundaries must be enforced in queries, authorization rules and background jobs. We test cross-organization access attempts rather than relying on the interface to hide other tenants’ data.
Can you migrate an existing database or backend?
Yes, after reviewing data quality, dependencies and the current clients. The plan can include schema mapping, rehearsed imports, validation and a defined cutover. Downtime and recovery options depend on the systems involved; we agree these before the production migration.
Can the backend scale as our product grows?
We design for agreed traffic and data expectations, then use monitoring and representative load tests to identify constraints. Scaling may involve query improvements, caching, background processing or infrastructure changes. Capacity and operating cost should be evaluated against actual workload rather than assumed to be unlimited.
Do you handle payments, webhooks and third-party APIs?
Yes. We integrate the agreed providers and define how requests are authenticated, validated and retried. Webhook processing includes handling duplicate delivery and reconciling state with the provider where needed, so a repeated notification does not trigger an unintended repeated action.
How much does backend development cost?
We estimate from the workflows, data model, integrations, migration requirements and operating expectations. Development and ongoing cloud usage are separate cost factors. Reviewing likely traffic, storage and background work helps us outline the scope and the main cost drivers.
Who owns the backend, and do you provide ongoing support?
You own 100% of the custom project source code and intellectual property. We plan deployment through your accounts and provide repository access, configuration guidance and handover documentation. Monitoring, maintenance and incident support are agreed separately with clear responsibilities and coverage.
Build the Foundations for Your Next Release
Let’s plan your backend.
Share your product requirements or the system you want to improve. We’ll help define the data flows, technical priorities and next useful step.