Backend Engineering

APIs and backend systems that keep products, partners and internal tools in sync.

REST, GraphQL, microservices, authentication, payments and integrations designed stable foundation for web and mobile products.

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Service overview

The interface people see only works if the backend is clear, secure and able to grow. APIs are how web apps, mobile apps, partners and internal tools share the same truth.

Vexora designs backend architecture, APIs and integrations for new products and for companies that need to connect existing systems. We treat authentication, data models and failure cases work, not leftovers.

Business challenges

Frontends waiting on unclear APIs

Mobile and web work stalls when contracts keep changing.

Point-to-point integrations

Every new tool adds another fragile connection.

Authentication afterthoughts

Access control becomes painful when it is added late.

Databases that cannot answer new questions

A rushed schema makes reporting and features expensive.

What we offer

REST APIs

Well-structured HTTP APIs with consistent errors and documentation.

GraphQL

Flexible queries when clients need to shape responses carefully.

Microservices

Service boundaries when the product and team are ready for them.

Backend Architecture

The overall shape of services, data and deployment.

Third-party API Integration

Payments, messaging, maps, CRMs and other external systems.

Payment APIs

Checkout, webhooks and reconciliation-friendly payment flows.

CRM Integration

Keep customer records aligned across product and sales tools.

ERP Integration

Connect operational software with orders, inventory or finance data.

Authentication

Sign-in, roles, tokens and session models that match the product.

Database Architecture

Schemas and access patterns that can support future features.

API Security

Auth, rate limits, validation and least-privilege access.

Key features

API contracts that frontend and mobile teams can depend on
Validation and error handling that make failures diagnosable
Auth and permissions designed with the data model
Idempotent payment and webhook handling where needed
Documentation and environments for other teams
Observability for latency and error rates

Development approach

01
Model the domain

We define the objects, events and permissions the product actually needs.
02
Design the contract

API shape is agreed before every client invents its own workaround.
03
Build and harden

Services are implemented with tests, auth and operational basics.
04
Integrate and observe

External systems and monitoring are added with failure in mind.

Benefits

Faster client development

Web and mobile teams can build against a stable contract.

Fewer fragile integrations

Systems connect through intentional APIs instead of ad hoc scripts.

Safer access

Authentication and authorization are part of the design.

A backend that can grow

New features do not require rewriting the data model every time.

Technology stack

Node.js Python Laravel .NET PostgreSQL Redis GraphQL Docker

Industries

SaaS · FinTech · Ecommerce · Healthcare · Logistics

Frequently asked questions

REST or GraphQL?

REST is a strong default for many products. GraphQL can help when clients need flexible queries. We choose based on the consumers of the API, not fashion.

Do you recommend microservices from day one?

Usually not. A well-structured backend can be split later. Microservices help when teams and domains are already pulling in different directions.

Can you integrate Salesforce, HubSpot or an ERP?

Yes. We integrate third-party platforms when the product needs them. We do not claim official partnerships unless they are separately verified.

Related services

Custom Software SaaS Enterprise Cybersecurity

Need a Technology Partner?

Talk to Vexora about your next software, AI or digital growth project.