Backend & Integrations
APIs, authentication, payments and the integrations your business runs on.
We design and build the backend systems behind products and operations: APIs, authentication and authorization, payment flows, data pipelines and integrations with the third-party and enterprise systems you depend on.
The problem
Integrations are where systems quietly fail: webhooks that drop events, retries that double-charge, permissions enforced only in the frontend, and data that drifts between systems. These failures are rarely visible until they're expensive.
How we approach it
We treat every integration as a contract: explicit schemas, idempotent operations, retries with backoff, reconciliation jobs and alerting when things diverge. Authorization is enforced on the server, every time, and sensitive operations leave an audit trail.
Capabilities
What we build
- REST and GraphQL APIs
- Authentication and authorization
- Payment systems
- Third-party integrations
- Data pipelines
- CRM / ERP and enterprise systems
Deliverables
What you receive
- API design and documentation
- Auth and permissions model
- Idempotent payment and webhook handling
- Integration monitoring and reconciliation
- Audit logging for sensitive operations
- Load and failure-mode testing
Technology
Tools we use for this work.
Chosen per project for fit, maturity and your team's ability to maintain it — not novelty.
Backend
- Node.js
- Python
- FastAPI
- NestJS
- GraphQL
- REST APIs
Data
- PostgreSQL
- Redis
Integrations
- Stripe
- OAuth 2.0 / OIDC
- Webhooks
Related work
Backend & Integrations in practice.
E-commerce
TileMoments: phone photos to printed wall tiles, designed in the browser
An e-commerce product that turns customers' own photos into printed photo tiles and framed wall art — with a guided design studio, saved layouts, accounts, payments and fulfilment through print partners.
- React
- Next.js
- Responsive design
Travel
Skylova Travel: flight booking on top of travel-industry APIs
A travel-booking platform for a US online travel agency — flight search for one-way, round-trip and multi-city trips, booking workflows and payment flows, integrated with external travel APIs over XML/SOAP.
- Next.js
- NestJS
- PostgreSQL
Questions
Before you ask.
How do you price projects?
Fixed-scope projects are priced per milestone after a short discovery phase. Dedicated teams are billed monthly. Either way, you receive a written proposal with scope, assumptions, milestones and pricing before anything is committed.
Who will actually work on my project?
A team led by a technical lead, with a project manager as your main point of contact. Every team member is visible in your client portal.
Who owns the code and infrastructure?
You do. Source code, infrastructure and documentation live in your own accounts from day one, so there is no lock-in.
Can you take over an existing codebase?
Yes. We start with a short technical assessment — architecture, code quality, security, test coverage and deployment — and give you a written report with a prioritised plan before proposing any work.
Start a project
Planning a project?
Three short questions about your project. We reply within one business day — with questions that show we read it.