Discipline Specification // BACKEND API DEVELOPMENT

Backend & API Development Services

A backend that works is not the same as a backend that scales, that's maintainable, or that your next engineer can understand. SynS Infrastructure builds backends with documented contracts (OpenAPI), typed end-to-end where possible, proper separation of concerns, and an authentication model that doesn't accumulate security debt. Whether you need a standalone API, a system integration, or a backend behind an existing frontend, the scope is defined in writing and the handover includes everything needed to continue without us.

DISCIPLINE BLUEPRINT TELEMETRY
100%
SOURCE CODE OWNERSHIP
SLA
24H DIRECT FOUNDER COMM
CORE STACK FOR THIS SERVICE
Node.js / ExpressPython / FastAPIPostgres / SupabaseZod / PydanticOpenAPI / Swagger
DELIVERY COMMITMENT

Continuous staging previews from Sprint 1 with clean architectural handovers.

Target Alignment

Who this is for

  • 01A team with a working frontend that outgrew its serverless functions and needs a real backend.
  • 02A technical founder who needs a documented, hosted API for a third party to integrate against.
  • 03An engineering team with a Python or Node service that needs a contractor to add endpoints, rework auth, or implement a new integration.
Deliverable Scope

What's included

  • ✓REST API design and implementation — Node.js/Express or Python/FastAPI depending on the project
  • ✓Authentication: JWT, session-based, or OAuth2 — including token refresh, revocation, and rotation
  • ✓OpenAPI/Swagger documentation generated from the code, hosted and accessible
  • ✓Database integration: Postgres (Supabase or managed), MongoDB, or MySQL
  • ✓Third-party API integrations — payment processors, communication APIs, data providers
  • ✓Rate limiting, input validation, and error handling that doesn't leak internals
  • ✓Deployment on Vercel, Railway, or Fly.io with environment-separated configs
Engineering Stack

Stack & tooling architecture for Backend & API Development Services.

Why we choose each component in the production runtime.

Node.js / Express

Pragmatic choice for JSON APIs, large ecosystem, easy to hand over

Python / FastAPI

When the project involves ML inference, data processing, or the team is already Python-native

Postgres / Supabase

Reliable, relational, and well-supported. Supabase for projects that also need auth or realtime.

Zod / Pydantic

Runtime validation that keeps the API honest — not just TypeScript types

OpenAPI / Swagger

Machine-readable contracts. Third parties can integrate without a phone call.

Engagement Protocol

How this discipline executes.

01

Scope & Architecture

Define exactly what gets built, what doesn't, and milestone criteria — in writing, before work starts.

02

Iterative Staging

Weekly written updates with staging deployments from the first sprint. Test features as they are built.

03

Handover & Ownership

100% repository, credentials, and documentation handed over. Retainers available for ongoing evolution.

Technical Clarifications

Questions & answers for this discipline.

Who owns the code when the project is done?+

You do. Full IP transfer is standard in every project agreement.

Will you sign an NDA?+

Yes. Mutual NDAs are standard.

Can you take over an existing backend that someone else built?+

Yes. We'll do a code review in the scoping phase and be honest about what's there — including any parts that would need to be rewritten to meet a reasonable quality bar.

Do you provide ongoing support after the project?+

A retainer can be scoped for ongoing support, monitoring response, and small feature work. The Maintenance & Support Retainers service covers this.

DISCIPLINE INTAKE

Ready to engineer your Backend & API Development Services?

Direct founder collaboration with milestone transparency. We reply within 1 business day.

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