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Services/System Integration & API Development
Service 11 · System Integration & API Development

Systems wired together properly, not duct-taped through a webhook.

Identity, payments, and ESB/iPaaS integration between the core systems your business actually runs on — public and private, designed to survive the next system you add, not just the current two. Wired for growing businesses and enterprises across Nepal.

What the practice covers

Six capabilities, one accountable team

01

Identity & SSO

OAuth2, SAML, and OIDC wired between systems that were never designed to trust each other.

02

Payments integration

Gateway and reconciliation flows built to survive edge cases, not just the happy path.

03

ESB & iPaaS design

Event-driven integration patterns that scale past the third or fourth system you connect.

04

API design & gateways

Contracts versioned and documented so a breaking change doesn't break every consumer.

05

Legacy system bridging

Modern APIs fronting systems that were never built to expose one.

06

Monitoring & reconciliation

Every integration point observable, with automated reconciliation against source of truth.

How an engagement runs

Four phases, each with a named deliverable

Weeks 1–2

Map

Every system, data contract, and failure mode mapped before a single integration ships.

Weeks 3–5

Design

Integration patterns and API contracts agreed with every consuming team.

Weeks 6–9

Build

Integrations shipped incrementally, each one tested against real production data.

Ongoing

Operate

Reconciliation monitoring and incident response under an agreed SLA.

reconcile.log
# nightly reconciliation · payments-corerecords_compared = 48213mismatches       = 0gateway_status   = "healthy"webhook_lag_p95  = 340msstatus = "reconciled"
Reconciliation passed — 0 discrepancies
Why contracts, not webhooks

Every integration point observable and versioned

  • Versioned API contracts — a breaking change is a decision, not an accident.
  • Reconciled, not assumed — every integration checked against source of truth on a schedule.
  • Designed for the fourth system too — not just the two you're connecting today.
The record

Built into every engagement

6
Capabilities covered in every engagement
2 wk
Time to a scoped integration map
100%
API contracts versioned and documented
0
Silent reconciliation failures, by design
Selected work

Integration engagements on the record

2025

Payments processor — multi-gateway reconciliation

Automated nightly reconciliation across 4 payment gateways, zero manual review.

Common questions

Questions we get about systems integration

What kinds of systems do you integrate?

Identity providers, payment gateways, ESB/iPaaS platforms, and legacy systems that were never built to expose an API — public and private-sector, wired together with versioned contracts rather than one-off webhooks.

How do you prevent a breaking change from taking down every consumer?

API contracts are versioned and documented, so a breaking change is a deliberate, communicated decision agreed with every consuming team — not an accident discovered in production.

How do you know an integration is actually working correctly?

Every integration point is observable, with automated reconciliation checked against source of truth on a schedule — silent failures are the thing this process is specifically designed to catch.

Can you connect a system that was never designed to integrate with anything?

Yes — legacy system bridging is a core part of the practice: modern APIs are built to front systems that predate any API, without modifying the legacy system's internals directly.

Does the integration scale if we add more systems later?

Patterns are designed for the fourth system you connect, not just the two in front of you today — event-driven integration scales past the point where point-to-point webhooks start breaking down.

Wire your systems together properly, once

A two-week mapping sprint scopes every integration before you commit to anything.

Start the mapping sprint