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APIs that partners
and teams can rely on

We design APIs from a written contract, put one secure gateway in front of them and make webhooks and events deliver reliably. Your own teams and partners get clear docs and a sandbox, so they connect faster and run into fewer failures.

To kick off a scoped project
1–2 weeks
Daily overlap with your team
4+ hours
Monthly per squad, no hourly bills
Flat fee
Your code, designs and IP
100%

What's included

What we
build for you

6 capabilities, delivered by one squad. Use what you need now and add more as you grow.

  • 01

    Contract-first API design

    Each API starts as an OpenAPI contract with examples, checked automatically so changes can't break existing users.

    • OpenAPI specs with examples
    • Compatibility gates in CI
  • 02

    API gateway and routing

    One entry point that handles rate limits, sign-in checks, caching and traffic shaping.

    • Quotas and policies
    • Traffic shaping
  • 03

    Security and identity

    OAuth2 and OIDC, mTLS, signed webhooks and scopes, with clear records of who called what.

    • OIDC scopes
    • Signed webhooks
  • 04

    Event-driven integrations

    Webhooks, queues and event streams that retry failed deliveries and don't create duplicates when a message arrives twice.

    • Retries and dead-letter queues
    • Idempotency keys
  • 05

    Developer experience

    A developer portal, SDKs, docs and a sandbox, so partners can test and go live without waiting on your team.

    • SDKs and samples
    • Partner sandbox
  • 06

    Monitoring and SLOs

    Tracing, logs, alerts and reliability targets for the integrations your business depends on.

    • Dashboards
    • SLO error budgets

Our approach

What usually goes wrong,
and what we do instead

  1. The usual way

    APIs ship without a written contract, so nobody knows the exact behaviour and a small change can break a partner.

    How we do it

    Every API gets an OpenAPI contract, automatic compatibility checks and a clear versioning policy, so changes roll out without surprises.

  2. The usual way

    Each service handles security its own way, leaving gaps in access rules and in the audit trail.

    How we do it

    One gateway enforces OAuth2, mTLS, rate limits, quotas and firewall rules, so every API follows the same rules.

  3. The usual way

    When an integration fails, nobody can see where or why.

    How we do it

    Request tracing, reliability targets (SLOs), retries and circuit breakers, with dashboards that show where a failure started.

Architecture

How it's
put together

Each layer has a clear job, so the system is easier to secure, test and extend.

  1. Layer 01

    Consumers

    Your own apps, partner systems and services, all connecting through the same documented contracts.

    • SDKs
    • Developer portal
    • Sandbox
  2. Layer 02

    Gateway layer

    One front door for every API: sign-in checks, routing, quotas, caching and security rules.

    • OAuth2
    • Rate limits
    • WAF
  3. Layer 03

    Integration layer

    Events, webhooks and adapters that retry failures, skip duplicates and hold failed messages for replay.

    • Retries
    • Dead-letter queues
    • Replay
  4. Layer 04

    Monitoring and governance

    Tracing, reliability targets, audit logs and a planned path for retiring old API versions.

    • Tracing
    • SLOs
    • Audit logs

How we deliver

From first review
to live in production

4 phases, each ending with an output you can review.

  1. Step 1: Platform audit

    We map who uses your APIs, how they sign in and what reliability they need, and check the state of your current contracts.

    Output: API platform blueprint

  2. Step 2: Contracts and developer portal

    We write OpenAPI contracts, docs, SDKs and a sandbox, with automatic compatibility checks on every change.

    Output: Contract-first baseline

  3. Step 3: Gateway and integration layer

    We set up the gateway rules, retries and dead-letter queues for failed messages, plus runbooks for the support team.

    Output: Production integration layer

  4. Step 4: Observe, evolve and scale

    We add tracing, dashboards and a plan for retiring old versions, then onboard more partners one group at a time.

    Output: A platform ready for more partners

Your team

Who works
on it

Specialists join your squad for this work, alongside a delivery lead who keeps you updated.

  • API platform architect

    Designs the contracts, versioning strategy, gateway layout and developer experience.

    • Contracts
    • Versioning
    • Developer experience
  • Integration engineer

    Builds webhook and event integrations that retry, skip duplicates and keep working when the other system is slow.

    • Events
    • Retries
    • Idempotency
  • Security and IAM lead

    Sets up sign-in and access rules (OAuth2, OIDC, mTLS, scopes and quotas) and records who called what.

    • OIDC
    • mTLS
    • Policies
  • API operations lead

    Runs monitoring and tracing, owns the reliability targets and leads the response when an integration fails.

    • Tracing
    • SLOs
    • Runbooks

Trust and control

Safe by design,
not by policy alone

  • Compatibility and deprecation gates

    Automatic checks block any change that would break an existing user, and old versions retire on a published schedule.

  • Policy enforcement by default

    Sign-in, encrypted service-to-service traffic and usage quotas apply to every API through one gateway.

  • Activity records and monitoring

    Tracing, logs and reliability targets show how each integration performs and who called what.

You keep full ownership of the code, configuration and documentation we create, with no vendor lock-in.

Tools and standards

We pick what fits your product and team, not the other way round.

Contracts and APIs
  • OpenAPI
  • SemVer
  • Webhooks
Security
  • OAuth2
  • OIDC
  • mTLS
  • WAF
Reliability
  • Distributed tracing
  • SLOs
  • Circuit breakers
  • Dead-letter queues

Results

Related
case studies

More case studies
  • E-commerceSaaS & Software

    E-commerce integrations: One backend for orders, stock and payments

    We built a backend and API layer for a growing commerce business. Orders, inventory, payments, fulfilment and customer updates now move reliably between the tools the company already used.

    Connected workflow
    One
    Day-to-day visibility
    Live
  • HospitalitySaaS & Software

    Hotel system integrations: 85% faster API responses

    We wrapped a hotel group's ageing PMS in a modern API layer with caching and live sync, so new guest features no longer need risky changes to the core system. It runs at 99.99% availability, with 45ms API responses.

    System availability
    99.99%
    API response time
    45ms
  • FinTechSaaS & Software

    Embedded B2B lending: Invoice financing inside a supply chain platform

    We added invoice financing to a supply chain SaaS platform, so suppliers get credit decisions and payouts inside their invoice workflow. Supplier retention rose 24%, and decisions come back in under 850ms.

    Higher supplier retention
    24%
    Credit decision time
    <850ms
  • FinTechSaaS & Software

    Algorithmic trading: Automated strategies, with funds kept at the broker

    We built an algorithmic trading platform that connects securely to the user's own brokerage account and runs automated strategies. Paper trading lets users test a strategy first, and a live dashboard shows every trade.

    Non-custodial design
    100%
    Trade execution
    < 45ms

FAQ

Straight
answers

Have a different question? Ask it on a 30-minute call.

Book a call

Contract-first API development means writing the API's contract, an OpenAPI file with its endpoints, fields and examples, before writing any code. Your team and partners agree on it first, and automated checks in the build pipeline then compare every change against it. That stops a release from quietly breaking a partner's integration.

Planning something like this?

Tell us what you need. We'll suggest the right team and a rough quote range, and an NDA is available before you share anything sensitive.