gateway.build.ts 01exportfunctiondeploy() { 02 build.test() 03 ci.run('pass') 04 return shipped 05} BUILD PASSED · v2.14.0 SPRINT 01 RELEASE
API economy & microservices engineering · serving businesses worldwide since 2009

API-first platforms and microservices architecture that let your systems talk to each other.

Need an API strategy, microservices migration or partner integrations? Ask Milo - he’ll help you with your queries.

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APIs and microservices shipped into production since 2009
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Average reduction in integration turnaround time after migration
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Contracted uptime SLA on managed API platforms
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Partner and third-party integrations built for client platforms
Monolith vs. services vs. status quo

When API economy & microservices become the better choice

Every new feature means touching the same fragile codebase

Your monolith has grown past the point where one team can safely change it without breaking something else.

Partners and internal teams keep asking for data you can’t safely expose

Without a proper API layer, every integration request turns into a one-off script or a security risk.

Scaling means scaling everything, even the parts that don’t need it

A single deployable unit forces you to scale the whole application, not just the busy parts.

Releases are slow because every team is blocked on every other team

Without service boundaries, one team’s release schedule becomes everyone’s release schedule.

SERVICE MESH API GATEWAY AUTH EVENT BUS ORDERS SVC BILLING SVC DECOUPLED, NOT DISCONNECTED Service-oriented · Contract-driven · Independently deployable
API economy & microservices services from strategy to support

One team for API strategy, service design, engineering, gateway management and monitoring.

Our API economy and microservices services cover the full lifecycle: API strategy and audit, service boundary design, API and microservices development, gateway and security configuration, monitoring and post-launch support. One Milleniance team remains accountable from the first architecture workshop through production.

Discipline 01

API strategy & platform audit

Auditing existing systems, defining API strategy, identifying service boundaries and prioritising a migration roadmap before implementation begins.
API & systems auditDomain & service boundary mappingAPI governance & versioning strategyMigration roadmap & risk assessment

Our audit work can include monolith decomposition analysis, latency and dependency mapping, and a phased plan that sequences which services to extract first for the fastest return.

Discipline 02

API design & developer experience

REST, GraphQL and event-driven API design built around clear contracts, versioning and documentation so internal and partner teams can integrate quickly and safely.
REST & GraphQL API designOpenAPI / schema documentationDeveloper portals & sandbox environmentsVersioning & backward-compatibility strategy

Well-documented, contract-first APIs reduce integration time for partners and internal teams and make breaking changes visible before they ship.

Discipline 03

Microservices engineering & event-driven architecture

Building and extracting microservices, message queues and event streams that let teams ship independently without breaking the rest of the platform.
Microservices development (Node.js, Java, Python, Go)Event-driven architecture (Kafka, RabbitMQ, SQS)Service mesh & inter-service communicationDatabase-per-service & data consistency patterns

Engineering includes contract testing, circuit breakers and observability from the first service, so failures stay isolated instead of cascading.

Discipline 04

API gateway, security & platform operations

Gateway configuration, authentication, rate limiting, monitoring and incident response keep APIs and microservices reliable and secure once real traffic hits them.
API gateway configuration (Kong, Apigee, AWS API Gateway)OAuth2 / JWT / API key securityRate limiting & traffic managementDistributed tracing & incident response

Gateway and operations work covers throttling, key rotation, anomaly detection and a defined on-call process so an API outage never becomes a surprise.

API and microservices technologies and technology stack

We choose the API and integration stack around your existing systems, partners and traffic patterns.

Our stack includes modern gateway, messaging, container and observability technologies. Where your business already has a working stack, we work within it by default and recommend migration only when the benefits are clear.

Node.jsJava / Spring BootPython / FastAPIGoGraphQLREST APIsgRPCKafkaRabbitMQAWS SQS / SNSKongApigeeAWS API GatewayDockerKubernetesIstioPostgreSQLMongoDBRedisOpenTelemetryDatadogTerraform
API & microservices development process

A defined process from system audit to service extraction, launch and ongoing platform operations.

01

Discovery, systems audit & service boundaries

We map existing systems, integration points, traffic and dependencies before defining which services to build, extract or expose first.

02

Senior API & platform engineering team assignment

A named technical lead and API/platform engineers stay accountable throughout, from architecture through gateway operations.

03

API & microservices development, integration & launch

Design, engineering, gateway configuration and QA work against one delivery roadmap, released service by service.

04

Post-launch monitoring, scaling & optimisation

After launch, we support monitoring, scaling policies, incident response, versioning and new service development based on real traffic.

Selected work

A handful of the platforms and campaigns we've shipped recently.

View full portfolio →
Frequently asked

What our clients usually ask before the first call.

The API economy refers to how businesses create value by exposing and consuming APIs to connect their own systems, partners and third-party platforms. It matters because the businesses that can safely open up data and workflows through APIs can move faster, integrate with partners more easily and build new revenue streams.

Microservices are worth it when a single codebase has grown too large for one team to change safely, when different parts of the system need to scale independently, or when release schedules are blocked because unrelated teams share the same deployable unit. Microservices add operational complexity, so it is a deliberate trade rather than a default.

Usually, yes, on both counts - more moving parts, more monitoring and more coordination between services. We aim to justify that added complexity with monitoring, contract testing and CI/CD in place from the first service, and by extracting services in the order that gives the fastest return, not decomposing everything at once.

Yes. We commonly build an API layer in front of legacy systems so newer applications, partners and mobile apps can integrate without waiting for a full legacy replacement.

Yes. Gateway configuration, authentication, rate limiting, key management and partner onboarding workflows are part of our API and microservices services - see “API gateway, security & platform operations” above.
From the practice

API & microservices insights: architecture, contracts, gateways and platform operations.

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Let's see if we're the right fit

Thirty minutes with a senior integration architect, before either of us commits to anything.

No sales deck, no discovery call with someone who hands you off afterwards. Scoped around your actual systems, partners and traffic. We respond within one business day.

Talk to an Integration Architect →
Talk to an Integration Architect →