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Break up the monolith
without breaking production

We help you move from one large, risky release to services each team can deploy on its own. We map where to split, move traffic across a little at a time using the strangler pattern, and send every change through pipelines with security checks.

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

    Service decomposition

    Find the natural split points in the code, define service boundaries and extract each service with a clear contract.

    • DDD boundaries
    • Contract-first APIs
  • 02

    Strangler routing

    Route traffic gradually from the monolith to new services, with a safe way back at every step.

    • Feature flags
    • Canary releases and rollbacks
  • 03

    Data decoupling

    Split the shared database so each service owns its data, using CDC and the outbox pattern to keep data in step during the move.

    • CDC and outbox
    • Schema independence
  • 04

    Event-driven integration

    Replace direct calls between services with events and queues, so one slow service doesn't hold up the others.

    • Idempotency
    • Saga patterns
  • 05

    DevSecOps safeguards

    Pipelines with security scans, policy checks and a record of every release, so security doesn't slip during the move.

    • SBOMs and scans
    • Policy as code
  • 06

    Monitoring baseline

    Logs, metrics, traces and SLOs measured before and after each cut-over, so you can see whether it worked.

    • Tracing
    • SLO dashboards

Our approach

What usually goes wrong,
and what we do instead

  1. The usual way

    So-called microservices that still share database tables and deploy together.

    How we do it

    Clear service boundaries and API contracts, with each service owning its own database schema.

  2. The usual way

    All traffic moves to the new system in one go, so a single fault can take everything down.

    How we do it

    Strangler routing moves traffic a slice at a time, with monitoring and a way back at every step.

  3. The usual way

    Releases depend on manual steps, with no security checks or record of what was shipped.

    How we do it

    Every release goes through pipelines with policy gates, scans, SBOMs and activity records.

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

    Boundaries and contracts

    Service boundaries and API contracts that stop you ending up with a distributed monolith: many services that still change and deploy together.

    • DDD
    • Bounded contexts
    • Contract-first APIs
  2. Layer 02

    Routing and cut-overs

    Strangler routing, feature flags and canary releases move traffic safely while production keeps running.

    • Traffic splits
    • Feature flags
    • Canary releases
    • Rollback paths
  3. Layer 03

    Data decoupling

    A separate schema per service, with CDC, the outbox pattern and anti-corruption layers keeping old and new data models apart.

    • CDC
    • Outbox
    • Anti-corruption layer
    • Schema independence
  4. Layer 04

    DevSecOps safeguards

    Automated policy checks, secure delivery and activity records, so modernisation doesn't weaken security.

    • SBOM
    • Dependency scans
    • Policy gates
    • Approvals

How we deliver

From first review
to live in production

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

  1. Step 1: Discovery and boundary mapping

    We map the business areas in your code, the parts most tangled together and every integration point, then agree how to measure success.

    Output: Decoupling blueprint

  2. Step 2: Routing and cut-over design

    We design strangler routing, feature flags, canaries and rollback plans before any service is extracted.

    Output: Safe migration plan

  3. Step 3: Service extraction and data patterns

    We extract the first services, move their data out with CDC and the outbox pattern, and give each one its own schema.

    Output: First independent services

  4. Step 4: Secure, monitor and repeat

    We add policy gates, SBOMs, SLOs and monitoring, then repeat the same steps for the rest of the system.

    Output: Repeatable modernisation process

Your team

Who works
on it

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

  • Domain architect

    Maps service boundaries, contracts and extraction order, so each step removes complexity instead of moving it around.

    • DDD
    • Contracts
    • Seams
  • Cut-over engineer

    Sets up strangler routing, feature flags, canaries and rollback for safe production moves.

    • Feature flags
    • Canary releases
    • Rollback
  • Data migration lead

    Designs CDC and outbox patterns, schema boundaries and a safe order for moving data.

    • CDC
    • Outbox
    • Schemas
  • DevSecOps lead

    Builds policy gates, SBOMs, scans and approvals into pipelines, so security improves as you modernise.

    • SBOM
    • Policy
    • Audit

Trust and control

Safe by design,
not by policy alone

  • Policy gates on every release

    Scans, SBOMs and approvals run in the pipeline before anything reaches production.

  • Rollback paths

    Routing, feature flags and canaries are designed with a way back before extraction starts.

  • Measurable cut-overs

    Monitoring baselines and SLOs make every traffic shift measurable and reversible.

  • Activity records

    Approvals and release history are recorded for every modernisation release.

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.

Architecture patterns
  • Domain-driven design
  • Strangler pattern
  • Anti-corruption layer
  • Saga pattern
Data and integration
  • CDC
  • Transactional outbox
  • Message queues
  • Contract-first APIs
Release safety
  • Feature flags
  • Canary releases
  • SBOMs
  • Policy as code
  • Distributed tracing

Results

Related
case studies

More case studies
  • LogisticsSaaS & Software

    Logistics platform: One large application split into focused services

    We helped a logistics company split a growing all-in-one application into separate services for orders, dispatch, tracking, notifications and billing. Each area can now improve and scale on its own.

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

    Subscription billing: Fragile billing code rebuilt as reliable services

    We redesigned a SaaS company's subscription and billing workflows as separate services for plans, payments, invoices, entitlements and notifications. Processes that affect revenue are now easier to manage and to recover when something fails.

    Connected workflow
    One
    Day-to-day visibility
    Live
  • FinTechCloud & DevOps

    Core banking migration: From mainframe to AWS with zero downtime

    We moved a global core banking system from an ageing mainframe to AWS one function at a time, keeping both ledgers in sync throughout. Operating costs fell 60%, releases became 5x faster, and there was zero service downtime.

    Lower operating costs
    60%
    Faster releases
    5x
  • HospitalityCloud & DevOps

    Hotel network security: Suspicious devices isolated automatically

    We built AI network security for a global resort chain. It learns how devices normally behave on guest Wi-Fi and isolates suspicious ones automatically. It neutralised 99.9% of threats and detected them 2.5x faster.

    Threats neutralised
    99.9%
    Faster detection
    2.5x

FAQ

Straight
answers

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

Book a call

It depends on the size of the monolith, how tangled the code and database are, and how many services you plan to extract. Because traffic moves gradually, the first services can go live while the rest of the system keeps running. A scoped project can kick off in 1–2 weeks, starting with a boundary review.

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.