Monolith to Microservices MigrationBreak up the monolith only where it pays, without stopping the business.
We help teams move from a monolithic application to modular services using the strangler-fig pattern, with clear domains, APIs, data separation and DevOps, or recommend a modular monolith if that fits better.
- Strangler-fig approach
- Domain-driven
- No big-bang rewrite
- Modernisation Assessment2–3 weeks · Fixed price
- Phased Service Extraction3–12 months · Fixed price per phase
How do you migrate a monolith to microservices?
A safe migration uses the strangler-fig pattern: identify business domains, put an API layer in front of the monolith, then extract one domain at a time into a separate service with its own data, routing traffic gradually. Stack18 maps domains, picks the parts where separation brings real benefits, builds deployment pipelines and observability, and often recommends a modular monolith where microservices would add cost without benefit.
- microservices migration
- strangler fig pattern
- monolith decomposition
- microservices architecture consulting
- modular monolith
Last reviewed 11 November 2026 by the Stack18 delivery team in Jaipur.Security & AI governancePricing
| What it covers | Architecture assessment; Domain mapping; API layer; Service extraction; Data separation; Platform and observability. |
|---|---|
| Typical first step | Modernisation Assessment: 2–3 weeks; fixed price. |
| Main engagement | Phased Service Extraction: 3–12 months; fixed price per phase. |
| Measured by | Deployment frequency; Change failure rate; Lead time for changes; Incident impact radius. Each against an agreed baseline. |
| Governance | Human approval at 5 governance gates before anything reaches production. NDA available on request. |
| Delivery team | Based in Jaipur, India. A senior specialist replies within one business day. |
You need this when…
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Monolith to Microservices Migration, end to end.
The features and building blocks of a Monolith to Microservices Migration engagement. Each is delivered by the same team on the Agentic SDLC, with your approval at every critical step.
Architecture assessment
Code, data and team structure reviewed.
- Coupling analysis
- Hotspot mapping
- Team topology
Domain mapping
Business domains and boundaries defined.
- Domain-driven design
- Bounded contexts
- Service candidates
API layer
An API gateway in front of the monolith.
- API gateway
- Routing rules
- Versioning
Service extraction
Domains moved out one at a time.
- Strangler-fig steps
- Feature flags
- Traffic shifting
Data separation
Databases split safely with sync where needed.
- Data ownership
- Event streaming
- Consistency patterns
Platform and observability
Pipelines, containers and monitoring for each service.
- CI/CD per service
- Kubernetes or serverless
- Tracing and logs
A typical engagement, step by step.
Senior people lead every phase. Specialised AI agents on the Agentic SDLC handle the repetitive work, and nothing ships without your approval.
Discover
We map today’s process, systems and data for architecture assessment, domain mapping and API layer, talk to the people who run it and agree the baseline for deployment frequency and change failure rate, so progress is measured from week one.
Design
We design the flows, roles, approvals and integrations for architecture assessment and domain mapping, and review a clickable prototype or technical design with the people who will use it before anything is built.
Build
We build in weekly demos, starting with architecture assessment, then domain mapping and API layer. Each release is tested on your own data and passes a human approval gate before the next begins.
Launch
We migrate data, train your team and support go-live. After 30 days we review deployment frequency and change failure rate against the baseline and agree what to extend next.
How much does Monolith to Microservices Migration cost in India?
Most Monolith to Microservices Migration projects start with a Modernisation Assessment (2–3 weeks, fixed price), which fixes the scope, team and price before you commit. Phased Service Extraction takes 3–12 months at a fixed price per phase. Prices exclude GST. Cloud hosting and third-party usage, such as messaging, payment or AI model charges, are paid at cost.
Modernisation Assessment
Teams deciding how to modernise a legacy system.
- Duration
- 2–3 weeks
- Pricing
- Fixed price
- Code and data review
- Options and costs
- Migration roadmap
Phased Service Extraction
Product teams with a growing monolith.
- Duration
- 3–12 months
- Pricing
- Fixed price per phase
- Domain map
- Extracted services
- Platform setup
What drives the price
- Number of modules, workflows and user roles
- Integrations with your ERP, CRM, payments, GST or messaging tools
- Volume and quality of data to migrate
- Compliance, security and audit requirements
- Mobile apps, offline use or multiple languages
Always included
- Fixed scope and price before build starts
- Weekly working demos and human approval gates
- Training, documentation and 30 days of hypercare
- Your code, data and IP, owned by you
See Stack18 pricing or compare fixed price and time and materials.
What we have shipped, and what a typical engagement looks like.
Delivered projects link to the full case study. Illustrative scenarios describe typical engagements and are not named client results.
Logistics SaaS
- Challenge
- A Rails monolith where billing changes broke tracking.
- What we do
- Domain mapping, an API gateway and extraction of billing and notifications into separate services with event streaming.
- We would measure
- Deployment frequency, change failure rate, lead time for changes, against a baseline agreed in week one.
8 months
Edtech platform
- Challenge
- Exam-day traffic overloaded the whole application.
- What we do
- Extraction of the assessment engine into a separately scaled service, with the rest kept as a modular monolith.
- We would measure
- Deployment frequency, change failure rate, lead time for changes, against a baseline agreed in week one.
5 months
Ethnic wear D2C, Jaipur
- Challenge
- A ₹100+ crore brand needed website, app and back office to share one catalogue and one record of stock and orders.
- What we do
- Nine specialists built website, mobile app and ERP on one connected foundation in two-week sprints.
3 months
Read the case study →We agree targets before we start.
Free architecture review
Walk us through your system. We tell you whether microservices make sense.
- Architecture view
- Options
- Phased plan
Monolith to Microservices Migration questions.
Cost, timelines, integrations and ownership. If your question is not here, ask a senior specialist on a free 30-minute call.
Ask us anythingHow much does Monolith to Microservices Migration cost in India?
Most Monolith to Microservices Migration projects start with a Modernisation Assessment (2–3 weeks, fixed price), which fixes the scope, team and price before you commit. Phased Service Extraction takes 3–12 months at a fixed price per phase. Prices exclude GST. Cloud hosting and third-party usage, such as messaging, payment or AI model charges, are paid at cost.
Do we really need microservices?
Not always. Many teams benefit more from a well-structured modular monolith. We recommend what fits your scale and team size.
Can we keep shipping features during migration?
Yes. The strangler-fig approach lets the business keep running while parts move gradually.
What about the database?
Data is separated per service step by step, using events or synchronisation where services need shared information.
Which technologies do you use?
Kubernetes, containers, serverless, API gateways, Kafka or cloud messaging, chosen for your cloud and team skills.
Do you provide Monolith to Microservices Migration across India?
Yes. Stack18 is headquartered in Jaipur, Rajasthan, and delivers Monolith to Microservices Migration for businesses across India, including Delhi NCR, Mumbai, Bengaluru, Pune, Hyderabad and Ahmedabad. Work runs remotely with weekly demos, and on-site workshops are arranged for key milestones.
Let's scope your Monolith to Microservices Migration project.
Tell us where you are and where you want to be. A senior specialist will reply within one business day with next steps.
- Free 30-minute consultation
- Indicative estimate after the call
- NDA available on request