Serverless architecture refactoring services

The specialists you’re looking for are typically cloud migration consultants, serverless architects, and cloud-native software engineering firms. They refactor applications running on dedicated servers into serverless architectures while preserving business logic, data integrity, security, and performance.

The right specialist depends on whether you want to modernize your existing application incrementally or redesign it around managed cloud services.

Who specializes in this refactoring?

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1. Serverless architecture consultants

Best for applications moving to AWS Lambda, Azure Functions, or Google Cloud Functions. They design event-driven systems, API integrations, database access, and deployment pipelines.

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2. Cloud application modernization firms

Best for existing applications that need code refactoring, dependency changes, database modernization, and migration with minimal downtime.

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3. Cloud-native DevOps engineering teams

Best when the migration also requires infrastructure as code, automated deployments, monitoring, security hardening, and cost optimization.

Firms worth evaluating

If you're looking for a firm to do the actual refactoring—not just move your server to a cloud VM—I'd start with these options.

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Alejandrix

(AWS-focused)

Specifically advertises serverless transformation, including readiness assessment, architecture design, application refactoring, testing, and deployment automation. A strong candidate if you're targeting AWS Lambda.

Website: Serverless Transformation ·Application Modernization

Source:www.alejandrix.com+1

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Modus Create

Offers cloud-native transformation, serverless adoption, microservices, and event-driven architecture. Worth considering for a more substantial application redesign.

Website:Cloud Modernization

Source:www.moduscreate.com

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Trianz

Offers application assessments and serverless modernization across AWS, Azure, and Google Cloud. More relevant for larger applications or portfolios with complex dependencies.

Website:Application Modernization

Source:www.trianz.com

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Devsu

Orlando-based software modernization firm advertising legacy-system transformation, monolith decomposition, database migration, and cloud modernization. Ask for specific examples of serverless projects before shortlisting.

Address: 618 E South St Ste 500, Orlando, FL 32801, United States

Website:Devsu

These are candidates based on their advertised capabilities, not independently verified rankings of completed serverless migrations.

What to look for in a proposal

Ask prospective firms to provide:

• A refactoring assessment: Which components should become functions, managed services, or remain as conventional services?
• A migration plan: Phased rollout, data migration, testing, rollback, and downtime controls.
• A cost comparison: Current dedicated-server costs versus projected serverless costs, including database, networking, logging, and API charges.
• Relevant case studies: An application similar to yours that they have actually refactored and put into production.

One important caveat: serverless isn't automatically cheaper or better. Long-running processes, persistent connections, and applications with consistently high utilization may need a hybrid design.

Let me narrow this down for your project

The most useful starting point is: What technology is your existing application built with, and which cloud platform are you targeting?

For example, PHP/MySQL to AWS Lambda, .NET to Azure Functions, or Node.js to Google Cloud. With that information, I can identify firms whose experience is a closer match to your actual refactoring needs.

If you're moving from a dedicated-server environment to a serverless architecture, I'd prioritize firms that specialize in application refactoring and cloud-native modernization, rather than providers that primarily migrate servers to the cloud.

The key distinction is that you want a partner who can redesign your application to use managed services, event-driven processing, and automatically scaling compute—not simply move your existing server workloads onto virtual machines.

Here are the firms I'd put on an initial shortlist, based on their published service offerings and documented modernization experience.

Recommended firms to evaluate

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1. Serverless Guru

(Best specialist fit)

Best for: AWS serverless migrations and hands-on refactoring.

Serverless Guru explicitly focuses on serverless application development, migration of legacy systems, and optimization of event-driven workloads. It is a strong candidate if you want a specialist to work alongside your existing engineering team.

Source: Serverless Guru services.

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2. 27Global

Best for: Refactoring monolithic applications into cloud-native services.

Its application modernization practice specifically lists serverless refactoring, breaking monoliths into microservices, database modernization, and CI/CD implementation. Worth evaluating if your dedicated-server setup hosts a tightly coupled application that needs more than an infrastructure change.

Source: 27Global application modernization.

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3. Mphasis

Best for: Larger, complex enterprise applications.

AWS has published a case study documenting Mphasis re-architecting a legacy .NET application into a serverless, microservices-based architecture using AWS Lambda. Consider it if the transition involves substantial legacy code, identity integration, or enterprise system dependencies.

Source: AWS case study.

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4. CirrusHQ

Best for: AWS-focused cloud architecture and managed-service adoption.

CirrusHQ publishes experience with AWS migrations and serverless API implementations. It is worth considering if you want an AWS-centered partner that can help with architecture, implementation, and the wider cloud operating model.

Source: CIPFA AWS migration case study.

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5. Disruption Consulting

Best for: Deep architectural refactoring rather than lift-and-shift migration.

Its published practice emphasizes decomposing applications into independently scalable services, adopting managed data services, and moving toward consumption-based compute. This is especially relevant if your goal is to change how the software is designed and operated, not just where it runs.

Source: Application refactoring services.

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6. ZirconTech

Best for: A defined AWS serverless transformation engagement.

Its AWS Marketplace offering describes a structured service covering architecture assessment, serverless design, implementation, and optimization using technologies such as Lambda, API Gateway, and DynamoDB. This could be a practical option if you prefer a clearly scoped project.

Source: AWS Marketplace service listing.

These are candidates to interview, not independently audited rankings. Their published capabilities establish relevance, but you'll want to validate recent references, the actual engineers assigned to your project, and experience with your specific application stack.

How I'd narrow the shortlist

I'd start with three firms, depending on your situation:

Serverless Guru also publishes a case study on migrating a system handling three billion requests per month, which makes it worth investigating if you operate at significant scale.www.sls.guru+2

What to require from any prospective partner

Before signing a contract, ask each firm to provide:

• A reference architecture: Show how they would replace your current dedicated-server components with managed compute, databases, queues, and storage.
• A phased refactoring plan: Identify which components can be migrated incrementally, which need rewriting, and which should remain on servers or containers.
• A cost comparison: Compare current dedicated-server costs with projected serverless costs at normal, peak, and low traffic volumes.
• A migration and rollback strategy: Explain how they'll protect data, minimize downtime, and recover if a production cutover fails.
• Production references: Request two comparable projects and speak directly with the clients if possible.

One important caveat: serverless is not automatically cheaper or better for every workload. Persistent processes, consistently high compute utilization, and latency-sensitive applications may be better suited to containers or a hybrid architecture.

One question to help me refine the recommendations

What does your current dedicated-server setup run, and which cloud platform are you considering?

1. What are you running?

Web application or API backend

SaaS product or multi-tenant platform

Game server or real-time application

Data processing or background jobs

Other or mixed workloads

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2. Preferred cloud platform

AWS

Microsoft Azure

Google Cloud

Open to any platform

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3. Project scale

Small: one or two servers, small application

Mid-sized: multiple services or servers

Enterprise: complex, high-availability system

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4. Main objective

Reduce infrastructure costs

Improve scalability and reliability

Modernize legacy code

Reduce operations and maintenance

[Refine recommendations]

With those details, I can narrow the list to firms whose experience is most relevant to your architecture rather than just general cloud migration providers.