Emerline’s clients - SAP
Emerline’s clients - FUCHS
Emerline’s clients - Espresa
Emerline’s clients - TrueLedger
Emerline’s clients - CPG Data
Emerline’s clients - Praxie
Emerline’s clients - Beacon Council
Emerline’s clients - Yarowa
Emerline’s clients - GoDog
Emerline’s clients - Fast Formulator
Emerline’s clients - 8 sports
Emerline’s clients - Driv
Emerline’s clients - Hello Ralphie
Emerline’s clients - SquareDash

Trusted Partner for Banks, Challengers, and Fintechs

Emerline’s experts modernize core banking, ensuring operational stability and regulatory alignment throughout the migration, integration, and transformation process.

15+years of experience in fintech and banking app development

Clutch rating 4.9 out of 5 - client reviews.

25 Reviews on Clutch

100+successfully launched financial products

800+Experienced full-time employees

Our offices
Florida, USA
Miami - Headquarters
Poland
Wrocław
Lithuania
Vilnius
Germany
Heidelberg
Map of Emerline’s global office locations: USA, UK, Germany, Poland, Lithuania, Georgia.

Legacy Isn’t Stable. It’s Expensive!

Staying put isn’t stability. Here’s what your legacy core banking system costs as you wait.

78% of budget is trapped

The majority of IT budgets sustain legacy banking infrastructure instead of enabling new product development.

10× costlier to run

Operating costs for traditional core banking software greatly exceed those for modern alternatives.

Months, not weeks

With systems designed for overnight batch processing, any product launch or system change is slow and risky.

Knowledge walking out

As mainframe and COBOL experts retire, critical business rules leave with them.

In a Core Migration, 99.9% Success Is a 100% Failure

Every bank that is serious about core banking transformation hits the same wall — the move itself. The core is the bank's system of record: a migration touches every account, every transaction, and every customer, and there are two places it tends to break, both of which are avoidable.

The risk in how you move

Rip-and-replace makes modernization a single, high-risk bet.

Where it bites:

  • One cutover, one point of failure: if it breaks, it breaks all at once.
  • No way to pause, test, or roll back mid-flight.
  • A public outage isn't just technical—it's regulators, headlines, and customer flight.

The risk in what you move

Most core projects quietly falter in data migration.

Where it bites:

  • Decades of records must remain correct: a 1995 transaction must still make sense in a 2026 schema.
  • "The data moved" is not the same as "the data is probably intact."
  • Errors surface months later, when they're hardest to fix: in balances and statements.

A Path You Can Pause at Any Phase

None of the migration risks is a reason to stay on legacy. It's a reason to migrate differently: we stand up the new core beside the old one and move you across function by function — a strangler-style migration, not a big-bang cutover. Five phases, each with a checkpoint to pause, test, or roll back.

STEP 1

Assess

  • Audit the legacy core, data, and integrations to map actual risk.
  • Establish the total cost of ownership (TCO), including hidden maintenance and compliance costs.
  • Pinpoint the safest, highest-value starting point for the modernization roadmap.
STEP 2

Design

  • Select the right target core—vendor-agnostic, never tied to one platform.
  • Design an API-first, cloud-native target architecture and a phased migration plan around it.
  • Set impact tolerances and KPIs so each phase is measurable for regulators.
STEP 3

Pilot

  • Stand up the new core in parallel with the old, not as a replacement.
  • Test on a single product or segment with real data.
  • Validate the approach, end-to-end, before moving customer-facing elements.
STEP 4

Migrate

  • Migrate in phases — product by product, segment by segment.
  • Validate data integrity at each step with proof, not assumption.
  • Pause, test, or roll back at any checkpoint — never lock into a date.
STEP 5

Operate

  • Run, monitor, and optimize the modern core.
  • Decommission legacy only once everything has been proven.
  • Transfer full ownership of the platform to your team.

Get your free legacy risk assessment and discover the safest, most cost-effective first phase.

Our Core Banking Platform Modernization Capabilities

Legacy cores operate in complex ecosystems built on years of integrations, custom workflows, and regulations. We modernize them using progressive migration, smart integration, compliance automation, and data modernization to enable stability and innovation.

Our Core Banking Platform Modernization Capabilities

Data migration and validation

We migrate decades of ledger records to the new core, verifying each survives intact – down to the bit – not just "probably fine.

Integration and orchestration

We build an API-first, event-driven integration layer that synchronizes new and old cores, routing transactions until the old system retires safely.

Around-the-core build

Modern, microservices-based cores are lean, so we add what they leave out: onboarding, KYC, lending, customer apps, and analytics.

Compliance-as-code

We turn resilience and reporting needs into code, which automates audit trails, evidence, reports, and regulatory tests.

Data quality and AI-readiness

We clean up legacy data, turning years of inconsistency into a foundation your analytics and AI can trust.

We Build to the Rules Your Supervisor Actually Enforces

Core migrations are among banks’ most scrutinized activities. We build for the specific resilience regime that governs your institution.

United Kingdom

The Financial Conduct Authority (FCA) and the Prudential Regulation Authority (PRA) require your core services — your most important functions — to remain within strict impact tolerances, meaning the maximum level of disruption allowed. We treat migration as a resilience event and include the specific evidence your regulator reviews from the outset.

European Union

DORA (Digital Operational Resilience Act) requires organizations to register, monitor, and maintain exit strategies for their core ICT (Information and Communication Technology) third-party providers. Our approach supports compliance by ensuring data portability, well-defined exit paths, and proactive incident reporting from the outset.

United States

US regulatory agencies such as the OCC (Office of the Comptroller of the Currency), the Federal Reserve (Fed), and the FDIC (Federal Deposit Insurance Corporation) issue guidance that is enforced across the financial sector. Our approach supports compliance by addressing outsourcing risk management in line with mandated safety and soundness standards.

Australia

APRA's (Australian Prudential Regulation Authority) CPS 230 regulation holds boards responsible for operational resilience and requires critical operations to keep running within tolerance through disruptions. Our approach fosters smooth regional transitions by building to your tolerance levels and maintaining service-provider registries that can pass audits at any time.

Modern Banking Transformation in Practice

Banking modernization goes beyond tech upgrades. It means complex integration, regulatory continuity, and operational stability. These projects show our expertise in migration, integration, and compliance-driven transformation.

more case studies
Replacing a regional bank's legacy compliance
We replaced a 50-year-old bank's legacy AML systems and integrated them with core banking, detecting 4× more threats, cutting false positives by 60%, and saving 50,000+ hours annually.

Solution category

AML solution

Country

USA

Industry

Fintech

We helped a mid-market lender transition from fragmented legacy systems to a cloud-native, Open Banking-powered platform, achieving 85% faster loan processing and 60% lower underwriting costs.
Our middleware linked Open Banking data with a wealth firm's legacy custodian and CRM, ensuring compliance without full replacement. This cut NIGO errors by 90% and revealed $50M in held-away assets.

See how modernization can work within your existing banking infrastructure.

Why Choose Emerline for Core Banking Platform Modernization

Precision

We validate every record bit-for-bit to ensure complete data integrity; in banking, "probably correct" is a failure.

Clarity

Every phase is delivered with a defined scope, measurable checkpoints, and board-ready reporting for full visibility.

Consistency

We migrate using repeatable, proven frameworks and established methodologies, never resorting to one-offs.

Reliability

Resilience, continuity, and risk controls are engineered in from day one, not tacked on before an audit.

Scalability

What we prove on a single product, process, or business line scales confidently across the institution.

Simplicity

We retire unnecessary complexity rather than add to it; every change should leave the core simpler and easier to manage.

What Our Clients Say

Clients value our rigorous project management, clear communication, and seamless coordination. We document and monitor all project activities, milestones, and deliverables, giving every stakeholder visibility, alignment, and sustained collaboration.

4.9

25 Reviews on Clutch

25 Reviews on Clutch

Emerline is an important part of our strategic team!

Emerline has been our technology partner since late 2012. In the early years I thought that would be a short-term gap fill until I could afford to hire my own technical team in the US. But they have consistently met the demands of our growing company and helped us build what we believe is the industry's best solution option. Emerline provides high quality work, so much so that our platform's reliability and accuracy has been mentioned by our largest customer's internal vendor survey repeatedly. The individuals we work with aren't just contractors, they are an important part of our strategic Team and we enjoy working with them every day!

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Tracy B. Neal, President/CEO, CPG Data
Tracy B. Neal

President/CEO, CPG Data

USA

case study

Emerline has been the best development partner we’ve ever worked with!

Emerline has been the best development partner we’ve ever worked with. The team is very responsive and the quality is very high. They are always willing to do whatever is necessary to support development and customer support efforts. I would recommend them to anyone.

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Michael Lynch, CEO, Praxie
Michael Lynch

CEO, Praxie

USA

case study

We recommend Emerline as a trusted technology partner

We can confidently say that Emerline fully met our expectations, starting with providing high-quality advice on technologies that would improve our solution and continuing with their fast, high-quality implementation. Emerline has strong communication processes in place that kept us apprised of the project's stage and allowed us to discuss any issues on the go. The team was professional and promptly made adjustments when asked. We recommend Emerline as a trusted technology partner for developing telemedicine solutions and would choose to work with Emerline again regarding new projects.

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Felicity Johnson, Founder, Hello Ralphie
Felicity Johnson

Founder, Hello Ralphie

USA

case study

We are very pleased and content with our relationship with Emerline

We are very pleased and content with our relationship with Emerline. We rely on their team for full-stack development of our platform. We respect the high technical caliber and dedication of the team assigned to our project. Emerline provided us with the scaling we needed to grow development capabilities from early-stage POC to now a globally deployed platform in the HR Teach space.

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Alex Shubat, CEO, Espresa
Alex Shubat

CEO, Espresa

USA

case study

We highly recommend Emerline as a technology partner

The Emerline team involved in the completion of our projects demonstrated a high level of responsiveness and support by solving issues and answering questions ASAP. They were diligent and proactively addressed the challenges that arose during the development process. Our cooperation ran smoothly and professionally, and Emerline quickly provided direct and correct advice when necessary. We highly recommend Emerline as a technology partner for large and complicated development projects that also delivers continuous cooperation with the provider on new projects.

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Dr. Andreas Schwarzer, VP Global IT, FUCHS Group
Dr. Andreas Schwarzer

VP Global IT, FUCHS Group

Germany

case study

Emerline helped us build an MVP into a full-fledged production platform — in 14 months

Emerline worked closely with us to take the best ideas from our MVP and integrate them with transactional capabilities for digital payments, workflow for job management, and funds transfers for cash advances. Our platform was built to service the roofing industry getting contractors paid faster so they can focus on growing their businesses and servicing their customers.

Read more
Matt Fruge, Founder and CEO, SquareDash
Matt Fruge

Founder and CEO, SquareDash

USA

case study

They proved themselves reliable technology partners

Throughout our cooperation with Emerline, they proved themselves reliable technology partners. That’s why we trusted them with our new project — website migration to AEM and revamping our brand’s product catalog that we use across multiple websites — without any hesitation. The team always stayed in touch, providing regular feedback and progress updates. The cooperation was smooth, and the work on the project was completed in due time. They provided an efficient solution that allowed us to reduce infrastructure costs; with it, we didn’t have to depend on third-party vendors. Thanks, Emerline! We will definitely continue working with you.

Read more
Renny Joy, IT Director, DRiV
Renny Joy

IT Director

USA

case study

Emerline exceeded expectations!

Redesigning our website wasn't just about updating our look — it was about building a stronger front door for the world to experience Miami’s economic story. As the official EDO for Miami-Dade, we knew the stakes were high. Emerline exceeded expectations. They were consistently organized, forward-thinking, and committed. In less than six months, we had a completely new platform — faster, smarter, and built to grow with us. We’re proud of what we built together!

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Rodrick Miller, President & CEO, Miami-Dade Beacon Council
Rodrick Miller

President & CEO, Miami-Dade Beacon Council

USA

case study

The team gladly brought their expertise and delivered us a perfect solution to meet our customers’ business needs.

The Emerline team wasn’t scared of any challenges and managed to design a solution to cater to any analytical or supply chain tasks. Their enthusiasm and process transparency ensured seamless communication and prompt reaction to any adjustment or focus shift from our side. Their experience and dedication allowed them to provide the solution really fast. We highly recommend choosing Emerline as a development partner if you need a high-end solution for your business.

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Christian Callender-Easby, Founder & CEO, Kontango
Christian Callender-Easby

Founder & CEO, Kontango

USA

case study

We recommend Emerline as a reliable and skilled tech partner

Collaboration with Emerline was one of our best decisions! Their team quickly understood both the technical requirements and the industry-specific challenges we were trying to solve. We needed a secure, flexible platform that could support data-driven formulation across different industries, and Emerline delivered exactly that. Their team approached the task with professionalism, understood our goals, and built a solution that met both technical and user-facing needs.The result is a working platform that reduces manual work, speeds up R&D, and supports faster, smarter formulation processes across various industries. From day one, communication was smooth, timelines were clear, and we felt fully supported throughout the project. We highly recommend Emerline as a tech partner for your future initiatives.

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Dr. Yelena Yesha, Key Partner and Project Leader, FastFormulator
Dr. Yelena Yesha

FastFormulator Key Partner and Project Leader

USA

case study

Emerline demonstrated a deep understanding of the client's vision

Emerline demonstrated a deep understanding of the client's vision, delivering a functional MVP on time and within budget. The team was highly responsive to the client's needs and maintained clear communication throughout. Above all, their exceptional project management skills stood out.

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Natalie Boll, CEO, Founder of Tribela GmbH
Natalie Boll

CEO, Founder of Tribela GmbH

Germany

The level of skill and quality of the developers is outstanding!

Emerline has been helping the client significantly improve their apps for 1.5 years. Their efforts have resulted in positive feedback from users and stakeholders. Moreover, the vendor impresses the client with their skills, flexibility, excellent project management, and effective communication.

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Robert Gill, Director, RedWrasse Ltd.
Robert Gill

Director, RedWrasse Ltd.

UK

Impressed with transparency, proactiveness, and customer-oriented processes

Emerline helped the client deploy the mobile app on the app store. Their team impressed the client with their transparency, proactiveness, and customer-oriented processes. They informed the client about any issues and addressed them swiftly, positively affecting the product quality and work speed.

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Raphaël Briner, CEO & Founder, Visible
Raphaël Briner

CEO & Founder, Visible

Switzerland

My experience with Emerline has been great

The team was hired to design and develop the Echospectra mobile and web applications, as well as to integrate them with a variety of cloud services. A critical requirement was to rapidly develop the apps in an agile manner, quickly implementing important stakeholder and user feedback as it came along, and fixing any outstanding bugs. The team managed to accommodate this kind of agile, change-driven process successfully. Thanks to their rapid development approach, we've been able to build the initial app versions and then continuously iterate on them to refine our product offering and make sure it meets and exceeds customer expectations. I highly recommend them to anyone looking for a reliable partner who delivers on time and on budget.

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Jesse Sprague, CEO, Echospectra
Jesse Sprague

CEO, Echospectra

USA

They were very successful in listening to what we needed

They were very successful in listening to what we needed, making the appropriate suggestions, and pointing us in the right direction. They helped move our software from an awkward and crashy program to one that we depend on everyday. We couldn't do what we do without it.

Read more
Business Director, 3QC, Inc.
3QC

Business Director, 3QC, Inc.

USA

Awards and Recognitions

Industry leaders and technology partners recognize our delivery, engineering, and technical mastery. These accolades underscore our commitment to top development standards and professional practices.

view all awards
Emerline awards
97 awards
Top Fintech Software Development Company 2026
Top Fintech Software Development Company 2026
Top Fintech Software Development Company 2026
Top Fintech Software Development Company 2026
Top Fintech App Development Companies 2026
Top Fintech App Development Companies 2026
Top Financial App Developers 2026
Top Financial App Developers 2026
Top Financial Services Company 2026
Top Financial Services Company 2026
Top Software Development Company 2026
Top Software Development Company 2026
Top Artificial Intellegence Company 2026
Top Artificial Intellegence Company 2026
Top Service Provider 2025
Top Service Provider 2025
Customer Choice 2025
Customer Choice 2025

Frequently Asked Questions About Core Banking Platform Modernization

Here are the questions financial institutions ask most often when mapping or judging a core banking modernization.