Software Modernization Services

We’ve modernized 100+ products: cut dev time by 90%, automated 5 ops under 4 months, and helped 50K-user apps attract new funding.
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    Top Software Development Company for Small Businesses
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    Top IT Services Company, 2025
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    Top Software Development Company, 2025
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    Top Ukrainian Cloud Server Migration Company, 2025

Iman Fadaei
Iman Fadaeiuk

Founder & CEO

They have a broad knowledge base and are ahead of their competitors technically.

Serves Genpact

$400M portfolio company

Murtaza Dabawala
Murtaza Dabawalausa

CEO

We’ve developed great products and achieved tremendous success.

Google Cloud Partner

Trusted by Fortune 5 UHG

Ignacio Doncel
Ignacio Doncelusa

Founder at WishYoo

Clockwise understood exactly what we wanted to deliver to our users.

90

countries worldwide user base

5+

years together

Banning Stack
Banning Stackusa

Principal Estimator at SIDE Partnership, LLC

The team produced excellent materials throughout the discovery phase.

12+

years in all facets of cost estimating

$250k+

value of projects in progress

01 | 04

Fortune #40 Global Health Leader

1886-founded | 131K employees | $16B in R&D

NYSE: EB

850k creators | 300M tickets sold in 2023

8th GPS App in the US

3M+ in 2023 | 10M+ Google Play downloads

Cultural Exchange Led by 2K+ Team

Est. 1980 | 500K+ Alumni | 100+ Countries

$12M Revenue Tech Co.

MBE Certified by NMSDC

Trusted Logistics Co. Since 1979

ISO9001 Certified Systems Integrator

3rd in Retail Inc. 5000

$6M+ raised | #1 ranked company in CT

UCSF-Trusted Health App

with 50K+ users in 60+ countries

Google-Funded Green Tech

144K Ha Monitored | Featured by Reuters

Telecom Experts Est. 2005

Google, Proximus & Orange partners

NASA-Trusted Workflows Builder

Est. in 2007 | PCI, GDPR & HIPAA certified

Top Swiss Agency

Awarded #1 Swiss App in 2025

#2 SMM Agency in Australia

Serves 1k+ Australian B2B across 20+ domains

Google Cloud Partner

Trusted by Fortune 5 UHG

F&B Startup with 25K+ Guests/Y

4.5 on TripAdvisor | 600+ Dining Partners

Fortune #40 Global Health Leader

1886-founded | 131K employees | $16B in R&D

NYSE: EB

850k creators | 300M tickets sold in 2023

8th GPS App in the US

3M+ in 2023 | 10M+ Google Play downloads

Cultural Exchange Led by 2K+ Team

Est. 1980 | 500K+ Alumni | 100+ Countries

$12M Revenue Tech Co.

MBE Certified by NMSDC

Trusted Logistics Co. Since 1979

ISO9001 Certified Systems Integrator

F&B Startup with 25K+ Guests/Y

4.5 on TripAdvisor | 600+ Dining Partners

Google Cloud Partner

Trusted by Fortune 5 UHG

#2 SMM Agency in Australia

Serves 1k+ Australian B2B across 20+ domains

Top Swiss Agency

Awarded #1 Swiss App in 2025

NASA-Trusted Workflows Builder

Est. in 2007 | PCI, GDPR & HIPAA certified

Telecom Experts Est. 2005

Google, Proximus & Orange partners

Google-Funded Green Tech

144K Ha Monitored | Featured by Reuters

UCSF-Trusted Health App

with 50K+ users in 60+ countries

3rd in Retail Inc. 5000

$6M+ raised | #1 ranked company in CT

Trusted Logistics Co. Since 1979

ISO9001 Certified Systems Integrator

$12M Revenue Tech Co.

MBE Certified by NMSDC

Cultural Exchange Led by 2K+ Team

Est. 1980 | 500K+ Alumni | 100+ Countries

8th GPS App in the US

3M+ in 2023 | 10M+ Google Play downloads

NYSE: EB

850k creators | 300M tickets sold in 2023

Fortune #40 Global Health Leader

1886-founded | 131K employees | $16B in R&D

F&B Startup with 25K+ Guests/Y

4.5 on TripAdvisor | 600+ Dining Partners

Google Cloud Partner

Trusted by Fortune 5 UHG

#2 SMM Agency in Australia

Serves 1k+ Australian B2B across 20+ domains

Top Swiss Agency

Awarded #1 Swiss App in 2025

NASA-Trusted Workflows Builder

Est. in 2007 | PCI, GDPR & HIPAA certified

Telecom Experts Est. 2005

Google, Proximus & Orange partners

Software modernization services we deliver

Your software discovery

We audit and deliver a tech plan aligned with business goals to cut inefficiencies, tech debt, and delays.

System integration & API development

We design API integrations to streamline workflows, remove data silos, and speed up delivery across your ecosystem.

UI/UX redesign

Modernize outdated interfaces and fix clunky flows to improve usability, reduce drop-off, and ease navigation.

AI and LLM integration

Implement AI features like semantic search, generative tools, and virtual assistants to reduce operational load.

Modernization services we provided

usaHealthcareSaaSDedicated Development TeamData Visualization
Headsup

Health tracking platform

Revamped UI/UX for web and mobile, improving the experience for 50K+ global users. Set up and maintained end-to-end QA process incl. hiring and management.

Read the case study

4+

years of ongoing collaboration

Series A

funding raised in 2024

Headsup
ukMarketplaceSaaSMobile Development
Whitelance

White-label marketplace app

Transformed the client’s platform into a scalable white-label solution that now serves businesses in 150+ countries, including companies valued at over $3B.

Read the case study

150+

features became available for businesses

5.0

on Clutch

4

continents using the platform

Whitelance
usaMarTechSaaSData Visualization
Sparrow Charts

Social media marketing analytics tool

Implemented a dynamic UI based on D3.js capabilities that became the UVP for our client’s product, which was acquired in 2024.

Read the case study

1.5K

users gained after beta-testing

2022

Grant from Scale-Up Minnesota

Sparrow Charts
usaEntertainment
Eventbrite

Extension for an event management platform

Created a scheduling extension for Eventbrite, allowing 10M+ users to automatically publish and edit events at optimal times.

Read the case study

5.0

on Upwork

4.1

on Google Chrome

Eventbrite
ukMarTechSaaSAI
Releasd

LLM-powered PR reporting tool

Added LLM functionality to a coverage reporting tool, opening an $11.6B market for a client’s product that is trusted by global brands like BBC and Renault.

Case in progress

1

month PoC delivered

4.7

on Capterra

Releasd
ukHealthcareMobile Development
Fika

Mental fitness app

Rewrote and enhanced an iOS/Android app for a mental health startup, introducing new features and supporting its top 5 UK Health & Fitness App ranking.

Case in progress

£1.2M

seed funding raised

40K+

app registrations

Fika
01 | 0601 | 06

Testimonials

Iman Fadaei
Iman Fadaeiuk

Founder & CEO

Clockwise helped us turn our marketplace into a product available as a service. They enabled multitenancy, allowing users to create service marketplaces for any business worldwide. The team is clear, organized, and always available, accommodating our needs. Their broad knowledge and technical expertise put them ahead of competitors.

Dan Weber
Dan Weberuk

President

I needed a larger development team to expand my company, and Clockwise Software has been instrumental in developing four mobile applications. They’ve provided QA testing, automated testing, and implementations using React, Redux, and Node.js. Two apps achieved 100% code and branch coverage, and another reached 99.4%. I’m very pleased with the quality of the work we’ve done together.

Ignacio Doncel
Ignacio Doncelusa

Founder at WishYoo

We needed to enhance our UX by redesigning our platform to make it more engaging. Clockwise Software restructured the backend to ensure intuitive functionality and delivered an eye-popping design. They were professional, always available, and effective communicators, quickly learning our tools. The system passed stress tests with 5,000 users and showed no lag, exceeding our expectations.

Nicolas Slatiner
Nicolas Slatinerusa

Lead Front-end Developer at Orthodox Union

The Clockwise Software developers always help us achieve our goals. Communication is always excellent and deadlines are met most of the time. They’re very transparent. So, It was easy for us to plan ahead whenever there was a complicated task.

They have a very impressive tech understanding. They are very good with all the technologies they work with.

01 | 0401 | 02

Software modernization steps

Here’s how the process of software modernization looks like

Discovery & digital audit

We don’t rush into refactoring or rewriting code. First, we take time to understand how your system works. We start software modernization consulting with a technical and business audit, reviewing architecture, integrations, performance, and dependencies. Then we pinpoint what’s driving the need for modernization, whether it’s scalability issues, slow development, or high maintenance costs. From there, we build a roadmap that shows what to rebuild, what to reuse, and how to reduce risks and downtime. We also define team setup, communication flow, and risk mitigation to keep everything on track.

We know the usual concerns. Yes, we’ll understand your legacy system and logic. No, you won’t lose your valuable custom flows or data.

Learn more

Solution design & planning

Together, we shape the logic and structure of your modernized system, from architecture and user flows to tech stack, integrations, and UI. Our business analyst maps out current workflows and business needs based on user behavior and stakeholder input. The solution architect audits the technical setup: architecture, databases, APIs, dependencies, scaling limits, and tech debt. The project manager sets up the communication plan, defines collaboration formats, and outlines knowledge transfer.

You get wireframes, UI concepts, architecture diagrams, and a step-by-step rollout plan. The modernization services focus is on solving everyday issues and building a system that works better for your team and users.

Learn more

Building your digital solution

Our engineers are sharp, reliable, and experienced in modernizing legacy systems with minimal disruption, whether it’s refactoring, replatforming, or rebuilding from scratch. We follow Agile to stay flexible and adjust to changes without derailing the process. You’ll see progress every sprint through regular demos and clear communication, with full visibility into what’s being delivered and why.

We track metrics like SPI and CPI to keep scope, timing, and budget under control. Weekly reports compare estimates to actuals, so you always know where things stand. Just transparent progress and a system that gets better sprint by sprint.

Built-in quality assurance

Quality for us isn’t just about catching bugs. It’s about making sure the system solves real business challenges. That means cutting manual work, preventing costly errors, and streamlining workflows. QA is part of every development stage, not left for the end.

Our software modernization agency runs manual and automated tests to catch issues early and keep quality high. Our team checks performance, edge cases, and integrations. Once features are ready, we test them with real users (your team) in real scenarios, not just ideal ones. This helps us refine usability and ensure the system delivers value where it matters.

With gradual rollouts, your team gets tested improvements step by step.

Learn more

Deployment & launch

Our team plans the deployment in detail: testing in staging, validating real-world scenarios, and rolling out in controlled phases to ensure stability.

We handle the transition from your old system to the new one with care, preserving business logic and migrating data without compromising operations. Where needed, we run alpha or beta launches to gather feedback, fine-tune performance, and build confidence ahead of the full release.

After launch, we stay on it, monitoring performance, resolving issues quickly, and making sure your team gets value, not headaches.

Clear software modernization services

Timelines under control

Budget in check

Visibility that builds trust

Risk handled with experience

Delivery you can plan around

In modernization services, timing matters, especially when you're upgrading systems that your business depends on daily. We keep delivery on track using SPI to monitor progress and keep deviations below 10%. You always know what’s done, what’s next, and what might need adjusting, thanks to visibility through sprint boards, demos, and regular check-ins.

transparent software modernization

Why choose us

  • Top Eastern European talent, PMI-compliant delivery, and expert QA.
  • We track CPI & SPI and manage scope continuously to keep your project on track.
  • Only the top 1% make it: 200 apply → 50 calls → 30 tests → 5 interviews → 1 hire
  • Clear communication via tailored plans, regular updates, and responsive feedback.
  • No surprises: detailed reports, full code access, and transparent documentation.
  • Flexible and lean setup: no long-term contracts, no legal complications.

100+

software modernized

99.89%

acceptance rate

3.3

years avg. tenure

5.5%

employee churn rate

<10%

CPI & SPI variance

94.12%

satisfaction rate

Free consultation

Want a clear plan to modernize your app? We’ll audit, design, and rebuild with <10% CPI variance and full visibility. Start with a free consultation.

  • Response in 24 hours
  • Estimate in 10 days
  • Experts involved
Serhii

Head of Client Relations

Eugene

Account Executive

Serhii photoEugene photo

Solutions we modernize to perform best

SaaS and customer-facing platforms

Rebuild your architecture to scale efficiently, release faster, and roll out new features without regressions.

Marketplaces and booking systems

Refactor complex logic and redesign user flows to stabilize scheduling, simplify vendor ops, and handle high transaction volumes.

Location-based and logistics apps

Upgrade your backend to support real-time data, improve sync reliability, and optimize routing with modern mapping tools.

Let’s address the questions that come first

Will we need to rebuild everything from scratch?

Not unless it truly makes sense. We kick off modernization services with a thorough audit to pinpoint what’s solid and what’s holding you back. In most cases, we keep the good parts and modernize only where it counts, so you save time, cut waste, and invest in real impact, not busywork.

Can we keep using our system during modernization?

Yes. We design every software modernization solution to fit around your operations, not disrupt them. With parallel development, phased releases, and careful coordination, your team keeps working without interruption while we upgrade everything under the hood.

How do you handle data migration and compatibility with old formats?

We migrate data in carefully planned stages to minimize risk and downtime. In most cases, there may be a short maintenance window, we’ll plan it around your low-traffic periods and communicate clearly to avoid surprises.

Once data starts flowing into the new system, full rollback isn’t possible, so we run extensive validation and dry runs beforehand. If your existing integrations are staying in place, we ensure compatibility. And if you're phasing them out, we help you transition safely without breaking operations.

How much will software modernization cost?

It varies. Modernizing a single tool is a very different story from reworking multiple interconnected systems. We’ve handled projects ranging from $20K to over $1M, so there’s no template answer here.

What you can count on is a grounded estimate. During discovery, we’ll map out what needs to change, what’s worth keeping, and what brings the most value. You’ll get a detailed breakdown of scope, timelines, and costs, with a CPI that stays within 10%, so you can plan with confidence.

How long does a software transformation project take?

That depends on what you’re modernizing. A targeted update (like reworking a single process) can take 3–4 months. A deeper overhaul involving multiple systems or teams may run 12+ months.

We don’t guess. After discovery, you’ll get a clear roadmap with priorities, delivery phases, and realistic dates. We track SPI to keep everything moving and flag any blockers early.

You’ll see value early too. We roll out improvements step by step, so you’re not stuck waiting for a big reveal; most clients start seeing modernization services impact within the first few months.

Will the end result meet the quality we expect?

That’s non-negotiable. We treat quality as a system, not a checkbox, from clear requirements to peer-reviewed code, automated tests, and hands-on QA. You get regular demos, detailed feedback loops, and full access to code, boards, and docs, so nothing’s hidden, and nothing falls through the cracks.

Our engineers are known for consistency, care, and high standards. Clients often say we outperform their in-house teams, not just on output, but on ownership and detail. We align with the benchmarks that matter to you, whether that’s clean code, test coverage, or pixel-perfect delivery. 

Will we have visibility and influence while the work is happening?

You’ll have a front-row seat to everything we do: task tracking, documentation, delivery timelines, you name it. We keep communication steady with weekly syncs, async updates, and working demos, so you’re never left guessing. You’ll be involved in key decisions, able to review progress in real time, and fully equipped to guide the direction as things evolve. Clear collaboration is baked into how we work.

Will our team be able to manage the system independently?

You will. We build with your team in mind, not to keep you dependent. That means clear documentation, full access to code and infrastructure, and a proper handover that leaves no question marks. We’ll guide your team through the system so they can confidently take over, improve it, and scale it long after launch. 

How can we be sure you’ll deliver exactly what’s agreed on?

We align early and stay aligned. That starts with clear documentation of features, designs, and wireframes. If your ideas are still rough, we help shape them using proven business analysis techniques, so we’re working from a shared, well-defined vision.

You’ll see progress early through prototypes and demos, giving you the chance to review, give feedback, and fine-tune before anything goes live. Agile development keeps us flexible, so we can adapt as things evolve without losing focus.

After launch, we stay in the loop. Real users bring fresh insights, and we help you prioritize improvements based on actual feedback instead of assumptions. That way, what we build continues to match your goals and your users’ needs over time.

Will our team stay stable throughout the project?

Your core team stays consistent throughout the project, with developers, QA engineers, and the project lead deeply involved from day one. They get to know your product inside and out, both technically and from a business perspective.

Our average tenure is 3.8 years (well above the majority of software modernization vendors), and our churn rate is just 5.5%. If we ever need to bring in new people, we do it right: structured onboarding, clear documentation, and close support from the existing team to keep momentum and quality intact.

How will we fully understand the outsourced code for internal maintenance?

From the start, we focus on knowledge sharing: your developers can join syncs, review our code, and get familiar with the architecture and workflows as they evolve.

Everything is documented, clearly and accessibly. From setup instructions to code structure and key decisions, your team gets the context they need to maintain, troubleshoot, and even extend the system on their own.

If you ever decide to bring development fully in-house or switch vendors, we make the transition seamless. You’ll get a full handover with walkthroughs, final documentation, and direct support from our team to make sure nothing gets lost in the process.

Will language barriers slow down collaboration?

Not at all. Our team communicates clearly and confidently in English: we work with international clients every day. You won’t need to repeat yourself or decode vague messages. We keep software modernization services straightforward, async-friendly when needed, and we always speak up if something’s unclear. Clear communication is a core part of how we make digital transformation feel smooth.

Who owns the code and assets after launch?

Everything we build for you, from code to documentation, is 100% yours. We formalize this in our agreement from day one. You’ll have full access to the codebase, infrastructure, and project assets, so you can scale or hand it off however you choose.

How do you ensure delivery stability while operating from Ukraine?

Our team operates across multiple regions, with infrastructure in place to ensure business continuity no matter the circumstances. We’re energy-independent, and our setup isn’t tied to a single location, so delivery never stops.

Since 2022, we’ve kept projects moving, grown our team, and delivered consistently, even through wartime. You can rely on us to keep modernization services moving forward, no matter what’s happening in the background.

Can we rely on your estimates to stay on track?

After discovery, you get a detailed estimate with clear timelines, feature breakdowns, and cost projections. During development, we track CPI to monitor budget health and keep variance under 10%. You’ll always have full visibility, and if priorities shift, we flag it early and adjust together. No surprises, just steady, informed progress.

Key people

Andrii
Andrii
Founder & CEO
Clockwiser from Day 1 | Led Clockwise to Top Ukrainian IT Company
Andrii
🎤 Karaoke champion
🧠 Quiz monster
🐈 Cat team
Bogdan
Bogdan
Head of Delivery
10 y. of experience | Set up delivery with 99.88% acceptance rate
Bogdan
🏂 Snowboarder
💿 DJ
🥁 Drummer
☕ Coffeeholic
Serhii
Serhii
Head of Client Relations
11 y. of experience | 98% client satisfaction rate
Serhii
🚞 Traveller
Gym rat
☕ Coffeeholic
Natalia
Natalia
Head of People
10 y. of experience | 100+ hired talents
Natalia
Hyggeist
Wanderlust Soul
🏊‍♀️ Swimmer
🕯️ Detail Aesthete
Mike
Mike
Solution Architect
15 y. of experience | 50+ projects with 99,99% uptime reliability
Mike
🧑‍🍼Father of 3
Pavlo
Pavlo
Tech Lead
15 y. of experience | Managed 40+ developers as Tech Lead
Pavlo
💨 Motorhead
🧰 Tinkerer
Andrii
Andrii
Founder & CEO
Clockwiser from Day 1 | Led Clockwise to Top Ukrainian IT Company
Andrii
🎤 Karaoke champion
🧠 Quiz monster
🐈 Cat team
Bogdan
Bogdan
Head of Delivery
10 y. of experience | Set up delivery with 99.88% acceptance rate
Bogdan
🏂 Snowboarder
💿 DJ
🥁 Drummer
☕ Coffeeholic
Serhii
Serhii
Head of Client Relations
11 y. of experience | 98% client satisfaction rate
Serhii
🚞 Traveller
Gym rat
☕ Coffeeholic
Natalia
Natalia
Head of People
10 y. of experience | 100+ hired talents
Natalia
Hyggeist
Wanderlust Soul
🏊‍♀️ Swimmer
🕯️ Detail Aesthete
Mike
Mike
Solution Architect
15 y. of experience | 50+ projects with 99,99% uptime reliability
Mike
🧑‍🍼Father of 3
Pavlo
Pavlo
Tech Lead
15 y. of experience | Managed 40+ developers as Tech Lead
Pavlo
💨 Motorhead
🧰 Tinkerer
Dmytro
Dmytro
Tech Lead
15 y. of experience | 10+ AWS projects led
Dmytro
🏎️ F1 Fan
🍻 Beer connoisseur
☕ Coffee aficionado
Yana
Yana
Design Lead
12 y. of experience | 100% UI/UX acceptance rate after user tests
Yana
👩‍🎨 Local artist
🧘‍♀️ Yoga practitioner
🦻Hearing Accessibility Advocate
📚 Bibliophile
Bogdan
Bogdan
QA Lead
17 y. of experience | QA Lead on 10+ multi-domain projects
Bogdan
🎓 Nerd
⛷️ Ski fan
Strong Spirits expert
Andrii
Andrii
Project Manager
8 y. of experience | 30+ projects delivered
Andrii
🏎️ Junior Car Drifter
🧳 Traveller
☕ Coffee enthusiast
Tetiana
Tetiana
Business Analyst
5 y. of experience | Saves $30K on avg./client with discovery
Tetiana
🧠 Braving the unknown
💬 Empathy-driven communicator
🏖️ Passionate traveler
01 | 04

Awards

Show more
Top Software Development Company, 2025
Top Software Development Company, 2025
Top IT Services Company, 2025
Top IT Services Company, 2025
Listed Among Top 1000 Companies Globally
Listed Among Top 1000 Companies Globally
Top NodeJS Developers, 2025
Top NodeJS Developers, 2025
Top Managed Service Provider in 2025
Top Managed Service Provider in 2025
Top Software Development Company, 2025
Top Software Development Company, 2025
Top IT Services Company, 2025
Top IT Services Company, 2025
Listed Among Top 1000 Companies Globally
Listed Among Top 1000 Companies Globally
Top NodeJS Developers, 2025
Top NodeJS Developers, 2025
Top Managed Service Provider in 2025
Top Managed Service Provider in 2025
Top Ukrainian Cloud Server Migration Company, 2025
Top Ukrainian Cloud Server Migration Company, 2025
Top Ukrainian Hosting and Cloud Service Company, 2025
Top Ukrainian Hosting and Cloud Service Company, 2025
Top Ukrainian IT Services Company for Real Estate
Top Ukrainian IT Services Company for Real Estate
Top Software Developers for Advertising and Marketing, 2025
Top Software Developers for Advertising and Marketing, 2025
Top IT Services Company for GPS Navigation and GIS, 2025
Top IT Services Company for GPS Navigation and GIS, 2025
Top Software Development Company in Ukraine for Startups
Top Software Development Company in Ukraine for Startups
Top Software Development Company for Small Businesses
Top Software Development Company for Small Businesses
Top React Development Company
Top React Development Company
Top B2B Company Globally, Fall 2024
Top B2B Company Globally, Fall 2024
Top B2B Company Globally, Spring 2024
Top B2B Company Globally, Spring 2024
Top Software Development Company, 2023
Top Software Development Company, 2023
Top IT Services Company, 2023
Top IT Services Company, 2023
Most Reviewed Software Developers on Clutch
Most Reviewed Software Developers on Clutch
Top NodeJS Development Company, 2023
Top NodeJS Development Company, 2023
Top Software Development Company for Marketing and Advertising, 2023
Top Software Development Company for Marketing and Advertising, 2023
Top Ukrainian IT Services Company for Advertising and Marketing
Top Ukrainian IT Services Company for Advertising and Marketing
Top Ukrainian Development Company, 2021
Top Ukrainian Development Company, 2021
Top Ukrainian Development Company, 2020
Top Ukrainian Development Company, 2020
Top Ukrainian B2B Company, 2019
Top Ukrainian B2B Company, 2019
Top Ukrainian Development Company, 2018
Top Ukrainian Development Company, 2018
01 | 25

Modernize with confidence

Our 99.89% acceptance rate proves we deliver exactly what we promise. Let’s talk.
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