Partnering with Mondaysys returns $400k+ in yearly savings on average.
Build. Test. Scale. Expert teams that ship & support for
High-quality work, delivered on schedule. With 18+ years serving global brands, we bring enterprise standards at an affordable, transparent cost.
Available for new Projects
We deliver reliable custom software with enterprise-grade security, on-time delivery and strict QA. From CRO- A/B test development to Shopify builds and AI/ML apps, senior engineers ship fast and stand behind each release.
High-Caliber Services. Built for Quality.
A/B Testing Development 01
From quick wins to complex builds, we plan, develop, QA, and launch A/B, MVT, and personalisation campaigns end to end, covering strategy, design, analytics, and iteration, so experiments ship faster, scale reliably, and move the metrics.
- Optimizely
- AB Tasty
- VWO
- Adobe Target
- Convert
- Kameleoon
Shopify Development 02
Ready to migrate to Shopify or refresh your store? Our team handles strategy, design development, and data migration, so you launch faster, sell more, and stay secure. Get a zero-stress Shopify upgrade with expert support.
- Shopify
- Shipify Plus
- Shogun
- Klaviyo
AI/ML Apps Development 03
Need smoother processes, higher efficiency, or a teammate? Our AI engineers build practical AI app(s) that streamline work, automate routine tasks, and amplify impact, so your team moves faster with confidence and clarity.
- OpenAI
- Gemini
- Grok
- DeepSeek
- Llama
WordPress Development 04
We specialise in custom WordPress development, from building bespoke themes and templates to extending functionality with tailored plugins. Whether you need unique layouts, advanced features, or performance improvements, we make WordPress do exactly what your business needs.
- Theme Development
- WooCommerce
- Optimization
- Migration
UI/UX Design 05
Your customers deserve delight and so do you. Our UI designers craft interfaces that look sharp and feel effortless, aligning beauty with usability to drive conversions, reduce friction, and create experiences people love
- Figma
- Sketch
- Adobe XD
- Miro
- Balsamiq
MondayPOS: Supermarket ERP 06
Supermarket POS & ERP for speed: barcode checkout, real-time stock, pricing & promos, GRN/returns, supplier terms, accounting, loyalty. Multi-branch, online/offline sync, dashboards cut shrink, lift margins, scale. Swift.
- MondayPOS
- Sales
- Buying
- Stock
- HRMS
Trusted by Leading Agencies & World-class Brands
We deliver reliable custom software with enterprise-grade security, on-time delivery and strict QA. From CRO/A/B test development to Shopify builds and AI/ML apps, senior engineers ship fast and stand behind each release.
Process we follow
01
Launch
Final tweaks, peer review against the plan, and handoff to launch, so you can start collecting results with confidence.
02
QA
Run manual checks across agreed devices/browsers, log/fix issues rapidly and capture screen recordings for evidence.
03
Build
Develop the variations, validate in console, and package clean, modular code for the testing platform.
04
Estimate
Provide a clear breakdown of dev and QA hours, tasks, devices/browsers, and scenarios to be covered.
05
Kickoff & Clarify
Review your test plan, align on hypotheses and variations, map edge cases, and confirm scenarios so nothing’s ambiguous before we proceed.
Why Choose Mondaysys
OmniStack
Tech agnostic engineering
Tech agnostic experimentation, built to fit your stack. We implement tests across major platforms and tools, client or server-side, SPA, React, Next, Shopify, Magento, headless or monoliths. Any environment. we handle integration, performance, and data-layer fidelity, delivering clean, production-ready variants.
Assurance
Thorough, evidence first QA
Our QA team pressure-tests every variant across devices, browsers, and network conditions pushing edge cases, accessibility states, and viewport breakpoints. We verify data layers, events, and conversions, validate targeting and audiences, and catch regressions early so experiments execute cleanly.
Stewardship
Proactive partnership
When something isn’t quite right, we surface it early, clearly, candidly, and with context. We’ll lay out pragmatic options, trade-offs, and likely impact, then recommend a best path forward so you can decide with confidence and keep momentum toward the strongest business outcome. We document decisions and next steps, own follow-through.
Unison
One team, zero handoffs
Solutions engineers and QA work as one squad, side by side. Feedback flows instantly, issues are reproduced and fixed fast, and small findings never become blockers. Fewer handoffs, fewer loops, faster approvals - momentum stays high and releases land on schedule. Shared context enables zero-latency triage and no ticket ping-pong. Always.
Mastery
Proven depth
32,000+ hours building and shipping A/B, MVT, and personalization variants means we’ve seen the edge cases, learned the patterns, and know the pitfalls. We bring battle-tested code, predictable delivery, and performance discipline to every test, so your experiments run clean and lift the metrics. Expect fewer loops, clearer, steadier wins!
Efficiency
Cost-effective seniority
Senior engineers and dedicated QA drive quality and speed: tighter scoping, cleaner code, fewer loops, and on-time launches. You get predictable delivery, lower rework, and better ROI, premium execution without the premium price. Fewer handoffs, less context loss, stronger data-layer integrity, and faster, more confident approvals. Always.
“We launched a clean Shopify migration in 5 weeks no downtime and saw +27% revenue over BFCM.”
Our legacy store crashed under promo traffic. Mondaysys planned a phased cutover, live-synced inventory, and rehearsed rollback paths. Launch day felt boring in the best way and BFCM finally scaled without firefighting.
“The LLM chatbot deflects 38% of tickets and cut first response time to under a minute.”
Support was drowning in “Where’s my order?” tickets. Mondaysys trained an LLM on our policies, added guardrails, and integrated with Helpdesk for order status and refunds. Agents now handle the hard stuff; the bot handles the rest, fast.
“Their QA discipline drove defect escape below 0.8% releases are finally boring (in the best way).”
We shipped features but also bugs. Mondaysys built a risk-based test plan, added Playwright automation, a11y checks, and data-layer contracts. A pre-release gate stopped regressions cold users noticed stability, not slips.
“Cloud cost down 35%, deployments moved from weekly to daily, Mondaysys modernized our DevOps fast.”
Infra spend climbed while deploys lagged. Mondaysys right-sized clusters, set autoscaling, codified everything in IaC, and rebuilt CI/CD with canary releases. Teams ship daily now and finance finally smiles at the bill.
“The mobile app relaunch cut crash rate by 70% and bumped ratings from 4.2 to 4.8.”
Crashes spiked during peak hours. Mondaysys instrumented the app, traced memory leaks, added offline caching and progressive sync, and simplified onboarding. The app feels instant; reviews turned into referrals.
“Attribution finally makes sense, CAC down 15% after Mondaysys fixed our GA4 and data layers.”
Our channels argued over credit; budgets were blind. Mondaysys audited tags, moved us to server-side, deduped events, and standardized UTMs. Now we fund what works—and cut what doesn’t.
“Mondaysys tripled our A/B test velocity and delivered a 22% conversion lift in six weeks.”
Our tests were stuck behind dev queues and a messy data layer. Mondaysys set up a reusable experiment library, fixed analytics contracts, and created a QA checklist so releases didn’t stall. We went from 2 to 6+ tests/month and finally learned what moved revenue.
“Their MondayPOS ERP rollout gave us 98.5% inventory accuracy and cut checkout time by 40%, game changer.”
Shrink and price disputes were draining margins. Mondaysys ran a full stock audit, mapped barcodes to variants, and enforced pricing rules at POS. Cashiers stopped overriding prices; managers got real-time stock lines got shorter, errors vanished.
“Personalized recommendations from Mondaysys boosted AOV by 18% and repeat purchases by 12%.”
Customers couldn’t find the right shades, so carts stayed small. Mondaysys cleaned our catalog, trained an AI ranker on purchase + browse signals, and launched bundles for cold-start users. Discovery felt human, baskets grew overnight.
We Speak Your Stack
We sustain legacy apps, accelerate current roadmaps, and add AI where it truly moves the needle.
- Node.js
- Java
- iOS
- C#
- Android
- laravel
- Vue.js
- React
- PHP
- .NET
- Node.Js
- Python
- .liquid
- Ruby
- Node.js
- Java
- iOS
- C#
- Android
- laravel
- Vue.js
- React
- PHP
- .NET
- Node.Js
- Python
- .liquid
- Ruby
Frequently Asked Questions
What is A/B testing (in one sentence)?
A controlled experiment that splits traffic between two (or more) versions to measure which one improves a target metric (e.g., conversion rate, revenue per visitor).
Why is A/B testing important for my website?
It turns guesses into measured wins, reduces redesign risk, and compounds revenue by shipping only what proves to lift your KPIs.
How long should a test run?
Often 1–2 weeks (sometimes longer) to cover behavior cycles and reach a trustworthy sample; exact duration depends on traffic, baseline conversion, and expected lift.
Will A/B testing hurt my SEO?
No—when done correctly (no cloaking, use 302s for temporary redirects, use rel=canonical, don’t run tests for excessive durations). This is straight from Google’s guidance.
Can I still use Google Optimize?
No, Google Optimize sunset on September 30, 2023. We migrate clients to platforms like Optimizely, VWO, Convert, AB Tasty, LaunchDarkly, or Statsig.
What if my site has low traffic can I still test?
Yes: run higher-impact changes, use site-wide tests, combine micro-conversions, or use methods like sequential analysis and Bayesian approaches; supplement with research (surveys, recordings, heuristic reviews).
What does your “A/B Test Development” include?
End-to-end build: spec → design → engineering (platform-agnostic) → analytics tagging → cross-device QA → launch → monitor → analyze → ship winner → document learning.
Do you handle QA and analytics?
Yes. We pressure-test variants across devices/browsers, validate events (GA4/Segment/Adobe), and share QA checklists and test readouts.
Can Mondaysys work with our existing team?
Absolutely. We plug in as an experimentation pod or augment design/engineering/analytics to increase velocity without disrupting your process.
What tools do you support?
Optimizely, VWO, Convert, AB Tasty, Dynamic Yield, Adobe Target, Kameleoon, LaunchDarkly/Statsig (feature flags), and custom frameworks. We integrate with GA4, Segment, Adobe, Looker, and your data warehouse.
How do I get started with Mondaysys?
Book a quick discovery. We’ll run a rapid audit (traffic, analytics, tech stack), propose a 90-day experiment plan, and start with a pilot test.
How do I hire a great Shopify developer (fast checklist)?
Look for: (1) theme & Liquid mastery, app/extensibility, and Shopify CLI; (2) performance (Lighthouse, LCP/CLS), accessibility, and SEO basics; (3) experience with Shopify Plus, checkout extensibility, Scripts/Functions; (4) analytics/GA4 events; (5) clear comms, clean Git habits, and QA discipline. Ask for code samples and shipped storefronts.
Can you A/B test on Shopify?
Yes, theme variants, templates, sections, PDP, cart, and (with Plus/eligible setups) certain checkout experiences via approved methods or platform tools; Shopify publishes guidance for merchant-assigned testing in specific components.
Do you build custom Shopify features too?
Yes. We handle theme builds, app integrations, performance tuning, internationalization, subscriptions, and CRO-driven UX updates.
How much do your services cost?
We scope to your goals and traffic. Typical models: (1) Experimentation Pod (monthly retainer) for steady velocity; (2) Fixed-fee pilot (audit + 1–2 launches); (3) Project-based Shopify builds. Request a tailored plan after a 30-min discovery.
Do you support Bayesian or frequentist analysis?
Both, we choose based on your data volume, decision cadence, and stakeholder preference, and we document assumptions either way.
What if a test is inconclusive?
We capture the learning, refine the hypothesis, and iterate (bigger change, better targeting, or different step in the funnel).
How many conversions do I need to trust a result?
There’s no single magic number it depends on baseline rate and desired lift. We estimate sample size up front and won’t call a winner before confidence thresholds are met.
How quickly can you launch the first test?
Commonly 1–2 weeks after access and audit (faster if your tagging and environments are ready).
Will experiments slow down my site?
Our builds are performance-first (async loads, minimal blocking, code splitting). We monitor Core Web Vitals on variant and control.
Do you migrate teams off Google Optimize?
Yes, assessment, tool selection, event parity, QA, and phased cutover from Optimize to an enterprise-grade platform.
Can you coordinate with our SEO team during tests?
Yes, we follow Google’s testing guidance (302s, rel=canonical, no cloaking) and share test scopes/URLs so SEO stays healthy.
How many conversions do I need to trust a result?
There’s no single magic number it depends on baseline rate and desired lift. We estimate sample size up front and won’t call a winner before confidence thresholds are met.
What if a test is inconclusive?
We capture the learning, refine the hypothesis, and iterate (bigger change, better targeting, or different step in the funnel).
How quickly can you launch the first test?
Commonly 1–2 weeks after access and audit (faster if your tagging and environments are ready).
Will experiments slow down my site?
Our builds are performance-first (async loads, minimal blocking, code splitting). We monitor Core Web Vitals on variant and control.
Do you migrate teams off Google Optimize?
Yes, assessment, tool selection, event parity, QA, and phased cutover from Optimize to an enterprise-grade platform.
Can you coordinate with our SEO team during tests?
Yes, we follow Google’s testing guidance (302s, rel=canonical, no cloaking) and share test scopes/URLs so SEO stays healthy.