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Client Cases: Software Projects That Prove the Point

Real challenges, real solutions, real results. Explore how 3Bird delivered across both propositions and multiple industries.

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These six client cases show what 3Bird delivered with 3Bird People, 3Bird AI Lab and hybrid teams, across e-commerce, healthtech, fintech and startups.

Fastest MVP
10 business days
Largest saving
70% versus a local team
Payment platform
8 providers in 4 months
Prototype cost
From €8k
Industries
E-commerce, healthtech, fintech, logistics
3Bird People E-Commerce

E-Commerce Platform Overhaul for a European Retailer

Rebuilding a legacy .NET platform with a modern React frontend and microservices backend.

A mid-size European retailer was running on a 10-year-old monolithic .NET platform. High maintenance costs, frequent outages, and an inability to add new features without 6-week release cycles were strangling growth.
3Bird People deployed a team of 4 developers (2 backend .NET, 2 React frontend) supervised by a European CTO and PM. Working in 2-week sprints, they migrated the platform to a microservices architecture with a modern React frontend over 6 months.
70%
Cost vs local team
6×
Release frequency
99.9%
Uptime post-launch
3Bird AI Lab Startup

Investor-Ready Startup MVP in 10 Days

AI-Sitters built a full-stack SaaS MVP from scratch in 10 business days for a seed-stage startup.

A startup had 6 weeks until their first investor demo, limited budget, and zero existing code. They needed a functional, polished MVP to prove their concept and close a seed round.
AI-Sitters used Cursor AI and Claude to generate the full application structure, components, and API integrations in parallel. Human engineers reviewed every module, refined UI, wrote tests, and handled security in daily QA cycles. The MVP launched in 10 business days.
10
Days to working MVP
€120k
Seed funding secured
65%
Below estimated dev cost
Hybrid HealthTech

Legacy System Modernization for HealthTech Company

AI-assisted refactoring combined with dedicated 3Bird People developers for a 40% time saving.

A HealthTech company had a critical patient management system written in legacy Java. Refactoring to modern Spring Boot + React was estimated at 12 months with their in-house team. They needed to accelerate without sacrificing GDPR compliance.
3Bird used a hybrid approach: AI-Sitters handled 60% of mechanical refactoring (class migrations, API transformations, boilerplate generation) while 3Bird People senior developers owned business logic migration, GDPR compliance checks, and quality gates.
40%
Development time saved
3×
Deployment frequency
€180k
Cost savings vs estimate
3Bird People FinTech

Payment Integration Platform for FinTech Scale-up

Dedicated full-stack team built a multi-provider payment orchestration layer in 4 months.

A FinTech scale-up needed a payment orchestration platform supporting 8 providers across Europe. Their in-house team of 3 developers couldn't handle the scope alongside ongoing product work.
3Bird deployed a dedicated team: 2 senior backend (.NET + Node.js), 1 frontend (React), and a European fractional CTO for architectural decisions. The team integrated seamlessly with the existing in-house team via Agile sprints.
4mo
Full platform delivered
8
Payment providers integrated
60%
Cost vs local alternatives
3Bird AI Lab E-Commerce

AI-Powered Recommendation Engine Prototype

AI-Sitters prototyped a personalized product recommendation engine in 5 days for A/B testing.

An online retailer wanted to test whether a recommendation engine would improve basket size. Building it traditionally to test the hypothesis would cost €40k and take 2 months. They needed a proof-of-concept first.
AI-Sitters generated a working recommendation engine prototype using collaborative filtering + LLM-assisted product matching in 5 days. After human review and QA, it was deployed to 10% of traffic for A/B testing.
5
Days to prototype
+18%
Average order value
€8k
Total prototype cost
Hybrid Startup

B2B SaaS: From Concept to Scale in 8 Months

AI Lab built the MVP, 3Bird People scaled it: a textbook hybrid success story.

A B2B logistics startup needed to go from concept to paying customers in 8 months or lose their pre-seed runway. Traditional development would take 12+ months for the full feature set.
Months 1-2: AI-Sitters built core MVP (shipment tracking dashboard + API). Months 3-4: Customer validation and iteration. Months 5-8: 3Bird People team (3 devs) scaled the platform, added integrations, and prepared for enterprise sales.
8mo
Concept to first revenue
12
Paying enterprise clients
50%
Under original budget

Questions About Our Results

E-commerce platforms, SaaS MVPs, legacy system modernisation, payment integrations and AI prototypes such as recommendation engines, for retailers, healthtech and fintech companies, logistics firms and startups.

Up to 60-70% compared with hiring locally. In the e-commerce case the client paid 70% less than a local team would have cost; the fintech scale-up paid 60% less than local alternatives.

In the startup case, AI-Sitters delivered an investor-ready SaaS MVP in 10 business days. A recommendation-engine prototype for an online retailer took 5 days and cost €8k.

Yes. Several of these cases started from legacy code, such as a 10-year-old .NET monolith and a legacy Java patient system. We review the codebase first, then migrate or extend it in 2-week sprints.

Yes. Clients range from pre-seed and seed-stage startups that need an MVP to mid-size retailers, healthtech companies and fintech scale-ups that need extra development capacity.

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