Building a new SaaS product
You have a product to build and need a senior engineer to shape the architecture, write the software, and lead the path to production.
Nested Minds DOO
Senior-led engineering for SaaS products.
We help founders build new SaaS products and teams improve the ones they already run. Ivan Đurđevac leads the architecture and stays hands-on through release.
Selected product work01 / 03
Who we help
For the product you are building, or the one you need to improve.
Evolving an existing SaaS
Your product is live. Legacy code, infrastructure, or release practices are making the next stage of work harder than it needs to be.
Services
Engineering across the product lifecycle.
From first architecture decisions to work inside a live platform, we stay close to the code and accountable for delivery.
SaaS Product Engineering
Turn a product idea or major new capability into a working SaaS system. Architecture, implementation, integrations, and release stay connected.
Legacy SaaS Modernization
Make a live product easier to change and safer to release. Improve the parts that create friction while keeping the service running.
Technical Leadership & Architecture
Get senior technical judgment close to the work. Clarify tradeoffs, guide implementation, and keep architecture accountable to delivery.
Selected work
SaaS systems
we have shaped.
Three different product challenges, with real interfaces and the engineering decisions behind them.
New SaaS platform
StanNaDan
- 1,332 properties migrated
- Search, pricing & reservations
- Production readiness
A new rental marketplace with date-aware search and pricing, reservations, data migration, and preparation for production.
Read case studyProductStanNaDan
Established SaaS
KlikFX
- Laravel & Yii2
- Backend ownership
- Docker & deployment work
Backend ownership in a complex live SaaS, with Docker-based environments and coordinated releases across Laravel and Yii2.
Read case studyProductKlikFX
Very good work from Ivan who took over the backend of a complex SAAS with many features and brought some much needed professionalism into our processes. I definitely recommend working with him!
Zero-to-one SaaS
License Bridge
- Stripe, Paddle & PayPal
- WordPress SDK
- Production infrastructure
A licensing and payments product built from idea to production, including APIs, a WordPress SDK, and delivery infrastructure.
Read case studyProductLicense Bridge
How we work
Principles that stay close to the code.
- 01
Understand the product first
Architecture starts with business requirements and the constraints of what already exists.
- 02
Make technical decisions explicit
Discuss tradeoffs and decide what belongs in the current phase versus what can wait.
- 03
Stay hands-on
Architecture and technical leadership stay connected to implementation and release.
- 04
Own the path to production
Development, testing, infrastructure, CI/CD, deployment, and operational considerations belong to one delivery process.
- 05
Build for continued development
Prefer systems that become easier to change instead of accumulating one-off fixes.
Leadership
Senior engineering, personally led.
Ivan Đurđevac
Founder & Senior SaaS Engineer
Ivan has developed software professionally since 2004 and worked on production SaaS since 2013. He leads architecture and implementation directly with founders and product owners. When a project needs more engineering capacity, he brings in additional people while keeping technical responsibility.
- Professional software development since 2004
- Production SaaS since 2013
- Laravel · React · Next.js
Next step
Tell us what your product needs next.
A short description of the product and the current challenge is enough to start a conversation with Ivan.