Services / SaaS development

Custom SaaS development for founders and product teams

Avidnote, our own product, has 70,000 researchers using it across 100 universities including Princeton and Cornell. Linkbound hit $25K ARR in its first week. Robinize was Product Hunt's #1 product of the day.

We've built SaaS that pays its own bills, and we apply the same playbook to client work: Meela Health raised €2.6M on the matching algorithm we built for them.

avidnote saas development of an AI tool for researchers by zendev saas development company

AVIDNOTE

SaaS Development of an AI tool for researchers

Recommended by recognized universities on their websites, including Princeton University and Cornell University.

WHAT WE BUILD

Kinds of SaaS we ship

SaaS isn’t one thing. Building a vertical product for accountants is nothing like building a multi-sided marketplace, and an AI-native tool ships differently from a B2B platform with enterprise integrations. Here’s where we have the deepest track record.

cpu

AI-native SaaS

Products where AI is the product, not a feature bolted on. Avidnote uses AI to help researchers analyze papers and synthesize data, with 70,000 users across Princeton, Cornell, and 100 other universities. Robinize uses AI to optimize content for SEO and was Product Hunt’s #1 product of the day. Linkbound applies AI to LinkedIn engagement data and hit $25K ARR in its first week. We’ve shipped AI-native SaaS across research, marketing, and sales.

Algorithm-driven platforms

SaaS where the algorithm is the product. Meela Health raised €2.6M in seed funding on the therapist-patient matching algorithm we built. Marketplaces, matching platforms, and two-sided products live or die on the logic that pairs supply and demand. We build the algorithms, the rating and review systems, the booking and payment flows, and the analytics that prove the matching works.

briefcase

B2B SaaS with enterprise integrations

SaaS designed to be sold into companies that already have stacks. Salesforce, HubSpot, SAP, NetSuite, Slack, Microsoft 365. We’ve built B2B SaaS that integrates into existing customer environments through APIs, webhooks, and SSO, with the audit trails and admin controls enterprise buyers ask for. SOC 2 readiness, role-based access, and data residency aren’t afterthoughts. They’re scoped from week one.

layers

Vertical SaaS for specific industries

Industry-specific SaaS where the workflows are too specialized. We’ve co-owned and grown Hidroxa, a SaaS for product lifecycle management in fashion, by 33% in revenue after the platform rebuild. We’ve built SaaS for property management, foster care, sports performance (NDA), and industrial tooling. We build software that maps to how the industry actually operates instead of forcing your customers into a generic tool.

A therapy matching app, showcasing the Home screen, a matching quiz, and therapist profile image, highlighting how we work to connect users with mental health services. Software development of the online therapy app done by zendev.
meela health software development provider

MVP that secured €2.6 million in a seed round

Research-based therapy algorithm software. 25X more effective matching, trusted by 300+ therapists.

HOW WE APPROACH SAAS

The SaaS playbook we use on every build

1

We’ve run our own SaaS, so we know what kills them

Most SaaS projects fail because of the things nobody discusses at kickoff. Churn from the wrong onboarding flow. Pricing that punishes power users. Activation gaps between signup and the moment users feel the product working. We’ve felt all of these inside Avidnote, Linkbound, and Robinize. When we tell you a feature should wait or a pricing model won’t survive scale, it’s because we’ve shipped the wrong version ourselves and rebuilt it.

2

We design for paying users from day one

User numbers without revenue are vanity. We build the parts most SaaS projects skip until later: pricing pages that convert, billing that doesn’t break at scale, role-based access for team plans, and the analytics that show you which features drive paid conversion. Linkbound hit $25K ARR in its first week because the paid flow was built into the MVP, not bolted on after launch.

3

Build, measure, learn before scaling

We ship a minimum viable version, get it in front of paying users, then build what they ask for instead of what we assumed. Avidnote shipped without half the AI features it has today. Those features came after we watched 70,000 researchers use the product and saw what they actually needed. Most SaaS budgets get burned on features users never adopt. We design the cycle so yours doesn’t.

WHAT CLIENTS SAY

Five-year average client relationships. Here’s why.

client quote

The PDT app was our first big step into the digital world using apps and Cloud solutions. By implementing this app, we could, with one tool, solve multiple issues that we had with our delivery process of new machines to our customers. The app helps us improve the machine quality, shorten our lead time and increase our cash flow.

Emil Eek

We struggled with outdated AutoCAD renders and no good way to manage large-scale 3D scans. Zendev solved both.

ecommerce development for manufacturing

What I appreciated most in our partnership was the way I could explain our business to you and how we could develop the online store to fit our needs.

The 110% commitment we received from Zendev was truly remarkable.

natali suo

Zendev understood our vision of connecting women with the right therapists. They improved the platform, were easy to collaborate with, and meeting them in person built real trust.

Kotada Yonus

Zendev really transformed our entire tech situation in the company. We had this big backend system that was overwhelming us, but now it’s running beautifully.

jimmy eriksson hidroxa

Zendev provided the solution we needed. Implementing Progressive Web App (PWA) significantly improved our site speed, Google rankings, and conversion rates. The new platform has driven a 33% increase in revenue and 17% more users.

FAQ

The questions we get on every first SaaS call

Zendev co-founder Senad Šantić - nearshore software development consultation for CTOs

Senad šantić • Co-founder / Co-CEO

Reliable code
Real result

Project consulting when you need direction
Staff augmentation when you know the way