Technologies / C#

C# development services

We build C# applications for companies that already have
engineering teams and need more capacity, or companies
modernising older systems that have started to slow them down.

Most of our C# work sits in two places: B2B platforms with
complex integrations, and enterprise tools that have to keep
running while we change them.

OUR SERVICES

What we build with C#

Companies hire us for C# work for different reasons. Some need extra hands on an existing roadmap. Others have a specific build in mind. A few want us to take an aging internal system and make it usable again.

We handle all three. Here’s what that looks like in practice.

Custom C# development

We build web apps, internal tools, and backend services in C# for companies that need them to fit into an existing environment, not stand alone.

A recent example: an intranet portal with ADFS single sign-on for Windows users, SharePoint based document management, news, and user profiles. It plugs into the client’s existing identity setup so employees don’t get a separate login to remember.

Most of our custom C# work looks like this. Code that has to live inside someone’s existing infrastructure and behave itself.

Integration and migration

C# applications rarely live alone. They talk to an ERP, a CRM, a warehouse system, a payment provider, or all four. We build the connections and keep them stable.

Recent work: a cloud-based application synced in real time with the client’s ERP, so stock, orders, and customer data stayed consistent across both systems without nightly batch jobs.

We also handle migrations. Moving an on-premise C# application to the cloud, splitting a monolith into services, or porting from an older framework. The goal is the same in every case: nothing breaks on the way over.

C# in the cloud

We build C# applications that run on Azure and AWS, depending on what the client already uses. SaaS products, internal platforms, document-heavy systems, IoT backends.

One recent build manages product safety information for an industrial client. Documents are stored and processed on AWS. The C# layer handles the business logic, access control, and reporting.

We don’t push cloud as a default. If your application doesn’t need it, we’ll say so. When it does, we use the services that fit the workload, not the ones that look good in a case study.

golf booking web development platform software development by zendev software company

GREENFEE 365

Payment development solutions and SEO services

The software we built integrates with many systems to deliver the best-priced tee times for golf players.

BENEFITS

Why choose Zendev for C# development?

Proven results

Proven results, not just expertise. We built a mobile application for Cargotec that improved operational efficiency by 103%. We increased revenue by 33% for Hidroxa and conversion rates by 445% for Magnetlabbet.

94% client satisfaction

Last year’s internal survey: 94% of clients reported a positive experience, while 65% of them were extremely satisfied and said they’d recommend us.

Cultural fit

Cultural alignment isn’t a soft benefit. It’s why our clients keep extending engagements. Our developers work the same hours as Western European teams, communicate directly, and take ownership without being managed.

Flexibility and scalability

Scope shifts. Requirements evolve. We adapt quickly whether that means scaling the team up, handling a legacy system mid-project, or changing direction entirely.

First CV within 48 hours

You’ll have your first C# developer candidate to review within 48 hours of starting the process.

The tech

The C# stack behind our work

Our C# work runs on current .NET versions, so projects stay on supported runtimes and don’t accumulate upgrade debt before they ship.

WORK MODELS

Pick the model that fits your project

Staff augmentation

You have a team. You need specific skills. Our developers slot in and get to work, no restructuring required.

Dedicated team

You need a full team but want to stay in the driving seat. We build the team around your product owner and process.

Full responsibility

You have a product to build and no bandwidth to manage the process. We own it end-to-end and deliver.

PROCESS

Here is how we work together

Discovery

Before we talk about developers, we talk about the problem. What are you building, why, and what does success look like? That conversation shapes everything that follows.

Team assembly

We match developers to your stack, your industry, and your way of working, not just the job description.

Onboarding

Your new developers are introduced to the codebase, the team, and the process. Most are contributing within the first week.

Project kickoff

Clear scope, defined communication rhythm, direct access to the people doing the work. That’s how we start every engagement.

OUR LEADERSHIP TEAM

Talk before we propose

No discovery decks, no SDR call, no scripted pitch. Just a conversation about what you’re trying to build and whether we’re the right people to build it. Get in touch and let’s figure it out.

LinkedIn profile

Senad Šantić

Co-founder/CEO

LinkedIn profile

Nikola Mirković

Co-founder/ Co-CEO

LinkedIn profile

Haris Husejnovic

Growth Manager

FAQ

What people ask us before they start

Clients about us

Don’t take our word for it

software development services for golfing platform

We needed a tech partner who could help us scale Greenfee365 into the global marketplace, and Zendev exceeded our expectations.

Their team developed custom solutions that optimized our booking platform, resulting in faster load times and an improved user experience

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.

gothenburg familjehem logo

Given a very tight timeframe, we are satisfied with having a user-friendly app that we now hope to further develop and refine.

We are pleased with the collaboration with Zendev and our contact person Aida, who has been very available, helpful, and quick. Thank you!

Emil Eek

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

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.

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.

Zendev co-founder Nikola Mirkovic - enterprise software development partner for CTOs and IT leaders

Nikola Mirkovic • Co-founder / Co-CEO

Build your next digital product

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