Solving complex business problems with custom software and AI

About Us

We are team of experienced software developers and business professionals on a mission to provide you with the best software solutions for your business.

  • Requirement analysis.
  • Defining architecture and required infrastructure.
  • Development and maintenance.
See Why People Love Us!

Services

Scale, optimize, and modernize your technology stack

API Development and Integration

  • Design and development of secure, scalable APIs.
  • Integration of third-party APIs into existing systems.
  • API versioning, documentation, and lifecycle management.
  • Custom middleware for seamless communication between services.

Cloud Solutions

  • Cloud architecture design and implementation (AWS, Azure, GCP).
  • Cloud migration and modernization of legacy systems.
  • DevOps and CI/CD pipeline implementation.
  • Multi-cloud and hybrid-cloud solutions.

Artificial Intelligence and Machine Learning

  • Development and deployment of AI-powered solutions.
  • Machine learning model training, optimization, and deployment.
  • Natural language processing (NLP) for chatbots and automation.
  • Predictive analytics and data-driven decision-making systems.

Enterprise Software and System Modernization

  • Custom enterprise application development for business processes.
  • Microservices-based architecture design for scalable solutions.
  • Modernization and reengineering of outdated systems.
  • Performance optimization and system integration.

Portfolio

Showcasing Our Successful Projects

Become Spry

Empowering Wellness with Custom Technology Solutions

Legacy App Migration

Transforming Legacy Systems with Expert Architectural Guidance

Patient Registration Portal

Streamlining Patient Onboarding with Innovative Technology

Team

Zvonko

Founder & CEO

Zvonko brings a strong technical background and a user-focused approach, making sure he understands a project from the user’s perspective before getting started. He prioritizes usability and actively seeks feedback to deliver the best results. With extensive experience across different software tools, he challenges traditional methods and explores innovative solutions. As a positive and supportive leader, he builds strong relationships, making him a valued colleague and friend.

Mladen

Principal Software Engineer

Dynamic and versatile front-end developer with expertise in React, Python (Django, Flask), and MERN stack. Combining front-end mastery with back-end proficiency, I deliver robust and scalable applications that seamlessly integrate user interfaces with powerful server-side functionality. A proactive problem-solver, I thrive in collaborative environments and am driven to deliver innovative solutions that exceed expectations.

Lado

Lead UI/UX Designer

Lado is a UI/UX designer specializing in user-centric digital solutions. With a bachelor's degree in graphic graphic design from the Academy of Applied Studies Polytechnic in Belgrade, Serbia, and two years of hands-on experience, he has mastered tools like Figma, Illustrator, Photoshop, and InDesign to deliver functional and aesthetically compelling designs.

Why us?

When it comes to building software that drives your business forward, you’ve got options: hire full-time employees or bring in expert consultant developers. While both have their place, partnering with seasoned consultants often delivers unmatched value—saving you time, money, and headaches. Here’s why choosing expert consultants could be the smartest move for your next project.

Expertise On Demand, No Learning Curve

Consultant software developers bring years of specialized experience to the table—often across industries, tools, and challenges. Unlike employees who might need time to ramp up or training to fill skill gaps, consultants hit the ground running. They’ve tackled projects like yours before, so you get top-tier solutions without the trial-and-error phase. Need a complex app built fast? Consultants deliver expertise, not experiments.

Cost Efficiency Without Compromise

Hiring full-time employees comes with a hefty price tag: salaries, benefits, taxes, office space, and ongoing training. Consultants, on the other hand, work on a project-by-project basis—you pay for results, not overhead. No long-term commitments, no hidden costs. You get premium development talent at a fraction of the expense, freeing up your budget for growth instead of payroll.

Flexibility to Scale Up or Down

Business needs shift—sometimes you need a full team, sometimes just a single expert. Consultants offer flexibility employees can’t match. Ramp up for a big launch, then scale back once it’s done, all without the hassle of hiring or layoffs. With consultants, your development capacity adapts to your timeline and goals, not the other way around.

Fresh Perspectives, Proven Results

In-house teams can get stuck in ruts, recycling familiar approaches. Expert consultants bring an outside lens—new ideas, cutting-edge techniques, and best practices honed across diverse projects. They’ve solved problems you might not even see coming, ensuring your software isn’t just functional but future-proof. Think of them as strategic partners, not just coders.

Speed Without Sacrificing Quality

Deadlines matter. Consultants are pros at delivering high-quality work fast because their reputation depends on it. Full-time employees, while valuable for long-term roles, might split focus across multiple responsibilities or lack the niche skills to accelerate a project. Consultants zero in on your needs, streamlining development so you hit the market sooner.

No HR Headaches

Recruiting, onboarding, and managing employees takes time and energy—resources better spent growing your business. With consultants, you skip the HR grind. They’re self-starters who integrate seamlessly into your workflow, often bringing their own tools and processes. You get the talent without the paperwork.

Access to a Broader Talent Pool

Hiring locally limits you to who’s nearby and willing to join full-time. Consultants break that barrier—many work remotely, giving you access to top developers worldwide. Whether it’s a blockchain guru or a UX wizard, you’re not stuck with who’s in your zip code. You get the best, period.

The Bottom Line

Hiring expert consultant software developers isn’t just about filling a gap—it’s about getting ahead. You gain agility, expertise, and efficiency without the long-term costs or risks of traditional employment. For businesses that need standout software without the bloat, consultants are the clear choice.

Ready to see the difference?

Let’s talk about how our expert developers can turn your vision into reality—faster, smarter, and better than you imagined.

Testimonials

Real Stories, Real Results – See What Our Clients Say!

Xin Wang

Senior Systems Analyst

Zvonko lead his team to work on one of the most complicated billing system in MMSD. The solution delivered was robust with enough flexibility to be extended in the future. Zvonko is very professional in knowledge transferring at the end of the contract. It was a great pleasure to work with him and I am looking forward to working with him again in the future.

Robert Caroll

Information Systems Manager

Zvonko has performed two engagements for our organization and we were and are extremely pleased with each result. He provided the Architectual guidance to migrate a legacy application into the windows/.net environment. He worked closely with our developers to make the application transitition a seemless one for us. For both engagements the final product has been supportable, extensible, and reliable. I highly recommend Zvonko for IT Application development services across a broad spectrum of requirements. He delivers.

Craig Kurtz

Entrepreneur

Zvonko led the development team that designed and built a complex ecommerce system for our company. Our product Insider Network provides text and mobile marketing for real estate agents. The system manages multiple integrated communications and has multiple inputs and outputs. Zvonko took the time to really understand our business and made many valuable recommendations that improved upon our basic system requirements. His input saved us time and money. Zvonko is also a great guy to work with. He is personable, professional, diligent and responsive to our changing needs. I would highly recommend him and hope to work with him again in the future.

George Buckbee

Head of Performance Solutions

I have worked with Zvonko for more than 10 years. He has worked on many projects, large and small, with our team. Zvonko possesses that very rare combination of deep technical skills and a very personable approach. He uses these skills to truly understand projects from the user's perspective before beginning work. Once he understands, he dives in, and then seeks feedback to make sure that he has the right result. Whether the customers are internal or external, you can be sure that the user experience is his main priority. Zvonko also uses his experience across many software tool sets and architectures to challenge the status quo and consider new approaches. He is a good team member with a positive attitude, and a good friend to those who are fortunate enough to work with him.

Jack Pasquill

Global Sales Manager

Zvonko is able to take on tough challenges and provide a workable solution in a timely manner. I respect his abilities, knowledge and the way he intereacts with teammates.

Free Consultation

Book today to start a new journey!

... or email us!

info@athossoft.com