01
Product & MVP development
From ideation through launch, we help you shape ideas into market-ready products with clear roadmaps, maintainable architecture, and hands-on implementation—from IoT apps to e-commerce platforms.
Welin
Custom software for growing businesses
WelinEU OÜ helps startups and SMEs go from idea to production—products, integrations, and operations software—with a four-partner team focused on delivery quality and value.
Teams we have worked with
What we build
View all solutionsCore areas where we partner with clients—details and process on the Solutions page.
02
Payment & platform integrations
We build platforms that connect your business to external providers and systems, with robust backend logic, intuitive frontends, and dashboards so you can operate across regions and payment networks.
03
Operations & inventory software
Custom systems for stock, workflows, and compliance—such as inventory management and laboratory information systems—so teams can track operations, automate routine work, and report with confidence.
04
Technical leadership & team building
We align engineering with business goals: roadmaps, prioritization, high-performing teams, and delivery leadership when you need senior expertise without enterprise-level overhead.
How we use AI
How this fits our workAI is how we work on the software we already build—products, integrations, operations systems, and technical leadership—not a separate offer.
01
Models for a specific task
On some projects we create or adapt a model for one job, then integrate it into the product so it follows that project’s data, constraints, and outcome.
02
Faster delivery, higher quality
We use AI through discovery, design, build, and review so repetitive work shrinks and senior time stays on architecture, decisions, and testing.
Featured work
Payment platform integrator
E-mobility
A payment platform that integrates multiple providers across three continents. Robust backend logic and an intuitive frontend plug into existing systems, while a company dashboard provides real-time tracking of transaction status so finance teams stay in control.
- Multi-provider payment integration across three continents.
- Backend orchestration with an operator-facing frontend and finance dashboard.
“Working with Welin has been an outstanding experience. Their ability to deliver innovative technical solutions while maintaining a strong focus on strategy and team cohesion has been transformative for our projects. Welin's expertise was pivotal in successfully navigating multiple products and initiatives. Their technical guidance and leadership were instrumental in developing high-quality solutions and the on-time delivery of a payment terminal to the market. Welin also excels at setting realistic roadmaps, prioritizing tasks, and structuring high-performing teams. They foster a collaborative and motivated environment, ensuring every team member contributes their best to achieving project goals. Their foresight, adaptability, and commitment to delivering excellence make them a trusted partner in driving success. I highly recommend Welin to any organization seeking strategic and technical leadership to bring innovative projects to life.”
Why Welin
Our pillarsQuality
We ship software that meets agreed scope and timeline, with enough flexibility to adapt as your business changes.
Solution-oriented
We do not sell technology for its own sake. We choose tools and architecture to solve your business problem.
Experienced
Our partners cover the full delivery cycle: planning, implementation, testing, release, and improvement.
Price
We offer strong delivery at a lower cost than building equivalent capacity in-house for many SMEs and startups.
What people say
“Their team demonstrated exceptional leadership and technical expertise in transforming our engineering processes. From redesigning development teams to aligning technical strategies with business objectives, Welin’s approach ensured we achieved all our milestones effectively. The insights and dedication brought by their team not only improved our systems but also contributed significantly to our overall success. Welin is a true partner in innovation and growth, and we highly recommend them to any organization seeking excellence in engineering and leadership solutions.”
Jose
Chief Technology Officer · E-mobility
“Partnering with Welin was a game-changer for SmartFarming. From the outset, their expertise in IoT and product development stood out, helping us turn an idea into a viable, market-ready product. Welin's team guided us through every step of the journey—crafting a clear roadmap, providing valuable technical insights, and ensuring we maintained a sharp focus on building a product that truly meets user needs. Their ability to combine strategic vision with hands-on implementation was invaluable to our success. If you're looking for a partner who understands innovation and can execute with precision, I wholeheartedly recommend Welin.”
Tomas
Co-Founder · IoT food
Welin at a glance
A quick snapshot of the team and track record behind Welin.
- 40+
- Years of combined partner experience
- 4
- Partners leading delivery
- 7
- Years of collaboration before Welin
- 2
- Continents our partners have worked across
Latest insights
View insights
Apr 28, 2025
The True Cost of Bad Software Architecture
When a product is growing, bad architecture isn’t just a technical problem—it’s a business problem. You might not feel it immediately.
Apr 18, 2025
Your Codebase Should Grow With Your Business
Too often, startups and growing companies move fast—but build code that can't keep up. The result? Features take longer, bugs pile up, and scaling becomes painful.
Apr 7, 2025
SME Phase: Stay Competitive, Scale Sustainably
As your business grows, so does the complexity of your software—and the risk of slowing down. In the SME Phase, you’re no longer just building features.
Let's talk about your software
Whether you are shaping an idea, launching an MVP, or scaling an existing product, we are ready to help you take the next step. We reply within one business day.