Creating
software for your
product vision

Whether you're shaping a new MVP or scaling an existing product, we blend product strategy, thoughtful design, and strong engineering to help you build with confidence, speed, and clarity.

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100+

Talented People

We’re a team of 100+ developers, designers, and tech leads — ready to turn complex ideas into scalable digital solutions.

4.7/5

Rated on Clutch

Our clients give us a 4.7/5 on Clutch — praising our quality, communication, and proactive approach.

4.5

Avg Years of Client Partnership

Our clients choose to stay with us for years, building lasting partnerships founded on trust and shared success.

2005

Founded in Poland

Since 2005, we’ve been crafting custom software for clients around the globe — proudly headquartered in Poland.

Why Selleo

Do you need a thinking partner
or just typing hands?

The biggest cost in software development is building things nobody needs or that need rewriting in six months. We reject the "ticket factory" model. We challenge assumptions, find logic gaps, and advise on scalable solutions—before you spend money on them.

Business-First Approach: We build to achieve your business goals, not just to close Jira tickets.
Proactive Ownership: We challenge assumptions and suggest better solutions to prevent costly mistakes later.
Direct Senior Access: Work directly with autonomous experts who solve problems instead of waiting for instructions.

How We Work

Built to match your goals, ready to scale with your product.

Dedicated Experts to Strengthen Your Team

Scale your capacity with experienced developers, designers, and product specialists who integrate smoothly with your workflow. Founders get momentum, PMs get reliable, organised delivery that reduces stress instead of adding more.

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Full-Cycle Product Development

From discovery and scoping to design, development, testing, and launch, we handle the entire product cycle. Founders gain a partner who moves fast and adapts quickly. PMs get structure, transparency, and predictable execution every step of the way.

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Rapid Prototyping for Validation

Turn your idea into a clear, testable prototype, perfect for validating assumptions, user testing, or securing early support. Founders get clarity and speed; PMs get well-defined scope and smoother planning for what comes next.

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Try our developers.
Free for 2 weeks.

No risk. Just results. Test how our team works with your process, roadmap, and product vision.Founders can validate momentum and product value early, while PMs get transparency, structure, and confidence that deadlines stay on track.

Artificial Intelligence

AI Integration that Drives Real Product Results.

We help founders and project managers add AI features that improve the product, accelerate workflows, and create real user value. From early prototypes to full-scale implementations, we ensure smooth delivery, clear process, and measurable outcomes that move your roadmap forward.

AI Integration
DESIGN THAT DRIVES BUSINESS

UI/UX That Turns Ideas Into Engaging Products

UX Research Process

Great software is more than code – it’s the experience.

Our designers craft intuitive, user-friendly interfaces that help your product stand out, boost engagement and win your users’ trust.

  • We start by exploring user needs, pain points, and market context through interviews, surveys, and analytics. This ensures every design decision is grounded in real insights.

  • Creating clear, low-fidelity screen layouts that map out the structure, navigation, and functionality before investing in visuals.

  • Interactive prototypes allow us to simulate real user flows, test ideas early, and refine based on feedback before development begins.

  • Delivering polished, visually engaging interfaces that match your brand and delight your users, while keeping usability at the core.

  • Observing how users interact with prototypes or finished designs to identify barriers and optimize for clarity, efficiency, and engagement.

  • We design inclusively, following WCAG guidelines to make products accessible to people with diverse abilities, ensuring no one is left out.

Experts in EdTech, HRTech & SaaS

The Product Team
That Feels Like Your Own

From MVPs to full-scale platforms – our product teams design, build and grow software that makes an impact.

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RECOGNITION & EXPERTISE

Validated by Industry.
Trusted by Clients.

We pair coding craftsmanship with agile expertise and client trust — backed by real certifications and awards.

Business Excellence

Awarded Forbes Diamonds 2025 for consistent growth and business excellence.

Award
Award

Client Trust & Recognition

Clutch awards highlight our proven track record in delivering value and building strong client partnerships.

Award
Award

Certified Engineering

Our team holds key certifications in software testing and cloud architecture to guarantee reliability and performance.

Award
Award

Agile Leadership

Scrum-certified professionals ensure structured yet flexible processes tailored to product growth and team dynamics.

Award
Award
Contact us

Share your goals. We’ll build the solution together.

We collaborate with founders who need speed and PMs who need control, blending product thinking, thoughtful design, and dependable engineering.

Start a conversation, and let’s shape a product that grows with your business.

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INSIGHTS & TRENDS

Smart Reads
for Smarter Products

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Creating
software for
your LMS

From custom LMS platforms to learning portals and competency-based systems — we help HR and L&D teams build scalable digital learning experiences.

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Why Selleo

For HR Leaders

Transforming Learning

Crafting LMS and e-learning solutions that help HR teams scale development, accelerate onboarding, and improve performance at every level.

For nearly 20 years, we’ve been helping organizations turn learning initiatives into measurable business outcomes. From custom LMS platforms to development portals and competency-based training systems, we build solutions that boost engagement, reduce training costs, and stand the test of time.

OUR IN-HOUSE LMS

Transform Learning
Boost Performance.

Delivered as
Open Source
Saas
Custom-built
- your choice

Grow with a Custom LMS Designed for HR and L&D.

Our LMS is built for HR teams that need to centralize learning, eliminate manual processes, and ensure consistent, up-to-date training across departments and locations.
From digital onboarding to automated compliance reminders and skill-tracking dashboards, everything works together to free your team’s time

See how it works

Contact us

Tell us your challenge.

We’ll design the learning solution that solves it.

We build LMS and HR technology that fits your organization. Share what you’re working on, and we’ll help you move faster, automate more, and deliver learning that truly works.

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Talks & Ideas

Expert Talks
for Learning Innovators

Explore conversations on AI-powered learning, adaptive training systems, next-generation LMS platforms, and the latest trends in corporate learning. Designed for HR and L&D leaders driving digital transformation.

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Digital transformation academy lms

Identifying Key Features for LMS Platforms that Make Them Grow

Digital transformation academy lms

How to Validate Your SaaS Platform Idea

Digital transformation academy lms

Company B’s Growth Hack: The LMS Move That Changed Everything

Digital transformation academy HRM

Is Your Employee Training Really Working?

Artificial Intelligence

AI That Transforms Learning and HR Efficiency.

We integrate AI into your LMS and HR tools to automate onboarding, personalize learning paths, and free your team from repetitive, manual work. From AI-driven assessments to employee skill insights, our solutions help HR make faster, smarter decisions with measurable impact.

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Creating
software for
complex systems

From startups to global scaleups, we design, engineer, and scale reliable digital products built on clean architecture, robust infrastructure, and long-term maintainability.

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Why Selleo

For Tech Leaders

Building Scalable Products

Crafting high-performance software solutions with the right mix of architecture, engineering, and strategy.

For nearly 20 years, we’ve been helping CTOs transform complex ideas into robust systems. From cloud-native platforms to enterprise integrations and distributed architectures, our expertise lies in delivering solutions engineered to scale, operate reliably, and evolve with your technology roadmap.

Artificial Intelligence

AI Integration that Scales with Your Architecture.

We design and implement production-ready AI systems that enhance performance, automate workflows, and integrate seamlessly with your existing infrastructure. From model deployment and vector databases to MLOps pipelines, monitoring, and cost optimization, our AI engineering expertise helps CTOs innovate with confidence.

Discover AI for HR & L&D
How We Work

Built to fit your tech, engineered to scale

Dedicated Engineers to Strengthen Your Team

Scale your engineering capacity with experienced backend, frontend, DevOps, QA, data, and AI specialists who integrate seamlessly with your in-house team, aligned with your tech stack, workflows, and delivery standards.

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End-to-End Engineering for Complex Systems

From architecture design and technical discovery to development, testing, DevOps, and observability, we handle the entire engineering lifecycle. We combine strategic technical leadership with hands-on execution to build robust, secure, and maintainable systems.

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Rapid Prototyping for Technical Validation

Quickly turn concepts into functional prototypes designed for technical feasibility checks, architecture validation, user testing, and stakeholder alignment. Ideal for de-risking decisions before committing to full-scale development.

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Try our developers.
Free for 2 weeks.

No contracts, no commitments, just real engineering work.Evaluate our developers’ code quality, communication, architectural thinking, and delivery speed during a trial sprint. Use the 2-week trial before making any decisions.

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Share your vision.
We’ll build the architecture behind it.

We help technology teams design and deliver scalable, secure, and well-engineered systems.

Whether you're modernizing legacy infrastructure, extending your platform, integrating new services, or preparing for scale, we partner with CTOs to build solutions that perform reliably and evolve with your roadmap.

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