Software Outsourcing Company

As a software outsourcing company, we help CTOs deliver roadmap work faster - without sacrificing code quality or ownership. Need extra capacity without months of hiring? Scale your development. When you outsource software development to Selleo, you get an external development team working in your stack, repo, and release cadence. Our outsourcing software development services are built around measurable iterations - clear scope, reviewed pull requests, and documentation that keeps key decisions in your hands.

Why work with us?

  • English-speaking, co-located team for fast feedback and fewer handoff delays.
  • Senior engineers to support architecture decisions, reviews, and technical alignment.
  • From discovery to delivery to support—one partner accountable across the lifecycle.
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Global brands and enterprise institutions benefit from digital products we've developed:
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How we can help a client who needs software outsourcing services

As your outsourcing partner, we make the outsourcing process predictable: pilot-friendly scope, transparent progress, direct communication and add senior capacity fast without a long hiring cycle. If you need an end-to-end build, see custom software development services from our software development outsourcing company.

We offer:

  • Technical alignment: integration with your stack, architecture risks, and security basics.
  • Delivery setup: onboarding, repos, CI/CD expectations, definition of done, code review & quality gates.
  • Iterative delivery: delivery cadence (sprints), demos, and measurable outcomes with documented decisions.

These proof points reflect delivery volume, longevity, and compliance maturity. If you want to validate fit first, start with a short, risk-free trial.

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Free for 2 weeks.

No risk. Just results. Get a feel for our process, speed, and quality — work with our developers for a trial sprint and see why global companies choose Selleo.

Key features and benefits of software outsourcing services at our company

Access to Experienced Team

  • Senior expertise with architecture review to prevent avoidable tech debt.
  • Add senior capacity fast; keep decisions documented and reviewable.
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Cost Efficiency

  • Spend on delivery, not coordination across multiple vendors.
  • Predictable cadence reduces rework and stabilizes forecasting.
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Focus on Core Business

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TRUST OUR EXPERIENCE

Achieve business goals faster!

Do you need support with software development or optimizing IT processes? Take advantage of our consultations to gain access to experts in cutting-edge technologies who can help accelerate your project and reduce costs.

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Our Expertise

Our case studies

LMS

A micro-learning app for corporations offering scenario-based spaced learning

We have developed a unique admin section while rebuilding existing elements and designs. We have implemented various question types like video, presentation, or fill-in-the-gap, each of them with its own complexities which had to be managed carefully so the app can be easily extended in the future.
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Collaborative platform development in any context

From outsourcing services to custom software and more. We provide the technology and expertise to elevate your team’s potential.

Business / Corporate Training Software

Business / Corporate Training Software

Fintech Software

Fintech Software

Healthcare Software

Healthcare Software

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Go through various industries and learn the hidden gems revealed by our experts. Those insights may help you make the right business decision, especially nowadays when specific choices can change your position on the market!

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Interested in outsourcing services?

Get a free quote for your project. Reach out today!

Dawid Poslinski

Dawid Pośliński

CEO
Dariusz Wylon

Dariusz Wylon

CBO
  • Benefit from our expertise and planning

  • Hire developers at competitive rates

  • Leverage our elearning-centric approach

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Client Value & Trust

Learn how entrepreneurs, business and technology leaders who are after software driven innovation are collaborating with our high-performing teams.

Steve Cornwell
Steve Cornwell
CEO, Northpass, USA

Selleo has proved to be a professional and competent web and mobile software development team, they were apt at understanding our wishes and extremely service minded. I highly endorse whole Selleo team.

faq

A software outsourcing company provides extra delivery capacity when your in house team can’t cover the roadmap without long hiring cycles. If you need faster execution while keeping code ownership and quality, it’s often the most practical way to scale.

A strong software development outsourcing company doesn’t just “add people” - it integrates into your stack, repo, and release cadence, then drives software delivery through measurable iterations, reviews, and documentation. That reduces handoffs and keeps key decisions on your side.

Our outsourcing software development services focus on: technical alignment (stack, architecture risks, security basics), delivery setup (repos, CI/CD, Definition of Done), and iterative delivery (sprints, demos, documented outcomes). This makes the whole outsourcing process predictable.

Yes. When you outsource software development, the external team works directly in your repo and tooling, aligning with your development process and quality gates - especially important when building on existing software.

We start with a pilot-friendly project scope and turn it into a clear, reviewable plan through documented decisions, sprint goals, and demos. That structure helps you keep control over priorities and reduces scope drift.

Yes - project management is built into delivery via sprint cadence, transparent progress, and direct communication. Depending on the engagement, you’ll work with a PM/lead who helps keep execution aligned with business goals and delivery signals.

We support practical outsourcing models, including dedicated team arrangements for continuous delivery and scalable squads. If you need a more stable long-term setup, we can operate like a dedicated development center integrated with your org and engineering standards.

A key benefit of development outsourcing is adding senior capacity quickly - without months of recruitment. We can expand an outsourcing team in a controlled way (so quality and onboarding don’t suffer), which is ideal for rapid team scaling.

The model is senior-led: senior developers support architecture decisions, reviews, and technical alignment. This specialized expertise helps prevent avoidable tech debt and keeps delivery stable.

Quality is enforced via reviewed PRs, Definition of Done, and quality gates - so increments are release-ready. This approach improves reliability and reduces rework across software development services.

We begin by evaluating your current tools, workflows, and key documents, then define access levels and a lightweight training plan for the incoming staff. The new team members join your ceremonies and repository flow so the development process stays consistent and the work remains focused on your backlog. This approach supports quick onboarding while protecting continuity across your software development pipeline.

We keep estimates tied to measurable increments: what will be delivered per sprint, what “done” means, and how progress will be validated. That clarity helps manage development costs and supports a realistic, detailed project plan.

Yes - our work includes custom software development where the goal is a maintainable product that fits your stack, domain constraints, and release cadence. That’s how we deliver unique software solutions and long-term ownership - not throwaway code.

Yes. We deliver web development and mobile app development, including web app development and broader app development across mobile and web applications - all shipped in small, reviewable increments.

Yes - regulated environments need traceability, stability, and security basics. We support system integration that respects legacy constraints while delivering iteratively, which is essential for enterprise solutions in fintech and healthcare.

Look for an outsourcing partner that can align technically (your stack and repo), run a predictable delivery cadence (sprints, demos), and prove discipline in reviews and documentation. The best software outsourcing services keep ownership with you and reduce coordination overhead - supporting business growth and smoother delivery.