Hire Windows App Developers You Can Trust

Keep your roadmap on schedule. We supply Windows engineers who know the difference between shipping a proof of concept and maintaining a business-critical desktop product. Expect people who proactively manage installers, packaging, and release trains.

Fill niche skill gaps instantly. Need deeper .NET experience, MVVM mastery, or help untangling legacy Win32 interop? Our specialists arrive ready with playbooks, not guesses.

Collaborate in real time. Our nearshore teams share US time zones, so your product owners still make the calls while we join standups, pair on code, and leave thoughtful pull-request reviews.

Less ramp-up, more delivery. We speak the language of secure SDLCs, FDA validation, air-gapped deployments, and regulated environments. That context shortens onboarding and reduces hand-holding.

Transparent engagement. Fixed monthly pricing, clear KPIs, and the option to scale roles up or down every sprint keep finance and engineering leaders aligned.

• C#/.NET 6/7/8, async/await, TPL, background services
• WPF, MVVM, XAML, UI automation, accessibility conformance
• UWP, WinUI 3, MAUI for cross-platform desktop experiences
• Legacy modernization: Win32, WinForms, VB6 migration
• SQL Server, Entity Framework, Dapper, caching strategies
• REST/gRPC APIs, SignalR, WebSockets, offline sync
• Quality leadership: test automation, performance profiling, code review facilitation

• Azure App Services, Functions, Service Bus, Identity, and deployment pipelines
• CI/CD with GitHub Actions, Azure DevOps, Jenkins, Octopus Deploy
• Installers and packaging: MSIX, MSIX Core, ClickOnce, WiX Toolset
• Interop: COM, Office add-ins, native P/Invoke and hardware integrations
• Security hardening, code signing, vulnerability management
• Product leadership: technical leads, solution architects, delivery managers
• QA engineers focused on Windows UI automation with Playwright and Appium

Client: HighSide – secure collaboration platform serving regulated industries.

HighSide needed to extend their Windows desktop client to support advanced encryption workflows while keeping a protected offline mode. They partnered with Siblings Software to integrate two senior Windows engineers and a QA lead into their internal team.

• Re-architected the sync engine to handle zero-trust policies without degrading UX.
• Introduced automated regression testing for installers across managed and unmanaged devices.
• Cut release cycle time by 35% and cleared a backlog of 47 security-related tickets in 10 weeks.

Read the full story in our HighSide case study to see how we balance compliance, velocity, and user satisfaction.

1. Discovery (days 1–3): clarify release goals, architecture, compliance constraints, and the seniority mix you need.
2. Match (days 4–7): interview 1–3 vetted engineers who have shipped comparable Windows products; you pick the team.
3. Onboard (week 2): align rituals, environments, branching, installer signing, and Definition of Done so we integrate seamlessly.
4. Deliver (week 3 onwards): sprint-based execution with measurable outcomes, code reviews, demos, and proactive risk flags.
5. Scale (ongoing): flex roles up or down, add QA automation or DevOps capacity, and tap into our solution architects when needed.

We stay transparent with weekly delivery summaries, velocity trends, and product health insights so stakeholders always have a clear view of progress.

Enterprise deployments

We manage MSIX and MSI packaging, group policy distribution, device management, and rollback strategies for managed fleets.

Legacy co-existence

We modernize WinForms and WPF codebases incrementally, keeping mission-critical features live while new UI rolls out.

Security & compliance

From SOC 2 to HIPAA, we build audit trails, encryption, and observability directly into the Windows experience.

• Desktop modernization: incrementally rewriting WinForms or WPF UI in WinUI 3 while keeping installers stable.
• Field service enablement: syncing offline data sets, hardware integrations, and telemetry dashboards for frontline teams.
• API-first refactors: exposing secure REST/gRPC endpoints so the Windows client plays nicely with web and mobile experiences.
• ISV security upgrades: building encryption, audit logs, and zero-trust sign-on into mature products under compliance pressure.

We also support hybrid initiatives—Windows desktop paired with web or mobile apps—by pulling talent from our API engineers and UX specialists. That means one partner orchestrating every piece.

When you need to clear a surge of customer commitments, launch a new module, or reduce operational risk, we plug in quickly and stay accountable for outcomes.

How do you vet Windows developers?

Every engineer goes through technical interviews led by our senior Windows architects, code exercises focused on MVVM and async patterns, and scenario-based evaluations covering deployment and support realities.

Can we start with a pilot sprint?

Yes. Many partners begin with a 4–6 week pilot to attack a specific backlog area. Once we align on the working model, we expand capacity with the same standards and reporting cadence.

What about support hours and maintenance?

We structure on-call rotations, release readiness checklists, and knowledge transfer so your internal team always has coverage—even after we transition ownership.

How do you integrate with our security practices?

We follow your identity management, VPN, and secure coding guidelines. Our team is used to SOC 2, HIPAA, and ISO 27001 controls, and we document every change for compliance audits.