We’re at a strategic crossroads for our mobile process automation initiatives. Currently evaluating whether to continue with OutSystems low-code approach vs building custom native mobile apps, and whether to outsource or keep development in-house.
Our context: 15 legacy systems that need mobile process automation, team of 8 developers (3 experienced with OutSystems, 5 traditional mobile devs). We’ve built 4 mobile workflow apps in OutSystems over 18 months with good results, but hitting scalability questions as requirements grow more complex.
The low-code rapid prototyping has been excellent for getting MVPs to users quickly. But we’re now facing custom integrations with older legacy systems where OutSystems connectors don’t exist, and performance concerns on complex approval workflows with large datasets. Our traditional mobile team argues they could build more flexible solutions, but timeline would be 3-4x longer.
Outsourcing is also on the table - OutSystems partners promise faster delivery, but we’d lose internal capability. I’m interested in hearing real-world experiences from others who’ve made similar choices. What were the long-term implications?
Regarding outsourcing: we made that mistake. Hired an OutSystems partner for 6 mobile apps, delivered fast initially but left us with technical debt and zero internal knowledge. When we needed changes 8 months later, we were locked into their hourly rates. Eventually rebuilt 3 of the apps in-house. If you outsource, insist on knowledge transfer, pair programming with your team, and maintain architectural control. Don’t just hand over requirements and expect sustainable solutions. The custom native app flexibility argument is often overblown - OutSystems extensibility through plugins and custom components handles most edge cases if your team knows the platform deeply.
From a business perspective, the rapid prototyping advantage of low-code is transformative but often misunderstood. It’s not just about speed to first deployment - it’s about iteration speed. We’ve gone through 6-8 major revisions of our mobile approval workflows based on user feedback. With OutSystems, each iteration is 2-3 weeks. Custom native would be 8-12 weeks per iteration. Over 18 months, that difference compounds dramatically. However, this only works if you maintain in-house OutSystems expertise. Outsourcing kills iteration speed because every change requires contracts, specifications, and handoffs.
The low-code vs custom debate isn’t binary - it’s about portfolio strategy. We use OutSystems for 70% of our mobile process automation (standard workflows, forms, approvals) and custom native for the remaining 30% (complex UI, offline-first, performance-critical). The key is integration architecture. Our custom apps consume the same APIs as OutSystems apps, so the backend process automation layer is unified. This hybrid approach gives us rapid prototyping benefits while maintaining flexibility for complex cases. Don’t force everything into one paradigm.
Lisa’s hybrid approach resonates. Raj, your outsourcing experience is exactly what I’m worried about. How did you structure the knowledge transfer when you did outsource? And for legacy system integration specifically - did you find OutSystems REST/SOAP connectors sufficient, or did you need custom integration components?
After seeing this discussion evolve, here’s my comprehensive take on the four key tradeoffs:
Low-Code Rapid Prototyping: OutSystems excels at getting mobile workflow apps to users in weeks, not months. The visual development and built-in mobile patterns accelerate MVPs dramatically. However, this advantage diminishes as complexity grows. Use low-code for 70-80% of process automation needs where requirements are relatively standard.
Custom Native App Flexibility: Essential for specific scenarios - complex offline synchronization, performance-critical operations with large datasets, highly custom UI/UX that doesn’t fit mobile patterns, or deep device integration (advanced camera, bluetooth, sensors). Don’t rebuild standard workflows in native just because you can. The flexibility comes at 3-4x development cost and ongoing maintenance burden.
Integration with Legacy Systems: This is where architecture matters most. Build a proper integration layer (middleware/API gateway) that abstracts legacy complexity. Both OutSystems and custom native apps should consume standardized APIs, not directly integrate with legacy protocols. OutSystems REST connectors work fine when you have clean APIs. For proprietary protocols, build custom extensions or middleware - this is in-house work because outsourced partners lack your legacy system knowledge.
Outsourcing vs In-House Tradeoffs: Outsource for temporary capacity or non-core applications only. Never outsource platform expertise or core process automation. The short-term speed gain becomes long-term dependency. Your team of 8 is sufficient - focus on building hybrid capability. Have your OutSystems developers learn custom plugin development, and your native developers learn OutSystems extensibility. This creates a unified team that can make pragmatic tool choices per project.
Recommended Strategy: Maintain OutSystems as your primary mobile process automation platform with in-house expertise. Build custom native apps selectively for the 20-30% of use cases where low-code constraints are genuine blockers, not just preferences. Create a shared integration architecture so both approaches coexist. Avoid the false choice of “all low-code” or “all custom” - successful enterprises use both strategically based on specific project requirements, not ideological platform preferences.
Michael, for knowledge transfer: we required the outsourced team to work on-site 40% of time, mandatory code reviews with our developers, and documentation in our wiki (not theirs). Still wasn’t enough. The real learning happened when we maintained their code for 6 months. For your team of 8 (3 OutSystems, 5 native), I’d recommend: keep OutSystems in-house for core process automation, use your native devs for custom components and plugins that extend OutSystems where needed. This cross-trains both groups and builds internal capability. Outsource only non-core apps or temporary capacity needs, never your platform expertise.