Automated Mobile Build and Release Pipelines for Smart Building Apps on AWS

Executive Summary

Ficode transformed the mobile application delivery process for a UK-based smart-building platform by implementing secure, automated CI/CD pipelines for Flutter Android, Flutter iOS, and native Android applications. By replacing manual, machine-dependent builds with cloud-native automation on AWS, we improved deployment reliability, strengthened application security, accelerated release cycles, and enabled continuous mobile delivery across the entire application portfolio.

Client Overview

Our client is a UK-based smart-building technology provider delivering mobile applications for building occupants, facility managers, and room-level hardware. As the number of mobile applications increased, manual build and release processes created operational bottlenecks, inconsistent deployments, and security risks. The client required an AWS-based mobile DevOps solution capable of automating application builds, securing signing credentials, and streamlining app delivery across multiple platforms.

Business Challenges

Before the automated pipelines were in place, the manual model created several operational risks:

• App builds were tied to individual developer machines if the right machine or engineer was unavailable, a release could not proceed.
• Android app signing keys were stored locally, creating security exposure and making it impossible to produce authorised builds without a specific person’s involvement.
• The Flutter SDK version and Android SDK licence acceptance were manual setup steps builds that worked on one machine would sometimes fail on another.
• There was no consolidated view of which apps were building successfully and which had silent failures.
• One app the room-wall display used on tablets installed in building meeting rooms had been in a persistent failed build state with no clear visibility into the cause.

Ficode Solution

Flutter Android Builds:

The build environment installs the Flutter SDK at a pinned, reproducible version, resolves app dependencies, accepts Android SDK licences automatically, retrieves the signing keystore from secure cloud storage, and produces a signed, distributable app. The result is uploaded to versioned cloud storage for distribution.

Flutter iOS Builds:

The iOS pipeline follows the same pattern with platform-specific steps: provisioning profile retrieval, app archive and export, and IPA upload to cloud storage for distribution.

Native Android Builds:

Three native Android pipelines use Gradle to build signed apps and Fastlane to upload directly to the Google Play internal test track. A commit to the release branch produces a Play Store submission automatically.

Signing Security:

App signing keys are stored in encrypted cloud storage and retrieved at build time by the pipeline’s dedicated service account. Signing credentials are never stored in source code, never on developer machines during the automated pipeline flow, and never accessible to anyone without explicit cloud storage access.

Failing Pipeline Fix:

The room-wall tablet app – used on dedicated display hardware installed in building meeting rooms – had been in a persistent failed state. Investigation identified a version incompatibility between the pinned Flutter SDK in the build configuration and a dependency update in the app’s package file. Aligning the SDK version resolved the failure and restored the pipeline to full operation.

Implementation Process

• Discovery and assessment of the existing platform, service dependencies, and operational risks.
• Cloud architecture and workload design covering compute, routing, security, deployment, and data dependencies.
• Containerisation, infrastructure setup, pipeline alignment, and controlled deployment to the AWS environment.
• Validation of application behaviour, monitoring signals, rollback approach, and operational handover material.

Security & Scalability

• TLS-protected ingress through a controlled load-balancing layer.
• Workload separation between Linux and Windows services where required.
• IAM, security groups, and infrastructure as code controls support repeatable governance.
• Kubernetes scheduling, persistent storage, and cloud automation provide a scalable foundation for continued growth.

Results & Business Impact

3 Mobile Build Streams Automated:

Flutter Android, Flutter iOS, and native Android build flows were standardised, reducing manual release preparation by an estimated 60% to 70%.

100% Removal of Local Signing Dependency:

Signing keys moved away from developer machines into controlled cloud storage, reducing credential exposure and removing dependency on a single engineer workstation.

1-Day Testing Access After Release Commit:

Android builds can be delivered directly to the Google Play internal test track, reducing manual upload effort and helping QA teams access builds within the same release day.

50% Fewer Environment-Related Build Issues:

Pinned SDK versions and automated dependency resolution reduced build inconsistency caused by local machine differences, improving release confidence across the mobile suite.

1 Critical Room-Wall App Delivery Path Restored:

The meeting-room tablet application returned to a reliable delivery path, reducing manual workarounds for commercial building app updates.

Conclusion

The mobile pipeline foundation supports continued delivery improvements: build time optimisation, expanded test automation during the build phase, and TestFlight distribution for iOS internal testing. As the mobile app suite expands across new building types and user segments, the pipeline model scales by adding new pipeline instances without redesigning the build infrastructure.

About Ficode

Ficode is a cloud and software engineering partner helping smart-building, commercial real estate, and specialist technology businesses build reliable, scalable platforms on AWS. We combine deep technical delivery with business-focused thinking to help organisations move from infrastructure management to operational confidence. Visit ficode.com.