--- title: "CI/CD Modernization" description: "Replace brittle pipelines with faster, observable delivery workflows built for agent-speed engineering." url: https://www.callstack.com/services/ci-cd-modernization updated: 2026-11-09T15:59:24.365Z --- # CI/CD Modernization Replace brittle pipelines with faster, observable delivery workflows built for agent-speed engineering. _[Expert Engineering](/ai-native-engineering) › [Enterprise Infrastructure](/capabilities/self-hosted-ci-cd-infrastructure)_ **Pipelines built for how you ship now** Pipelines designed years ago now gate agent-speed output. We rebuild CI/CD into fast, observable workflows - modern runners, real caching, clear signals - sized for today's delivery demands. ## Enterprise Infrastructure - ISO 27001 certified - 100+ Enterprise projects delivered - React Foundation Founding Member · 300+ commits to React Native · Contributing since 2016 - Industry runs on our tooling · 50M+ OSS downloads / month - 10 min From code change to mini-app release - 60 → 10min Faster builds after replacing Jenkins with EAS ## What you get: From brittle to boring, in the good way. - **Pipeline audit and redesign** Bottlenecks, flakes, and dead steps mapped, with a target architecture and expected gains. - **Modern runner setup** Right-sized runners for JavaScript and native builds, hosted or self-hosted. - **Caching done properly** Dependency, build, and test caches that actually hit. - **Observable workflows** Timing, failure, and queue metrics per stage, so slowdowns are visible before they hurt. - **Agent-ready hooks** Pipelines structured so QA and automation agents plug in cleanly. - **Migration without downtime** Old and new pipelines run in parallel until the numbers prove the switch. ## How we work together: Improve the system without disrupting delivery. ### Extend your team (1 week) Our senior engineers join your team to ship features, guide technical decisions, and strengthen delivery. - Your roadmap and workflow - Expertise shared as we work - Flexible timezone coverage ### Deliver a project (1-12 months) We take agreed work from technical planning to release, with clear responsibilities and progress you can see. - 3 Callstack engineers ship like 6 - Impact visible before sprint two - End-to-end delivery ### Solve specific challenge (as needed) We address a performance, migration, or infrastructure challenge, or run training around your team’s needs. - Focused reviews or implementation - Knowledge your team keeps - Outcomes guaranteed with contract ## What shipping at AI speed looks like. - [Cutting Mobile Build Times by Up to 79% for a Southeast Asian Bank](/case-studies/cutting-mobile-build-times-by-up-to-79-for-a-southeast-asian-bank): 2.4× faster iOS cache-hit builds on average - [Accelerating Teamworks' Mobile Delivery With Re.Pack and Module Federation](/case-studies/accelerating-teamworks-mobile-delivery-with-re-pack-and-module-federation): 10 min from code change to mini-app release - [Migrating a Legacy React Native App to Expo for Faster Builds and Simplified Releases](/case-studies/migrating-a-legacy-react-native-app-to-expo-for-faster-builds-and-simplified-releases): 6x faster builds after replacing Jenkins with EAS - [Building Scalable Observability for a High-Growth React Native App](/case-studies/building-scalable-observability-for-a-high-growth-react-native-app): 3→1 analytics systems unified into a single interface **Make CI boring again.** Faster feedback, fewer mysteries, and a pipeline ready for agents. [Book a call](/contact) > We had been struggling with React Native application performance until we met Callstack. > > — Huỳnh Chí Hùng, Associate Director, MOMO We’ll connect you with the right expert within 24 hours. ## Let’s find the right path for your product. **Which CI platforms do you work with?** GitHub Actions, GitLab CI, Jenkins, Bitrise, CircleCI, and self-hosted stacks. Modernization often means restructuring on your current platform, not switching vendors. **What speed gains are realistic?** Depends on the starting point. Proper caching and parallelization commonly cut pipeline times by half or more; the audit gives you a number before you commit. **Do we have to leave our current vendor?** No. We optimize in place where the platform allows it and recommend a move only when the economics or constraints demand one. **Can you fix mobile-specific pain like signing and macOS builds?** Yes. Code signing, provisioning, and Apple silicon build performance are standard parts of the redesign - they are usually where the worst minutes hide. **How long does modernization take?** Weeks, staged. The highest-impact fixes land first, and delivery never stops while the pipeline changes underneath. **Do you operate the result or hand it over?** Handover by default, with runbooks and optional automation agents. It is your infrastructure; we make it maintainable. ## Open source - [React Native Community CLI](https://github.com/react-native-community/cli): Command line tools to help you build React Native apps - [Re.Pack](https://re-pack.dev/): A webpack-based toolkit to build your React Native application with full support of webpack ecosystem - [React Native Builder Bob](https://github.com/callstack/react-native-builder-bob): Simple set of CLIs to scaffold and build React Native libraries for different targets - [Rock](https://www.rockjs.dev/): Modular toolkit for teams building React Native apps - [Agent Skills](https://github.com/callstackincubator/agent-skills): Callstack’s best practices on React Native performance optimization, upgrading, CI workflows, and brownfield migrations