AngularJS to Angular Migration Services

Our AngularJS migration process begins by mapping the fundamental structure underlying the existing code. No guesses.

The audit phase uncovers dependencies, detects duplicate logic, and segments the application into functional domains. This is the foundation for any controlled migration — a blueprint that shows what to keep, what to refactor, and what must be rebuilt.

The engagement includes five technical deep dives:

• Dependency Graph Extraction. Our engineers build a visual map of inter-component calls, directive bindings, and third-party modules through static code analysis and runtime instrumentation.
• Component Classification. We categorize every component by business function, technical complexity, and usage frequency, flagging shared modules and UI primitives for prioritization in the bridge layer.
• Template Risk Profiling. Our team detects anti-patterns in AngularJS templates—nested scopes, watchers, two-way bindings—and scores each template by refactor effort and test coverage.
• Service & State Mapping. We audit global services, event buses, and stateful directives, identifying logic that must transition to RxJS- or NgRx-compatible structures.
• Dead Code & Redundancy Detection. Using AI-accelerated heuristics, we uncover unused services, redundant modules, and legacy fallbacks and eliminate them before migration.

Output: an Angular migration blueprint that segments legacy complexity, aligns effort with business priority, and cuts dead weight before the first line of new code is written.

We don’t lift-and-shift. We re-architect to accelerate.

This phase defines the Angular structure that will replace legacy logic, not as a replica but as a system ready for modular delivery, type safety, and long-term maintainability. We design for continuity during migration and velocity after it.

The engagement includes five foundational layers:

• Target State Blueprint. We define the target architecture in Angular — modular domains, shared libraries, routing strategies, and DI boundaries — fully aligned with product workflows and scaling priorities.
• Routing Strategy Definition. We replace legacy $route or ui-router with Angular’s modern router. Our team maps guards, resolvers, and lazy-loading entry points to support phased feature migration, ensuring delivery is not disrupted.
• Shared Layer Abstraction. We design shared components, global utilities, and configuration tokens to eliminate logic duplication and enforce structural consistency across modernized modules.
• Bridge Layer Strategy. We define how Angular and AngularJS will coexist during the transition. This includes bootstrapping flows, communication boundaries, and runtime protocols to prevent fragmentation and ensure operational integrity.
• Incremental Deployment Path. We sequence migration by module dependencies and delivery risk. Each release unit includes well-defined entry and exit interfaces, rollback options, and safeguards to maintain business continuity.

Output: an architectural roadmap that replaces AngularJS with a modern structure, without halting delivery, and without locking business value behind a complete rewrite.

Keep both systems alive — but under control.

During migration, AngularJS and Angular must operate in parallel. Bridge engineering creates a shared runtime safely, routing, rendering, and service injection — all without collisions or regressions.

The engagement includes five tactical constructs:

• Dual Bootstrapping Framework. We engineer a coordinated initialization sequence that launches both AngularJS and Angular. The setup manages zone contexts, synchronizes lifecycle hooks, and ensures race-condition-free control flow across frameworks.
• Interop Service Adapters. We build injectable facades that allow Angular to consume AngularJS services — and vice versa — while maintaining compatibility with observables, promises, and scoped DI contexts.
• Component Projection Layer. Our team makes it possible to render Angular components within AngularJS views using downgradeModule, and wraps AngularJS components for use in Angular templates through upgradeComponent strategies.
• Shared State Pipeline. We design a cross-runtime state layer that maintains predictable data flow. Using BehaviorSubjects or custom adapters, we ensure real-time sync between AngularJS and Angular until the legacy layer is retired.
• Routing Bridge Safeguards. We segment route trees, translate paths, and apply view-level constraints to prevent hydration issues, ensure seamless navigation, and maintain route integrity during the hybrid phase.

Output: a live bridge that keeps delivery moving, isolates migration surfaces, and gives engineering full visibility into system behavior during transition.

We migrate AngularJS components to Angular without disrupting delivery — isolating complexity, preserving behavior, and rebuilding structure where it matters.

Our work prioritizes migration by UX exposure, performance sensitivity, and test coverage gaps — turning high-risk legacy logic into maintainable, typed Angular components.

The engagement includes five core services:

• Component Inventory & Classification. We inventory all AngularJS components, scoring each by exposure, usage depth, and code age. Components are then classified by migration complexity and delivery risk, forming the basis of our phased sequencing strategy.
• Template & Binding Decomposition. We extract embedded logic from AngularJS templates and refactor them using Angular’s structural directives. Scope chains and two-way bindings are removed in favor of clean @Input/@Output flows and unidirectional data patterns.
• Controller to Class Conversion. Our team focuses on converting AngularJS to Angular by rebuilding controllers as typed Angular component classes. We enforce strict lifecycle usage, modularize inline logic, and eliminate direct DOM manipulations to align with Angular’s reactive model.
• Service Detachment & Rewiring. We rewire dependencies from global AngularJS services to Angular injectables, observables, or compatibility adapters — decoupling components from the legacy runtime and preparing them for standalone deployment.
• Controlled Rollout & Monitoring. Each migrated component is released behind feature flags or route-level constraints. We actively monitor behavior, verify UI contracts, and define rollback boundaries to contain failure scenarios without impacting the broader system.

Output: a growing set of Angular components with lower cognitive load, higher testability, and reliable behavior across deployment cycles,  delivered in parallel with feature flow.

We restructure how state flows through the system, eliminating AngularJS $scope chains and replacing them with predictable, observable-driven logic in Angular.

Our work enables a transition from fragile digest cycles to structured, reactive patterns using RxJS or state containers like NgRx, which are designed for testability, traceability, and scalability.

The engagement includes five core services:

• State Flow Audit. As part of the Angular migrate process, we analyze the full lifecycle of stateful data across AngularJS views, services, and global objects. Our team identifies tight coupling, circular dependencies, and untracked mutations that obstruct clean separation and refactoring.
• Scope Chain Extraction. We eliminate $scope logic, watcher trees, and two-way bindings. In their place, we implement unidirectional data flow through clear input/output contracts and reactive subscriptions to simplify debugging and state reasoning.
• Service Layer Refactoring. We restructure legacy global services into Angular injectables built on pure functions and observable streams. Logic is encapsulated, implicit dependencies are removed, and side effects are isolated to improve testability and reusability.
• Signal & Store Design. For critical domains, we introduce signal-based logic or integrate NgRx stores. Our implementation includes typed actions, selectors, and effects to support controlled updates, enable time-travel debugging, and ensure consistent data propagation.
• Integration Consistency Checks. We validate every state transition between AngularJS and Angular runtimes. Shared state is connected only where necessary, utilizing strict interfaces to safeguard data integrity and ensure consistent behavior at runtime.

Output: a deterministic, scalable, and debuggable state layer, disconnected from AngularJS internals and ready for modular growth within Angular’s architecture.

We replace legacy testing logic with a structured, modern test stack, making every component, flow, and deployment step observable, repeatable, and fail-safe.

Our work eliminates brittle Karma/Jasmine tests, rewrites test harnesses for Angular’s structure, and embeds validation across the delivery pipeline.

The engagement includes five core services:

• Legacy Test Coverage Audit. We audit existing AngularJS test suites across e2e, unit, and integration layers. Our analysis flags brittle mocks, UI flakiness, and critical test gaps, scoring application zones by regression exposure and test reliability.
• Unit & Integration Layer Rebuild. We replace AngularJS test harnesses with modern tooling, including Jest, TestBed, and the Angular Testing Library. Test units are rebuilt with shallow rendering, injected mocks, and precise separation of concerns to provide faster and more reliable feedback loops.
• End-to-End Automation. High-risk UI flows are reimplemented using Cypress or Playwright. Our tests simulate real user behavior with async stability, intelligent retries, and optional visual diffing for layout-critical features.
• CI Integration & Runtime Checks. We embed automated tests into CI/CD pipelines — running cross-browser test matrices, enforcing coverage thresholds, and capturing screenshot-based regressions in headless environments.
• Component Testability Refactor. Every migrated Angular component is rebuilt with testability in mind, featuring observable-based inputs, event-driven outputs, deterministic logic, and stable selectors to support robust and long-term test automation.

Output: a modern, automated, and pipeline-native test system, aligned with Angular architecture, hardened for regression, and built for delivery at scale.

We untangle and modernize the package ecosystem, replacing legacy AngularJS modules with supported, secure, and performance-optimized dependencies.

Our work identifies unused packages, deprecated APIs, and deep-coupled logic that slow builds, bloat bundles, and introduce long-term maintenance risks.

The engagement includes five core services:

• Third-Party Inventory & Audit. We map all npm packages and internal libraries in use, scoring each by usage frequency, maintenance status, update history, and risk footprint. This provides a clear view of third-party exposure across the codebase.
• Deprecated & Insecure Module Replacement. We identify and eliminate deprecated AngularJS packages, replacing them with Angular-native or platform-supported alternatives. Each substitution is evaluated for polyfill overhead and long-term maintainability.
• Bundle Size Optimization. Our team analyzes how each package contributes to the overall build size. We eliminate dead imports, flatten nested dependencies, and transition to ES modules where possible to improve load performance and maintainability.
• Custom Utility Consolidation. We refactor fragmented internal utilities, extract reusable logic, and consolidate them into centralized Angular services or libraries. All shared functions are rebuilt with typed contracts for consistency and reusability.
• Cross-Version Compatibility Enforcement. We standardize the build pipeline for dual-runtime environments, aligning versions of TypeScript, RxJS, and zone.js across AngularJS and Angular. This prevents runtime conflicts and ensures smooth hybrid operation during migration.

Output: a clean, maintainable, and future-proofed dependency graph — hardened for audit, optimized for performance, and ready for full Angular runtime support.

We embed Angular migration into your release infrastructure — turning testing, building, and deploying into predictable, low-risk automation.

Our work upgrades legacy release flows with modern CI/CD stages, pre-build validation, parallel test runners, and production-grade rollout logic.

The engagement includes five core services:

• Pipeline Audit & Gap Analysis. We review existing CI/CD workflows across all branches, environments, and build artifacts to ensure consistency and efficiency. Our audit identifies inefficiencies, manual interventions, and missing validation gates that delay or compromise delivery.
• Build Optimization & Caching. We activate Angular’s Ahead-of-Time (AOT) compilation, Ivy rendering engine, and differential loading. Build caching and artifact reuse are configured to significantly reduce pipeline execution time and resource consumption.
• Test Layer Integration. We embed unit, integration, and end-to-end testing into the pipeline. Execution is parallelized for speed, with failure thresholds enforced and automatic rollbacks triggered in the event of test regression.
• Staged Deployment Logic. We implement blue-green, canary, or phased deployment strategies using container orchestration or cloud-native services. Production releases are gated behind validated quality metrics and runtime checks.
• Environment Config & Secrets Management. We centralize environment configurations and enforce secure management of secrets using encrypted stores. Deployment consistency is maintained across local, staging, and production environments with strict variable governance.

Output: a fully integrated CI/CD pipeline that moves Angular builds from commit to production with traceability, safety, and speed.

We stay after deployment, validating system behavior, stabilizing performance, and supporting your team through the first months of Angular delivery.

Our work closes the migration loop with runtime monitoring, incident tracing, team enablement, and codebase hardening for ongoing feature development.

The engagement includes five core services:

• Runtime Behavior Validation. We instrument the Angular application with telemetry to track runtime errors, load performance, and UI responsiveness. Post-migration metrics are benchmarked against legacy baselines to detect regressions and performance drift.
• User Flow Monitoring. We deploy synthetic monitoring and real-user session replay tools across critical flows, ensuring click-throughs, form interactions, and route transitions operate smoothly under real conditions.
• Issue Response & Triage. A structured support pipeline is established for handling post-migration issues, including regression bugs, UI anomalies, and dependency conflicts. We apply trace-based root cause analysis to resolve incidents quickly and prevent recurrence.
• Engineering Enablement. We deliver onboarding sessions, maintain internal documentation, and conduct code walkthroughs to upskill product teams. Topics include Angular design patterns, reactive state architecture, and test-first development workflows.
• Maintenance Readiness Audit. Before closing the engagement, we validate that the modernized system is production-grade: component architecture is stable, services are modular, tests are comprehensive, and third-party packages are clean and up to date..

Output: a resilient Angular system backed by real-time observability, team fluency, and support structure that protects your momentum after migration.