Sanitized architecture and team-attributed outcomes only. Client source, screenshots, data, and a demo are not public.
Disclosure boundary
Disclosure boundary
Audit basisPublic résumé plus the infrastructure-cost evidence entry, preserving team attribution.
Published here
Generic platform title, role, shared UI coordination, selected AWS services, migration scope, and approximate team result.
A conceptual modernization path rather than the client’s precise topology.
Kept private
Client repositories, screenshots, domain data, account layout, service inventory, traffic, and operational incidents.
Any implication that I solely designed the migration or individually produced the cost result.
01 / Overview
A platform modernization spanning an Angular 7-to-12 migration and a team move from Java services to Node.js and TypeScript serverless services on AWS, with Terraform-managed infrastructure and blue-green delivery.
02 / The problem
The problem
Modernize an existing analytics platform across UI, services, and infrastructure while continuing delivery and coordinating changes across multiple developers.
03 / My responsibility
My responsibility
Contribute hands-on to the Angular 7-to-12 migration and interactive analytics widgets.
Share technical coordination of UI changes with two other developers rather than claim sole frontend leadership.
Contribute to Node.js and TypeScript services, AWS infrastructure, Terraform, and blue-green delivery as part of the broader migration team.
Constraints
Constraints
The work modernized an existing product rather than starting from a blank architecture.
UI and service changes had to remain coordinated across developers and deployment boundaries.
The public result is approximate and belongs to the team; the case cannot assign it to one engineer.
04 / Architecture
Architecture
Sanitized modernization path
A conceptual view of the disclosed stack. It shows the direction of the modernization without reproducing accounts, service boundaries, data models, or client topology.
The product already had an Angular application and ongoing delivery commitments.
Decision
Move the existing frontend from Angular 7 through Angular 12 while continuing feature work and shared UI coordination.
Consequence
The team retained product context and delivery continuity, with compatibility work spread across the modernization.
02
Move services toward the TypeScript stack
Context
The modernization included existing Java services alongside a TypeScript-heavy product team.
Decision
Migrate selected services to Node.js and TypeScript on AWS Lambda behind API Gateway.
Consequence
The team migration contributed to an approximately 30% infrastructure-cost reduction; this remains a team result.
03
Treat infrastructure and rollout as code
Context
Service migration changes runtime infrastructure and increases deployment coordination risk.
Decision
Manage disclosed infrastructure with Terraform and use blue-green deployment practices.
Consequence
Infrastructure changes become reviewable and rollouts gain an explicit transition path.
06 / Trade-offs
Trade-offs
Version migration instead of abandoning the existing UI
What it enablesExisting product behavior and team knowledge remain useful while the framework advances.
What it costsCross-version compatibility and coordinated feature delivery add migration overhead.
Serverless Node.js and TypeScript services
What it enablesManaged execution and stack alignment supported the team’s lower infrastructure-cost outcome.
What it costsDistributed functions create more API, observability, retry, and deployment boundaries to coordinate.
Shared UI coordination
What it enablesDecisions and migration work can be distributed among three developers instead of depending on one person.
What it costsConventions, sequencing, and review require explicit alignment across contributors.
07 / Failure modes
Failure modes
A framework upgrade can expose incompatible dependencies or behavior before a feature reaches production.
A UI and API contract can drift when migrations proceed on different schedules.
A distributed service failure can be partial, requiring logs and retries at more than one boundary.
A rollout can fail after infrastructure changes; blue-green delivery keeps the transition explicit rather than treating deployment as one irreversible step.
The résumé provides the complete career context. For client-sensitive details, contact me and I can discuss the work at the appropriate disclosure level.