Available for senior full-stack & AI engineering roles

Alexander Lumenbuilding personal operating systems with AI.

Senior full-stack software engineer building AI-powered personal operating systems for finance, work, health, and life automation. Secure, scalable backend and full-stack systems with Java, Spring Boot, React, TypeScript, cloud platforms, and AI agents — connected through MCP and context memory so LLMs can understand and act across life.

15+
Years engineering
7
Personal AI modules
Java · TS
Primary stacks
MCP
Context layer
About

Senior engineer. Practical AI product builder.

Alex is a senior full-stack software engineer with 15+ years of experience building scalable backend systems and full-stack applications across healthcare, finance, e-commerce, and enterprise platforms.

He specializes in Java, Spring Boot, React, TypeScript, cloud architecture, API design, integrations, automation, and AI-assisted development.

His current personal work focuses on AI agents, MCP-connected tools, personal context memory, workflow automation, and practical software that helps people manage life more intelligently.

Currently focused on
  • Personal AI operating system architecture
  • MCP context memory across life domains
  • Voice-first and scheduled agent workflows
  • Practical, secure financial tooling
Featured Projects

A personal product lab.

Modular tools designed to connect into a single AI-powered personal operating system.

Active

MoneySprout

Personal Finance Intelligence

An AI-assisted personal finance dashboard inspired by Mint, Monarch, YNAB, and Empower. A full view of spending, accounts, budgets, cash flow, and actionable financial-health insights.

  • Account & transaction tracking
  • Budgeting and category insights
  • Cash flow overview
  • AI summaries of spending patterns
  • Plaid / banking integrations
FinanceAIPlaidReactSpring Boot
Live Demo
Active

Job Booster

Career & Job Search Assistant

A personal career automation platform that turns the job search into a structured CRM — resumes, applications, recruiters, interviews, and follow-ups in one place.

  • Application pipeline & resume tracking
  • Recruiter and company notes
  • AI-assisted cover letters & replies
  • Interview preparation flows
  • LinkedIn / Gmail / calendar automation
CareerAI AgentsCRMAutomation
Live Demo
Experiment

Life Context

MCP Memory Layer

A central context-memory system that connects personal modules through MCP, letting AI assistants understand and act across finance, work, health, and relationships.

  • MCP-connected modules
  • Personal context memory
  • Cross-domain AI assistance
  • Modular, extensible architecture
  • Local and cloud agent workflows
MCPLLMContext MemoryAI Agents
Planned

Health Module

Personal Health Timeline

A health-focused module for symptoms, medications, appointments, and notes — designed to organize personal health context and prepare better questions for doctor visits.

  • Symptom & medication notes
  • Appointment preparation
  • Personal health timeline
  • AI summaries
  • Integrated with Life Context
HealthTechAIPersonal DataTimeline
Planned

Relationship CRM

People & Conversation Memory

A personal relationship tool to remember important people, conversations, reminders, dates, and emotional context — with AI-assisted message drafting.

  • Personal CRM for people you care about
  • Conversation notes
  • Reminders and follow-ups
  • Relationship context memory
  • AI-assisted message drafting
Personal CRMAIMemoryReminders
Planned

Fitness Module

Training, Recovery & Goals

A fitness module focused on gym routines, progress tracking, recovery, and AI-assisted workout planning aligned with personal goals.

  • Workout tracking
  • Progress notes
  • Recovery reminders
  • Goal planning
  • AI-generated training suggestions
FitnessAI CoachTrackingHabits
Experiment

Agent Orchestration

Voice & Scheduled AI Agents

Experiments with voice-first and scheduled AI agents that handle email, calendar, reminders, job-search workflows, and local + cloud automations.

  • Voice-first assistant workflows
  • Scheduled tasks & reminders
  • Email / calendar automation
  • Local and cloud agent execution
  • Human-in-the-loop approvals
AI AgentsLangGraphVoiceWorkflow
LifeOS Vision

One context layer. Many specialized modules.

Each module owns its domain. A shared MCP-based context memory lets AI agents reason and act across life — without locking anything into a single monolithic app.

Life Context · MCP Core
Shared memory for every module
Finance
Work
Health
Relationships
Fitness
Agents
Technical Stack

What I build with.

Backend
JavaSpring BootREST APIsMicroservicesJPARedisMongoDBSQL / NoSQLKafka / Pub-Sub
Frontend
ReactTypeScriptNext.jsStyled-ComponentsReact QueryJest / RTL
Cloud / DevOps
AWSGCPDockerKubernetesGitHub ActionsCI/CDVercel
AI / Automation
OpenAI APIsSpring AIMCPLLM AgentsLangGraph / LangChainRAG / Vector DBsWorkflow Automation
Professional Background

Enterprise systems across healthcare, finance, and e-commerce.

Alex has built and maintained production systems involving healthcare workflows, surgery scheduling, financial integrations, backend APIs, frontend dashboards, automation tools, and AI-assisted internal applications.

He's comfortable owning systems end-to-end — from architecture and API design to cloud deployment, observability, and the developer experience for the teams that use them.

Core strengths
  • Backend architecture
  • Full-stack product development
  • API design
  • Cloud systems
  • Enterprise integrations
  • AI-assisted engineering
  • Mentorship and ownership
  • Practical product thinking
Contact

Interested in AI products, backend systems, or practical automation?Let's connect.