Testing AI agents: mock the model or use the real API?
Split AI agent tests into 4 layers: pure code, tools, the real model, and review. Use mocks without false confidence, then run a small real-model eval.
Accepting new clients
You run the business.
I handle the software.
I'm Samuel Fajreldines, a senior software engineer. Growing U.S. businesses hire my team to become their software department, not a vendor they rehire every quarter. I set the technical direction, my team builds and ships, and I stay accountable for everything that goes out.
- From $5,000/month
- Ongoing, not a project
- My team handles delivery
Articles — Page 7
Articles
Contract tests for MCP servers in TypeScript
Test a TypeScript MCP server with a stdio client, Vitest, and Inspector. Catch broken schemas, missing tools, and errors before CI.
AI software engineer portfolio: what to prove
Build an AI software engineer portfolio that shows the problem, architecture, tests, failures, operations, and decisions behind a project.
Durable execution for AI agents: queue or workflow?
Learn when AI agents need durable execution, checkpoints, queues, or workflows to resume safely after failures and retries in production with clear trade-offs.
AI agent memory: Graphiti, vector RAG, or PostgreSQL?
Compare Graphiti, vector RAG, and PostgreSQL for AI agent memory. Separate truth, retrieval, history, and verification before production decisions at scale.
