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Abebayhu Kassa
Senior Integration Developer specializing in MuleSoft API-led connectivity
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Backend/integration-focused engineer in the Maryland area with production experience building FastAPI REST services secured with OAuth2.1/JWT and reliability patterns (timeouts, selective retries, idempotency, centralized error handling). Has delivered AWS-integrated MuleSoft/CloudHub solutions and supported AWS Glue ETL workflows, plus demonstrated strong SQL tuning with a 30–40s to 3–5s performance improvement.
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Key Strengths
- Designed/maintained production FastAPI services with layered architecture and downstream integrations (including SOAP)
- Implemented API security with OAuth 2.1/JWT validation (JWKs, issuer/audience/expiry, scopes/roles) and endpoint-level RBAC
- Reliability engineering: strict outbound timeouts, selective retries (5xx/429/timeouts) with exponential backoff+jitter, idempotency strategies
- Centralized error handling with consistent error responses and correlation IDs while avoiding sensitive logging
- CI/CD and release discipline: Jenkins/Maven pipelines, environment promotion (Dev/Test/Prod), rollback and post-deploy validation
- ETL/Glue operational experience: schema evolution/versioning, data quality checks, CloudWatch monitoring and controlled reprocessing
- SQL performance tuning with measurable impact (reduced query runtime ~30–40s to ~3–5s via composite indexes; CPU reduction)
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