Handyman Interactive

Backend Engineer

• A growth-stage B2B / Saas / Data Platform client of ours processes ~10 k req/s and ~3 TB of relational data today; customer onboarding this quarter will push volumes 5–100× . Hotspots already appear in Sequelize‑generated queries, throttling Aurora PostgreSQL and driving up AWS spend.
• Our client needs a senior engineer who lives and breathes SQL performance to get them ahead of that curve (I.e. prep & plan to scale up data volumes immensely!).
• Duration : 4 months estimated (extension possible)
• Weekly Commitment : 5 days per week, full-time (Freelance)
• Current Stack Node.js (v16+) / TypeScript · Express.js · Sequelize ORM
• Aurora PostgreSQL 15 primary, Redis/ElastiCache for low‑latency cache
• AWS ECS Fargate · Docker · GitHub Actions CI/CD
• Observability: New Relic, pg_stat_statements, auto_explain
• Auth: JWT today, migration to Stytch planned Q4
• Tests: Jest (unit, integration with Testcontainers‑Postgres)

Senior Backend Engineer