Senior Backend Engineer – Customer Support Platform

AGENTIC

Senior Backend Engineer designing and implementing backend services for customer support operations. Building resilient systems to handle customer interactions and ensure data quality with high availability.

Posted 6/20/2026full-timeRemote • 🇺🇸 United StatesSeniorWebsite

Tech Stack

Tools & technologies

AWSJavaScriptJestKafkaNode.jsPostgresPythonTypeScript

About the role

Key responsibilities & impact

Own the services that keep Strata's customers unblocked — support, exception-handling, and remediation backend.
Build backend for Expert-in-the-Loop (HITL) queue — APIs to surface low-confidence documents, capture decisions, and resume workflows.
Design and implement scalable APIs in NestJS/TypeScript and/or FastAPI/Python using Domain-Driven Design (DDD).
Implement event-driven workflows over SQS with DLQ patterns, exponential backoff, and idempotent processing.
Model and optimize PostgreSQL schemas (Aurora) with migrations, indexing, and strict tenant isolation.
Write runbooks for services owned and participate in on-call rotation alongside SRE.
Collaborate with SRE on SLOs, dashboards, and incident response; with Customer Success on support needs.

Requirements

What you’ll need

6+ years backend engineering in production, shipping and operating real services (not just prototypes).
Strong in at least one, comfortable in both: Node.js/TypeScript (NestJS or equivalent) and Python (FastAPI).
REST API design, validation, auth, and clean error handling.
Deep PostgreSQL — schema design, migrations, query optimization, indexing, and multi-tenant isolation / row-level security.
Event-driven & async patterns — message queues (SQS, Kafka or equivalent), DLQs, retries, idempotency, and designing for partial failure.
AWS proficiency — Lambda, ECS/Fargate, S3, SQS, API Gateway, RDS/Aurora.
Reliability mindset — you design for SLOs, instrument for observability (structured logs/metrics/traces, correlation IDs), and have carried a pager.
Testing discipline — unit + integration + e2e testing (pytest/Jest, moto/localstack, SuperTest), and CI/CD experience.
Security awareness — authn/authz, rate limiting, input validation, secrets management, and audit logging.
English proficiency : B2+ required (C1 preferred).

Benefits

Comp & perks

Health insurance
401(k) matching
Flexible work hours
Paid time off
Remote work options

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

NestJSTypeScriptFastAPIPythonPostgreSQLREST API designevent-driven workflowsAWSunit testingintegration testing

Soft Skills

reliability mindsetcollaborationcommunicationproblem-solvingtesting discipline