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Reacher · 11 hours ago

Senior Backend Software Engineer

United States

Full-time

Remote

Senior Level

$140K/yr - $190K/yr

5+ years exp

Reacher is the #1 TikTok Shop partner helping brands scale their affiliate marketing. The Senior Backend Software Engineer will architect and own core systems, scale data infrastructure, and provide technical leadership while mentoring other engineers.

Artificial Intelligence (AI)Information TechnologySoftware

Responsibilities

Architect & Own Core Systems: Lead the end-to-end design and implementation of high-throughput backend services and complex data pipelines

Scale Data Infrastructure: Design and optimize data engineering systems that handle massive streams of commerce and creator data, ensuring reliability and observability

Technical Leadership: Set the gold standard for engineering excellence. Define our patterns for schema design, service boundaries, and distributed data processing

Lead and shape engineering architecture - set standards for code quality, testing, and development practices across the stack

Mentor and guide other engineers, establishing best practices and patterns

Drive Velocity: Balance "shipping fast" with "building right," ensuring our infrastructure scales ahead of our growth trajectory

Own the testing strategy for our entire stack, moving beyond unit tests to include end-to-end integration tests, load testing, and automated data quality checks

Qualification

PythonPostgreSQLData EngineeringMicroservicesDjangoFastAPIGCP Data ToolsTesting FrameworksResourcefulnessProduct IntuitionTechnical LeadershipMentoring

Required

5–9 years of professional experience including significant time spent in high-growth startups or big-tech environments owning 'Tier 0' services

Expert-level in Python and deeply comfortable navigating both relational databases (PostgreSQL) and specialized data systems

You've built and maintained production-grade ETL/ELT pipelines, handled schema evolution at scale, and managed data lake/warehouse integrations

You don't just write functions; you think in terms of eventual consistency, backpressure, and system bottlenecks

You care about the why behind the data. You can identify when a requirement is technically feasible but strategically flawed

Can be the technical expert and set standards for engineering quality

Resourceful and thrive in ambiguous environments—you figure things out independently

You believe that code isn't 'done' until it's tested, documented, and observable

Expert Python, Django, FastAPI, and advanced PostgreSQL (indexing, optimization, locking patterns)

Hands-on experience with GCP data tools (Cloud Composer/Airflow, BigQuery, Pub/Sub, Cloud Run Jobs) or equivalent (Kafka, Spark, Snowflake)

Deep knowledge of observability (distributed tracing, structured logging) and testing strategies for data integrity

Experience with distributed locking, idempotency patterns, and microservices orchestration

Expert-level knowledge of testing frameworks (e.g., pytest, Cypress). Deep experience in Data Quality testing (e.g., Great Expectations, dbt tests) to ensure pipeline accuracy