Senior Software Engineer, Commerce Platform

Instacart

full-time

Posted on: 9/3/2025

Location: California, Colorado • 🇺🇸 United States

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💰 $162,000 - $217,000 per year

Senior

AWSCloudDistributed SystemsGraphQLJavaMongoDBMySQLPostgresPythonRabbitMQRedisRubyRuby on Rails

About the role

Build robust platform services that orchestrate financial workflows for Instacart commerce, including totals, reconciliations, taxes, and funding methods like loyalty points.
Implement robust back-end services and APIs, writing clean, maintainable, and efficient code.
Optimize applications for peak performance and scalability.
Validate technical feasibility of system designs and contribute to all development lifecycle phases.
Focus on operational excellence with strong test coverage, monitoring, metrics, and alerting.
Design scalable and low-latency back-end architectures for high-volume incentive processing systems.
Develop extensible solutions that support new business initiatives.
Coordinate with cross-functional teams to ensure alignment of goals and schedules.

Bachelor's degree in Computer Science or Computer Engineering
5+ years with back-end development
3+ years with system design and architecture
Proficient in backend languages like Ruby, Python, or Java
Experienced working with database systems such as PostgreSQL, MongoDB, or MySQL
Experienced using caching mechanisms like Memcached or Redis
Experience with high scale throughput and distributed systems problems
Strong ownership mindset
Expertise in invoicing and billing processes within an e-commerce environment (preferred)
Experience with order management systems (OMS) or eCommerce platforms (preferred)
Understanding of various payment systems and methods used in eCommerce (preferred)
Experience in eCommerce discounting and pricing strategies (preferred)
Familiarity with Ruby on Rails with Sorbet, GraphQL APIs, Postgres and Snowflake, Temporal, AWS SNS/SQS or RabbitMQ, Memcached and Redis, AWS ECS/ALB auto-scaling, and monitoring tools like CloudWatch, DataDog, Sentry, OpsGenie (preferred)