Senior Lead Engineer, Fulfillment Platforms

About the Team

Stitch Fix’s Fulfillment Platform group is a multidisciplinary team of Software Engineers, Operations Researchers and Data Scientists that owns the technology powering every step of a product’s journey - from a vendor’s dock, through our fulfillment centers, onto a client’s doorstep and back again. Our systems drive the movement, accuracy, and efficiency of inventory flow across our network, inside our warehouses, and through our delivery channels. Our charter is:

• Operate a robust platform for order-fulfillment workflows that prioritizes SLA-driven throughput, labor efficiency, storage utilization, optimized pick paths, and real-time inventory accuracy.
• Enforce inventory checks on receipt and pre-shipment to ensure accuracy, integrity, and uphold client trust.
• Forecast inbound merchandise arrivals using vendor Advance Shipment Notices (ASNs) and carrier scans.
• Select the optimal carrier service for each outbound package by balancing speed, cost, and client delivery promise.
• Surface accurate end-to-end tracking data to clients and internal stakeholders.
• Manage carrier integrations, and label generation for every package type.
• Enable data-driven decisions on allocations, inter-warehouse transfers, zone-skipping, and more.

The volume, complexity, and immediacy of these decisions create a deeply data-rich playground that rewards both rigor and creativity. We value a curiosity-driven culture where team members have the autonomy to own products end-to-end and have support to experiment, learn, and deliver measurable impact.

About the Role

As the Senior Lead Engineer on Fulfillment Platform, you will help to set the technical direction for the systems that orchestrate Stitch Fix’s warehouse and transportation networks. You will focus on development and roadmapping against key application enhancements to support floor efficiency, accuracy, and system reliability—all while mentoring engineers and driving industry best practices. Your work will directly influence how quickly and economically we delight clients, unlock inventory, and grow our margins. In this role, you will:

• Influence the evolution of our multi-carrier shipping platform—rate shopping, label generation, tracking ingestion, and returns workflows.
• Design fault-tolerant services that reconcile hundreds of thousands of carrier events per day and surface real-time shipment status to downstream systems.
• Ensure comprehensive visibility into warehouse operations and precise ingestion of new merchandise.
• Mentor engineers through code reviews, design sessions, and thoughtful feedback, fostering a culture of high standards and continuous learning.
• Instrument, monitor, and tune our services for reliability, latency, and cost.
• Translate business goals (cost, delivery promise) into technical roadmaps that balance short-term wins with long-term scalability.

You're excited about this opportunity because you will…

• Build tight relationships between enthusiastic partners in varied disciplines of industrial, software, and operations research engineering, owning end-to-end hardware to cloud solutions.
• Solution at high speed with a small, agile team of coworkers to produce outsized impact on the business.
• Showcase your ability to solution in a system with high-uptime requirements.
• Have the autonomy to identify and roadmap unaddressed problems in the business and their impact, as well as offer new, improved solutions to existing challenges.
• Take a leading role in prioritizing and sequencing high-impact work to drive the best value for our clients and stakeholders.
• Apply your understanding of systems design, engineering for resiliency, and thinking in tradeoffs across a multidisciplinary team of hardware, application, and machine learning engineers.
• Be exposed to a wide-open field of opportunity for impact with plenty of challenges to make your own.

We’re excited about you because…

• You have 5-8 years of software engineering experience.
• You have proven experience designing large-scale, event-driven or distributed systems (ideally in fulfillment, logistics or e-commerce).
• You have experience implementing and managing integrations with a wide range of external logistics and technology partners that power warehouse and transportation operations. 
• You have a track record of leading engineers through ambiguous, cross-functional projects and delivering production software that moves key business metrics.
• You have fluency in at least one modern programming language (we primarily use Ruby, Go, and Python, but value great engineers over great syntax).
• You have proven experience with relational databases (e.g., Postgres, MySQL) plus a knack for picking up new technologies fast.
• You have built production services on a major cloud platform - AWS, GCP, Azure or similar, and are highly skilled with modern observability stacks like Datadog. 
• You have practical knowledge of optimization, forecasting, or decision-science techniques—and the humility to partner with specialists when needed.
• You have a bias for automated testing, continuous delivery, and observability as non-negotiable facets of quality.
• You have strong communication skills—able to translate between technical details and business outcomes for stakeholders at every level.

Why you'll love working at Stitch Fix...

• We are a group of bright, kind people who are motivated by challenge. We value integrity, innovation and trust. You’ll bring these characteristics to life in everything you do at Stitch Fix.
• We cultivate a community of diverse perspectives— all voices are heard and valued.
• We are an innovative company and leverage our strengths in fashion and tech to disrupt the future of retail. 
• We win as a team, commit to our work, and celebrate grit together because we value strong relationships.
• We boldly create the future while keeping equity and sustainability at the center of all that we do. 
• We are the owners of our work and are energized by solving problems through a growth mindset lens. We think broadly and creatively through every situation to create meaningful impact.
• We offer comprehensive compensation packages and inclusive health and wellness benefits.