Senior Software Engineer, Fulfillment

Instacart

. Architect, build, and maintain backend applications and systems for routing, task allocation, fulfillment tracking, and shopper compensation .

Posted 10/26/2026full-timeRemote • CanadaSenior💰 CA$168,000 - CA$177,500 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in backend application architecture and development, with a strong focus on API design, distributed systems, and operational excellence. Proven ability to mentor teams and drive best practices in a collaborative environment.

Highest-signal resume keywords

Backend Development ExperienceAPI Design (REST/RPC)Asynchronous Event-Driven SystemsCommunication SkillsFulfillment and Logistics Software Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

RubyPythonGoDatabase DesignDistributed System Design PatternsCode Quality StandardsTesting PracticesOperational Practices

Soft Skills

MentoringCollaborationProblem Solving

Tools & Technologies

AI Coding ToolsWorkflow OrchestrationState Machines

Certifications & Qualifications

Bachelor's Degree in Computer ScienceMaster's Degree in Software Engineering

Industry Keywords

E-CommerceLogisticsFulfillmentRegulatory ComplianceFinancial Compliance

Tech Stack

Tools & technologies

PythonRubyGo

About the role

Key responsibilities & impact

Architect, build, and maintain backend applications and systems for routing, task allocation, fulfillment tracking, and shopper compensation
Lead technical design for high-impact projects and initiatives
Solve logistics problems across the consumer marketplace and enterprise space through shipped features
Ensure Tier-0 systems are reliable and observable with clear ownership
Drive platform best practices through alignment with product, compliance, and engineering stakeholders
Use AI-assisted tooling and workflows to improve day-to-day productivity
Mentor engineers toward higher standards for code quality, testing, and operational practices

Requirements

What you’ll need

5+ years of backend development experience
Fluency in at least one backend language; Ruby, Python, and Go are used, but Ruby experience is not required
Strong working knowledge of services/API design (REST/RPC), databases, and distributed scalable system design patterns and principles
Experience building and operating asynchronous, event-driven systems in production
Excellent communication skills in complex cross-functional and highly collaborative environments
Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience
Preferred: experience with fulfillment, logistics, or e-commerce software
Preferred: experience with workflow orchestration or state machines
Preferred: regular use of AI coding tools such as Claude Code or Codex
Preferred: experience with regulatory or financial compliance systems

Benefits

Comp & perks

New hire equity grant
Annual refresh grants
Flexible work location: home, office, or coffee shop
Regular in-person events
Market-competitive compensation and benefits