Software Engineer II – Fulfillments Team

Extend

. Build and ship features across fulfillment and servicing, including refunds, replacements, and reverse logistics .

Posted 10/14/2026full-timeRemote • United StatesMid-LevelSenior💰 $140,000 - $160,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in building and shipping scalable, AI-native applications while managing the entire feature lifecycle from design to deployment. Proficient in collaborating with cross-functional teams to ensure high-quality user experiences and effective communication across stakeholders.

Highest-signal resume keywords

Full-Stack DevelopmentAWS Production SystemsAI/LLM Feature ShippingSingle-Page Application DevelopmentAPI Design and Versioning

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

Full-Stack DevelopmentAWSAI/LLM FeaturesAPI DesignSingle-Page ApplicationsData ModelingContext EngineeringEvent-Driven ApplicationsState ManagementQuality Assurance

Soft Skills

Clear CommunicationProblem SolvingAdvocacyCollaborationAttention to Detail

Tools & Technologies

AI Developer ToolingServerless ArchitectureMonitoring ToolsUX Design CollaborationObservability Tools

Industry Keywords

FulfillmentServicingReverse LogisticsProduction SystemsFeature Ownership

Tech Stack

Tools & technologies

AWS

About the role

Key responsibilities & impact

Build and ship features across fulfillment and servicing, including refunds, replacements, and reverse logistics
Own features end to end, from design through building, deployment, release, and monitoring
Deliver scalable, event-driven, AI-native applications
Build single-page applications and own client and server state management
Partner with design on UX to ship polished, high-quality applications
Work with senior engineers and platform teams on system design, raising risks and tradeoffs early
Build, test, and monitor AI/agentic features in production with attention to quality and safety
Use AI developer tooling daily and share effective practices with the team
Propose and deliver proactive investments such as refactors, observability, and upgrades
Communicate with product, design, solutions, and engineering teams to align work with business goals

Requirements

What you’ll need

4+ years of full-stack experience
Hands-on experience building production systems on AWS, including serverless
Demonstrated experience shipping AI/LLM features to production
Solid grasp of API design, versioning, idempotency, and backwards compatibility
Track record of owning features end to end and working through ambiguous problems with limited direction
Experience building production single-page applications with modern state management
Experience working closely with designers to turn UX into quality software
Sound data modeling skills
Working understanding of context engineering for agentic features
Daily fluency with AI developer tooling
Willingness to raise concerns early and push back with data
Clear communication across product, business stakeholders, designers, support, and engineers
Ability to form clear opinions and advocate for them
Extend does not provide immigration-related sponsorship for this role

Benefits

Comp & perks

Competitive salary based on experience
Full medical benefits
Dental & vision benefits
Stock in an early-stage startup growing quickly
Generous, flexible paid time off policy
401(k) with Financial Guidance from Morgan Stanley
Collaborative and supportive environment