Back-end Developer

Marathon Talent

. Design and ship services that open searches from external jobs, attach candidates, and advance candidates through recruiting stages .

Posted 10/6/2026full-timeRemote • New York • United StatesMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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

Demonstrates expertise in building and operating backend systems, with a strong focus on developing integrations with third-party APIs and maintaining workflow correctness. Proficient in TypeScript and relational data management, ensuring efficient and reliable recruiting processes.

Highest-signal resume keywords

Backend System DevelopmentTypeScript ProgrammingAPI IntegrationRelational Data ManagementWorkflow Engine Maintenance

ATS Keywords

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Applicant Tracking System Keywords

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

Hard Skills

TypeScriptBackend System DevelopmentAPI IntegrationRelational DataHTTP Request TracingUnique IndexesSoft DeletesPolling ImplementationWebhook ImplementationWorkflow History Analysis

Soft Skills

CollaborationClear CommunicationProblem-Solving

Tools & Technologies

Applicant Tracking SystemsCalendarsDocumentsNotes Tools

Industry Keywords

Recruiting WorkflowCandidate ManagementJob PublicationMilestone Recording

Tech Stack

Tools & technologies

TypeScript

About the role

Key responsibilities & impact

Design and ship services that open searches from external jobs, attach candidates, and advance candidates through recruiting stages
Develop the agent runtime that interprets recruiter messages, plans writes, and delivers them
Build and maintain the workflow engine that opens tasks when milestones are recorded and avoids duplicate work when steps are already satisfied
Develop integrations with applicant tracking systems, calendars, documents, and notes tools
Implement polling and webhook paths for detecting newly published jobs
Add recruiting workflow steps and verify that chat messages book interviews, move candidates, and record milestones
Trace production runs, diagnose narrow failure causes, and add preventive checks
Remove obsolete implementations after callers adopt the replacement
Collaborate through pull requests with clear descriptions of behavior, risk, and verification
Verify recruiting behavior using the real application and repeated model runs where applicable
Talk with product users and recruiting firms, and follow searches from job publication through signed offer

Requirements

What you’ll need

Experience building and operating backend systems that other people depend on
Comfort with relational data and transactions
Understanding of unique indexes and soft deletes
Experience shipping integrations against third-party APIs
Understanding of API rate limits, draft-versus-published states, and delayed visibility after successful writes
Ability to trace an HTTP request through workflow history and identify which step is running
Ability to write maintainable TypeScript
Interest in recruiter-facing product behavior and workflow correctness