# Software Engineer 3 at MongoDB > United States · Unspecified · Software engineering · open. Source: https://alderhq.app/jobs/greenhouse%3Amongodb%3A8348102 (read 2026-11-12). ## Facts (observed) - Company: [MongoDB](https://alderhq.app/companies/mongodb) - Location text: New York City; New York City - Where it can be done from (inferred): United States (evidence: "Location: New York City; New York City") - Posted: 2026-11-12 (0 days ago) - First seen by alder: 2026-11-12 · last verified: 2026-11-12 - Reposted: 0 times · edited: 0 times - Apply on the employer's site: https://www.mongodb.com/careers/job/?gh_jid=8348102 - Skills listed (inferred): TypeScript, Python, Go, Java, MongoDB, LLMs, Distributed systems ## Pay and sponsorship - Posted pay: $106k–$209k per year (from the listing's pay field) - Market band for similar posted roles (New York, n 833): p25 $145k, median $180k, p75 $222k - H-1B filings at this company for similar roles, FY26: 53, median offered wage $149k ([US DOL OFLC LCA disclosure data](https://www.dol.gov/agencies/eta/foreign-labor/performance)) - Recognised sponsor (NL): registered as "MongoDB Netherlands B.V." (checked 2026-11-09, [register](https://ind.nl/en/public-register-recognised-sponsors/public-register-regular-labour-and-highly-skilled-migrants)) - Licensed UK sponsor: registered as "MongoDB UK Limited" (checked 2026-11-09, [register](https://www.gov.uk/government/publications/register-of-licensed-sponsors-workers)) ## Description (the employer's text) MongoDB’s Application Modernization Platform (AMP) helps organizations modernize legacy applications and move their workloads and associated data from relational databases to MongoDB. Our customers need a dependable way to bring analysis, transformation, testing, and migration capabilities into their modernization workflows. The Agentic Integrations team builds the interfaces that let AMP capabilities be discovered, invoked, and orchestrated from AI agents and development environments. We expose product services through consistent, well-specified tool and API surfaces, keep authentication and execution context correct across every boundary, and make each integration observable and safe to operate. Our work is what makes AMP usable from the assistants and coding agents our customers already run. We are looking for a Software Engineer 3 to build and operate these integrations. You will design tool and API surfaces for AMP services, implement them end to end, and work with product and platform engineers so that they behave predictably when a model calls them. Your impact will be measured by how reliably agents and developers can invoke AMP capabilities, and by how much integration work your components remove for other teams. We are looking to speak to candidates who are based in New York City for our hybrid working model. ### What you will do - Design and implement agent and developer facing integrations for AMP services, including tool definitions, API clients, and the adapters between them - Define clear input and output contracts for each integration, including validation, error semantics, and behavior when a call is malformed or only partially succeeds - Propagate authentication, authorization, and tenant context across integration boundaries so that agent-invoked calls carry no more privilege than the user they act for - Build the instrumentation needed to observe agent-driven traffic, including structured logs, traces, latency and failure metrics, and actionable diagnostics - Write production-quality code and the unit, integration, and end-to-end tests that demonstrate correctness, including tests for nondeterministic model behavior - Diagnose failures that span service, tool, and model boundaries, and drive them to root cause - Contribute integrations to shared SDKs, command-line tools, and agent frameworks used by other teams - Collaborate with product managers, platform engineers, and partner teams on scoped initiatives, and break work into incremental deliverables - Participate in code reviews, design reviews, and technical discussions that raise the quality of the team’s work - Interview candidates and mentor engineers and interns ### What you bring Required - At least four years of experience building and operating production software services - Proficiency in a backend language such as Python, Go, Java, or TypeScript, with the judgment to work effectively in more than one - Experience designing APIs or service interfaces, including versioning, error handling, and backward compatibility - Practical experience with authentication and authorization mechanisms such as OAuth, API keys, or service-to-service identity - Experience with automated testing, continuous delivery, and debugging in distributed systems - Strong written and verbal technical communication skills - A collaborative approach and the ability to make realistic assessments of project complexity and delivery risk Preferred - Experience building tool or integration surfaces for AI agents or large language models, including execution context, tool schemas, or guardrails against nondeterministic behavior - Experience with the Model Context Protocol or a comparable agent-to-tool integration standard - Experience shipping developer tooling such as CLIs, SDKs, or local servers that run inside customer-managed environments - Familiarity with application modernization, relational databases, MongoDB, or automated code transformation - Experience working with customers or field teams on integration and deployment issues - Experience mentoring engineers or interns and contributing to technical hiring --- Data: alder (https://alderhq.app). Cite https://alderhq.app/jobs/greenhouse%3Amongodb%3A8348102 and the date you read it. Observed facts come from the employer's own listing; location reach, level, family and skills are inferences.