full stack developer for PDF editing

HireHi

United States

Remote

USD 120,000 - 180,000

Full time

2 days ago
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Benefits offered by this job

Educational budget
Regular knowledge-sharing sessions
Clear growth path

Job summary

HireHi ищет инженера-разработчика AI/ML для работы над онлайн-платформой pdfFiller и сопутствующими сервисами. Ваша задача — владение фичами от требований до продакшена, обеспечение качества и мониторинг поведенческих особенностей LLM.

Кандидат будет работать с LangGraph/LangChain, RAG и векторным поиском (pgvector), стримингом, observability и документацией по архитектуре (C4/ADR). Требуется опыт оценки LLM и поддержка модернизации стеков.

Qualifications

  • Опыт работы с LangGraph или LangChain, оркестрацией агентов и state-машинами.
  • Опыт в RAG и векторном поиске (pgvector).
  • Знакомство со SSE или аналогичными потоковыми протоколами.
  • Опыт инструментов наблюдаемости: OpenTelemetry и Grafana.
  • Опыт оценки LLM, наборы данных для валидации и роли судьи.
  • Опыт написания технической документации (C4, ADR).

Responsibilities

  • Владение фичами от требований до продакшена и мониторингом.
  • Контроль качества: unit/integration тесты и кейсы для поведения LLM.
  • Работа с регрессиями промптов и нестабильностью вывода.
  • Обзор кода и документации для консистентности.
  • Мониторинг продакшена и реагирование на инциденты.
  • Предложение улучшений процессов и технологий.
  • Разработка функций: вызов инструментов, стриминг и RAG.
  • Работа с указанным бэкендом/фронтендом/инфраструктурой.

Skills

LangGraph
LangChain
Agent orchestration
State machines
RAG
Vector search
pgvector
SSE
OpenTelemetry
Grafana stack
LLM evaluation
C4/ADR docs

Job description

Описание:

pdfFiller is an online platform for creating, editing, and signing PDF documents. It enables over 10 million users each month to create and edit PDFs, send them for signing, and securely store documents in one application. The team builds an AI assistant that understands and acts on users’ documents, an MCP server that exposes pdfFiller’s capabilities to external AI clients, and AI-powered improvements to existing product features.

Задачи:
  • Own features end to end, from requirements to production and post-release monitoring of edge cases
  • Own the automated quality of delivered work, including unit and integration tests and evaluation cases for LLM behavior
  • Treat prompt regressions, evaluations, and non-determinism as everyday engineering concerns
  • Review code and documentation to maintain codebase consistency
  • Monitor production and respond to incidents as part of the duty rotation
  • Propose improvements to processes, tooling, and legacy code as part of the team’s ongoing modernization
  • Build tool-calling, streaming, and RAG features, owning them from problem definition to production metrics
  • Work with the specified backend, frontend, and infrastructure stack
Требования:
  • Experience with LangGraph or LangChain, agent orchestration, and state machines
  • Experience with RAG and vector search using pgvector
  • Familiarity with SSE or other streaming protocols
  • Experience with observability tools such as OpenTelemetry and the Grafana stack
  • Experience with LLM evaluation, including evaluation datasets and LLM-as-judge
  • Experience writing technical documentation, including C4 and ADR

Будет плюсом: experience with LangGraph or LangChain, agent orchestration, and state machines, experience with RAG and vector search (pgvector), familiarity with SSE or other streaming protocols, experience with OpenTelemetry and the Grafana stack, experience with LLM evaluation and evaluation datasets, experience writing technical documentation (C4 model, ADRs)

Условия:
  • Educational budget
  • Regular knowledge-sharing sessions
  • Clear growth path
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