Mid-Senior AI Fullstack Remote at OPTIVEUM sp. z o.o. | Massachusetts, US | Rezi

Mid-Senior AI Fullstack Remote at OPTIVEUM sp. z o.o.

Mid-Senior AI Fullstack Remote

OPTIVEUM sp. z o.o. · Massachusetts, US

Yesterday

Mid-Senior AI Fullstack Remote

OPTIVEUM sp. z o.o. · Massachusetts, US

a day ago
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About the Role

As an AI-Native Full-Stack Engineer, you will deliver features across mobile, web, backend, and AI-enabled product surfaces. Depending on your experience level, you will either independently deliver bounded vertical slices of the product or own meaningful product outcomes while improving architecture and mentoring a small, fast-paced team.

Responsibilities

  • Deliver and own high-value features from problem framing through production across React Native, Next.js, NestJS, TypeScript, Go and Python microservices, and GCP.
  • Diagnose and improve real product workflows spanning UI, APIs, data, media, background processing, and third-party services.
  • Strengthen the media lifecycle—including capture, upload, processing, playback, analysis, retrieval, and failure recovery—across mobile and web.
  • Evolve AI-assisted transcription and audio/video analysis with explicit quality measures, observability, privacy, and cost controls.
  • Use AI as an active engineering partner throughout discovery, design, implementation, testing, debugging, review, and documentation.
  • Write maintainable code, focused tests, useful instrumentation, and concise documentation.

Requirements

  • Solid TypeScript/JavaScript fundamentals and experience delivering production mobile or web applications.
  • Production depth in TypeScript/Node and ability to read, extend, and troubleshoot Go and Python microservices on GCP.
  • Working knowledge of APIs, data modeling, asynchronous workflows, testing, source control, and cloud deployment.
  • Familiarity with production LLM concerns such as context design, structured outputs, grounding, latency, cost, and privacy.
  • Experience with agentic workflows, structured tool use, MCPs, and evaluation.
  • Clear written and spoken English, dependability in a remote team, and readiness to be candid about unknowns.
  • Experience with media-heavy consumer products, social/community systems, creator platforms, or moderation is a major plus.
  • Gemini or Vertex AI experience on GCP is a strong advantage, though equivalent production experience with other model platforms also counts.

Skills

  • React Native
  • Next.js
  • NestJS
  • TypeScript
  • Go
  • Python
  • GCP
  • LLM
  • Gemini
  • Vertex AI

Location

  • Remote from Poland

Work Type

  • Full-time
  • Remote
  • B2B contract

Experience Level

  • Mid-level
  • Senior

Salary/Compensations

  • 125 - 130 PLN net/h

About the Company

  • US-based technology company building a live social platform for authentic connection and an emerging multimodal intelligence business for audience understanding.