Mid-Senior Fullstack Remote

OPTIVEUM sp. z o.o. • Capon Bridge, WV

3d • PLN 125 - PLN 130 • Remote

About The Position

Optiveum is seeking a Mid/Senior Full-Stack Engineer for a long-term, engaging project. This role involves working on a live social platform and an emerging multimodal intelligence platform. The engineer will own high-value features from conception to production, leveraging AI tools to enhance development. The client is a US-based technology company, and the team operates asynchronously with occasional meetings for alignment.

Requirements

• Solid TypeScript/JavaScript fundamentals with substantial experience delivering and operating customer-facing mobile or web applications.
• Production depth in Node.js and at least one major product surface (such as React Native or Next.js).
• Working knowledge of APIs, data modeling, asynchronous workflows, testing, and cloud deployment (GCP preferred).
• Ability to read, extend, and troubleshoot Go and Python microservices.
• Clear written and spoken English, dependability in a remote team, and a direct, low-ego approach to problem-solving.

Nice To Haves

• Experience with media-heavy consumer products, social/community systems, creator platforms, or in-app purchases.

Responsibilities

• Deliver and own features 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.
• Use AI tools (e.g., Gemini, ChatGPT) as an active engineering partner for coding, testing, debugging, and documentation—verifying outputs rather than relying on it as a simple answer machine.
• Write maintainable code, focused tests, useful instrumentation, and concise documentation.

Benefits

• Salary: 125 - 130 PLN net/h (Please note: The final B2B contract will be signed in USD at the current exchange rate).
• Contract: B2B directly with Optiveum.
• Start: ASAP, long-term project.
• Type of work: 100% Remote from Poland.
• Working hours: Full-time, flexible hours (occasional late afternoon/evening meetings required for US time zone alignment).

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed