Full-Time

Full-Time

Full-Time

Contractor

Contractor

Contractor

Internship

Internship

Internship

Software Engineer — Product

Software Engineer — Product

Software Engineer — Product

Gangnam, Seoul

Gangnam, Seoul

About the Role

About the Role

We are looking for a Software Engineer who wants to reimagine how people use AI and help create and launch entirely new user experiences. You’ll partner closely with our world-class research and infrastructure teams to bring cutting-edge AI to life in real products.

This is a high-impact, highly creative role. You’ll be the Swiss Army Knife of product engineering—comfortable building intuitive UX, performant APIs, or production-grade backend systems as needed. You should thrive in ambiguity and be excited about rapidly building and iterating on ideas that may define a new category of interaction.

Candidates will be expected to be physically based in Seoul, but we will provide assistance with the Visa application process if needed. We will be offering positions from 4-month internships, part-time student researcher (for graduate students in Korea), 1-year visiting researcher, to full time roles.

We are looking for a Software Engineer who wants to reimagine how people use AI and help create and launch entirely new user experiences. You’ll partner closely with our world-class research and infrastructure teams to bring cutting-edge AI to life in real products.

This is a high-impact, highly creative role. You’ll be the Swiss Army Knife of product engineering—comfortable building intuitive UX, performant APIs, or production-grade backend systems as needed. You should thrive in ambiguity and be excited about rapidly building and iterating on ideas that may define a new category of interaction.

Candidates will be expected to be physically based in Seoul, but we will provide assistance with the Visa application process if needed. We will be offering positions from 4-month internships, part-time student researcher (for graduate students in Korea), 1-year visiting researcher, to full time roles.

Important problems we’re working on

Important problems we’re working on

  • New UX for AI: Designing and building novel user interfaces that make interacting with powerful AI models intuitive, natural, and even delightful. This includes everything from web-based creative tools, voice or chat-driven applications, to mobile agents controlled by LLMs that can take real-world actions on a user’s behalf.

  • Fast Prototyping to Productization: Rapidly testing product ideas and owning the end-to-end engineering required to bring them to production.

  • Deep Collaboration with Research: Working with model researchers to bridge ideas and interfaces, and help shape product direction based on emerging capabilities.

  • System Design: Building performant, maintainable systems and APIs that support complex interactions and scale smoothly with user demand.

  • New UX for AI: Designing and building novel user interfaces that make interacting with powerful AI models intuitive, natural, and even delightful. This includes everything from web-based creative tools, voice or chat-driven applications, to mobile agents controlled by LLMs that can take real-world actions on a user’s behalf.

  • Fast Prototyping to Productization: Rapidly testing product ideas and owning the end-to-end engineering required to bring them to production.

  • Deep Collaboration with Research: Working with model researchers to bridge ideas and interfaces, and help shape product direction based on emerging capabilities.

  • System Design: Building performant, maintainable systems and APIs that support complex interactions and scale smoothly with user demand.

Responsibilities

Responsibilities

  • Drive design and development of product features

  • Build fast, interactive, and accessible frontend experiences powered by AI

  • Collaborate closely with design, research, and infrastructure teams to integrate AI models into intuitive workflows

  • Own and maintain highly complex systems leveraging AI models - ranging from complex model features (search, deep research, agentic, function calling) to various model capabilities (MoE, Multi-Modal, embedding etc)

  • Help define technical and product direction in a fast-evolving domain

  • Drive design and development of product features

  • Build fast, interactive, and accessible frontend experiences powered by AI

  • Collaborate closely with design, research, and infrastructure teams to integrate AI models into intuitive workflows

  • Own and maintain highly complex systems leveraging AI models - ranging from complex model features (search, deep research, agentic, function calling) to various model capabilities (MoE, Multi-Modal, embedding etc)

  • Help define technical and product direction in a fast-evolving domain

You may be a good fit if you

You may be a good fit if you

  • Have 5+ years of industry software engineering experience, including experience shipping real products

  • Are excited to work on first-of-its-kind interfaces powered by AI

  • Are comfortable working across the stack (e.g. TypeScript/React, Python, REST/gRPC APIs, Android, MCP)

  • Have strong product intuition and care deeply about user experience

  • Move fast, write clean code, and thrive in a highly collaborative, exploratory environment

  • Have 5+ years of industry software engineering experience, including experience shipping real products

  • Are excited to work on first-of-its-kind interfaces powered by AI

  • Are comfortable working across the stack (e.g. TypeScript/React, Python, REST/gRPC APIs, Android, MCP)

  • Have strong product intuition and care deeply about user experience

  • Move fast, write clean code, and thrive in a highly collaborative, exploratory environment

Strong candidates may also

Strong candidates may also

  • Have experience designing or building interactive tools, creative applications, or experimental UX

  • Have built or contributed to products involving LLMs or other machine learning systems

  • Bring a background in design, HCI, or user research alongside engineering skills

  • Be fluent in both Korean and English (as our team is highly international)

  • Have experience designing or building interactive tools, creative applications, or experimental UX

  • Have built or contributed to products involving LLMs or other machine learning systems

  • Bring a background in design, HCI, or user research alongside engineering skills

  • Be fluent in both Korean and English (as our team is highly international)

How to Apply

How to Apply

If you are passionate about technology and excited about joining a forward-thinking company, we would love to hear from you! Please send your resume to recruit@trillionlabs.co with the subject line "Software Engineer Application - [Your Name]".

If you are passionate about technology and excited about joining a forward-thinking company, we would love to hear from you! Please send your resume to recruit@trillionlabs.co with the subject line "Software Engineer Application - [Your Name]".

About Trillion Labs

About Trillion Labs

About Trillion Labs