Source Job

Canada

  • Turn PRDs, UX mockups, and loosely defined ideas into cohesive working products.
  • Build responsive, polished full-stack web applications with meaningful LLM-powered features.
  • Develop agentic workflows and orchestration logic for production systems.

React Next.js LLM APIs Backend Development

20 jobs similar to Senior Full-Stack AI Product Engineer

Jobs ranked by similarity.

Global

  • Build and ship full-stack, AI-native products, internal platforms, prototypes, and production applications.
  • Design and implement agentic AI applications, LLM workflows, RAG systems, document-processing pipelines, and other applied AI solutions.
  • Translate ambiguous business, product, or client needs into scalable technical systems.

Infinity Constellation is a holding company building full-stack AI businesses, ranging from rapidly prototyping new products to embedding with companies to solve real-world problems. We are a focused network of builders who move quickly and create leverage across companies with AI at their core.

Global

  • Build full-stack features across React, React Native, and Node.js, including AI chat UI and workflows.
  • Design and implement AI systems such as tool-using agents, RAG, and human-in-the-loop flows.
  • Ensure system reliability, scalability, and performance while mentoring team members.

WorkHero is building the AI-powered back office for the skilled trades, starting with the HVAC industry. They are a small, senior team with deep experience in AI, product, and the trades.

$105,000–$115,000/yr
US

  • Design, develop, and maintain scalable full-stack applications using Java, Node.js, React, and cloud services.
  • Integrate AI and LLM capabilities using platforms like OpenAI and AWS Bedrock.
  • Collaborate with cross-functional teams in an Agile environment to deliver secure, reliable solutions.

Mind Computing provides software development services, including support for government projects like the Department of Veterans Affairs. They offer a collaborative culture with benefits such as PTO, 401(k), and remote work options.

UK 7w PTO

  • Build production-ready AI-powered products integrating LLMs, RAG, and agentic workflows into real-world financial processes.
  • Develop scalable event-driven microservices and APIs with Node.js, TypeScript, and modern React frontends.
  • Architect cloud-native systems on AWS and implement monitoring, evaluation, and observability for production AI systems.

Aveni is redefining how financial institutions use AI by building production-ready agentic systems that replace fragmented processes. Backed by investors including Puma Private Equity, the company completed one of Scotland's largest Series A rounds and is scaling its team to meet growing demand.

US Canada 6w PTO 26w maternity 26w paternity

  • Design and build full-stack features for data upload, knowledge bases, and agent extensibility across North's AI platform.
  • Own features end-to-end from technical design through shipping, testing, and iteration with a focus on minimal code in low-resource environments.
  • Collaborate with product and UX teams to validate requirements and raise engineering standards through code review and mentoring.

Cohere is a security-first enterprise AI company building foundation AI models and end-to-end products for enterprises. We are a global team of researchers, engineers, and designers headquartered in Toronto with offices worldwide.

Canada

  • Build and enhance an internal multi-model AI platform with agents, automations, and MCP tool integrations in a senior full-stack role.
  • Develop production-quality web applications and an internal MCP marketplace for authenticated AI tool access across multiple clients.
  • Promote AI adoption across engineering through technical guidance, demonstrations, and reusable tools, collaborating with cross-functional stakeholders.

This partner company focuses on building AI-first solutions that improve engineering teams' workflows. They foster a collaborative, remote-first environment with a culture of experimentation, continuous learning, and knowledge sharing.

$1,500–$4,000/mo
US

  • Build and maintain frontend applications using React 19 and Next.js App Router.
  • Develop dashboards and data-heavy interfaces with modern React architecture.
  • Integrate AI-powered workflows and LLM functionality into production apps.

Hire Hangar connects top talent with vetted employers and offers competitive pay and real growth opportunities. It focuses on building long-term careers with fast-growing global companies.

US

  • Design and develop end-to-end web applications using React and Python, integrating AI-powered capabilities for document management.
  • Build scalable backend services and APIs, and connect with search platforms and data pipelines.
  • Collaborate with experts to optimize performance, write maintainable code, and contribute to continuous improvement.

Our partner builds modern AI-powered applications that transform how enterprises manage and interact with complex information. They offer a collaborative, remote environment focused on innovation and professional growth.

$58,400–$80,300/yr
Canada 4w PTO

  • Develop full stack features for an AI-powered web application using Python, React, Redux, PostgreSQL, and AWS.
  • Integrate AI models and APIs for tasks like document processing, data extraction, and recommendation engines.
  • Participate in architecture planning, code reviews, and take ownership of feature development end-to-end.

PolicyMe is Canada's leading digital insurance solution, offering straightforward and affordable financial protection for families. They are a remote-first, Toronto-based startup that has sold over $10 billion in insurance coverage since 2018, attracting top talent from across Canada.

Brazil

  • Design, develop, and optimize user experiences across consumer applications and internal healthcare platforms using Next.js, React, and TypeScript.
  • Build AI-powered user experiences including conversational interfaces and streaming AI responses, leveraging tools like Cursor, GitHub Copilot, and Claude.
  • Collaborate with cross-functional teams, contribute to shared component libraries, and ensure performance, accessibility, and security standards.

They build modern digital healthcare experiences using cutting-edge frontend technologies and AI-powered development workflows. They are a remote-first organization focused on ownership and autonomy, with a collaborative team of experienced professionals.

Global 6w PTO 26w maternity 26w paternity

  • Build and ship features for North, Cohere's AI workspace platform.
  • Develop autonomous agents that interact with sensitive enterprise data.
  • Collaborate with researchers to productionize state-of-the-art models and techniques.

Cohere is a security-first enterprise AI company that builds cutting-edge foundation models and products for business. Headquartered in Toronto with offices globally, the company has a team of researchers, engineers, and designers passionate about their craft.

Canada 4w PTO

  • Build and architect full-stack systems (Vue.js, PHP/Laravel) to power the digital healthcare ecosystem.
  • Improve platform reliability through rigorous testing, observability, and system optimization.
  • Mentor junior team members and collaborate cross-functionally with product and design teams.

Felix is a digital healthcare company that puts patients in control of their health, providing Canada's first end-to-end online healthcare experience. Founded in 2019, they are an early-stage technology company with a collaborative, high-performing team and a remote-first culture.

US

  • Design and build user-facing systems and integrations for secure, next-gen interfaces.
  • Own the frontend experience layer, converting complex operator requirements into reliable UIs.
  • Work hands-on building and operating systems in partnership with product designer and engineering teams.

Ruya AI is a venture-backed defense-tech company building AI-native intelligent software for sovereign institutions. They are headquartered in Massachusetts with offices across the US, Europe, and the Middle East, and are expanding their engineering team with people who demonstrate strong ownership and judgment.

LATAM

  • Build and ship MVPs fast, working hands-on with LLMs, APIs, and AI-assisted workflows.
  • Use tools like Copilot, Cursor, GPT, and Claude daily to ship AI-powered product inside high-growth startups.
  • Work fully remote with flexible schedules, part-time or side gig, with some US time overlap.

Futureproofing is a talent platform focused on embedding high-caliber engineers into startups building AI-driven products. They match intentionally, not through keyword filtering, and focus on output, ownership, and shipping speed in a developer-first model.

$95,090–$142,450/yr
Canada

  • Build modern frontend experiences for domain discovery using React and Node.js.
  • Lead projects end-to-end from problem definition to launch, measurement, and optimization.
  • Mentor peers and improve engineering quality through automation and AI-assisted development.

The company helps users find relevant domain names and products. It is a small, fast-moving team with an entrepreneurial culture and remote work environment.

Global

  • Lead and mentor a team of senior software engineers while driving AI-assisted development practices.
  • Partner with Product, Design, and Operations to translate business requirements into scalable technical solutions.
  • Design and evolve architectures across frontend, backend, data, cloud, and AI systems.

The company is a technology partner building AI-enabled products and modern software platforms. They foster a remote-first, globally distributed culture with a focus on engineering excellence and innovation.

US Europe Middle East

  • Build asynchronous Python/TypeScript services with FastAPI, Pydantic, and asyncio.
  • Develop agent orchestration, subagent delegation, tool calling, and structured outputs.
  • Create behavioral evals and regression datasets using Langfuse.

We are a venture-backed defense-tech company building AI-native intelligent software for sovereign institutions and their affiliated organizations. We have offices across the U.S., Europe, and the Middle East, and we are expanding our engineering team with people who demonstrate strong ownership and sound judgment.

$3,000–$4,200/mo
LATAM Africa Eastern Europe

  • Develop responsive UIs using Next.js, React, TypeScript, and Tailwind CSS.
  • Build backend services with TypeScript, Convex, and serverless functions.
  • Integrate Claude LLM APIs for AI-powered features and automation.

They are a growing technology company building modern web applications powered by real-time data and AI-driven functionality. The company's size and culture are not specified in the posting.

Global 4w PTO

  • Build intuitive, performant frontends in React and shape the platform's UI/UX architecture.
  • Implement backend logic and integrate with third-party APIs as part of full-stack feature delivery.
  • Participate in architectural decisions, research, and design for scalable, maintainable software.

5Blue Software builds an AI-powered B2B SaaS platform that automates security, risk, and compliance workflows for organizations worldwide. It is a fast-growing product company with a strong partnership-driven approach and a collaborative international team.

US

  • Architect and build clean, responsive user interfaces in React for complex document handling and interactive workflows.
  • Write performant Python services and RESTful APIs to connect interfaces with search engines and data pipelines.
  • Integrate workflows with Vertex AI Search, optimizing document indexing, query retrieval, and agentic AI responses.

66degrees is an end-to-end AI transformation partner that helps enterprises turn complex data into strategic assets. The company is a convergence of several successful firms in cloud, AI, and data, with a culture that values innovation and professional growth.