1851 Labs
Machine Learning Engineer
1851 LabsCanada10 hours ago
Full-timeEngineering, Information Technology

Mission

Make creation the world’s favorite entertainment.


About GenTube

Imagination to images in milliseconds. Already 10M+ monthly creations and accelerating. We believe AI creation is the next social medium — as big as video, as habitual as scrolling.


The Opportunity

We’re at the start of a generational shift. Just as YouTube unlocked the world’s videos and TikTok turned short-form into the default entertainment, GenTube is making AI creation the medium of our time. A billion people will move from passive consumption to active creation — and you’ll be one of the engineers building the ML backbone that makes it instant and magical.


The Founders

Josh and Mo scaled platforms to 100M+ users and led a $150M+ AI exit to Microsoft. Now they’re building the defining consumer AI company of the creation era. We’re well-funded with a long runway, and you’re joining the founding team.


The Role

You’ll own the ML systems that power instant, high-quality creation at scale. From sub-second inference pipelines to personalization engines, your work will define how billions experience AI creativity.


What You’ll Do

  • Core ML Infrastructure — Build inference pipelines serving millions of generations weekly; design real-time streaming for diffusion, LLMs, multimodal systems; optimize latency across serving, batching, caching, routing.
  • Model Performance — Adapt foundation models (SD, Flux, LLMs) for creation; implement quantization, distillation, pruning; experiment with LoRAs, ControlNets, adapters for style and personalization.
  • Intelligence Layers — Build ranking, recommendation, and personalization engines; content understanding with embeddings, similarity search, classification; moderation systems that keep outputs safe.
  • Production Systems — Scale GPU infra from thousands to millions of daily generations; profile bottlenecks and optimize utilization; implement A/B testing for model variants; monitor drift, quality and latency p99s.
  • Relentless Experimentation — Ship new model variants daily; A/B test speed vs. quality; build feedback loops from user behavior to improve outputs.


What We’re Looking For

  • ML Engineering Depth — Experience shipping production ML at scale; strong with generative models (diffusion, LLMs, multimodal); PyTorch/JAX fluency; inference serving (Triton, Ray, TorchServe).
  • Systems & Infrastructure — Expertise in inference optimization, batching, quantization, model compilation; GPU infra (CUDA, memory management, multi-GPU serving); backend skills in Python/FastAPI, async systems, cloud (AWS/GCP/Azure).
  • Product-Focused ML — Care about user experience, not just benchmarks; design for sub-second latency, graceful degradation, and delight.
  • Mindset — Startup DNA, fast-moving, scrappy; performance obsessed; quality focused; empathetic to creator intent and expectations.


Bonus

  • Built and scaled ML products for consumer apps
  • Experience with personalization or recommendation systems
  • Open source or side projects showing technical creativity


Why Join

  • Be Early — Like YouTube 2005 or TikTok 2018, but for AI creation.
  • Own It — our models define latency, quality, and magic for millions.
  • Learn From Operators — Founders who’ve scaled ML products to 100M+ users.
  • Win Big — Significant equity, competitive comp, asymmetric upside.
  • Invent the Future — Solve unsolved inference problems at the AI × consumer edge.


Details

  • Location: Toronto — downtown office, high-energy, creative hub
  • Compensation: Depending on background, skills and experience, the expected annual salary range for this position is $100K–$200K + significant equity
  • Benefits: We offers generous health, dental, and vision benefits, unlimited PTO, paid parental leave, and relocation support as needed.
  • Visa: Available support for top candidates{


If you want to define the ML infrastructure that makes creation instant, delightful, and accessible to billions — this is your moment. Join us before GenTube becomes the next billion-person creation platform. We encourage you to apply even if you do not believe you meet every single qualification. 



Key Skills

Ranked by relevance