Software Engineer, AI Foundation Model

Overview

About Merlin:
Merlin is a venture backed aerospace startup building a non-human pilot to enable both reduced crew and uncrewed flight. Backed by some of the world’s leading investors, Merlin is scaling alongside our customers to begin leveraging autonomy today to solve some of aviation’s biggest challenges.

About you:

You are a senior individual contributor with deep expertise in building the systems that make large-scale machine learning possible in production. You have experience in selecting optimum foundation models, adapting/tuning for target application needs, designing data pipelines that handle real-world messiness, building scalable training infrastructure, and creating evaluation frameworks that give engineers confidence in their development. You care about software engineering as much as you care about AI models — great AI systems are only as good as the infrastructure underneath them.

You enjoy operating with significant autonomy, influencing technical decisions across multiple teams, and mentoring engineers who are earlier in their careers. Most importantly, you want to work on a problem that genuinely matters: putting safe autonomous aircraft into the skies.

• Technically strategize on foundation model selection, refactor, design, build, and maintain Merlin's core AI models, training and inference infrastructure, including distributed training pipelines, experiment tracking, and model registry systems.
• Define and drive standards and benchmarks for model evaluation, benchmarking, and regression testing to ensure AI systems meet safety and performance thresholds before deployment.
• Architect and own the foundational data pipeline that ingests, processes, labels, and versions flight data for use across all autonomy and AI teams.
• Identify and resolve systemic technical bottlenecks that slow down AI development velocity across Merlin's engineering organization.
• Collaborate with AI infra, Simulation, and Flight Software teams to define interfaces and shared abstractions that make the broader stack more coherent and maintainable.
• Mentor, build and technically guide junior and mid-level engineers on the AI Foundation team, conducting design reviews and raising the overall quality of the team's output.
• Lead technical scoping and estimation for large AI foundational model projects, breaking ambiguous requirements into actionable engineering plans.
• Evaluate and adopt relevant open-source tooling, frameworks, and research, contributing back where appropriate.
• Document architecture decisions, system designs, and operational runbooks to a standard that supports safety review and long-term maintainability.
• Contribute to hiring by conducting technical interviews and helping define the engineering bar for the AI Foundation team.

• 8+ years of software engineering experience, with a substantial portion focused on state of the art and next-gen AI model development, ML infrastructure, MLOps, data engineering, or AI platform development.
• Experience in development of the AI-first Autonomy software stack that includes Perception, Behavior Planning, Prediction and Actuation (based on Transformer architectures).
• Demonstrated ability to design and deliver large-scale, production-grade systems independently — from initial architecture through deployment and operation.
• Deep proficiency in PyTorch, Tensor Flow and at least one systems language such as C++, C, Rust, or Go.
• Hands-on experience with distributed training frameworks (Python extensions, JAX, or equivalent) and the infrastructure required to run them reliably at scale.
• Experience in onboarding trained models into edge environments consisting of High Performance Compute System-on-Chips.
• Strong background in data pipeline design, including streaming and batch processing, data versioning, and handling high-volume, heterogeneous sensor data.
• Experience building model evaluation and validation frameworks leveraging MLOps frameworks (like Weights & Biases, MLflow, etc.) that go beyond accuracy metrics to assess real-world reliability and safety-relevant behavior.
• Proven track record of influencing technical direction across teams and…