GPU Acceleration Engineer - Calculation Engine

🎯 Main Mission

Massively accelerate the sparse calculation engine of a UK SaaS B2B - Enterprise Planning & Analytics company by porting critical algorithms from Rust/C++ to GPU (CUDA). Transform currently impossible calculations (requiring thousands of years of CPU time) into operations achievable in minutes.

📊 Context

UK SaaS B2B - Enterprise Planning & Analytics company manages planning models reaching 64 quadrillion cells with billions of time periods. Our Hyperblock/Polaris engine is currently limited by:

Legacy CPU architecture (Java/Rust/C++)
Memory constraints on massive sparse structures
Prohibitive calculation times on complex scenarios

Objective: Achieve performance gains of 100x to 1000x via GPU offloading.

🔧 Main Responsibilities

GPU Offloading

Port existing Rust/C++ algorithms to CUDA/GPU
Identify and extract critical calculation paths to accelerate
Optimize sparse matrix operations for GPU architecture
Develop performant Rust ↔ CUDA wrappers
Benchmark and validate performance gains

Memory Optimization

Design GPU memory management strategies for massive datasets
Implement efficient patterns for sparse structures
Optimize CPU ↔ GPU memory transfers
Manage GPU memory limitations on large-scale calculations

Technical Collaboration

Work with engineering team on integration
Document GPU porting patterns
Participate in code reviews and design reviews
Train the team on GPU best practices

💻 Technical Stack

Languages (in order of importance)

CUDA - Primary GPU development
Rust - Source language for algorithms to port
C++ - Legacy components and CUDA interoperability
(Java - platform context, no dev required)

Key Technologies

NVIDIA CUDA (toolkit, libraries: cuBLAS, cuSPARSE)
Rust (ownership model, unsafe blocks, FFI)
GPU Programming (kernels, memory hierarchy, optimization)
Sparse Matrix Operations (compression, storage formats)
Profiling Tools (nvprof, Nsight, perf)

✅ Required Profile

Essential Skills

GPU & CUDA (Essential)

✅ Significant CUDA programming experience (3+ years)
✅ Mastery of GPU kernel optimization
✅ Deep knowledge of NVIDIA GPU architecture (memory hierarchy, warps, occupancy)
✅ Experience with sparse calculations on GPU (cuSPARSE or equivalent)

Rust (Essential)

✅ Production Rust development
✅ Mastery of ownership and borrowing system
✅ Experience with unsafe Rust and FFI (Foreign Function Interface)
✅ Ability to analyze and refactor existing Rust code

C++ (Required)

✅ Modern C++ (C++11/14/17)
✅ C++ ↔ CUDA integration
✅ Templates and metaprogramming (asset)

Algorithms (Required)

✅ Data structures for scientific computing
✅ Sparse matrix algorithms (CSR, COO, etc.)
✅ Performance optimization and profiling
✅ Parallelization and concurrency concepts

Highly Valued Experience

🎯 Documented CPU → GPU porting projects
🎯 HPC experience (supercomputers, GPU clusters)
🎯 Memory optimization for large-scale datasets
🎯 Scientific computing or numerical simulation
🎯 Rust interop with other languages (C/C++/Python)

📍 Working Arrangements

Location & Travel

100% remote (France/Europe base preferred)
Occasional travel to London
- Frequency: ~1 week/month for team sprints
- Project kickoff + key reviews
- Intensive collaboration sessions

Start date: As soon as possible

GPU acceleration engineer

Job Description