---
title: 'Senior Compiler Engineer at OLIX'
canonical: 'https://feeny.ai/job/senior-compiler-engineer-olix-london-k03ensv4sz6s'
type: 'job'
last_seen: '2026-11-01'
---

# Senior Compiler Engineer at OLIX

- **Company:** OLIX
- **Location:** London, United Kingdom
- **Compensation:** £210k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-10-26
- **Last confirmed live:** 2026-11-01
- **Apply:** https://jobs.ashbyhq.com/olix/e88bb5b6-1870-4bb8-b48b-9a029c4e1d1b

## Job description

## About OLIX

AI is growing faster than any technology in history and the explosion in demand has created a massive infrastructure gap; we can no longer build chips or power stations fast enough to keep up. The industry is still leaning on a ten-year-old hardware blueprint that has reached its limit. A new paradigm that is faster and more efficient will be the biggest economic opportunity of the next century and create the most important company of the next decade. The OLIX Decode Accelerator 1 (DX-1) is the first accelerator architected specifically for decode. Rack-scale co-design of logic, data movement, packaging, optics and interconnect enables a step change in system level performance.

## The Role

We’re searching for Senior Compiler Engineer to join the team building the ML backend (compiler, run-time, and debugger) for our next-generation hardware that connect PyTorch, Tensorflow, JAX, and MXNet down to our low-level kernel drivers. Your mission will be to create seamless support for a broad ecosystem of large AI models, and ensure we are pushing the limits of their performance envelope by closely partnering with hardware and modelling teams to understand device trade-offs.

## Responsibilities

- Project Ownership: Own and deliver projects on your team's roadmap that unlock key high-impact technical and business milestones that drive the success of Olix.
- Architect & Build: Design and implement our compiler, runtime, and debugger for PyTorch, TensorFlow, JAX, and MXNet on custom hardware.
- Optimise Performance: Apply advanced techniques (layout, fusion, scheduling, tiling) to eliminate bottlenecks and maximise throughput.
- Mentor & Encourage Standards: Lead code reviews, coach peers, and uphold best practices in ML backend and performance engineering for your team.
- Guide Team Direction: Stay ahead of GPU, AI accelerator trends; propose and prototype innovations.

## Skills & Experience

- 5+ years of experience in software engineering with a focus on C/C++ programming.
- Deep expertise in ML framework internals, compilers, low-level programming, and optimisation techniques.
- Deep expertise in optimising Tensorflow, PyTorch or JAX deep learning models.
- Deep expertise with multiple toolchains like LLVM, OpenXLA/XLA, MLIR, TVM.
- Practical experience applying machine learning in high-performance computing contexts.
- Strong problem-solving skills and the ability to think critically and creatively.
- Experience in high-pace, dynamic work environments.
- Excellent teamwork and communication skills, with the ability to collaborate effectively with cross-functional teams.
- Bachelor's degree in computer science, electrical engineering, telecoms engineering, mathematics, or a related field.
- Personal projects are a key differentiating factor and hold more weight than other requirements.

## Compensation & Equity

- Competitive Salary: Commensurate with your experience, skills, and location
- Equity & Ownership: Meaningful stock options. You’re not just joining the mission; you’re owning a piece of it
- Proximity Bonus: We value your time. To minimise your commute and maximise your life, we offer an annual Living-Local Bonus if your residence is within 20 minutes of the office
- Retirement Benefits: Employer-contributed retirement plans to help you build long-term financial security.

Due to U.S. export control regulations, candidates’ eligibility to work at OLIX depends on their most recent citizenship or permanent residency status. We are generally unable to consider applicants whose most recent citizenship or permanent residence is in certain restricted countries (currently including Iran, North Korea, Syria, Cuba, Russia, Belarus, China, Hong Kong, Macau, and Venezuela). Applicants who have subsequently obtained citizenship or permanent residency in another country not subject to these restrictions may still be eligible.

## About OLIX

## Company Overview
- **One-liner**: OLIX, formerly known as Flux, is building a new compute paradigm using an SRAM-architecture integrated with photonics to solve the fundamental memory, energy, and speed constraints in deploying frontier AI.
- **Entity Type**: Private, Series A (raised $220M in February 2026)
- **Headquarters**: London, United Kingdom
- **Founded**: 2024
- **Founders**: James Dacombe (CEO)

## Core Business
- **Primary industry/industries**: Semiconductor Manufacturing, AI Infrastructure, Photonic Computing
- **Target customers**: Enterprise AI labs, hyperscalers, and frontier AI model developers requiring high-throughput, low-latency compute
- **Mission or purpose statement**: "Solving the most consequential problem in the deployment of frontier AI" by building infrastructure that overcomes the limits of current GPU-based memory architecture.

## Products & Services
- **OLIX Compute Platform**: A new hardware architecture combining SRAM-based compute with integrated photonics, designed to surpass HBM-based systems on throughput per megawatt and total cost of ownership (TCO), while delivering significantly better interactivity and latency than silicon-only SRAM architectures.

## Market Standing
- **Valuation**: Unicorn status; estimated $1–2.5B (latest round Feb 2026, per Dealroom)
- **Key Metric**: $220M in total funding (Series A, led by Hummingbird Ventures, with participation from Crane Venture Partners and others)
- **Notable Investors/Partners**: Hummingbird Ventures (Series A lead), Crane Venture Partners (pre-seed lead), and 4+ additional investors across seed and Series A rounds.
- **Growth Signals**: Headcount grew 420% YoY to 70 employees; operating in 6 countries (UK, US, Canada, Armenia, Romania, Germany); active job postings surged 188.9% YoY with 26 open roles as of mid-2026.

## Competitive Advantages
- **Unique photonic-SRAM architecture**: A contrarian bet that GPU-based approaches cannot simultaneously deliver high throughput and high interactivity at low cost due to physical design constraints.
- **Talent density**: Heavy hiring from top compute and AI companies (Apple, Amazon, Arm, Google, Tenstorrent).
- **First-mover in inference-era compute**: Targeting a fundamental bottleneck as frontier models require vastly more tokens per inference.

## Strategic Focus
- **Scale teams**: Aggressively hiring across engineering (ASIC/photonic design, FPGA, optics, process integration), operations, and legal in London, Austin, Toronto, Bristol, and San Francisco.
- **Prototype and productize**: Moving from architecture conception into hardware integration and manufacturing (roles include Process Integration Engineer, Opto-Mechanical Engineer, Layout Engineering Manager).
- **Transition from Flux branding**: Rebranded to OLIX in January 2026 to signal a new phase of company identity and scale.

## Why Work Here
- **In-person culture**: OLIX is an in-person company. They incentivize living within a 20-minute commute of the office with a £24,000 annual living-local bonus.
- **Compensation**: Benchmark-leading base salary, meaningful stock options (early employees build significant ownership), and workplace pension.
- **Benefits**: Comprehensive BUPA medical & dental (with Medical History Disregarded), 25 days holiday + UK bank holidays + birthday leave, meals on-site, cycle-to-work scheme, nursery scheme, visa sponsorship and relocation support.
- **Engineering environment**: M4 Mac standard (M5 Pro upgrade for engineering), on-site 3D-printing lab, noise-cancelling headphones, fully ergonomic workstation, and a culture of deep focus.
- **Impact**: "You will work with some of the best minds in photonics, systems, and compute on one of the defining problems of our era."

## Sources
1. [olix.com](https://olix.com/)
2. [olix.com/careers](https://olix.com/careers)
3. [LinkedIn - OLIX](https://www.linkedin.com/company/olix-computing)
4. [Dealroom - OLIX](https://dealroom.co/companies/olix-1/)
5. [jobs.ashbyhq.com/olix](https://jobs.ashbyhq.com/olix)

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