--- title: 'Forward Deployed Engineer at Isidor' canonical: 'https://feeny.ai/job/forward-deployed-engineer-isidor-london-3zrhbf7hpk38' type: 'job' last_seen: '2026-09-12' --- # Forward Deployed Engineer at Isidor - **Company:** Isidor - **Location:** London, United Kingdom - **Posted:** 2025-10-20 - **Last confirmed live:** 2026-09-12 - **Apply:** https://job-boards.greenhouse.io/isidor/jobs/4048584009 ## Job description ## About Us Isidor is building the foundation of reliable AI. We believe that the next leap in AI depends as much on understanding and measuring model behavior as it does on model size. To make AI trustworthy, we need systems that verify outputs, benchmark performance, and automate evaluation across billions of examples. Isidor was founded by engineers and researchers who care deeply about precision, transparency, and scientific rigor. We are a small, fast-moving team working directly with frontier AI labs and enterprise to make evaluation as measurable and reproducible as training itself. Founded in September 2025, Isidor raised an oversubscribed $3.6m pre-seed from leading funds including Gradient Ventures, futurepresent and Seedcamp, along with angels from Google DeepMind, Perplexity, Motive, Episode 1 and more. ## The Role As a Forward Deployed Engineer, you will work directly with frontier AI labs and enterprise, to design and ship the infrastructure behind their most critical data workflows. You will embed with research teams, understand their challenges, and build the pipelines, tools, and automations that move their experiments forward. This is not a traditional backend role. You will translate ambiguous research needs into high-leverage technical systems, blending engineering with problem-solving, and seeing the impact of your work in real time. You will ship fast, iterate constantly, and help shape how the world’s most advanced models are trained and evaluated. ## What We’re Looking For - Highly-driven, self-starters with strong proficiency in Python, including data manipulation, scripting, and automation (new grads/juniors with relevant intern/professional experience encouraged) - Experience with data wrangling and preprocessing, cleaning raw data, and preparing it for ingestion into machine learning systems - Familiarity with machine learning workflows, including feature engineering, dataset curation, and evaluation pipelines - Advanced coursework in mathematics and/or evidence of strong applied mathematical reasoning - Strong research and communication skills: ability to translate ambiguous research problems into robust, scalable technical solutions ## What You'll Do - Design custom data pipelines and integrations to collect, clean, and process high-quality training and evaluation data - Build technical infrastructure for advanced quality control workflows, including model-in-the-loop and human-in-the-loop systems - Develop tools to automate experiments that improve model safety, interpretability, and human alignment - Prepare datasets for ingestion into machine learning pipelines, ensuring consistency, accuracy, and reliability - Collaborate with applied AI teams and top AI labs to turn research ideas into production-ready infrastructure ## Why Join Us Your work will directly influence the development of the next generation of AI models, giving you the opportunity to make an outsized impact on frontier research and implementation in enterprise. Our momentum: 0 → 7 figures in revenue in <1 month Backed by: Gradient Ventures, futurepresent, Seedcamp, along with angels from Google DeepMind, Perplexity, Motive, Episode 1 and more Details Employment Type: Full time, in-office Location: London (in-person), with potential for relocation to San Francisco in H1 2026 (with visa support) Compensation: Competitive salary + equity ## Benefits - Relocation package - Housing bonus (if within 3 miles of the office) Please reach out with any questions to founders@isidor.ai ## About Isidor ## Company Overview - **One-liner**: Isidor develops secure, vertically-integrated pipelines that transform raw, unstructured enterprise data into reinforcement-learning-ready curricula for model training, evaluation, and alignment. - **Entity Type**: Private (Pre-Seed; raised $3.6M) - **Headquarters**: San Francisco, California, United States (with a London office) - **Founded**: September 2025 - **Founders**: Andrew M. (CEO & Co-Founder), Antonios Valkanas (Co-Founder & CTO), François V. (Co-Founder) ## Core Business - **Primary Industry**: Artificial Intelligence / Enterprise AI infrastructure - **Target Customers**: B2B – frontier AI labs and large enterprises needing secure, custom model training and evaluation pipelines - **Mission / Purpose**: “Building the foundation of reliable AI” – making AI trustworthy by verifying outputs, benchmarking performance, and automating evaluation at scale. ## Products & Services - **Reasoning Trace Data**: Captures complex workflows and reverse-engineers them from the ground up for model training. - **Foundation Model Post-Training**: Fine-tuning and alignment on proprietary enterprise data and internal practices. - **Verifiers**: Post-processing systems for generative AI outputs, tailored to critical enterprise processes. - **Evaluation**: State-of-the-art benchmarks for specialized industry verticals, paired with best-in-class agentic evaluations. - **Data Pipelines & Infrastructure**: Custom data ingestion, cleaning, and processing pipelines designed for reinforcement learning and evaluation workflows. ## Market Standing - **Valuation / Market Cap**: Not disclosed - **Key Metric**: Total Funding – $3.6M pre-seed (oversubscribed). Revenue – reached 7 figures within the first month of operation, according to job postings. - **Notable Investors / Partners**: - Lead investors: Gradient Ventures (Google’s AI fund), futurepresent, Seedcamp - Angels from Google DeepMind, Perplexity, Motive, Episode 1 - **Growth Signals**: Rapid revenue generation (0 → 7 figures in < 1 month); small team (approx. 4–5 employees as of early 2026) operating in both San Francisco and London; direct collaboration with top AI labs and enterprise clients. ## Competitive Advantages - **Vertically-integrated, secure pipelines** that handle raw, unstructured data end-to-end – from capture to model training and evaluation. - **Focus on reliability and measurement** – treats evaluation as a first-class, reproducible engineering discipline, not an afterthought. - **Enterprise-grade privacy and compliance** built into the core infrastructure, appealing to regulated industries. - **Direct access to frontier labs** and the ability to embed engineers with research teams. ## Strategic Focus - **Current Priorities**: Scaling the engineering team (hiring Founding Engineers and Forward Deployed Engineers); deepening integrations with frontier AI labs; expanding enterprise adoption in sectors requiring high reliability. - **Direction**: Shifting the AI reliability conversation from model size to verifiable behavior – making evaluation “as measurable and reproducible as training itself.” ## Why Work Here - **Culture**: Tight-knit, fast-moving team of engineers and researchers who value precision, transparency, and scientific rigor. Emphasis on ownership and wearing many hats. - **Work Policy**: Full-time, in-office in London (in-person), with potential relocation to San Francisco in H1 2026 (visa support provided). - **Notable Perks**: Relocation package, housing bonus (if within 3 miles of the London office), competitive salary + equity. - **Impact**: Direct influence on the development of next-generation AI models and frontier research; systems built here will be used by top AI labs globally. ## Sources 1. [isidor.ai](https://isidor.ai) 2. [linkedin.com](https://www.linkedin.com/company/isidorai) 3. [greenhouse.io - Founding Engineer](https://job-boards.greenhouse.io/isidor/jobs/4050484009) 4. [greenhouse.io - Forward Deployed Engineer](https://job-boards.greenhouse.io/isidor/jobs/4048584009) 5. [tracxn.com](https://tracxn.com/d/companies/isidor/__q4sE2KpzZy8wPYa4CaLlV-3Kn19uHl7GBvMOIIrYD_U) *(Note: Tracxn lists Isidor as “unfunded,” conflicting with official job postings; we rely on the more recent and primary sources from the company.)* ## Other roles at Isidor - [Intern](https://feeny.ai/job/intern-isidor-london-tzxbygtet32h) — London, United Kingdom - [Open Application](https://feeny.ai/job/open-application-isidor-london-k8wtz4cn98zq) — London, United Kingdom - [Founding Engineer](https://feeny.ai/job/founding-engineer-isidor-london-aew6376z4bsk) — London, United Kingdom - [Forward Deployed Engineer](https://feeny.ai/job/forward-deployed-engineer-wispr-flow-san-francisco-pgja820f57tt) — San Francisco, CA - [Forward Deployed Engineer](https://feeny.ai/job/forward-deployed-engineer-handoff-sao-paulo-xyrh0ahftpxa) — São Paulo, Brazil - [Forward Deployed Engineer](https://feeny.ai/job/forward-deployed-engineer-ascertain-remote-rd1xdrv0j2nx) - [Forward Deployed Engineer](https://feeny.ai/job/forward-deployed-engineer-noble-machines-inc-sunnyvale-kgsb54knbt64) — Sunnyvale, CA - [Forward Deployed Engineer](https://feeny.ai/job/forward-deployed-engineer-netic-san-francisco-1ca2f70nbm0f) — San Francisco, CA - [Forward Deployed Engineer](https://feeny.ai/job/forward-deployed-engineer-dehazelabs-india-cydmtdsxbdw2) — India - [Forward Deployed Engineer](https://feeny.ai/job/forward-deployed-engineer-swarm-aero-remote-0ezqspwz8w7w)