Founding Engineer
2 weeks ago
Title: Founding Engineer (Agentic Systems & AI Infrastructure)Location: Remote | Full-Time | Founding TeamAbout the CompanyAn early-stage AI infrastructure startup is building a next-generation operating system for data—combining dynamic ontology engines with advanced agentic systems capable of autonomous, transparent workflow execution. Backed by tier-one investors and already partnering with global enterprises, the company is defining a new category of AI middleware.Role OverviewAs a Founding Staff Engineer, you’ll take end-to-end ownership of core AI infrastructure and help shape the technical foundation from the ground up. This role is highly hands-on, working directly with the founding team to architect agent systems, semantic layers, reasoning engines, and distributed runtime environments.What You’ll Work OnAgent Infrastructure: Orchestration, memory, task planning, and execution logic using Python and open-source LLM frameworks.Ontology & Semantic Systems: Automated layers that unify structured and unstructured data.Agent Runtime: Planning, tool execution, distributed system observability, and robust runtime workflows.Data Infrastructure: Metadata systems, connectors, ETL pipelines, and vectorized storage.Reasoning Engines: Hybrid LLM + symbolic pipelines, task decomposition, and long-term memory.Engineering Culture: Define standards for code quality, system design, and technical velocity while contributing to early hiring.What You Bring5+ years in backend, infrastructure, or AI systems engineering.Strong Python skills plus experience with LLMs, vector DBs, LangChain, or custom agent tooling.Background in agentic systems, reasoning pipelines, or semantic/ontology-based architectures.Familiarity with knowledge graphs, schema reconciliation, or semantic modeling.Experience across modern data infrastructure (e.g., dbt, BigQuery, Airflow) and cloud environments (AWS/GCP).Prior startup or early-stage experience; strong preference for candidates who have built AI or data infrastructure at scale.A builder mindset: fast, hands-on, customer-centric, and comfortable operating in ambiguity.Why JoinWork on frontier AI infrastructure with real enterprise adoption.Founding-level ownership and decision-making influence.Move fast and solve complex technical problems with minimal bureaucracy.Backing from leading US and European investors with a $M
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Founding Engineer
2 days ago
London, United Kingdom Explore Group Full timeFounding Engineer – Early-Stage Deep Tech Startup Full-time | Onsite in London £180,000 + Substantial Equity An early-stage, stealth-mode startup is looking for a Founding Engineer to join the team in central London. This is a unique opportunity to help build a transformative new platform at the intersection of software systems, automation, and...
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Founding Engineer
3 days ago
London, United Kingdom Explore Group Full timeFounding Engineer – Early-Stage Deep Tech StartupFull-time | Onsite in London£180,000 + Substantial EquityAn early-stage, stealth-mode startup is looking for a Founding Engineer to join the team in central London. This is a unique opportunity to help build a transformative new platform at the intersection of software systems, automation, and intelligent...
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Founding Engineer
2 weeks ago
London Area, United Kingdom Oho Group Ltd Full time £60,000 - £120,000 per yearFounding Software Engineer - Cybersecurity Start-Up - LondonFounding Software Engineer for an early-stage cybersecurity start-up redefining how organisations protect data and infrastructure. Join a founding team with a proven record of building successful start-ups, this is a chance to be part of something from the ground up.You'll have3+ years of...
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Founding Engineer
9 hours ago
London, United Kingdom IC Resources Full timeAn exciting opportunity for a Founding Engineer has arisen with a rapidly growing technology company focused on transforming how advanced industries deploy and scale AI systems, based near central London. This is a unique opportunity for a Founding Engineer to work directly with the founding team on the highest priority challenges across the company. You...
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Founding Engineer
2 days ago
London, United Kingdom Albert Bow Full timeFounding Engineer | Fintech | London (Onsite) | £100k and Founding Equity We're working with an early-stage, VC-backed startup in London that is building an AI platform to automate finance operations . They’re looking for a Founding Engineer to join the team and help shape the product, technology, and company from day one. What The Role Involves Own...
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Founding Engineer
9 hours ago
London, United Kingdom Amicus Full timeFounding ML Engineer / Founding Head of Engineering - London- £120,000 Seniority: First senior technical hire Focus: Reasoning engine design, data strategy, early engineering team building Role Overview You will serve as the company’s founding technical leader, architecting a reasoning and simulation engine that models how buildings are constructed. The...
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Founding Engineer
2 weeks ago
London Area, United Kingdom Oho Group Ltd Full time £100,000 - £120,000 per yearFounding Engineer - Your Ticket to YC W26Founding Engineerrequired to be thefirst engineering memberof an exciting pre-seed start-up on its journey toY Combinator W26. The team is very early, already accepted into YC, and backed by alarge pre-seed round from top-tier investors.This is an extremely rare opportunity to go through Y Combinator and experience...
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Founding Engineer
4 weeks ago
London, United Kingdom UK Visa Lab Full timeFounding Engineer — UK Visa LabAbout UK Visa LabUK Visa Lab was born from personal experience. Our co-founders, both immigrants who’ve navigated the UK immigration system firsthand, saw how outdated, confusing, and emotionally draining the process could be.We’re now on a mission to build the UK’s first AI-native immigration platform — one that...
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Founding Engineer
2 weeks ago
London, United Kingdom UK Visa Lab Full timeFounding Engineer — UK Visa LabAbout UK Visa LabUK Visa Lab was born from personal experience. Our co-founders, both immigrants who’ve navigated the UK immigration system firsthand, saw how outdated, confusing, and emotionally draining the process could be.We’re now on a mission to build the UK’s first AI-native immigration platform — one that...
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Founding Engineer
3 days ago
London, United Kingdom Albert Bow Full timeFounding Engineer | Fintech | London (Onsite) | £100k and Founding EquityWe're working with an early-stage, VC-backed startup in London that is building an AI platform to automate finance operations. They’re looking for a Founding Engineer to join the team and help shape the product, technology, and company from day one.What The Role InvolvesOwn critical...
