FIOR Group
Senior Software Engineer
Get notified of more jobs like this · No spam, ever
How your CV stacks up
Upload your CV to see how well it fits this job role
?%
About Us
FIOR.Group Limited builds the trust infrastructure for the AI age. Our flagship product, the FIOR AI Gateway, acts as SSL for AI — giving enterprises certificate-based identity, policy enforcement, and quantum-safe cryptography for autonomous AI agents. The platform pairs a high-performance Rust gateway agent with a multi-tenant control plane and role-specific portals, used by regulated organisations across finance, energy, defence, and aerospace.
The Role
We're hiring a senior software developer to build and evolve the FIOR AI Gateway product end-to-end. Working directly with the CTO in a small, senior team, you'll design and ship secure product features across the frontend, backend, core Rust services, and AI inference layer. This is a hands-on software engineering role focused on product development, code quality, and technical problem-solving.
What You'll Do
- Design and integrate AI capabilities using hosted and self-hosted models, including Llama-family models served through vLLM, alongside commercial APIs such as OpenAI and Gemini.
- Build robust backend services and Supabase Edge Functions for AI-assisted investigation, traffic inspection, certificate signing, license binding, and other security workflows.
- Develop well-structured APIs, domain models, and application services that connect the control plane, customer portals, AI services, and the high-performance gateway agent.
- Maintain and extend the
fior-agentRust codebase, including the policy engine, certificate validation, license enforcement, event recording, and integrations with the wider platform. - Build user-facing features across the React/TypeScript frontend and Supabase backend, including Postgres, row-level security, edge functions, realtime subscriptions, and storage.
- Improve software quality through thoughtful architecture, code review, automated testing, performance profiling, secure coding practices, and pragmatic technical documentation.
- Collaborate with product, security, and customer-facing colleagues to turn complex requirements into reliable, maintainable software and support technical demonstrations when needed.
Reasons to use Rodeo
Start with a chat, not a search bar
Grad scheme, placement, apprenticeship? Not sure what you want yet — that's fine. Your agent talks it through with you and turns "I have no idea" into a shortlist.
It searches the market for you
Every day your agent scans the market matching roles against what actually matters to you, not just keywords on a CV.
Only hits
No noise. No "maybe this fits." Just roles with a clear explanation of why they're right — and where to focus when applying.
Required Skills & Experience
- AI/LLM Development: Hands-on experience integrating LLMs into production software, including prompt and context design, structured outputs, tool calling, orchestration, evaluation, and failure handling.
- Local Model Serving: Practical experience with vLLM and Llama-family models, including model selection, OpenAI-compatible serving APIs, inference configuration, performance trade-offs, and production integration.
- Backend Development: Strong experience designing APIs and data-intensive services, with solid SQL, schema design, migrations, row-level security, edge functions (Deno), and Supabase/Postgres.
- Core and Systems Development: Able to read, modify, test, and extend a non-trivial asynchronous Rust service using frameworks such as axum and tokio.
- Frontend Development: 6+ years building production web applications with React and TypeScript, including hooks, context, routing, state management, accessible components, and maintainable UI architecture.
- Software Architecture & Security: Strong understanding of modular design, API contracts, testing, and multi-tenant SaaS. Practical experience with RBAC, OAuth, JWT, X.509, PKI, TLS/mTLS, and modern signing and verification flows.
- Communication: Clear written and verbal communication, sound engineering judgement, and the ability to work independently in a senior, asynchronous, low-overhead product team.
Get help with your application
Your very own career expert that helps elevate your application to the next level.
Bonus Points For:
- Retrieval-augmented generation, embeddings, vector search, and agentic or tool-using AI workflows.
- Prompt-injection defences, LLM security, model evaluation, observability, or inference optimisation.
- Post-quantum cryptography or compliance frameworks such as SOC 2, ISO 27001, NIS2, GDPR, or FIPS 140-3.
What We Offer
- Direct ownership and visible impact on a category-defining product, at the intersection of AI, cryptography, and enterprise security.
- A modern stack, a small team, and no legacy bureaucracy.
- Competitive base salary.
- Fully remote flexibility with periodic in-person meet-ups.
“It took my CV and asked me questions relevant to understanding what kind of jobs to suggest for me. Suggestions were almost perfect. Jobs were exactly what I’ve been looking for.”
Jessica, London
Skills
Location