Senior Full Stack Engineer

April 29, 2025

We are Trusted

🚀 We're on a mission to help global organisations win more profitable business faster, through intelligently capturing and converting the trusted voice of the customer. Trusted is set to redefine Customer Advocacy Marketing with a cloud-native, real-time, and AI-powered platform.

We're building the next-generation B2B demand engine, enabling brands to connect their prospects directly with their happiest customers—creating trust at scale.

Reporting to the Principal Engineer, we seek a Senior Full-Stack JavaScript Engineer to help develop our React, TypeScript, and Node.js-powered platform. You'll be key in building scalable, high-performance applications while collaborating closely with engineering leadership and product strategists.

If you thrive on hands-on development, solving complex technical challenges, and working with cutting-edge web technologies, we'd love to hear from you!

What you'll do

• Develop & Maintain Full-Stack Applications: Build and optimise scalable, high-performance applications using React, TypeScript, and Node.js. Ensure seamless interactions between the frontend and backend, delivering a highly responsive and intuitive user experience.
• Enhance API & Backend Services for AI Agents: Design, implement, and maintain secure, high-performance APIs that integrate with AI agent systems and LLMs (OpenAI, Anthropic Claude, or similar). Develop robust API endpoints to facilitate real-time AI interactions and automation workflows.
• Work with AI & LLM Tools: Implement retrieval-augmented generation (RAG) pipelines, fine-tune LLM prompts, and integrate AI-driven decision-making into the product. Experiment with vector databases (Weaviate, Pinecone, FAISS) to enhance model retrieval capabilities.
• Build and optimise UI Components: Work with Storybook and component-driven development to create a reusable, scalable design system that ensures consistency, accessibility, and responsiveness across the platform. Collaborate with the Product Lead to refine UI/UX based on real-time user feedback and behavioural analytics.
• Implement Behavioural Analytics & Tracking: Leverage Mixpanel and event-based analytics to track user interactions, identify trends, and inform product decisions. Establish key performance indicators (KPIs) and ensure data-driven optimisations that improve engagement, retention, and conversion rates.
• Ensure Security, Testing & Performance Optimization: Implement SOC 2-compliant security best practices, including data encryption, role-based access control (RBAC), and secure API authentication. To ensure reliability, develop comprehensive test coverage, including unit, integration, and end-to-end tests. Continuously optimise front and backend performance to handle increasing traffic and scale efficiently.
• Improve Deployment Pipelines & Observability: Work with DevOps to enhance CI/CD automation, infrastructure-as-code (IaC), and cloud deployments, ensuring a secure, scalable, and SOC 2-compliant environment. Implement logging, monitoring, and alerting solutions to proactively detect issues, minimise downtime, and maintain high availability.
• Collaborate with Engineering & Product Teams: Work closely with the Principal Engineer, and Product Lead to align frontend and backend architecture with product goals, scalability needs, and compliance requirements.

What we're looking for

• 5+ years of experience in full-stack development: with expertise in React, TypeScript, and Node.js.
• Experience building AI-driven applications: including LLM-powered workflows, AI agents, and RAG (retrieval-augmented generation).
• Strong API design experience: including building and maintaining secure, efficient RESTful and GraphQL APIs that integrate with LLMs, vector databases, and AI decision-making engines.
• Hands-on experience with AI APIs: (OpenAI, Anthropic Claude, or similar) – Ability to design and fine-tune AI-driven interactions within the product.
• Experience with cloud platforms: (AWS, GCP, or Azure), including containerization (Docker/Kubernetes), serverless architectures, and cloud-native deployments optimized for AI workloads.
• Understanding of SOC 2 compliance requirements: and experience implementing secure LLM workflows, data encryption, role-based access control (RBAC), and API authentication strategies.
• Proficiency with DevOps and CI/CD pipelines: ensuring automated deployments, monitoring, and AI model observability.
• Strong testing background: with experience writing unit, integration, and end-to-end tests to validate AI interactions, data pipelines, and real-time API calls.
• Experience with vector databases: (Weaviate, Pinecone, FAISS) and AI-enhanced search or recommendation systems.
• Strong problem-solving and debugging skills: with a focus on AI scalability, performance optimisation, and trustworthiness.
• Excellent collaboration skills: working closely with the Principal Engineer, AI researchers, and Product teams to align technical execution with AI-driven innovation.
• Comfort in a fast-paced startup environment: with a willingness to experiment, iterate quickly, and drive AI-powered product innovation.

Why join us?

• Be an early part of a high-growth AI-driven SaaS startup backed by £1M in pre-seed funding from top investors.
• Work on cutting-edge AI-powered technologies, integrating LLMs, AI agents, and scalable full-stack applications.
• Solve complex challenges in AI, scalability, and security, including retrieval-augmented generation (RAG), vector databases, and SOC 2 compliance.
• Work in a high-trust, remote-first environment with flexible hours.
• Competitive salary plus equity options in a high-impact role.
• 25 days of holiday per year, in addition to bank holidays.
• Home office budget.
• Personal development budget.

Interested?

Ready to build something revolutionary? If you're excited about working on LLMs, AI agent systems, vector databases, cloud infrastructure, and scalable architectures, let's talk.

To apply, simply email jobs@thetrusted.io and help us redefine Customer Advocacy Marketing.