Senior Software Engineer – Tech Lead, AI

Job not on LinkedIn

🔥 3 hours ago

🇬🇧 United Kingdom – Remote

💵 $5.5k / month

⏳ Contract/Temporary

🟠 Senior

🤖 AI Engineer

🇬🇧 UK Skilled Worker Visa Sponsor

This company has sponsored UK Skilled Worker visas in the past.

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Threecolts

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2021

🛍️ eCommerce

🏪 Marketplace

☁️ SaaS

💰 Series A on 2023-03

eCommerce • Marketplace • SaaS

Threecolts is an advanced ecommerce software suite designed for retail vendors and marketplace sellers. It provides a comprehensive platform for managing multi-channel retail operations, enabling businesses to streamline product listings, inventory management, customer service, and profit recovery across major online marketplaces like Amazon and Walmart. With various integrated tools, Threecolts helps its users enhance their retail presence, optimize financial operations, and ultimately grow their businesses.

📋 Description

• Design, develop and launch AI features using LLMs for listing optimisation, product descriptions, pricing insights, translation and image enhancement • Build reliable AI workflows focused on output quality, performance, latency and cost • Evaluate and improve AI features using real customer usage and measurable results • Design, build and maintain the MCP server and public API • Develop secure, scalable integrations enabling AI agents to act on behalf of sellers • Ensure APIs are reliable, well-documented and scalable • Work across .NET, C#, SQL Server, MongoDB, REST and GraphQL APIs • Build and maintain integrations with e-commerce platforms and marketplaces • Improve platform performance, reliability and scalability • Own features from design through development, testing and production • Break complex projects into manageable stages and deliver regular improvements • Collaborate with developers, product and the GM on technical solutions • Contribute to code reviews, technical discussions and knowledge sharing • Communicate progress, identify risks and keep delivery on track

🎯 Requirements

• 5+ years of software engineering experience, ideally building and maintaining production SaaS applications • Hands-on experience developing and shipping AI-powered features using LLM APIs such as OpenAI, Anthropic or similar; real production experience required • Strong understanding of LLM integration, including prompt engineering, function calling, structured outputs, evaluation and cost optimisation • Experience building an MCP server or similar AI agent/tool integration architecture • Strong backend engineering skills, with the ability to design scalable, reliable applications and APIs • Experience with third-party APIs, including OAuth, webhooks, rate limiting and data synchronisation • Comfortable taking technical ownership while remaining hands-on with development • Collaborative, pragmatic approach to engineering, with strong communication skills and willingness to share knowledge • Good working English, comfortable collaborating with an international remote team • .NET/C#, SQL Server or MongoDB experience is advantageous, but other backend stacks are accepted • Experience with AI agent frameworks, RAG or AI evaluation tools is nice to have • Experience with e-commerce platforms, marketplace APIs or seller tools is nice to have • Mobile development experience is nice to have • Browser extension experience is nice to have • Experience working in a small, fast-moving SaaS team is nice to have

🏖️ Benefits

• Fully remote working

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