Full Stack AI Software Engineer (Junior / Mid Level)

Voxly Digital; Greater London; Hybrid; GBP 40,000 - 48,000; Full time

Benefits offered by this job

Annual TFL Travel Card

22.5 Days Paid Vacation

Free ChatGPT+ & Github Copilot

Free Lunch

Nest Pension

Paddington Co-Working Space

Job summary

Voxly Digital builds full stack enterprise AI software for large multinational clients, with a Paddington, London base. We are hiring to scale our core AI applications and support expanding customer projects.

You will join as a Junior/Mid Full Stack AI Engineer, spending majority time on web development, API integration, and cloud hosting, with opportunities to work directly with customers and leverage Langchain-powered LLMs.

Qualifications

• 2+ years of related professional software engineering work experience.
• Understanding of client-server interactions and REST API development and deployment.
• Strong knowledge of backend technologies, including Node.js, NoSQL/SQL databases, or BaaS.
• Some experience of hosting applications with AWS or similar Cloud provider/s.
• Fluency in English including very strong writing skills (prompting is super important).

Responsibilities

• Spend 50%-60% of your time on full-stack web development.
• Develop RESTful APIs and server-side logic with Node.js.
• Integrate LLM APIs and manage databases, including vector databases.
• Spend 10%-20% on DevOps, deploying and managing applications on AWS.
• Spend 10%-20% talking to customers to understand their challenges, present solutions, and gather feedback.

Skills

REST API development

Node.js

NoSQL/SQL databases

AWS hosting

English writing

Tools

Langchain

Llama Index

Vercel AI SDK

Next.js

SST

AWS

Job description

• Long-Term Stability. Startup Vibe. Rapid Career Growth.
• 4-5 days a week in the office (Paddington, London).
• Salary Range: £40,000 - £50,000 + loads of benefits.

Voxly Digital builds full stack enterprise AI software for large multi-national clients. We have annual retainers for bespoke AI and LLM-based projects with large players like Diageo, the UK Royal Navy, and Bristol Airport. We are based in Paddington, London, UK.

We mainly work in two product areas:

• AI for Conversational Marketing & Customer Self Service.

We are 100% bootstrapped, profitable, and have been in business for 6+ years. We're getting new customers all the time and our current roadmap is extensive.

Our mission is to drive enterprise transformation through AI and we are hiring because we need more core developers to support our expanding customer base.

What You’ll Do

As a Junior/Mid Full Stack AI Engineer, you will:

• Spend 50%-60% of your time on full-stack web development.
• Develop RESTful APIs and server-side logic with Node.js.
• Integrate LLM APIs and manage databases, including vector databases.
• Spend 10% - 20% on DevOps, deploying and managing applications on AWS.
• Spend 10% - 20% talking to customers to understand their challenges, present solutions, and gather feedback.

Our Stack

We make our apps with Next.js 14 App Router, deployed on AWS via SST. For LLM solutions, we use the suite of products offered by Langchain.

• Frontend: TypeScript, Next.js, React, HTML, Tailwind CSS, shadcn/ui
• Authentication: Next Auth, Clerk, or we roll our own.
• Cloud: AWS + Azure. CloudFront, Lambda, S3, Eventbridge, Cloudwatch, SES and many more services which are mostly provisioned via SST.
• Analytics: Google Analytics 4.
• Version Control: Git, Bitbucket.

Who You Are

• You believe shipping = success, and is the most important KPI.
• You believe working should always feel like a great deal for both you and the company.
• You understand to get a great deal you need to create a lot of value for the company - you'll come on board to work hard, and in exchange have the opportunity to build and ship Enterprise Grade AI applications.
• You enjoy diving into new challenges, building innovative projects from the ground up.
• You relish solving hard problems - often through trial and error. If you shine, we'll give you loads of end to end responsibility.
• You are not a fan of Leetcode-style puzzles.
• You enjoy using AI tools like ChatGPT, GitHub Copilot, Cursor, and Claude.
• You're willing to dive into the new world prompting - meaning you're ok for alot of trial and error before mastering this area.
• You enjoy talking to customers. You are patient and non-condescending – a clear and simple communicator.

To be considered for this role you must have:

• 2+ years of related professional software engineering work experience.
• Understanding of client-server interactions and REST API development and deployment.
• Strong knowledge of backend technologies, including Node.js, NoSQL/SQL databases, or BaaS.
• Some experience of hosting applications with AWS or similar Cloud provider/s.
• Fluency in English including very strong writing skills (come on ... prompting is super important right?).

Preferences

You'll have an edge over other applicants if you:

• Understand high-level AI concepts like vector databases, embeddings, RAG, etc. (Note: you do not need to be an ML expert).
• Have used new LLM frameworks like Langchain, Llama Index, Vercel AI SDK etc.
• Have a live side-project / personal site or other evidence demonstrating your ability to write code independently.
• Have been using Next.js/React in production for over 1 year.
• Have experience with analytics tools such as Posthog, Mixpanel, Amplitude, or Google Analytics.
• Have worked on enterprise software in production for over 1 year.
• Have experience of hosting and supporting production applications on AWS.
• Have AWS Cloud Certifications or experience deploying a Next.js site to AWS via SST.

Work Location & Hours

Our team is office-based in Paddington from 9:30 - 6 PM, 5 days a week. We allow the occasional work-from-home day once you’ve established yourself – but the job is office based.

We believe this drives teamwork, efficiency, and rapid-learning. If you love collaborating and engaging with colleagues in person, you'll fit right in!

• Base Salary: £40,000 - £48,000 annually.
• Performance Reviews: Every 6 months for your first year, annually thereafter.
• Performance Bonuses: 10% of base salary annually (depending on personal and performance of course).
• Annual TFL Travel Card (Zone 1 and 2) worth £2000.
• 22.5 Days Paid Vacation
• Free ChatGPT+ & Github Copilot Subscription
• Free Lunch: Once a week (ish) at a nearby restaurant!
• Nest Pension: With a 3% employer match.
• Paddington Based Co-Working space away from the traffic and the noise. Close the canal's behind the station.

Interview Process

• 1x Video Call.
• 1x Take Home task (should take 1 evening)
• 1x In-Person Review - you’ll come into the office – show us what you’ve done – and we’ll ask you some questions about the task and your life!

Talk to our team about advertising, commerce and customer support use cases for your brand.