Job Description

About the company

First Line Software works with some of the worlds top businesses and organisations in industries like healthcare, real estate, data engineering, warehouse automation, retail digitalisation, mobile app development, and e-commerce. Our projects are as varied as our people, and our people are as talented as they come.

We prefer working as a transparent and supportive team, who shares our knowledge as well as our success.

Lets see what we can create together!

The Role and Our Project

We are seeking a skilled Senior AI Fullstack Engineer who is passionate about building scalable and well-designed systems using Python, GenAI, and AWS Lambda You will work in a modern, modular environment where we prioritize writing clean, testable code that is easy for teams to maintain over the long term.

In this role, you will be responsible for creating microservices that follow clear design principles, making sure every piece of code has one specific and defined purpose. You will build systems that coordinate these services efficiently and use a "test-first" approach to ensure everything we deploy is reliable and predictable. This is an exciting opportunity to scale AI ideas from a simple concept into a full production application used by real customers.

Key Responsibilities

As a Senior AI Fullstack Engineer, you will:

• Design and develop microservices where each service and class has one clear, defined job to do.
• Build orchestrators that coordinate different services cleanly while keeping the system flexible and easy to update.
• Use Test-Driven Development (TDD) to write thorough unit tests and mock external parts of the system for reliable deployments.
• Set up and maintain strong logging and monitoring tools to track how our services are performing across different environments.
• Work within a modular and well-documented architectural framework to ensure the codebase stays organized.
• Collaborate closely with frontend engineers, data scientists, and DevOps teams to deliver features that meet user needs.
• Take AI ideas from the early stages and turn them into full production applications from scratch.

What You Bring

Your strong software engineering fundamentals and experience building production-ready AI features are essential for this role.

Essential Qualifications (Must-Haves):

• More than 5 years of professional experience in full-stack software development.
• Expert-level knowledge of Python, which is a core requirement for this position.
• Hands-on experience with modern full-stack technologies like React, NodeJS, TypeScript, and both SQL and NoSQL databases.
• Deep understanding of software engineering fundamentals, including OOPS concepts, lazy loading, and asynchronous programming.
• Proven experience building production-level AI applications using RAG, Vector Storage, and LLM FineTuning.
• Working knowledge of multi-agent frameworks, such as LangGraph, and other modern AI orchestration tools.
• Experience taking AI features through the entire lifecycle, including QA, deployment, and security checks.

Desired Skills & Knowledge (Nice-to-Haves):

• Prior exposure to broader Machine Learning (ML) services and advanced deep learning frameworks.
• Experience working in a service-oriented environment with a strong focus on minimal coupling between services.
• Interest in staying ahead of the curve with the latest GenAI and LLM research.

What we can offer

The FLS difference

• Our modern stack projects are the right mix of exciting and challenging
• Gain access to our diverse range of training programs, courses, and certifications;
• Choose your work style - remote, on-site or hybrid in one of our stunning offices. We offer the freedom of flexible working hours
• Enhance your language skills with our corporate English classes
• Work from anywhere and explore the world with our Workation program