Overview

We’re looking for a Senior Full-Stack Developer with a specialised focus on Python engineering and complex system integrations to join a fast-growing PropTech startup. Our client is a production-grade SaaS platform revolutionising how construction professionals manage pricing and tenders.

By leveraging advanced computational logic and AI, the platform transforms a 5-day manual process into minutes. This is a foundational engineering role where you will own the backend architecture, lead AI model integrations, and directly influence the scaling of a product used nationwide.

NB! Applicants must reside in and be citizens of South Africa.

Tasks include:

• Senior Python Engineering: Lead the development of the core pricing engine and RESTful APIs using Python (Flask).

• AI & API Integration: Architect and manage deep integrations with Large Language Models (LLMs) and advanced AI APIs to power a complex 5-rule computational pricing hierarchy.

• Data Processing Pipelines: Build and optimise high-stakes document processing capabilities (PDF, Excel, Word) for massive data ingestion.

• Database Management: Utilise SQLAlchemy to design schemas and optimise complex queries for a database of thousands of verified market rates.

• Frontend Development: Maintain and extend high-performance, responsive user interfaces using React.

• Independent Ownership: Take full end-to-end responsibility for the product roadmap, from database design to infrastructure deployment.

Technical Requirements: 

The "Must-Haves"

• Expert Python Proficiency: Extensive professional experience with Python 3.10+.

• Integration Master: Proven track record of successfully integrating complex third-party and AI-driven APIs.

• Data Expertise: Proficiency with data processing tools such as Pandas and NumPy.

• Relational Databases: Expert knowledge of PostgreSQL and SQLAlchemy.

The Full Stack

• React: Strong experience with hooks, state management, and modern JavaScript.

• DevOps: Comfort with Docker, Linux, and CI/CD pipelines for automated deployments.

Experience Level

• 5+ Years of professional experience in a production-grade SaaS or scaling startup environment.

Competencies:

• High Accountability: You take pride in code quality and own your work from design to production.

• Architectural Mindset: You contribute to long-term technical direction and system design.

• Agile Adaptability: You thrive in a fast-paced environment with low red tape and high deliverable expectations.

What’s in it for you:

• Competitive Package: Market-related salary.

• Remote-First Culture: Fully remote/hybrid flexibility within South Africa.

• AI Innovation: Direct exposure to building agentic AI solutions and modern LLM-driven workflows.

• Impact: Real opportunity to lead the technical evolution of a product that directly solves real-world industry pain points.