Cyprian Aarons, Developer in Harare, Harare Province, Zimbabwe
Cyprian is available for hire
Hire Cyprian

Cyprian Aarons

Python Developer

Harare, Harare Province, Zimbabwe

Toptal member since August 13, 2026

Expertise
Web DevelopmentAlgorithmsFull-stackDevOpsArtificial IntelligenceLLMJavaScriptCSSPythonPostgreSQLNode.jsFlaskSQL
Bio

Cyprian is a senior AI engineer and machine learning engineer with 8 years of experience designing and shipping production RAG and multi-agent systems. He architects LangGraph and LangChain pipelines as FastAPI microservices on AWS, combining hands-on delivery, production hardening, evaluation, and technical leadership across insurance, healthcare, government, fintech, and defence.

Portfolio

Self-employed
LangGraph, LangChain, FastAPI, Python, AWS IoT, Tailwind CSS
Freshideas
NodeBox, HTML, JavaScript, Artificial Intelligence (AI), Machine Learning...
Africai
Python, Redis, AWS IoT, FastAPI, HTML, JavaScript, Authentication...

Experience

  • Python - 8 years
  • Git - 8 years
  • Docker - 5 years
  • Redis - 5 years
  • FastAPI - 5 years
  • AWS IoT - 4 years
  • LangGraph - 3 years
  • LangChain - 3 years

Preferred Environment

Python, FastAPI, LangGraph, LangChain, Docker, Git, Redis, PostgreSQL, Full-stack Development, TypeScript

The most amazing...

...thing I’ve developed is a production multi-agent RAG platform serving 20,000+ users at 99.9% uptime.

Work Experience

Senior AI Engineer

2025 - PRESENT
Self-employed
  • Cut policy, claims, and renewal enquiry response times to under 3 seconds and lifted automated engagement 25% by shipping a LangGraph multi-agent RAG pipeline into production.
  • Built production AI systems for insurance, healthcare, government, and fintech teams, adapting LangGraph and FastAPI workflows to client infrastructure and compliance constraints.
  • Shipped multimodal debt-recovery workflows across voice, SMS, and WhatsApp, plus psychometric-profiling and recruitment systems using LangGraph, FastAPI, and AWS.
Technologies: LangGraph, LangChain, FastAPI, Python, AWS IoT, Tailwind CSS

Chief Technology Officer

2020 - PRESENT
Freshideas
  • Led technology development for an eCommerce platform service used by major retail companies in Zimbabwe.
  • Directed a 10-person cross-functional team across eCommerce and SaaS client accounts, maintaining 100% on-time delivery.
  • Cut incidents and release cycles by 40 to 50% through CI/CD and testing improvements while maintaining 100% on-time delivery.
Technologies: NodeBox, HTML, JavaScript, Artificial Intelligence (AI), Machine Learning, Web Development, Content Management Systems (CMS), Payment Gateways, PayPal, Algorithms, Telegram Bots, Website Performance, User Interface (UI), Web Design, Responsive Web Design (RWD), Expo, React Native, iOS, HTML5, Development, Meetings, Project Management, Technical Project Management, CSS, TypeScript, PostgreSQL, APIs, Full-stack, Bootstrap

Chief Technology Officer

2023 - 2025
Africai
  • Scaled a 20,000+ user AI platform to 99.9% uptime as technical owner for a 3-developer team, making architecture, MLOps, and CI/CD decisions.
  • Improved API performance by up to 75% by implementing Redis caching and refactoring to Async Python, while integrating OpenAI and Stability.ai for high-throughput generation.
  • Translated priorities from non-technical investors into concrete build plans under significant ambiguity, guiding hands-on delivery across the platform.
Technologies: Python, Redis, AWS IoT, FastAPI, HTML, JavaScript, Authentication, Automated Testing, DevOps, DevOps Engineer, Flask, Security, Claude, Machine Learning, Large Language Models (LLMs), User Interface (UI), Web Design, Responsive Web Design (RWD), Agentic AI, Development, SQL, Data Engineering, Android, Expo, React Native, iOS, HTML5, Artificial Intelligence (AI), Meetings, Project Management, Technical Project Management, CSS, TypeScript, PostgreSQL, APIs, Full-stack, MySQL, MongoDB

Senior Engineer

2022 - 2024
Freelance Clients
  • Scaled the Coindraw fintech backend to 10,000+ concurrent users at sub-200ms latency through async refactoring and test-driven delivery.
  • Cut CST logistics workflow processing time 80% through async refactoring while delivering concurrently with the Coindraw engagement.
  • Built real-time Vue.js dashboards that synced live telemetry with Go-based hardware backends at sub-100ms latency.
Technologies: Python, FastAPI, Node.js, TypeScript, Vue.js, NPM, Git GUI

Founder / CTO

2018 - 2023
Topiax.xyz
  • Founded and led Topiax.xyz to deliver AI, backend, and full-stack products from discovery through production for clients across insurance, healthcare, fintech, and logistics.
  • Architected reusable Python, FastAPI, and TypeScript systems with secure integrations, automated testing, and production delivery practices that shortened the path from ambiguous idea to maintainable software.
  • Translated complex business requirements into shipped products and public engineering work, combining hands-on implementation with technical direction, client communication, and long-term platform decisions.
Technologies: Python, FastAPI, Node.js, TypeScript, JavaScript

Experience

20,000+ User AI Platform

Production AI platform scaled to more than 20,000 users with 99.9% uptime. As Chief Technology Officer, Cyprian owned architecture, MLOps, and CI/CD decisions for a three-developer team; improved API performance by up to 75% through Redis caching and Async Python refactoring; and integrated OpenAI and Stability.ai for high-throughput generation. He translated investor priorities into concrete build plans under ambiguity.

CST Goods-In

https://cyprian.topiax.xyz/work/cst
CST Goods-In is a real-time mobile operations platform for visitors, deliveries, passes, devices, and staff notifications. As the senior full-stack contractor, I built a mobile-first React Native and Expo app backed by FastAPI and Supabase, with WebSocket updates and HaloPSA, Slack, and SendGrid integrations. The project centralised front-desk workflows, cut logistics processing time by 80%, and improved API response time from 500ms to 200ms.

Semai AI Support

https://semai.xyz
Semai AI Support is a controlled agentic support system that turns approved business information into useful customer answers while preserving clear human handoff for complaints, sensitive cases, and unresolved questions. I designed the AI workflow, API, retrieval, tool boundaries, escalation behavior, and operator surfaces using Python, FastAPI, LangGraph, LangChain, OpenAI-compatible model access, and React. The system includes knowledge maintenance, conversation review, and feedback loops so teams can improve support safely over time.

MedReclaim AI

https://cyprian.topiax.xyz/work/medreclaim
MedReclaim AI is an implementation-ready healthcare debt-recovery platform designed for WhatsApp, Telegram, SMS, voice, and email. As the AI Systems Architect, I designed the LangGraph gateway and FastAPI tool server with tenant and identity checks, PHI filtering, audit logs, payment and document flows, and human handoff. The architecture separates conversation from sensitive actions so regulated teams can automate useful workflows without uncontrolled decisions.

Education

2017 - 2021

Bachelor's Degree in Software Engineering

Harare Institute Of Technology - Harare, Zimbabwe

Skills

Libraries/APIs

Node.js

Tools

NGINX, Expo, Claude, Git, NPM

Languages

JavaScript, HTML, CSS, Python, SQL, HTML5, TypeScript

Frameworks

Flask, React Native, Tailwind CSS, Bootstrap, LangGraph

Paradigms

DevOps, Responsive Web Design (RWD), Automated Testing

Platforms

Android, iOS, Linux, Ubuntu, Docker, AWS IoT

Storage

PostgreSQL, MySQL, MongoDB, Redis

Industry Expertise

Web Design, Project Management

Other

Software Engineering, Artificial Intelligence (AI), Authentication, DevOps Engineer, Web Development, Content Management Systems (CMS), APIs, Algorithms, Telegram Bots, Website Performance, Large Language Models (LLMs), User Interface (UI), Full-stack Development, Agentic AI, Development, Meetings, Technical Project Management, Full-stack, Supabase, Machine Learning, Payment Gateways, PayPal, Data Engineering, FastAPI, LangChain, Git GUI, Security, Search Engines, Vue.js

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

1

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring