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SENIOR BACKEND DEVELOPER (NODE.js and PYTHON)

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Onsite

SENIOR BACKEND DEVELOPER (NODE.js and PYTHON)

Vennote Technologies Limited

SENIOR BACKEND DEVELOPER (NODE.js and PYTHON)

Skills

SQL QueriesMongoDBDockerNodePythonExpressMachine LearningAIKubernetesNLP / Natural Language ProcessingAzure

17 days ago

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Important information


Contract type:

Freelance / Contract

Location:

Lagos, Nigeria

Work mode:

Onsite

Published on:

2 October 2026

What they need


SENIOR BACKEND DEVELOPER (NODE.js and PYTHON)

Are you an experienced Backend Developer with strong development skills in Node.js and mid to strong experience with Python? Do you have experience in chatbot development or conversational AI? We are seeking a talented Backend Software Developer to join our team and contribute to the development of our next generation chatbot platform. If you have the ability to innovate, multi-task, and work in an agile environment? Then, join our team for Product Development and Project Implementation in Lagos Nigeria.

Vennote Technologies is building a next-generation Natural Language Understanding, Machine Learning and Artificial Intelligence products with a focus on Multimodal and Cross-Channel User Interfaces (phone, web, mobile, etc.)

This is a Hybrid contract position that requires individuals who enjoy challenges, prioritize, meet deadlines, and have a collaborative work ethic and teamwork spirit working with our team of Solution Architects, NLP Engineers, Speech Scientists, FrontEnd Developers, Business and Data Analysts, and Scrum Masters.

We have:

· A state-of-the-art, highly innovative Product platform that we continuously expand/improve to maintain our leadership

· A team of seasoned experts to collaborate with.

· An open mind to new technologies, methodologies, challenges, and innovation.

Responsibilities:

  • Design and implement RESTful APIs endpoints using Express.js framework to facilitate secure and reliable communication between the client and the server.

  • Design, develop, and maintain robust and scalable backend systems for our chatbot platform using Node.js.

  • Integrate with OpenAI services using their SDKs or APIs.

  • Handle the request and response flow to the AI engine, including passing the user's prompt and receiving the AI-generated text.

  • Design and interact with the database to store conversational history, user profiles, application settings, and Retrieval-Augmented Generation (RAG) data sources.

  • Implementing real-time communication using WebSockets to provide a fluid, instant, and conversational chat experience.

  • Collaborate with frontend developers, data scientists, and product managers to build a seamless user experience.

  • Develop and optimize APIs for efficient data exchange between the chatbot and other systems.

  • Implement and integrate natural language processing (NLP) and machine learning models into the backend infrastructure.

  • Ensure the security and reliability of the chatbot backend by implementing appropriate measures.

  • Develop and train machine learning models using appropriate algorithms and techniques.

  • Assess the performance of the chatbot using metrics like accuracy, precision, recall, and F1-score.

  • Fine-tune models to improve their performance and address limitations.

  • Optimize backend performance and scalability to handle increasing user loads.

  • Stay up to date with the latest advancements in backend technologies and chatbot development.

Qualifications:

  • Bachelor’s degree in computer science, Engineering, or a related field.
  • Proven experience in backend software development, with a strong focus on building scalable and high-performance systems.
  • 7 years+ strong proficiency in Node.js and Python backend programming languages.
  • Expertise in database technologies (e.g., MongoDB, SQL, NoSQL) and data modeling.
  • Solid understanding of API development and integration.
  • Experience with Azure cloud platform
  • Knowledge of NLP and machine learning concepts is a plus.
  • Strong problem-solving and analytical skills.
  • Excellent communication and teamwork abilities.

Preferred Qualifications:

  • Experience in chatbot development or conversational AI.
  • Knowledge of messaging platforms (e.g., WhatsApp, Facebook Messenger, Slack).
  • Experience with containerization technologies (e.g., Docker, Kubernetes).

We offer:

Ø An attractive remuneration package

Ø Continuous learning/training in new technologies and products

Ø A great environment to work in, excel and progress professionally

If you want to join a team of global leaders in their field, send your referencing the position title as subject. All applications will be treated with strict confidentiality. Only suitable candidates will be contacted.

Work Location: Hybrid remote in Lagos

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