Senior Python Engineer
Summary
3–6 month contract Senior Python Engineer building scalable backend microservices, voice chat, and data pipelines for a language-assessment product using AI. Core stack is Python, FastAPI, PostgreSQL, AWS/Lambda, Docker, and OpenTelemetry, with AI/ML (ASR/TTS/LLM) work highly valued. Hybrid: 2 days onsite in London, £450/day outside IR35.
Salary: £? - ? per year
Requirements:- Strong commercial Python development experience, including object-oriented and functional programming.
- Strong experience with FastAPI, Pydantic, SQLAlchemy, Alembic, Pytest, and type checking.
- Experience with Pandas, NumPy, Jupyter, OpenTelemetry, Git/GitHub, GitHub Actions, and Docker.
- Experience developing microservices and/or Lambda-based solutions.
- Strong experience with PostgreSQL.
- Experience working with AI/ML technologies, particularly ASR, TTS, LLMs, or related tooling, is highly desirable.
- AWS, Terraform, Kubernetes, Hugging Face, PyTorch/TensorFlow, or Generative AI tooling would be advantageous.
- Strong communication, stakeholder management, analytical, and problem-solving skills.
- Comfortable taking ownership and working in a fast-paced, constantly evolving environment.
- Develop and maintain scalable Python services, microservices, voice chat, and data pipelines.
- Work with the Tech Lead and wider team on architecture, technical decisions, and solution design.
- Collaborate with product, data science, QA, design, and subject matter experts to deliver new features.
- Ensure applications meet high standards for performance, scalability, reliability, and quality.
- Contribute to code reviews, technical discussions, requirements, and user stories.
- Take ownership of technical issues and support an end-to-end DevOps approach.
- Mentor less experienced developers and share technical knowledge.
- Stay current with developments in AI, cloud engineering, and language assessment.
- AI
- AWS
- Lambda
- Cloud
- DevOps
- Docker
- FastAPI
- Git
- GitHub
- Support
- Jupyter
- Kubernetes
- LESS
- MS Teams
- OpenTelemetry
- PostgreSQL
- PyTorch
- Python
- TensorFlow
- Terraform
- microservices
- numpy
- pandas
- pytest
More:
We are a trusted technology partner developing innovative products and looking for an experienced Senior Python Engineer / Back End Developer to join a fast-moving team. This is a 3-to-6-month contract with a rate of £450 PD outside IR35, offering 2 days onsite in London in a hybrid setup with an ASAP start. You will work on a cutting-edge product using modern microservices, cloud, and AI technologies within a fast-paced, collaborative team. The interview process is one stage via MS Teams.
last updated 38 week of 2026
Skills
- AI
- AWS
- Cloud
- Data Pipelines
- Data Science
- DevOps
- Docker
- FastAPI
- Generative AI
- Git
- GitHub
- GitHub Actions
- Hugging Face
- Jupyter
- Kubernetes
- Lambda
- LLM
- Machine Learning
- Microservices
- NumPy
- OpenTelemetry
- pandas
- PostgreSQL
- pytest
- Python
- PyTorch
- Solution Design
- Stakeholder Management
- TensorFlow
- Terraform
- User Stories