Senior Backend Python Developer

Join Our Remote Data Products & Machine Learning Startup!

At Muttdata, we build innovative Data Products and Machine Learning solutions that help companies solve complex business challenges. As a fast-growing, remote-first startup, we're passionate about technology, collaboration, and continuous learning.

We're looking for a proactive, technically strong Senior Backend Python Developer to join our team. You'll work on a strategic project for one of our banking clients, designing and maintaining the microservices that power our AI platform — including model gateway, agent orchestration, and retrieval APIs — with a strong focus on clean architecture, scalability, and reliability.

This role requires strong ownership, solid architectural judgment, and the ability to build systems that are secure, performant, and built to scale. You'll collaborate closely with cross-functional teams in a fast-paced, high-standards environment typical of the financial industry.

What We Do

• Leveraging our expertise, we build modern Machine Learning systems for demand planning and budget forecasting.
• Developing scalable data infrastructures, we enhance high-level decision-making, tailored to each client.
• Offering comprehensive Data Engineering and custom AI solutions, we optimize cloud-based systems.
• Using Generative AI, we help e-commerce platforms and retailers create higher-quality ads, faster.
• Building deep learning models, we enhance visual recognition and automation for various industries, improving product categorization, quality control, and information retrieval.
• Developing recommendation models, we personalize user experiences in e-commerce, streaming, and digital platforms, driving engagement and conversions.

Our Partnerships

• Amazon Web Services
• Astronomer
• Databricks

Our Values

• We are Data Nerds
• We are Open Team Players
• We Take Ownership
• We Have a Positive Mindset

Responsibilities

• Design and maintain the platform's core microservices: model gateway, agent orchestration, and retrieval APIs.
• Apply clean/hexagonal architecture principles to ensure maintainable, testable, and scalable systems.
• Implement resilience and scalability patterns: caching, rate limiting, retries, and event-driven/message queue architectures.
• Own the full lifecycle of services: design, implementation, testing, deployment, and monitoring.
• Collaborate with architects, DevOps, and other engineering teams to define technical solutions aligned with business needs.
• Ensure code quality through testing, code reviews, and adherence to engineering best practices.
• Contribute to technical decision-making regarding infrastructure, tooling, and system design.
• Participate in incident response and troubleshooting for production systems.

Required Skills

• 5+ years of backend experience in Python, with microservices running in production.
• Strong experience with FastAPI (or an equivalent async framework).
• Hands-on experience applying hexagonal / clean architecture in real production systems.
• Experience with scalability and resilience patterns: caching, rate limiting, retries, message queues / event-driven architecture.
• Experience with relational databases (PostgreSQL) and NoSQL databases (e.g., DynamoDB).
• Experience with Docker, Kubernetes, CI/CD, and observability tools — ideally on AWS.

Nice to Have

• Experience integrating LLMs (streaming, LiteLLM, LangGraph, RAG).
• Familiarity with Langfuse.
• Experience with Kafka or SQS.
• Knowledge of API security standards (OAuth2/JWT).
• Experience with Terraform.
• Previous experience working in the banking/financial industry.

Perks

• Remote-first culture – work from anywhere!
• In-Company English Lessons.
• Wellhub or sports club stipend to stay active
• AWS, DBT, Google Cloud, Azure & Databricks certifications fully covered
• Food credits via Pedidos Ya – because great work deserves great food.
• Birthday off + an extra vacation week (Mutt Week!)
• Referral bonuses – help us grow the team & get rewarded!
• Annual Mutters' Trip – an unforgettable getaway with the team!
• Monthly Childcare Reimbursement – Because supporting families matters too