Python Engineer

Every day, somewhere in the world, important decisions are made. Whether it is a private equity company deciding to invest millions into a business or a large corporation implementing a new strategic direction, these decisions impact employees, customers, and other stakeholders.

Consulting and private equity firms come to proSapient when they need to discover knowledge to help them make great decisions and succeed in their goals. It is our mission to support them in their discovery of knowledge.

We help our clients find industry experts who can provide their knowledge via interview or survey: we curate this knowledge in a market-leading software platform; and we help clients surface knowledge they already have through expansive knowledge management.

We are seeking an experienced Python Software Engineer to join our engineering team and help build robust, secure, and scalable backend systems that power our research platform. This is a hands-on role where you’ll work closely with Product and Data teams to develop features, integrate large language models (LLMs), and shape the architectural direction of our core services.

You’ll be part of a collaborative, cross-functional team, contributing to projects with real-world impact and helping us deliver knowledge discovery tools to the world’s top consulting and investment firms.

Key duties in this role will include:

• Design, develop, test, and maintain scalable backend services using Python (Django/FastAPI).
• Integrate third-party APIs and services, including LLMs for data extraction and automation.
• Work with PostgreSQL to model and optimize relational data at scale.
• Collaborate with product managers, designers, and other engineers to ship impactful features.
• Ensure code quality through testing, reviews, and adherence to best practices.
• Participate in architectural decisions and system design reviews.
• Support and maintain production systems, contributing to observability and performance tuning.

Requirements

Key Skills needed for this role include:

• 3+ years of experience as a backend software engineer, primarily using Python.
• Proficiency with Python web frameworks such as FastAPI or Django.
• Solid experience with PostgreSQL, including schema design and performance optimization.
• Familiarity with REST APIs, background job processing.
• Strong problem-solving skills and ability to work independently in a fast-paced environment.

• Experience with message brokers (e.g., Kafka, RabbitMQ).
• Familiarity with Elasticsearch.
• Knowledge of cloud infrastructure (preferably AWS), Docker/Kubernetes, and CI/CD pipelines.
• Exposure to observability tools (e.g., Datadog, Prometheus, Grafana).

• Tenure gifts to thank our loyal staff who help the business to grow
• An enhanced Maternity & Paternity package
• 22 days annual leave each year + Statutory public holidays, inclusive of a week's closure over the Christmas period to fully reset
• A paid sick leave policy (up to 10 days per year)
• A hybrid working model featuring three days per week in the Lisbon office and 2 from home
• Meal allowance of 9.6€ per working day.
• Team socials – from Pizza to Caribbean to Korean food, we love to encourage our team to get together and try new experiences together!
• The opportunity to create, lead or participate in one of our many ERG groups, to help drive diversity, inclusion and understanding across our business
• Corporate Events: from bi-annual Christmas & Summer parties, we love to celebrate, collaborate and have fun together!

We are committed to building an inclusive workplace - did you know that marginalized groups are less likely to apply to jobs unless they meet every requirement listed? If you are interested in the above role, but don't necessarily tick every box, we encourage you to apply anyway - this role could still be a great match!

At proSapient, we are an equal opportunity employer. As such, we offer equal employment opportunities without regard to race, colour, religion, sex (including pregnancy and gender identity), national origin, age, disability, genetic information, veteran status and other protected class characteristics.

All employment is decided based on qualifications, merit, and business need. Due to the regulated nature of our clients, all successfully offered candidates are subjected to thorough screening & pre-employment checks, including an enhanced background check, which can affect the outcome of any offer of employment.