Senior ML Engineer (Portugal Based Remote/Hybrid)

Sword Health is on a mission to free two billion people from pain.

With 67% of members achieving a pain-free life and a 70% reduction in surgery intent, at Sword, we are using AI Care to change lives, and save millions for our 25,000+ enterprise clients across three continents. Today, we hold the majority of industry patents, win 70% of competitive evaluations, and have raised more than $300 million from top venture firms like Founders Fund, Sapphire Ventures, General Catalyst, and Khosla Ventures.

Recognized as a Forbes Best Startup Employer in 2025, this award highlights our focus on being a destination for the best and brightest talent. Not only have we experienced unprecedented growth since our market debut in 2020, but we’ve also created a remarkable mission and value-driven environment that is loved by our growing team. With a recent valuation of $4 billion, we are in a phase of hyper growth and expansion, and we’re looking for individuals with passion, commitment, and energy to help us scale our global impact.

Joining Sword means committing to a set of core values, chief amongst them to “do it for the patients” every day, and to always “deliver more than expected” on behalf of our members and clients.

This is an opportunity for you to make a significant difference on a massive scale as you work alongside 1000+ (and growing!) talented colleagues, spanning three continents. Your charge? To help us build a pain-free world, powered by AI, enhanced by people — accessible to all.

What you'll be doing:

• Contribute to designing, building, evaluating, shipping, and improving Sword’s products by hands-on AI/ML development;
• Develop and maintain data processing pipelines for getting the data required to build and evaluate models;
• Work alongside the Product, Data & Engineering Teams to define and implement AI/ML-powered features for internal and external users;
• Share your knowledge and experience of how to build ML systems;
• Help grow the AI/ML function by defining and promoting best practices;
• Identify and spearhead initiatives for adding AI/ML capabilities to Sword’s products by navigating uncertainty and time-to-value tradeoffs.

What you need to have:

• 4+ years of professional experience in Machine Learning;
• Hands-on experience implementing and maintaining production machine learning systems;
• Solid experience in SQL and Python as well as experience developing production software;
• Working knowledge of Python data stack (numpy, pandas, matplotlib, scikit-learn, etc);
• Experience leading and owning complex and ambiguous projects from ideation to completion/maintenance;
• Experience providing technical oversight and mentoring colleagues;
• Ability to learn quickly and dive deep into new problems and fields;
• Ability to communicate concepts clearly and interface with both technical and non-technical stakeholders;
• Ability to prioritize and solve issues according to the team’s direction and goals.

What we would love to see:

• Experience working in a fast-paced environment and wearing different hats;
• Experience building data processing pipelines;
• Experience shipping applications using LLMs and Generative AI;
• Experience using cloud platforms like GCP or AWS.

To ensure you feel good solving a big Human problem, we offer:

• A stimulating, fast-paced environment with lots of room for creativity;
• A bright future at a promising high-tech startup company;
• Career development and growth, with a competitive salary;
• The opportunity to work with a talented team and to add real value to an innovative solution with the potential to change the future of healthcare;
• A stimulating environment with room for creativity;
• A flexible environment where you can control your hours (remotely) with unlimited vacation;
• Access to our health and well-being program (digital therapist sessions);
• Remote or Hybrid work policy.

*This range includes base, variable and equity

These compensation bands are just the starting point. Once someone joins and proves they’re outlier talent, we adjust quickly to ensure their compensation aligns with their impact.

Our job titles may span more than one career level. Actual pay is determined by skills, qualifications, experience, location, market demand, and other factors. Compensation details listed in this posting reflect the base salary and any potential variable, bonus or sales incentives, and the Company’s estimation of the value of private company stock options, if applicable. The pay range is subject to change, future value of company stock options is not guaranteed, and compensation may be modified in the future. In addition to our total compensation, Sword offers a number of benefits as listed below.

Portugal - Sword Benefits & Perks:

• Health, dental and vision insurance

• Meal allowance

• Equity shares

• Remote work allowance

• Flexible working hours

• Work from home

• Discretionary vacation

• Snacks and beverages

• English class

Note: Please note that this position does not offer relocation assistance. Candidates must possess a valid EU visa and be based in Portugal.