Senior Machine Learning Applied Scientist

3 weeks ago


Boston, United States OfferFit Full time
Job DescriptionJob Description

OfferFit was founded by ex-McKinsey and BCG math PhDs, and we're funded by leading Silicon Valley VCs. OfferFit replaces A/B testing with AI testing, powered by reinforcement learning AI. This allows lifecycle marketers to test & improve the performance of their campaigns much faster than before. Customers include leading brands like Brinks Home, Yelp, Chime, Engie, and MetLife, among many others.

Note for Applicants:

Data shows that men on average apply for a role if they meet 6/10 requirements while women often only do so if it's 10/10. We work hard to be clear and specific about what our roles require, and we encourage you to apply even if you don't check all the boxes Applying gives you the opportunity to be considered and we look forward to reviewing your application

Our team is growing We're looking for an RL researcher or practitioner who will apply reinforced learning to solve real-world customer communication challenges. In this role, you'll work closely with the CTO and Engineering team to improve sample efficiency, test credit assignment and attribution algorithms, investigate and improve our approach to action space featurization, reward shaping, combining RL with constrained optimization, and other interesting challenges. Currently, we use ensembles of contextual bandits to achieve high sample efficiency and coordination of decisions, and we're constantly testing and implementing improvements.

Your responsibilities will include:

  • Improve RL algorithms to increase performance, sample efficiency, and robustness at scale
  • Develop and apply advanced diagnostic tools, including off-policy evaluation methods
  • Conduct research on state-of-the-art RL techniques and their applicability to marketing optimization
  • Implement better monitoring and observability tooling
  • Work closely with engineering teams to improve OfferFit's platform and develop APIs for OfferFit ML components
  • Participate in customer implementations to gain insights into real-world use cases
  • Contribute to OfferFit's product strategy and roadmap

Tech stack:

  • Data Science/Back End: Python ML ecosystem, Spark, BigQuery, FastAPI
  • Architecture/DevOps: Kubernetes, Airflow, Terraform, GCP
  • Web [not required for this role] : TypeScript, JavaScript, Vue.js and its ecosystem, Node.js, Strapi, PostgreSQL, HTML5, CSS3
  • We write well-tested, type-hinted, documented, modular code and use pre-commit hooks, CI/CD, and issue tracking for development

Why is it great:

No toy datasets in notebooks — we're implementing AI pipelines in production at scale generating real value.

  1. Opportunity to bridge cutting-edge RL research with real-world applications.
  2. Access to large-scale datasets and computational resources.
  3. Support for continued research, including conference attendance and publication.
  4. Collaboration with a diverse team of experts in ML, engineering, and marketing.
  5. Join OfferFit's fast-paced, supportive, and professional team. We make sure all of our team members are empowered and receive great mentorship and coaching.

Who's a Fit:

  • Exceptional coder: you have experience on writing clean, well-designed, versioned code; you care about good coding practices and terse, testable APIs.
  • Problem solver: you thrive on tackling complex, real-world challenges with novel ML approaches
  • Impact-driven: you're motivated by seeing your research translate into tangible business outcomes
  • Collaborative: You enjoy working closely with a team of driven individuals across multiple teams to get things done. You're willing to both help and ask for help.
  • Structured and organized: you can structure a plan, align stakeholders, and see it through to execution.
  • Clear communicator: you are able to express yourself clearly and persuasively, both in writing and speech.
  • Ph.D. in Computer Science, Machine Learning, or a related field with a focus on Reinforcement Learning. MS with professional experience with RL is fine too.

Additional Requirements:

  • Candidates must be able to partially overlap and support North America time zones
  • Must be fluent in English, both written and verbal
  • Up to 10-15% travel for company-wide quarterly gatherings, team offsite workshops, customer meetings, and industry-related events

The base salary range for this position in the United States is $193,000-$241,000 per year, plus eligibility for additional bonus ranging $27,000-$33,000; Eligibility for an additional end of year performance bonus, commissions (when applicable) and/or equity options may be provided as part of the compensation package, in addition to a full range of medical, financial, and/or other benefits, depending on the position offered. Please note that we adjust compensation for non–US countries using a relative cost of labor adjustment between the US and your country of residence. Applicants should apply via OfferFit's internal or external careers site.

OfferFit Benefits and Perks:

  • Generous PTO (starting at 25 days PTO per year) and Parental Leave policy (12 weeks paid)
  • 100% remote work environment with flexible hours
  • Quarterly gatherings where we meet in person in a different city to work together, bond as a team and celebrate our progress
  • Weekly team events (lunch and learns, trivia, virtual escape rooms, town hall and team health "barometer" meetings)
  • Ability to learn and develop from an experienced leadership team (ex-Amazon, McKinsey, BCG, and IBM, among others) who are focused on building a talented, diverse, and inclusive team
  • Dedication to building a strong culture (e.g., team resource groups, weekly recognitions, major life event celebrations, mental health/sustainability days off, etc.)
  • [US Only] Competitive benefits (major medical, vision, dental and LTD) and 401K matching program

OfferFit is committed to a diverse and inclusive workplace. OfferFit is an equal opportunity employer and does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status.



  • Boston, United States Beth Israel Deaconess Medical Center Full time

    Job Type: Regular Time Type: Full time Work Shift: Day (United States of America) FLSA Status: Exempt When you join the growing BILH team, you're not just taking a job, you’re making a difference in people’s lives. Beth Israel Deaconess Medical Center and Harvard Medical School has an exciting opportunity to join our team as a Machine Learning and...


  • Boston, United States Beth Israel Deaconess Medical Center Full time

    Job Type: Regular Time Type: Full time Work Shift: Day (United States of America) FLSA Status: Exempt When you join the growing BILH team, you're not just taking a job, you’re making a difference in people’s lives. Beth Israel Deaconess Medical Center and Harvard Medical School has an exciting opportunity to join our team as a Machine Learning and...


  • Boston, Massachusetts, United States Wayfair Full time

    About the RoleWe are seeking a highly skilled Senior Machine Learning Scientist to join our Bidding and Decisioning team under Wayfair Marketing Science. As a key member of our team, you will be responsible for developing and managing machine learning models and strategies to optimize marketing decisions across paid media channels.Key...


  • Boston, United States Selby Jennings Full time

    Summary:We are looking for a highly skilled and motivated Senior Software Engineer to join our Machine Learning Platforms team. As a Senior Software Engineer, you will be responsible for designing, developing, and scaling ML infrastructure that supports the full ML lifecycle—from data ingestion to model deployment and monitoring. This role requires a deep...


  • boston, United States Selby Jennings Full time

    Summary:We are looking for a highly skilled and motivated Senior Software Engineer to join our Machine Learning Platforms team. As a Senior Software Engineer, you will be responsible for designing, developing, and scaling ML infrastructure that supports the full ML lifecycle—from data ingestion to model deployment and monitoring. This role requires a deep...


  • Boston, United States Selby Jennings Full time

    Summary:We are looking for a highly skilled and motivated Senior Software Engineer to join our Machine Learning Platforms team. As a Senior Software Engineer, you will be responsible for designing, developing, and scaling ML infrastructure that supports the full ML lifecycle—from data ingestion to model deployment and monitoring. This role requires a deep...


  • Boston, United States DataRobot Full time

    DataRobot is the leader in Value-Driven AI, a unique and collaborative approach to generative and predictive AI that combines an open platform, deep expertise and broad use-case experience to improve how organizations run, grow and optimize their business. The DataRobot AI Platform is the only complete AI lifecycle platform that interoperates with an...


  • Boston, United States DataRobot, Inc. Full time

    Senior Manager, Machine LearningDataRobot is the leader in Value-Driven AI, a unique and collaborative approach to generative and predictive AI that combines an open platform, deep expertise and broad use-case experience to improve how organizations run, grow and optimize their business. The DataRobot AI Platform is the only complete AI lifecycle platform...


  • Boston, United States Wasabi Full time

    Role Description: Senior Machine Learning Engineer Role Purpose: Wasabi is seeking an experienced Senior Software Engineer with a solid background in machine learning and software development to contribute to Wasabi AiR. In the spirit of our disruptive approach to cloud storage our AI/ML product, Wasabi AiR resets the paradigm of how cloud storage and...


  • Boston, United States Enigma Full time

    Research Scientist – PyTorch, Diffusion Modeling, Generative Models, Large Language ModelsLocation: United States (Hybrid Work Environment Available)Join a ground breaking team of machine learning researchers, protein engineers, and biologists driving innovation at the intersection of AI and biology. As a Research Scientist, you’ll develop cutting-edge...

  • Senior Data Scientist

    4 weeks ago


    Boston, United States Tech Stars Group LLC Full time

    About the job Senior Data Scientist Senior Data Scientist The Senior Data Scientist will play a pivotal role in providing programming, advanced statistical, and machine learning expertise to our Clinical Data Science team. This position is instrumental in supporting research initiatives focused on digital biomarkers and predictive model development within...

  • Senior Data Scientist

    13 hours ago


    Boston, United States Tech Stars Group LLC Full time

    About the job Senior Data Scientist Senior Data Scientist The Senior Data Scientist will play a pivotal role in providing programming, advanced statistical, and machine learning expertise to our Clinical Data Science team. This position is instrumental in supporting research initiatives focused on digital biomarkers and predictive model development within...


  • Boston, MA, United States Selby Jennings Full time

    Summary:We are looking for a highly skilled and motivated Senior Software Engineer to join our Machine Learning Platforms team. As a Senior Software Engineer, you will be responsible for designing, developing, and scaling ML infrastructure that supports the full ML lifecycle—from data ingestion to model deployment and monitoring. This role requires a deep...


  • Boston, United States Amazon Web Services, Inc. Full time

    The Automated Reasoning Group is looking for a Senior Applied Scientist with expertise in programming language semantics and deductive verification techniques (e.g. Lean, Dafny) to deliver novel code reasoning capabilities at scale. You will be part of a larger organization that develops a spectrum of formal software analysis tools and applies them to...


  • Boston, United States Abnormal Security Full time

    Job DescriptionJob DescriptionAbout the RoleAbnormal Security is looking for an Applied Data Scientist to join the Message Detection - Attack Detection team. At Abnormal, we protect our customers against nefarious adversaries who are constantly evolving their techniques and tactics to outwit and undermine the traditional approaches to Security. That's...


  • Boston, United States Motion Recruitment Partners LLC Full time

    The Company: My client is a Boston-based cybersecurity start-up that helps enterprise companies quantify the financial risks of security risks. The machine learning/data science team is involved in various types of machine learning solutions depending on the needs of specific clients. The prominent project that this team is working on is a large neural...


  • Boston, United States Motion Recruitment Partners LLC Full time

    The Company: My client is a Boston-based cybersecurity start-up that helps enterprise companies quantify the financial risks of security risks. The machine learning/data science team is involved in various types of machine learning solutions depending on the needs of specific clients. The prominent project that this team is working on is a large neural...


  • Boston, United States Motion Recruitment Full time

    We're currently working with a large pharmaceutical company's Data Innovation Lab to improve their internal recommendation engines so they can provide better discounts and offers to their clients. They're looking for a talented machine learning engineer with expertise developing and testing original models and working with recommendation engine algorithms. ...


  • Boston, United States Robotics Technologies LLC Full time

    W-2 Open Positions Need to be Filled Immediately. Consultant must be on our company payroll, Corp-to-Corp (C2C) is not allowed. Candidates encouraged to apply directly using this portal. We do not accept resumes from other company/ third-party recruiters. Job Overview Job ID: J36993 Specialized Area: Machine learning Job Title: Machine Learning...


  • Boston, United States Motion Recruitment Partners LLC Full time

    The Company:My client is a Boston-based cybersecurity start-up that helps enterprise companies quantify the financial risks of security risks. The machine learning/data science team is involved in various types of machine learning solutions depending on the needs of specific clients. The prominent project that this team is working on is a large neural...