Senior Machine Learning Engineer, Trust and Safety at Upwork (Remote)

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Upwork ($UPWK) is the world's work marketplace. We serve everyone from one-person startups to over 30% of the Fortune 100 with a powerful, trust-driven platform that enables companies and talent to work together in new ways that unlock their potential.
Last year, more than $3.3 billion of work was done through Upwork by skilled professionals who are gaining more control by finding work they are passionate about and innovating their careers.
Despite our success, we believe we can do better, which is why we've assembled a world-class team from around the world in fields ranging from computer science and electrical engineering to economics and statistics. If you're passionate about solving hard problems at big data scale, knowing that your contribution to Upwork is enabling massive economic value and creating social value globally, then please read on.
The ideal candidate for this role will have experience building machine learning solutions for the Trust and Safety (Financial Fraud) team to tackle business challenges. You don't have to have a degree from one of the world's top schools, but you've already done a few big things in your career and can hang with some of the brightest data scientists in the world. One of your hallmarks is your ability to reconcile business needs with what the data is suggesting to come up with new ideas and approaches. In the process, you derive much of your joy at work knowing that your inventions and your job matters.
If you and the team you're on are successful, you will change the company and the world.
Your Responsibilities:
  • This role is with the Upwork ML Trust and Safety team. The ideal candidate should be a talented and hardworking Senior ML Engineer with expert level knowledge of data science practices, SQL, Python and popular machine learning algorithms and packages to develop innovative trust and safety detection capabilities for our platform.
  • You will have the opportunity to work on the vast data sets (structured, unstructured, text, images etc.) in the Trust and Safety domain.
  • You will be working on some business problems that may not have clearly defined requirements and need to be able to do independent research to figure out the details, hypothesize and verify, connect the dots to form the big picture. The ability to think out of the box is desired.
  • You will work with SQL/Snowflake/Python to explore the existing raw data set against the business problems to be solved, derive the first level of data insights via feature engineering techniques, and potentially instrument more complex features via cross-functional backend development with other supporting teams on a regular basis. Statistical data analysis for both the raw data set and model results is also needed.
  • You will experiment with different machine learning packages/algorithms (including but not limited to Classification, Regression, Clustering, Deep Learning, NLP), with a good understanding of the strength/weakness of each algorithm for the problem to solve, and have practical experience with hyperparameter tuning.
  • You will be responsible for the full machine learning model training, testing, and final recommendation process, as well as to support the live auditing process.
  • You will really impress us if you have a good working knowledge of the AWS Sagemaker machine learning platform and have developed a machine learning pipeline/framework on top of this platform. Experience with Databricks/Apache Spark platform is also appreciated.
  • You will need to constantly communicate with the business, analytics, and engineering counterparts to clarify requirements, provide feedback, share the discovered data stories via stats, charts and formal presentations, and finally propose recommendations to maximize the overall business benefit with a controlled cost.
  • This is a long term full-time position.

Must Haves (Required skills / qualifications):
  • Advanced Python/SQL/Snowflake skills to build end to end machine learning models from raw data exploration, to data cleansing, feature extraction, model training/validation, hyperparameter tuning till production model deployment and monitoring etc.
  • Statistical data analysis skills.
  • Work independently and with minimal supervision.
  • Communicate frequently and effectively in English.
  • Deliver high-quality machine learning models with good documentation.
  • Be comfortable with multi-tasking and context switches, with proper time management according to the priorities.
  • Overlap for at least 4 work hours a day on weekdays with the Upwork team located in California.
  • Besides the above, we also highly value your dedication, sense of ownership, and desire to learn and grow.

For all remote roles and roles based in California/Washington: The annual base salary for this position ranges from $175,000 - $237,000. Additionally, this position is eligible for the annual bonus plan or sales incentive plan and eligibility to participate in our long term equity incentive program.
Come change how the world works.
At Upwork, you'll shape talent solutions for how the world works today. We are a remote-first organization working together to create exciting remote work opportunities for a global community of professionals. While we have physical offices in San Francisco and Chicago, currently we also support hiring of corporate full-time employees in 19 states in the United States. Please speak with a member of our recruitment team to determine whether you are located in a state in which we are hiring corporate full-time employees.
Our vibrant culture is built on shared values and our mission to create economic opportunities so that people have better lives. We foster amazing teams, put our community first, and have a bias toward action. We encourage everyone to bring their whole selves to work and grow together through development opportunities, mentorship, and employee resource groups. And oh yeah, we've also got amazing benefits - including medical insurance for you and your family, unlimited PTO, 401(k) with matching, 12 weeks of paid parental leave, and a generous Employee Stock Purchase Plan. Check out our Life at Upwork page to learn more about our benefits and the employee experience.
Check out our Life at Upwork page to learn more about the employee experience.
Upwork is proudly committed to recruiting and retaining a diverse and inclusive workforce. As an Equal Opportunity Employer, we never discriminate based on race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical condition), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.
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Technology we use

  • Engineering
    • JavaLanguages
    • JavascriptLanguages
    • PerlLanguages
    • PHPLanguages
    • PythonLanguages
    • ScalaLanguages
    • SqlLanguages
    • TypeScriptLanguages
    • Node.jsFrameworks
    • SparkFrameworks
    • SymfonyFrameworks
    • TensorFlowFrameworks
    • Vue.jsFrameworks
    • AWS RedshiftDatabases
    • MongoDBDatabases
    • PostgreSQLDatabases
    • PrestoDatabases

Location

Boston, MA

An Insider's view of Upwork

What does your typical day look like?

I love the fact that while I have my day to day job responsibilities, I also have the opportunity to be one of the leaders of the Black Initiative Network. This role allows me to impact the culture at Upwork and outside of Upwork by improving hiring, retention, and career advancement of underserved communities.

Mbaye

Sr. Program Manager, Enterprise Program Success

How has your career grown since starting at the company?

I was fresh out of college when I joined Upwork. Upwork has supported my growth since day 1 and provided me an environment to truly be the best me. I get to use all of the passion that I have for this business with teammates and customers alike. I've grown more at Upwork in the last 4 years than I ever could have imagined.

Meric

Regional Sales Manager

How does the company support your career growth?

Upwork is incredibly supportive of employee professional development. From offering a yearly stipend and LinkedIn Learning memberships to encouraging conference attendance and regularly hosting fireside chats with industry experts, the company constantly encourages us to upskill, learn, and grow.

Kirsten

Social Media Manager

What are Upwork Perks + Benefits

Upwork Benefits Overview

Upwork proudly offers a comprehensive set of benefits to ensure employees are able to bring their whole selves to work. To allow for that, we aim to deliver world-class offerings and perks that cover your medical, dental, vision, emotional and family well-being. If you are an active, regular, full-time employee working a minimum of 20 hours per week you are eligible for all lines of coverage.

Culture
Volunteer in local community
In addition to company organized opportunities, we offer paid time off for volunteering at your favorite local organizations.
Partners with Nonprofits
The Upwork Foundation is Upwork's social impact arm–our goal is to make sure the future of work is inclusive, especially for communities at risk of being left behind by changing technology.
Friends outside of work
Eat lunch together
Intracompany committees
Open door policy
Pair programming
Open office floor plan
Diversity
Dedicated Diversity/Inclusion Staff
Unconscious bias training
Diversity Employee Resource Groups
Our employee resource groups include Up & Out (LGBTQ), Women at Upwork, Black Initiative Network, Que Tal (Latinx), Upwork Veterans, Upwork Family and Asian Professionals for Excellence.
Hiring Practices that Promote Diversity
Health Insurance & Wellness Benefits
Flexible Spending Account (FSA)
Upwork provides an annual HSA contribution. You may also contribute pre-tax dollars to a Health Care FSA and Dependent Care FSA account.
Disability Insurance
Upwork offers both short term disability (STD) and long term disability(LTD) insurance.
Dental Benefits
Upwork provides your dental coverage through MetLife with a PPO plan offering.
Vision Benefits
VSP Vision offers a broad array of services for employees at Upwork.
Health Insurance Benefits
We offer Anthem Blue Cross PPO and HSA plans and you may choose the best plan for you and your family.
Life Insurance
Life Insurance coverage of 2X up to $300,000. Employees can also purchase coverage for a Spouse/DP and child(ren).
Pet Insurance
Nationwide Pet Insurance now provides coverage to all pets within your life!
Wellness Programs
Upwork offers an on demand mental health platform, Ginger.IO, along with a parenting support tool, Cleo.
Onsite Gym
Mental Health Benefits
Retirement & Stock Options Benefits
401(K)
Upwork offers a traditional pre-tax 401(K) along with an after-tax Roth IRA option.
401(K) Matching
Upwork matches 50% of every dollar contributed by employees into their 401(k) up to $5,000 per year. Employers match is fully vested after 1 year of service.
Company Equity
Upwork offers equity as part of our standard compensation package.
Employee Stock Purchase Plan
We allow qualified employees to purchase company shares at a discounted price.
Performance Bonus
Child Care & Parental Leave Benefits
Child Care Benefits
Upwork offers dependent care flexible spending accounts. In addition, we offer a $100 monthly credit from Trusted for backup and emergency child care services.
Generous Parental Leave
Upwork provides employees time to bond with their newborn and family. We offer up to 12 weeks of fully Paid Parental Leave.
Remote Work Program
Upwork encourages a healthy work-life balance. For your convenience we allow you to work from home on Wednesdays.
Family Medical Leave
For eligible employees, FMLA provides up to 12 weeks of unpaid leave for any circumstances regarding your personal health condition or to take care of a family member.
Adoption Assistance
Upwork will reimburse up to $3,000 for eligible fertility or adoption related expenses per plan year.
Company sponsored family events
Vacation & Time Off Benefits
Unlimited Vacation Policy
Generous PTO
Paid Volunteer Time
The Upwork Foundation has asked that 1% of employees time be used for giving back to the community and volunteering.
Paid Holidays
Paid Sick Days
Perks & Discounts
Beer on Tap
Casual Dress
Commuter Benefits
You can elect up to max of $260 pre-tax for transit and parking. Upwork will match 50% of your pretax contributions each month.
Company Outings
Free Daily Meals
Upwork provides lunch on a daily basis from local Chicago restaurants.
Game Room
Stocked Kitchen
Upwork has a fully stocked kitchen including unlimited snacks, coffee, tea and all of the flavored LaCroix you can handle.
Happy Hours
Recreational Clubs
Fitness Subsidies
We reimburse employees up to $50 per month for fitness related expenses. We have a corporate partnership with 24 Hour Fitness, but you can apply to your preferred gym or approved wellness expense.
Home Office Stipend for Remote Employees
Professional Development Benefits
Job Training & Conferences
Diversity Program
Lunch and learns
Promote from within
Time allotted for learning
Online course subscriptions available

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