upwork

Sr Lead Machine Learning Engineer

Lead Machine Learning Engineer/Scientist - Algorithms & Research

Lead Machine Learning Engineer/Scientist, Algorithms & Research

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Senior Lead Machine Learning Engineer, Agentic AI

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Senior/Lead Javascript Developer

Upwork is seeking a Sr Lead MLE/Applied Scientist to define success metrics for AI agents in real-world tasks. This role focuses on building trust and quality into agentic systems by developing rigorous, reproducible evaluation frameworks. You will work cross-functionally to assess human+AI collaboration outcomes, going beyond accuracy to understand what truly benefits freelancers and clients. Join to revolutionize agent evaluation and significantly impact AI systems shaping the future of work.

Senior Lead Research Scientist, Agentic AI

Upwork ($UPWK) is the world’s human and AI-powered work marketplace that connects businesses with highly skilled, AI-enabled independent talent from across the globe. From entrepreneurs to Fortune 100 enterprises, companies rely on Upwork’s trusted platform and its mindful AI companion, Uma, to find and hire expert talent, leverage AI-powered work solutions, and drive business transformation. With on-demand access to professionals spanning more than 10,000 skills across AI & machine learning, software development, sales & marketing, customer support, finance & accounting, and more, Upwork enables businesses of all sizes to scale, innovate, and build agile teams for the age of AI and beyond.Upwork’s platform has facilitated more than $25 billion in economic opportunity for talent around the world. Learn more at <a href="http://upwork.com/" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Upwork.com</a> and follow us on <a href="https://www.linkedin.com/company/upwork" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">LinkedIn</a>, <a href="https://www.facebook.com/upwork" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Facebook</a>, <a href="https://www.instagram.com/upwork/" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Instagram</a>, <a href="https://www.tiktok.com/@upwork" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">TikTok</a>, and <a href="https://twitter.com/upwork" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">X</a>.***We're looking for a Sr Lead MLE/Applied Scientist to define how success is measured for AI agents performing real-world tasks. This role is at the forefront of building trust and quality into agentic systems by crafting rigorous, reproducible evaluation frameworks that shape what we ship. You’ll work cross-functionally to evaluate human+AI collaboration, assess outcomes beyond accuracy metrics, and uncover what’s truly working for freelancers and clients. Join us in revolutionizing agent evaluation and making a measurable impact on AI systems that power the future of work.<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Responsibilities</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Design and implement comprehensive evaluation frameworks that reflect real-world task success for agentic systems, with a focus on human+AI collaboration outcomes</li><li class="leading-relaxed">Build benchmarking pipelines that capture nuanced success indicators including trust calibration, intervention frequency, and agent handoff quality</li><li class="leading-relaxed">Lead development of observability tools and instrumentation for analyzing agent behavior in production</li><li class="leading-relaxed">Translate complex qualitative and quantitative signals into actionable insights that inform model iteration and product prioritization</li><li class="leading-relaxed">Collaborate with researchers, engineers, and product teams to align evaluation methodologies with business and user goals</li><li class="leading-relaxed">Own benchmarking infrastructure that enables reproducible, scalable evaluation across AI initiatives</li><li class="leading-relaxed">Champion rigorous experimental design and statistical analysis across teams to ensure consistent and meaningful measurement standards</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">What it takes to catch our eye</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Proven experience designing evaluation systems for agentic or LLM-based AI, ideally in complex, interactive or open-ended environments</li><li class="leading-relaxed">Deep expertise in statistical experimentation, benchmark creation, and human-AI interaction assessment</li><li class="leading-relaxed">Fluency in building data pipelines and tooling using Python, SQL, and distributed data processing frameworks</li><li class="leading-relaxed">Demonstrated ability to influence product and model roadmaps through evaluation insights and performance measurement</li><li class="leading-relaxed">Adaptive-level proficiency in integrating AI tools into technical workflows for analysis, experimentation, and observability refinement</li></ul>***<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Come change how the world works.</h3>At Upwork, you’ll shape the future of work for a global, remote-first workforce, creating economic opportunities for professionals worldwide. While we have a physical office in Palo Alto, we currently hire full-time employees in 34 U.S. states, making it easier than ever to join our mission from wherever you call home.Our culture is built on trust, risk-taking, customer focus, and excellence, all in service of our core mission: to create economic opportunities so people have better lives. We embrace authenticity and inclusion, encouraging everyone to bring their whole selves to work. Personal and professional growth is a priority here, supported through development programs, mentorship, and our Upwork Belonging Communities.We’re proud to offer benefits that go beyond the basics, including comprehensive medical coverage for you and your family, unlimited PTO, a 401(k) plan with matching, 12 weeks of paid parental leave, and an Employee Stock Purchase Plan. Visit our <a href="https://www.upwork.com/careers/life-at-upwork" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Life at Upwork</a> page to learn more about our values, working principles, and the overall employee experience.Ready to help shape the future of work? Check out our <a href="https://careers.upwork.com/" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Careers</a> page to learn more about opportunities at Upwork.Upwork is an Equal Opportunity Employer committed to recruiting and retaining a diverse and inclusive workforce. We do not discriminate based on race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, or other legally protected characteristics under federal, state, or local law.Please note that a criminal background check may be required once a conditional job offer is made. Qualified applicants with arrest or conviction records will be considered in accordance with applicable law, including the California Fair Chance Act and local Fair Chance ordinances.The annual base salary range for this position is displayed below. The range displayed reflects the minimum and maximum salary for this position, and individual base pay will depend on your skills, qualifications, experience, and location. 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.Annual Base Compensation$195,000 - $308,000 USDPlease note that a criminal background check may be required once a conditional job offer is made. Qualified applicants with arrest or conviction records will be considered in accordance with applicable law, including the California Fair Chance Act and local Fair Chance ordinances. The Company is committed to conducting an individualized assessment and giving all individuals a fair opportunity to provide relevant information or context before making any final employment decision.To learn more about how Upwork processes and protects your personal information as part of the application process, please review our <a href="http://upwork.com/careers/job-applicant-privacy-notice" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Global Job Applicant Privacy Notice</a>Create a Job AlertInterested in building your career at Upwork? Get future opportunities sent straight to your email.<a href="https://my.greenhouse.io/users/signin?jobboard=upwork&source=jobalertpost" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Create alert</a>

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- This assessment gives us an idea of your C++ skills - Companies that evaluate this skillset in interviews: Rockstar Games, Ubisoft, Mayhem Studios, etc. - 10 Multiple Choice questions - Average time to complete: 7 to 10 minutes

Let's assess your Data Structures! 📋 &nbsp;- This assessment gives us an idea of your problem solving skills using DSA - Companies that evaluate this skillset in interviews: MPL, LILA Games, GSN Games, etc. - 10 Multiple Choice questions - Average time to complete: 7 to 10 minutes

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Condé Nast

Editorial Assistant, British Vogue

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British Vogue is seeking a highly organized and proactive Editorial Assistant to support the Head of Editorial Content and the wider editorial team. This role is crucial for the smooth operation of the editorial department, involving administrative, logistical, and coordination responsibilities in a fast-paced, creative environment. The assistant will manage diaries, travel, expenses, and communication, while also assisting with research, fact-checking, and social media coordination. The position offers significant exposure to British Vogue's inner workings and collaboration with senior staff.

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Senior Manager - Facilities

The foundation of Vogue’s leadership and authority is the brand’s unique role as a cultural barometer for a global audience. Vogue places fashion in the context of culture and the world we live in — how we dress, live and socialize; what we eat, listen to and watch; who leads and inspires us. Vogue immerses itself in fashion, always leading readers to what will happen next. Thought-provoking, relevant and always influential, Vogue defines the culture of fashion.<h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Job Description</h2>Location:London, GBCondé Nast is a global media company, home to iconic brands including <a href="https://www.vogue.co.uk/" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Vogue</a>, <a href="https://www.gq-magazine.co.uk/" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">GQ</a>, <a href="https://www.glamourmagazine.co.uk/" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Glamour</a>, <a href="https://www.cntraveller.com/" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">CN Traveller</a>, <a href="https://www.vanityfair.com/?srsltid=AfmBOoqzTBFZnVHhFwQWV6XwfpphPrz6ZXNumj1XhNlEEjDhWVQRc69W" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Vanity Fair</a>, <a href="https://www.wired.com/" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Wired</a>, <a href="https://www.worldofinteriors.com/" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">The World of Interiors</a>, <a href="https://www.houseandgarden.co.uk/" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">House & Garden</a> and <a href="https://www.tatler.com/" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Tatler</a>, among many others.We are headquartered in New York and London and operate in 32 markets worldwide, with a footprint of more than 1 billion consumers across print, digital, video and social platforms.Condé Nast thrives on collaboration, and our teams come together in the office four days a week (Monday - Thursday).We value diversity of background, views and cultures. We celebrate people for their personal qualities, skills and contributions, recognising the power our brands have to influence and shape culture.<h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">The Role</h2><a href="http://www.vogue.co.uk/" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">British Vogue</a> is looking for a highly organised, detail-oriented and proactive Editorial Assistant to support the Head of Editorial Content and the wider editorial team.This role is essential to the smooth running of the editorial department and involves a range of administrative, logistical and coordination responsibilities within a fast-paced, creatively driven environment.The ideal candidate will be confident, efficient and collaborative, with excellent communication skills and a strong ability to prioritise.The Editorial Assistant will serve as a key point of contact across internal teams and external partners, requiring professionalism, discretion and a calm approach under pressure.While this role may occasionally involve light editorial tasks, the primary focus is on administrative support and departmental organisation.This position offers exposure to the inner workings of British Vogue and close collaboration with senior editorial staff.<h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">What will you be doing?</h2><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Support the editorial team with daily operational and administrative tasks.</li><li class="leading-relaxed">Manage the Head of Editorial Content’s diary, schedule, expenses and meeting coordination.</li><li class="leading-relaxed">Manage all travel arrangements for the Head of Editorial Content, including flights, accommodation, ground transportation and visas - prepare comprehensive travel itineraries, coordinate schedule changes, and ensure all logistics are handled efficiently and in line with budget and company policy.</li><li class="leading-relaxed">Maintain smooth communication between editorial leaders, internal departments and external stakeholders.</li><li class="leading-relaxed">Manage general editorial logistics, including office administration.</li><li class="leading-relaxed">Coordinate documents, image assets, call-ins, permissions and other materials needed for stories and shoots.</li><li class="leading-relaxed">Assist in planning team events, appointments and work sessions.</li><li class="leading-relaxed">Assist senior editors with research, fact-checking, sourcing references and preparing briefing materials.</li><li class="leading-relaxed">Support the Head of Editorial Content with social media coordination.</li></ul><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">About you</h2><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Proven experience in an administrative or coordination role, ideally within media, fashion or a related creative industry.</li><li class="leading-relaxed">Exceptional organisational skills, strong attention to detail and the ability to manage multiple priorities simultaneously.</li><li class="leading-relaxed">Strong written and verbal communication skills and a professional, polished demeanour.</li><li class="leading-relaxed">Comfortable working in a fast-paced environment and adapting to changing needs.</li><li class="leading-relaxed">A proactive problem-solver with sound judgement and a positive, collaborative attitude.</li><li class="leading-relaxed">A genuine interest in fashion, culture and the editorial values of British Vogue.</li></ul><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Does this sound like you?</h2>Please upload your CV and cover letter, which highlights why you'd love to take on this role and why you're a great match for what we're looking for.We value the time and effort behind every application. All submissions are reviewed by a member of our talent team - we don’t use AI-assisted technology to review applications.The closing date for applications is Friday, 16th January at 10 am.As you can imagine, we receive a high volume of applications and may close the advert early. We recommend submitting your application as soon as possible to avoid disappointment.<h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">What benefits do we offer?</h2><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">25 days holiday (plus bank holidays) and extra days of annual leave if you move house or want to volunteer.</li><li class="leading-relaxed">You’ll have access to a competitive pension scheme, Bupa Private Healthcare, Season ticket loans and eye tests.</li><li class="leading-relaxed">We offer a range of tools to support your wellbeing, including core hours, 10 remote days (from home or a country with a Condé Nast office location), access to our Employee Assistance Programme, corporate gym membership and cycle to work scheme.</li><li class="leading-relaxed">We’re a dog friendly office, plus you’ll enjoy discounts and magazine subscriptions, keeping you up to date with all things Condé Nast.</li><li class="leading-relaxed">We encourage personal and professional growth through the Condé Nast Learning Hub where you’ll find an extensive portfolio of learning courses and training, available in local languages.</li><li class="leading-relaxed">Our Employee Resource Groups provide a platform for employees to identify shared objectives, exchange ideas, and work on community priorities for our global workforce.</li></ul><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">What happens next?</h2>If you are interested in this opportunity, please apply below, and we will review your application as soon as possible. You can update your resume or upload a cover letter at any time by accessing your candidate profile.Condé Nast is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, age, familial status and other legally protected characteristics.

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This assessment gives us an idea of your C++ skills- Companies that evaluate this skillset in interviews: Rockstar Games, Ubisoft, Mayhem Studios, etc.- 10 Multiple Choice questions- Average time to complete: 7 to 10 minutes

Let's assess your Data Structures! - This assessment gives us an idea of your problem solving skills using DSA- Companies that evaluate this skillset in interviews: MPL, LILA Games, GSN Games, etc.- 10 Multiple Choice questions

Data Structures and Algorithms

Let's assess your Programming Patterns! ????- This assessment gives us an idea of your code architecture skills- Companies that evaluate this skillset in interviews: Dirtcube, PTW, Playshifu, etc.

Programming Patterns

Let's assess your OOPs skills! ????- This assessment gives us an idea of your fundamental OOPS concepts and Solid principles skills- Companies that evaluate this skillset in interviews: Hitwicket, GSN Games, Tomo Club, etc.

Object Oriented Programming

Let's assess your Unity Skills ????- This assessment gives us an idea of your Unity fundamentals- Companies you can apply for after taking this assessment: Godspeed games, Salvation Games, nCore Games, etc.