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The Lead Machine Learning Engineer will be responsible for designing and delivering infrastructure and models for agentic LLM workflows. They will work on cutting-edge machine learning initiatives, mentor engineers, and contribute to the broader AI research community. This role involves architecting and implementing infrastructure for agent-based LLM systems, training and fine-tuning custom models, leading cross-functional collaboration, and translating experimental ideas into scalable production systems. The engineer will also contribute to Upwork’s visibility in the broader AI/ML research community.

Senior Lead Machine Learning Engineer

<div>Upwork ($UPWK) is the world’s largest work marketplace, connecting businesses with highly skilled professionals worldwide. From entrepreneurs to Fortune 100 enterprises, companies trust Upwork’s platform to access expert talent, leverage AI-powered work solutions, and drive meaningful business outcomes. Upwork’s AI-powered platform has facilitated over $20 billion in economic opportunity for professionals worldwide. With professionals spanning 10,000+ skills, including AI and machine learning, software development, sales and marketing, customer support, finance and accounting, and more, Upwork empowers businesses of all sizes to scale, innovate, and build agile teams. <hr> We’re looking for a&nbsp;Lead AI/ML Engineer to help shape the future of intelligent systems at Upwork. In this role, you’ll design and deliver cutting-edge infrastructure and models that power agentic LLM workflows across our platform. You’ll work at the intersection of research and production, owning the delivery of advanced ML solutions and driving business outcomes through applied innovation.&nbsp; This role offers the chance to lead high-impact projects, support and mentor others, and help shape the future of autonomous AI agents globally. You'll work on cutting-edge machine learning initiatives that drive real business results while contributing to the broader AI research community through publications at leading conferences. <h3>Responsibilities</h3> <ul> <li>Architect and implement core infrastructure to support agent-based LLM systems, including multi-agent pipelines, RAG, and real-time orchestration.</li> <li>Train and fine-tune custom models, including LLMs and foundation models, to solve unique Upwork-specific challenges.</li> <li>Lead cross-functional collaboration across engineering, product, and research teams to align technical solutions with business impact.</li> <li>Mentor and guide engineers and researchers, helping foster a high-performing, inclusive team culture grounded in AI excellence.</li> <li>Translate experimental ideas into reliable, scalable production systems by applying best practices in AI engineering and deployment.</li> <li>Publish and share innovations where appropriate, contributing to Upwork’s visibility in the broader AI/ML research community. &nbsp;</li> </ul> <h3>What it takes to catch our eye</h3> <ul> <li>Strong proficiency in Python and modern ML frameworks such as PyTorch or TensorFlow, with experience developing and deploying AI systems.</li> <li>Deep understanding of core ML concepts, including transformers, generative models, and agent architectures such as MCP or A2A.</li> <li>Experience training large models on GPU clusters and integrating LLMs with external tools via APIs or orchestration frameworks.</li> <li>Comprehensive understanding of foundational deep learning, machine learning concepts, and state-of-the-art GenAI models.</li> <li>Hands-on experience training custom LLMs on GPUs and working with Retrieval-Augmented Generation (RAG) systems.</li> <li>Proven ability to build end-to-end ML pipelines—from data prep and experimentation to production deployment—in a cloud-native environment.</li> <li>A growth mindset, strong communication skills, and the ability to translate complex technical work to stakeholders across functions.</li> <li>Demonstrated experience working in R&amp;D environments; publications in major AI/ML conferences are a plus, but not required.</li> </ul> <hr> Come change how the world works. 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 21 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 target="&quot;_blank&quot;"> 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 target="&quot;_blank&quot;"> Careers</a> page and follow us on<a target="&quot;_blank&quot;"> LinkedIn</a>,<a target="&quot;_blank&quot;"> Facebook</a>,<a target="&quot;_blank&quot;"> Instagram</a>,<a target="&quot;_blank&quot;"> TikTok</a>, and<a target="&quot;_blank&quot;"> X</a> to learn more about life 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.</div>

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The Renewal Account Executive manages Rocket Software clients and partners, focusing on maintaining and growing renewal rates, and establishing partner/client relationships to retain customers and identify upsell opportunities. Responsibilities include communicating the maintenance value proposition, managing negotiations, writing proposals, and completing renewals before the due date. They also serve as a liaison between customers and Rocket teams to resolve escalated issues to maximize maintenance revenue. They are the primary owner for executing the overall contract renewal process, following established procedures, and consistent Renewal Sales.

Companies around the world trust Rocket to solve their most complex business challenges by powering their critical infrastructure, business processes, and data. We help extend the value of these assets, enabling our customers to embrace the potential of cloud and mobile computing, advanced analytics, and the innovations of tomorrow. From the clothes we wear to the cars we drive, Rocket solutions power the back-end systems that thousands of brands rely on every day.At Rocket, software is about more than just code—it’s about people. We are passionate problem-solvers, working to make a difference for others. Our foundation is built on empathy, humanity, trust, and love, and we strive to embody these core values in everything we do. Whether we’re serving our customers, partners, or fellow Rocketeers, we are committed to treating everyone with the respect and care they deserve.

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They are the primary owner for the execution of the overall contract renewal process by following established procedures and consistent Renewal Sales.Essential Duties and Responsibilities:Build long term relationships with key customers (region/revenue size dependent) (50%)<ul><li>Proactive and regular customer outreach</li><li>Profile and document customer intel</li></ul>Minimize cancellations/ Maximize renewal revenue (25%)<ul><li>Manage price increases in renewal opportunity process</li><li>Educate the value of support</li><li>Negotiate renewals</li></ul>Liaise with Rocket teams (10%)<ul><li>Collaborate with Sales Account Executives regarding issues or concerns surrounding the successful selling of renewals to their accounts</li></ul>Cross/Upsell (15%)<ul><li>Identify new opportunities for additional capacity and cross sell and refer those opportunities to Sales Account Executives</li><li>Handle complex escalations</li><li>Monitor renewal metrics for success&nbsp;</li><li>Renewal forecasting and pipeline reporting</li></ul>Required Qualifications: <ul><li>5+ years equivalent business experience, with preferable 2+ years in managing customer relationships</li><li>Strong written and verbal communication skills; strong German language skills are required.</li><li>Experience with a sales automation system, preferable&nbsp;Salesforce.com</li><li>Ability to influence and negotiate</li><li>High Energy and passion towards solving customer needs</li><li>Customer Focus: Proactive, responsive, and focused on discovering, anticipating, and meeting the customer’s needs by leveraging internal resources</li><li>Resilience: Persists in the face of obstacles or rejection. Does not give up when things do not go smoothly.</li><li>Ability to be set and achieve goals with minimal management support/coaching.</li><li>Committed to Rocket Software core values of Empathy, Trust, Humanity and Love</li></ul>Information Security:Information security is everyone’s responsibility.&nbsp; A fundamental principle of information security at Rocket Software is that all individuals in the organization have a responsibility for the security and protection of company information and IT Resources over which they have control, according to their role.Diversity, Inclusion &amp; Equity:At Rocket we are committed to an inclusive workplace environment, where every Rocketeer can thrive by bringing their full selves to work. Being a Rocketeer means you are part of our movement to continually drive inclusivity, diversity and equity in our workforce.#LI-SD1#LI-Remote.This position is eligible for commissions in accordance with the terms of the company’s plan.What Rocket Software can offer you in Vilnius: <ul><li><h2>Health Insurance: Choose from 3 great options!</h2></li><li><h2>Generous Time Off: Enjoy 25 days of annual leave, plus Juneteenth as an extra day off for everyone.</h2></li><li><h2>Rocket enhanced parental leave benefit.</h2></li><li><h2>Easy Sick Days: Get 6 days of fully paid sick leave without needing a medical certificate.</h2></li><li><h2>Employee Assistance Program – Digital Courses &amp; Meditations, Certified Personal Coaching &amp; Personal Therapy sessions.</h2></li><li><h2>Workcation Policy: Enjoy the flexibility to work from a vacation spot, combining work and leisure.</h2></li><li><h2>Choose your own hybrid/remote work model.</h2></li><li><h2>Tuition Reimbursement and Certificate Reimbursement Program opportunities.</h2></li></ul>Annual salary range for this position is between €27,000.00 - €50,200.00 gross before taxes.Salary range applies only to candidates in LithuaniaSalary offer for the candidate is determined based on the predefined salary ranges for the position and depends on the level of competence and experience of the candidate.Rocket Software Inc. is committed to creating a diverse environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. Rocket Software Inc. is also committed to compliance with all fair employment practices regarding citizenship and immigration status.Rocket is committed to working with and providing reasonable accommodation to individuals with physical and mental disabilities. &nbsp;If you need special assistance or an accommodation while seeking employment, please call: 781-577-4321 or send an email to people@rocketsoftware.com. &nbsp;We will make a determination on your request for reasonable accommodation on a case-by-case basis.If you like wild growth and working with happy, enthusiastic over-achievers, you'll enjoy your career with us!

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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

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