Thanks, Hayden. I'm delighted to be here to share more specifics on our strong financial momentum as we enter into a promising 2024. 2023 was a year of heightened uncertainty across the world and in business. Marked by volatility in geopolitical events and capital markets, it was an environment where the rules of the game change rapidly. Within this dynamic, we moved to focus our business on adjusted EBITDA margin and free cash flow generation with tremendous success. In just six months, we moved from negative profitability to a business with adjusted EBITDA margins in the high teens. We showed strong operational agility, quickly identifying opportunities for efficiencies across our business. Our focus on greater efficiency is yielding tremendous results. Our performance marketing engine is working better than ever. In Q4, we saw 20% growth in our new client starts driven by performance marketing, while our CAC in the same period improved by 24% year-over-year. We also had excellent success with higher value client segments, which we expect have an outsized impact on revenue and LTV. And in enterprise sales, we were able to increase our client acquisition in Q4 even with our rationalized sales force. These positive actions helped to drive total active client growth of 5% year-over-year in the fourth quarter. Within the dynamic market environment in 2023, we turned our business into one of steady growth. For the full year 2024, we expect to continue this progress, producing strong year-over-year growth in active clients, revenue, adjusted EBITDA, and adjusted free cash flow. Our momentum exiting 2023 and our plan for 2024 give us conviction that we can provide strong business results and serve our customers even in uncertain economic conditions. This confidence is based on our growing business efficiency, our culture of innovation, and the pipeline of new products that we have planned for 2024 and beyond. For the fourth quarter, GSV again exceeded $1 billion and was $4.1 billion for the full year 2023. Fourth quarter GSV growth was positively impacted, in part by the timing of client payments to freelancers, which included an additional week in Q4 versus the fourth quarter of 2022. Revenue growth again showed sequential acceleration, growing 13.9% year-over-year to $183.9 million, compared to 10.8% growth in Q3. Marketplace revenue was $157.5 million. Turning to our enterprise business unit, I want to note that in accordance with our internal operating model, we are now reporting enterprise revenue separately from marketplace revenue and the business unit includes both managed services and enterprise solutions revenue. In the fourth quarter, total enterprise revenue was flat year-over-year at $26.4 million, which reflects the ongoing macro impacts to this customer segment that we've highlighted throughout 2023. Enterprise revenue increased modestly from Q3 to Q4. Our active client base continues to grow. We added 15,000 new active clients in the fourth quarter of 2023, ending the year with approximately 851,000 active clients. Underpinning this growth in the fourth quarter, we had the strongest year-over-year growth in new client acquisition and reactivated clients in more than two years. Only about a quarter of our new client acquisition comes from performance marketing, so we are also seeing strong organic growth. I want to spend a moment to provide some detail on GSV dynamics. While we continue to see a slight decline in GSV per active client, this is partially attributable to the mix shift to newly activated clients who have lower spend early in their life cycles. Our average client increases their spend on our platform over time. So this new client acquisition is an important indicator of future growth. GSV per newly active client was up modestly year-over-year in the fourth quarter. Non-GAAP gross margin declined slightly on a sequential basis, largely associated with one-time items, but improved nicely year-over-year, both for the fourth quarter of 2023 and also for the full year. Q4 non-GAAP gross margin of 75.3% increased 60 basis points year-over-year. Full year 2023 non-GAAP gross margin of 75.5% increased 120 basis points year-over-year from 74.3% for the full year in 2022. Non-GAAP operating expense was $111.8 million in the fourth quarter, representing 61% of revenue, compared to $121.6 million or 75% of revenue in the comparable prior year period. For the fourth quarter, non-GAAP R&D expense was $39.6 million, increasing 16% year-over-year as we continued to invest in the product innovation and platform enhancements that Hayden has discussed. Non-GAAP sales and marketing expense of $44.9 million declined 24% year-over-year as we maintained our strategy of efficient growth and non-GAAP G&A expenses of $25.1 million grew 15% year-over-year, coming off of two quarters of negative year-over-year growth as we filled some key positions and executed various projects in the fourth quarter. Our provision for transaction losses remains steady at $2.1 million for Q4, representing just 1% of total revenue. Adjusted EBITDA was $30.5 million in the fourth quarter, representing a margin of 16.6%. For the full year 2023, adjusted EBITDA was $73.1 million, our highest ever. Cash, cash equivalents, and marketable securities was approximately $550 million in the fourth quarter, down slightly from approximately $555 million in the prior quarter. This decline is due to the timing of client payments to freelancers that I mentioned earlier. Cash as of January 31st of this year was $608 million, which is more indicative of our growing cash balance trends [than the] (ph) end-of-year result. We are pleased that our profitable business model is translating to GAAP earnings per share growth, which includes the impact of stock-based compensation. For the fourth quarter of 2023, fully diluted GAAP earnings per share was $0.13, and for the full year 2023, it was $0.06 cents. I'm also happy to announce the disclosure of a new metric, adjusted free cash flow. We are starting to report this metric to reflect our commitment to growing profitability and the strong cash yield of our business. Our adjusted free cash flow for the full year 2023 was $48.3 million. Please refer to the key definition slide in our earnings presentation for further detail on the calculation of adjusted free cash flow. Turning to guidance. For the first quarter of 2024, we expect to produce revenue in the range of $183 million to $188 million, representing 15% year-over-year growth at the midpoint. And for adjusted EBITDA, a range of $28 million to $32 million, which represents an adjusted EBITDA margin of 14% at the midpoint. We expect first quarter of 2024 non-GAAP diluted EPS to be between $0.17 and $0.19. For the full year 2024, we are guiding revenue to a range of $760 million to $780 million, representing 12% year-over-year growth at the midpoint. And for adjusted EBITDA, a range of $125 million to $135 million, representing a margin of 17% at the midpoint. I want to highlight that the cadence of quarterly sequential revenue growth is expected to moderate slightly in the back half of 2024. This is primarily due to lapping of the pricing change that we have discussed on prior calls. Our year-over-year growth and adjusted EBITDA margin reflects the profitability of our business model and our commitment to durable profitable growth. We expect full year 2024 non-GAAP diluted EPS to be between $0.77 and $0.81. Stock-based compensation is expected to be in the range of approximately $20 million per quarter for 2024. As we look beyond 2024, it's important to note our key financial priorities. From a top-line perspective, we will be focused on driving growth through innovations in our marketplace offering and driving re-acceleration in our enterprise business unit. At the same time, we will maintain our commitment to growing profit margins. As I've dug into our business over the past year, I continue to have unwavering conviction in our ability to produce durable, profitable growth with expanding margins over multiple years. While we have made great progress in 2023, our journey to increase both efficiency and productivity in this business is still in the early innings. I see many opportunities for ongoing operating leverage through increasing scale, growth of new revenue streams, and ongoing productivity and efficiency improvements. I'm excited about the growth we have planned for 2024, and we as a management team are committed to producing value for our customers, for our employees, and for our shareholders on an ongoing basis. I want to thank our fantastic team at Upwork for their tireless commitment to profitability, growth, and innovation. And with that, we'd be happy to take your questions.