My colleagues have written the following recommendations for me.
This content comes from the original recommendatons from LinkedIn. I do not fully trust LinkedIn to maintain these recommendations, so I have reproduced them here.
Job titles and companies listed below are as of March, 2026.
(See also In my own words further below.)
I had the privilege of working alongside David during my time as Chief Product Officer at Apiture and then as SVP of Product at CSI following the acquisition. David is one of those rare technologists who doesn’t just understand APIs - he understands why they matter to the business, to the developer community, and to the customers who ultimately depend on them.
As Chief API Officer, David owned Apiture’s API strategy end to end, and his fingerprints are on every aspect of what made our platform credible in the market. He didn’t just design APIs - he built a culture around API excellence, from establishing Apiture University as an internal training program to representing us at industry conferences and in the broader API community. His thought leadership through his writing, speaking, and contributions to organizations like Financial Data Exchange gave Apiture a voice well above our weight class.
What I appreciated most about working with David is that he brought a product mindset to deeply technical work. In a space like digital banking where integration is everything, having someone who could articulate API strategy in terms that resonated with product leaders, engineers, and clients alike was invaluable. He made everyone around him sharper.
David is the kind of leader who elevates an entire organization. Any company serious about their API strategy or developer experience would be lucky to have him.
I had the pleasure of working with David in his capacity as Chief API Officer at Apiture. In this role, David led a team of API architects designing dozens of exceptional APIs for both internal and external consumers, implemented governance tooling, and guided other associates through API-centric requirements creation. He also served as the primary developer relations contact and advocated for excellence in developer-facing tooling and functionality. David’s eye for detail and builder mentality made him incredibly effective in this role, and his contributions led to what is now Apiture’s catalog of APIs and Developer Portal.
While David is an excellent software practitioner, I feel that his thought leadership in the API community and natural affinity for mentorship set him apart as a true leader. He freely gives his time and effort to others in order to help them succeed. In fact, David singlehanded led the Apiture University program where, on a bi-weekly basis, associates would present to others on various topics - all in the spirit of community improvement. He is a regular guest in blogs and podcasts where he offers various insights from his time in the industry and own knowledge of APIs. Ever the developer, David also contributes regularly to open source software by creating his own and offering his expertise to other projects.
David was a transformative leader at Apiture and has immensely contributed to my own skills and career, as well as many others. I cannot recommend him enough for leadership roles in any organization that would benefit from an experienced, detail-oriented, community-minded individual.
I’ve had the pleasure to work with and alongside David for nearly a decade. While brief words won’t do him justice, David is a consummate professional whom I would highly recommend, no matter the position. I ran a digital finacial product domain, and David intersected with me as Chief API officer. His approach was holistic and objective - always asking the right questions, the tough questions. Challenging the why, ensuring edge cases were considered and thought through, all the while protecting the integrity of the product, project, and the company at the same time. He is remarakable in his ability to see through multiple lenses, from the deepest of weeds to the highest of clouds. His output is impeccable. His leadership and collaboration, as witnessed by his self-created “Apiture University”, are second to none. He is a man of integrity, and I am only sorry to see him bring those talents elsewhere. David is an outstanding all around individual, and I’m beyond happy to discuss him further should anyone inquire.
I have known David for roughly a decade now. I met him when he began attending, engaging, and speaking at conferences on APIs I was producing and leading. Over this decade I have been regularly introduced to David’s immense curiosity when it comes to the finer details of producing and consuming APIs. David gets APIs. He possess a deep understanding of OpenAPI, JSON Schema, and the specifications the industry uses to produce and consume APIs, but he also has a passion for API design and developer experience that pushes David into a class of API architects, designers, and artisans that drive the discipline forward and help negotiate the best standards we can all use to produce and consume APIs.
David has seen and demonstrated why API design matters for some time now, making him an asset when it comes to API design, API strategy, API governance. David has both the strategic and tactical experience required to lead any API center of excellence, governance, or platform group. I regularly invite David to do webinars, podcasts, and speak at any events I produce because he gets the space and can deliver on whatever he talks, but also show up and tell a compelling story on what APIs matter to business operations today.
If you get a chance to work with David, I highly recommend it. You will learn a lot along the way.
I had the privilege of working closely with David for the past 4.5 years, and I can say without hesitation that he is one of the most impactful leaders I have worked with.
As Chief API Officer, David brings clarity, vision, and structure to how we think about and build APIs. He was instrumental in establishing a strong API strategy at Apiture and in driving a true API-design-first approach, balancing long-term architectural integrity with real, practical business needs.
His ability to translate complex functional requirements into clean, well-designed APIs is exceptional, and his insights consistently elevated both the solutions and the teams delivering them.
Beyond his technical leadership, David is a thoughtful mentor who genuinely invests in the growth of others. He encourages discussion, challenges assumptions in constructive ways, and creates space for learning. A standout example of this is Apiture University, which he helped establish to foster knowledge sharing and continuous learning across the organization-an initiative that has had lasting value and impact.
David leads with vision, humility, and purpose. I have respect for his leadership, his strategic mindset, and his commitment to building both great APIs and great teams. Any organization would be fortunate to have him at the helm of their API strategy.
I had the pleasure of working closely with David for over 8 years, and I can confidently say he is one of the most talented and dedicated individuals I’ve met. His ability to break down complex domains into clear, logical components is exceptional, and his deep expertise in API design and architecture drives consistent, thorough, and user-friendly solutions.
David is an incredibly hard-working individual and a major contributor to every initiative he leads. His thoughtful leadership and influence extend far beyond his immediate team, shaping strategy and elevating the quality of work across the organization. He is not only a trusted subject matter expert but also someone who inspires those around him to think bigger, deliver their best, and continuously grow.
What truly sets David apart is his passion for sharing knowledge. He actively mentors team members, leads workshops, and fosters a culture of learning, ensuring his expertise benefits the entire organization. His willingness to guide others with his clear, approachable way of explaining complex topics make him a natural teacher and a catalyst for team growth.
David is a true professional and a pleasure to work alongside. The combination of technical knowledge, experience, dedication, mentorship, and positive influence makes him an invaluable contributor, and I highly recommend him to any organization seeking a leader in software.
I have worked alongside David since we founded Apiture in 2017. David’s reputation as an API design expert is well earned. He blends deep technical expertise and thought leadership with a very practical, hands-on approach to delivering high-quality API architecture.
Just as importantly, David is a generous mentor who invests time in helping others grow and raising the bar across the organization. I personally have learned much from David, and I know the same is true for many at Apiture.
David understands why APIs matter to modern businesses, and he has led Apiture’s journey to becoming an “API first” company.
David is extremely knowledgeable about all facets of API design and development. When designing solutions, he is always thinking about not just solving the current problem, but also how the design will evolve and change in the future. He gives targeted, helpful feedback and listens to the ideas of others. He has been an exceptional manager and was always supportive of my growth. I would highly recommend him.
I’ve had the privilege of working under David’s leadership in API design and governance, and he has made a lasting impact on both my technical growth and professional development. He leads with humility and steadiness. DJB is intentional about developing the people around him, not just by offering guidance, but by finding real opportunities to stretch, contribute, and grow. He balances technical depth with emotional intelligence in a way that builds trust and raises the standard for everyone around him. I’m grateful for his mentorship and would highly recommend him to any organization looking for a thoughtful, empowering leader.
I had the singular privilege of working with directly David as a part of SAS’ REST API initiative. I consider him an expert in REST API design and the impact REST API can have on modern day business. He single handedly formulated and documented REST API standards for SAS which continues to be used as a touchstone across all APIs within the company. A communicator par excellence, his standards’ document can be considered as a reference template for anyone who wishes to develop, document and communicate standards organization-wide. As a keen executor, he understood that that REST API based design was a paradigm shift for SAS and he conducted a number of effective training sessions spanning geographies to help teams provide a jumpstart. Being on authority on REST API design, he was often consulted to assist teams in their product specific designs and these consultation sessions eased the teams’ transition to REST APIs.
David possess a unique ability to traverse both breadth and depth of technological matrix, a rare trait in technological leadership.
He inspires trust and respect which enables him to rally people enthusiastically around organizational goals. His personal charisma and technical leadership qualities drove participation from across multiple departments in SAS leading to the tremendous success of the REST API company-wide initiative.
It has been my good fortune to have worked with David as my mentor as he steered the development of an automation tool for verification of REST API standards. He not only guided me technically but also highlighted my work within the community and helped position the automation tool across SAS leading to its widespread adoption. David is a capable and compassionate mentor who is able to encourage and support mentees and also orient their aspirations with organizational goals. I found him to be very soft spoken, always polite and extremely approachable during our interactions.
As a seasoned technology leader and evangelist, David is an asset to any organization he works with.
David is one of the most innovative people I know. He’s always looking for new and better ways to do everything, not just for himself but for all the people in his organization. One thing that stands out about David is that he never accepts less than the best from those he works with, so he’s always challenging you to do better. I learned a lot from our time working together.
I had the pleasure of working with Dave within the SAS Technology Office. We worked together to define software architecture and provide technical direction for the latest generation of SAS products and solutions.
Dave is an incredibly talented technical leader who constantly keeps abreast of industry trends and the latest techniques for building enterprise software. His breadth and depth of expertise in developing APIs and cloud-native applications is impressive, a true asset to any modern organization. Additionally, he is a great teacher, with a ton of patience, who enjoys spreading his knowledge to support the production of high quality software.
Below is some additional information so that you can get to know me more fully.
I get the most reward from intellectual curiosity and sharing knowledge. In my job, this trait helped me learn from domain experts so that I could map their knowledge into strong software solutions which helped deliver the right features. I use my curiosity to inspire learning in others, and actively create learning opportunities. At Apiture, I was given the nickname “Professor” because of my desire to learn from and teach others.
My favorite book is Gödel, Escher, Bach: An Eternal Golden Braid by Douglas Hofstadter. In other words, see my previous answer :-)
As an undergraduate student studying Computer Science, discovering and reading this book inspired me to be curious and to really think about the foundations and meaning of human intelligence and self-awareness, the ideas behind programming languages, self reference, and computing systems, and the joy of thinking about…. thought.
As an amateur photographer, I’ve always been drawn to architecture. I think a building can be a form of art, so If I were to create a piece of art, I would like to create a building that is a true expression of its purpose and make it a joy to use, to reside in, to work in, or to just exist in. It would connect to and exist within nature, sheltering people as a building needs to, but not shutting them out of the beauty of nature.
My father, David R. Biesack, was a volunteer youth football coach as I was growing up. Observing him taught me the value of leadership and coaching - how to inspire people to be their personal best, even if they think they are not the “best” or most important player on the team. The team only succeeds if everyone contributes to their fullest. Leading by example, strength, consistency, respect, making personal connections, compassion, humility, humor, and winning and losing with grace, are traits I learned watching him be a successful (at many levels) and adored coach. Those core traits continue to guide me today.