About | Software Design and Development Agency | Exygy

About Exygy

Digital Products and Digital Strategies that Solve Challenging Social Problems

Design + Tech + Change

We use a human-centered approach to understand needs and test solutions. We develop innovative products using a rapid iterative process. A Certified B-Corp and a registered California Benefit Corporation, we seek work that creates progressive social change.

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The Team

Zach Berke

Founder & Managing Partner

Moving back to California in 2005, Zach founded Exygy as a freelance designer and engineer. Today, Zach gets excited about scalable purpose-driven projects whose impact is best served by Exygy’s unique blend of strategy, human-centered design, and agile software engineering.

Roshen Sethna


Roshen is a MacGyver of sorts: operations guru, strategist, and entrepreneur all wrapped up in one. She comes to Exygy from the social enterprise world where she led resource management for a social venture incubator, consulted on sustainable consumer packaging for a Fortune 500 company, and worked on affordable real estate and urban development. Roshen is a partner at Exygy leading product management in the civic sector and scaling our people operations to support effective social impact technology projects. Roshen holds a BA from Duke University where she was a Baldwin Scholar.

Eric Lam


Eric is a Partner  and a Product Manager with a wealth of experience in leading agile software development programs for web and mobile platforms.  He has worked with clients and teams across the US, Hong Kong, India, Philippines and Ireland.  Prior to technology consulting, Eric begun his own non profit organization where he worked with developing communities in El Salvador to organize sustainable initiatives, which included constructing homes, developing a community center, and establishing a day care. As a Southern California native, Eric loves anything outdoors, from rock climbing to carpentry, as long as the sun is out.

Pierre Hunault

Senior Applications Engineer

Pierre’s boundless expertise in Rails, Django, PHP, Android, and Objective-C make for an impressive resume. One of the language achievements he is proudest of is learning English after moving to the U.S. from his native country, France. Pierre earned his Masters in Computer Science from Supinfo France and the Domincan University of California. A co-founder of PunkPixel, Pierre delights in the ability to push creative boundaries in technical realms. When not immersed in an absorbing tech project, Pierre heads to the water where he loves to scuba dive and surf.

Wendy Fong

Lead Designer

Wendy believes in the power of design to change the world for good. A designer and educator with 10+ years of experience, she has worked on projects internationally and domestically. In Port Au Prince, Haiti, she collaborated on a call center which connected over 2000 women to legal and medical services. A former Code for America Fellow, she built a legislation app that increased civic engagement for the 450,000 residents of Mesa, Arizona. Wendy has led 1500+ students towards design excellence. As the Lead Designer at Exygy, Wendy shapes the design strategy and vision for the company.


Jesse James

Lead Designer

Jesse earned his MFA in Visual Art from the University of California San Diego and his professional history has included fine art, machining, furniture design and front end programming. He wants to learn your language and identify key user interactions. From block model to visual design, your application has personality, and he draws that out in order to enhance the overall experience. For the past five years, he has served as creative drive and Co-founder of Mister Machine. You should know, that the trunk of his car is always packed with camping gear, ready at a moments notice to jump on HWY 1 for a trip to Big Sur.

Michael Enslow

Director of Delivery

Michael is a Product Manager & Software Engineer with extensive experience designing, developing, and deploying web applications. Before joining the team at Exygy, Michael was the Principal Developer and Co-founder of Mister Machine, a front end development and prototyping shop. Michael has led development for universities, scientific institutions, and large media organizations. He currently focuses on ambitious front end development for responsive prototypes and pattern libraries that integrate with back end APIs. Michael has a passion for urban gardening and believes we can save the world one tomato, beet, and head of lettuce at a time.

Christine Dolendo

Software Engineer

Christine graduated magna cum laude from American University. She has made it her lifelong mission to leverage technology to make our world the truest expression of compassion, connection and freedom. Christine engineered the product for Sparo.com to seamlessly marry commerce and charity. She is the co-inventor of four tech patents including “Automated Online Allocation of Donations,” & “Automated Online Calendar-Based Donations.” She was the founding engineer of LighterCulture.com, an all-female led tech startup, which makes sustainable, cruelty-free eating convenient and affordable. She is also a coach at DevBootcamp.

Mari Toledo

Senior Product Designer

Mari is a product designer who enjoys creating clean and elegant interfaces. Mari is responsible for some of our favorite visual design work including our own exygy.com website. Mari’s goal is to design solutions that result in positive impact on society. Before coming to San Francisco, Mari worked as a Visual Designer and Art Director with many Brazilian fashion firms. Mari has a Bachelor’s Degree in Digital Design and Interactive Media from Universidade Anhembi Morumbi in Brazil.

Ana Bel Campos

Ana Bel recently moved to the Bay Area from Rio de Janeiro, Brazil where she began her work in product management. She has worked with agile development for 7 years, and as a product owner she has helped to create a diverse range of digital products. Her biggest concern is always delivering the best experience possible for the user, and her dream is to be able to change people’s lives through her products. Her favorite word is empathy. She uses Keynote for everything, and is known for building “Wow!” presentations. As a good Brazilian, she loves ‘feijoada’, soccer and samba.

Rachael Estess

Chief of Staff

Rachael is the Chief of Staff at Exygy, and has worked in the social entrepreneurship sector for 8 years. She works leading people operations and advising the leadership team, to ensure organizational effectiveness and team happiness.  While working on Ashoka’s Talent team, she automated 40% of her job and led partnerships to provide professional development opportunities to the staff. She was also a fellow with Motiis Innovation Lab in Mombasa, Kenya conducting market research and testing scalable business models. Rachael is obsessed with scuba diving and dreams of one day swimming with a whaleshark.

Catherine Callaghan

Software Engineer

Catherine is a full stack web developer who believes in using technology to empower and care for people. After five years of building and managing web applications as a solo globetrotting freelancer, she decided to try a crazy experiment where she stays in one place and hangs around these interesting creatures called “coworkers” a lot. They’re pretty ok, it turns out. She is fascinated/horrified by AI and thinks that if the robots are coming we should try to build them to be as chill as possible. Catherine holds a BA in Computer Science and Cognitive Science from UC Berkeley.

Alice Yan

Product Designer

Alice is a product designer with a multidisciplinary background in human-centered design and information technology. She landed at Exygy straight out of university to pursue her life’s dream of using design thinking and collaboration to influence change and create effective yet efficient solutions. Her passion is empowering youth with the knowledge of an edible education. When Alice isn’t designing, you can find her working on illustrations, dreaming of noodles, and exploring the world by bicycle. Alice holds a BS in Informatics from the University of Washington, Seattle with a focus in Human-Computer Interaction.

Aashna Shah

Business Growth Strategist

Aashna joins Exygy from the world of entrepreneurship and startups. During college, she founded Gleam, a health-tech startup that is on a mission to improve accessibility to quality behavioral health care in underserved communities. Aashna drives business development at Exygy, helping develop partnerships with high impact organizations. Aashna graduated Magna Cum Laude from the Macaulay Honors College at the City College of New York, CUNY with a B.S. in computer science and a minor in psychology. She also has given a TEDx talk, ‘Life Without a License to Live.’