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It is with a mixture of heartache and optimism that I announce today my (long planned) retirement from commercial software development, and my employment at Nubank. It’s been thrilling to see Clojure and Datomic successfully applied at scale. I look forward to continuing to lead ongoing work maintaining and enhancing Clojure with Alex, Stu, Fogus and many others, as an independent developer once again. We have many useful things planned for 1.12 and beyond. The community remains friendly, mature and productive, and is taking Clojure into many interesting new domains. I want to highlight and thank Nubank for their ongoing sponsorship of Alex, Fogus and the core team, as well as the Clojure community at large. Stu will continue to lead the development of Datomic at Nubank, where the Datomic team grows and thrives. I’m particularly excited to see where the new free availability of Datomic will lead. My time with Cognitect remains the highlight of my career. I have learned from absolutely everyone on our team, and am forever grateful to all for our interactions. There are too many people to thank here, but I must extend my sincerest appreciation and love to Stu and Justin for (repeatedly) taking a risk on me and my ideas, and for being the best of partners and friends, at all times fully embodying the notion of integrity. And of course to Alex Miller - who possesses in abundance many skills I lack, and without whose indomitable spirit, positivity and friendship Clojure would

6 April 2026 at 08:58 pm
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(next Rich)

Rich Hickey, the creator of Clojure and a key figure in the development of Datomic, has announced his retirement from commercial software development and his new employment at Nubank. This decision, long planned, marks a significant chapter in Hickey's career, as he transitions from a full-time commercial software developer to an independent developer while continuing to contribute to Clojure and Datomic.

Hickey's announcement is a mix of heartache and optimism. He expresses pride in seeing Clojure and Datomic successfully applied at scale, and he looks forward to leading ongoing work on maintaining and enhancing Clojure with a team that includes Alex Miller, Stuart Halloway (Stu), and Fogus, among others. The future of Clojure looks bright, with many useful features planned for version 1.12 and beyond. Hickey highlights the vibrant and productive Clojure community, which is taking the language into new and interesting domains.

Nubank, a financial technology company, has played a crucial role in supporting the development of Clojure and Datomic. Hickey thanks Nubank for their ongoing sponsorship of Alex, Stu, and the core team, as well as the Clojure community at large. Stu will continue to lead the development of Datomic at Nubank, where the Datomic team is growing and thriving. Hickey is particularly excited about the new free availability of Datomic, which he believes will open up new opportunities and possibilities.

Hickey's time with Cognitect, the company he co-founded with Stu and Justin, has been the highlight of his career. He expresses gratitude to everyone on the team for the learning experiences and interactions they shared. While there are too many people to thank individually, Hickey extends his sincerest appreciation and love to Stu and Justin for repeatedly taking risks on his ideas and for being partners and friends who embody integrity. He also acknowledges Alex Miller, whose spirit, positivity, and friendship have been instrumental in shaping Clojure into what it has become.

Hickey has made many friends through his work with Clojure and Cognitect, and he hopes to nurture those friendships in the future. Retirement brings him the freedom and independence he had when he first started developing Clojure. As he steps away from commercial software development, Hickey remains committed to the continued growth and success of Clojure and Datomic.

This transition represents a new chapter for Hickey, allowing him to focus on his passion for programming while maintaining his influence on the Clojure ecosystem. With Nubank's support and the vibrant Clojure community, the future of these projects looks promising. Hickey's legacy as a pioneer in functional programming and his contributions to the open-source world will continue to inspire developers around the globe.

Source: Clojure News
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