Jaryl Sim
Founder, CTO at Tinkerbox Studios Pte Ltd
Singapore
Summary
👤
Senior🎓
Top SchoolJaryl Sim is a founder and seasoned CTO with 11+ years bringing products from concept to market, primarily through his work at Tinkerbox and multiple early-stage ventures across Singapore. He blends hands-on engineering—comfortable as architect or coder—with strong product instincts, emphasizing TDD, CI/CD, and data-informed design to align stakeholders and reduce delivery risk. His experience spans e-commerce marketplaces, multi-tenant platforms, travel, government services, and retail POS systems where he applied DDD, CQRS and event-sourcing to solve offline and transactional challenges. Known as an indie hacker, he balances craftsmanship and operational pragmatism, having grown teams and engineering culture while still rolling up his sleeves on performance and scalability problems. An effective communicator and mentor, he also teaches and advises startups, bringing practical lessons from refactoring legacy Rails systems to launching UX-driven product iterations.
11 years of coding experience
5 years of employment as a software developer
St. Gabriel's Secondary SchoolSt. Michael's Primary SchoolBachelor of Science (BSc) Information Systems, Bachelor of Science (BSc) Information Systems at Singapore Management UniversityDiploma Information Technology, Diploma Information Technology at Nanyang Polytechnic
Stackoverflow
2,571reputation
154kreached
35answers
21questions
Github Skills (100)
hybrid10
javascript10
browser10
single-page10
compiler10
static-site-generator10
typescript10
nextjs10
react10
turbo9
react-framework9
google-analytics9
storybook9
vercel9
logical-replication9
Programming languages (3)
Github contributions (5)
tinkerbox/mailyard-spa
Jul 2019 - Mar 2025
Contributions:51 PRs, 183 pushes, 91 branches in 5 years 8 months
expressjsjavascriptantdgraphqlreactjs
jaryl/rss-together
Feb 2022 - Aug 2022
Contributions:222 commits, 4 PRs, 80 pushes in 5 months
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