I build, ship and scale products, from the first commit to 10M+ transactions a day.
I'm a senior full-stack engineer. I've built 0→1 products across fintech, hiring, healthcare, AI and e-signatures, including payment systems handling 10M+ transactions a day at 500+ requests a second, and I've led the teams building them from architecture to launch.
Right now I'm building AI agents for healthcare at RapidClaims.
Experience
- RapidClaimsNov 2025–now
AI revenue cycle management for healthcare
SDE 3
Building the full-stack systems behind RapidClaims' autonomous AI agents for medical coding, risk adjustment and denial management.
- SignWithMar–Nov 2025
Pay-per-document e-signatures
Chief Technology Officer
Led technology, architecture and product engineering for the platform.
- TopHire2023–24
Tech jobs for the top 2% of engineers
Senior Software Engineer
Owned full-stack development of several features, and deployed and managed the LLMs and servers behind them.
- Credgenics2021–23
AI-driven debt collections
Tech Lead
Owned and scaled the payments product and led the payments team.
Software Engineer (later promoted to Tech Lead)
Built the payments product from scratch and set up its core building blocks.
- Credicxo2019–21
Lending to small businesses
Lead Backend Engineer
Owned and scaled several products, led the backend team and owned the product roadmap.
Software Engineer (later promoted to Lead Backend Engineer)
Built several products from scratch, wrote the migration scripts and configured the servers.
Selected projects
See all 19FairShare
2026DetailsOpen-source Splitwise alternative
Split bills with friends and track your own spending in one app. Add expenses by voice with Siri, settle up over UPI, self-host with Docker.
Creator · Next.js · TypeScript · Tailwind CSS
SignWith.co
2025DetailsGet e-signatures done faster
SignWith is a platform that helps you get e-signatures done faster by reducing complexity and cost.
CTO · Next.js · Tailwind CSS · TypeScript
Kimaru.ai
2024DetailsFaster time-to-decision with Agentic AI
Kimaru.ai helps managers facing challenges with retail supply chain to reduce time-to-decision
Head of Engineering & Product development · Next.js · Tailwind CSS · TypeScript
MindFry.in
2024DetailsInternal Dashboard for Operations
A mental health startup, dedicated to supporting faced by people in their 20s.
Full Stack Developer · Next.js · Tailwind CSS · TypeScript
What people say
“Kartik Gautam is one of the most capable Tech Leads I’ve had the pleasure of working with.”
Evan BurkoskyCo-founder and CEO, kimaru.aiKartik Gautam is one of the most capable Tech Leads I’ve had the pleasure of working with. As our Project Lead and Dev Lead at kimaru.ai, he took full ownership of our MVP development, demonstrating expertise in full-stack development, AI, and cloud infrastructure across AWS, GCP, and Azure. His in-depth knowledge of Python, Django, Jinja, C++, JavaScript, and software architecture allowed him to build a robust, scalable platform while proactively solving complex challenges. Kartik consistently went above and beyond expectations, self-directing and ensuring smooth collaboration across the team. His ability to diagnose intricate technical issues in minutes is rare, and his business mindset, design sensibilities, and leadership skills make him a standout developer. For any company seeking a fractional Project Lead, Lead Developer, or Tech Lead who brings technical excellence, strategic thinking, and a proactive problem-solving approach, I highly recommend Kartik.
“If you need someone who can turn messy ideas into real, working solutions, Kartik’s your guy.”
Aditi MishraCo-founder, MindFryI started Mindfry to help people find the right therapist, but we were buried in manual work. I reached out to Kartik who helped us in structuring the approach, figuring out what we want in the MVP and what we can keep for later iteration. I gave him some rough ideas, and he built a sleek dashboard that helps us manage hundreds of therapy sessions every month—effortlessly. Matching clients, managing schedules, tracking performance—it’s all in one place, and my team picked it up in no time. If you need someone who can turn messy ideas into real, working solutions, Kartik’s your guy.
“Out of the hundreds of developers I’ve worked with over the past 2 decades, only 4 of them have the engineering prowess, business mindset, and design sensibilities. Yes, Kartik is one of them.”
JoeFounder, Musubi TechOut of the hundreds of developers I’ve worked with over the past 2 decades, only 4 of them have the engineering prowess, business mindset, and design sensibilities. Yes, Kartik is one of them. But it’s more than finding a unicorn developer who could serve as an incredibly capable cofounder of a company, he is joy to work with. His work ethic, organization skills, and personality made our engagement together truly rewarding and if another opportunity to work with him gets presented, I will jump on it in a heartbeat.
“Last month, he helped me spot a Redis memory leak in 10 minutes that I'd been stuck on for days.”
SarthakEngineer, PayPalAs an engineer, I've worked with many developers, but Kartik stands out. He's been my tech lifeline for 2 years now - the person I ping when I'm stuck with anything from system design to tricky bugs. What I love is how he makes complex problems simple. Last month, he helped me spot a Redis memory leak in 10 minutes that I'd been stuck on for days.Always available for help and ready to explain the 'why' behind his fixes.
Blogs
All blogsSay hello
Always happy to talk engineering, products, or a good problem.