ROI before architecture
The first question is never "what stack?" It is "what does this cost today, and what will it save?" If the math does not work, the project does not start.
About
Engineer, operator, and your technical co-pilot.
I'm Jason Lima — a freelance software engineer and fractional CTO. I help small teams replace manual work with software that pays for itself.
The short version
For six years I've built software inside a Fortune 100 financial company — systems used by millions of people, under the kind of compliance and reliability constraints that make you careful. I've also designed, built, and shipped my own products end to end, which teaches a different skill: deciding what not to build.
Freelancing lets me bring both to smaller teams. The engineering discipline of an enterprise, the speed and ownership of a founder, and a bias toward measurable outcomes instead of billable hours.
My background is Computer Science and Business Information Systems. That combination is the whole job: understand how the business actually makes money, then remove the friction between the people doing the work and the systems supporting them.
6+Years shipping software
20+Products and tools built
100%Fixed-scope engagements
∞Still learning
Experience
Where I've worked
Software Engineer
Fidelity Investments
Full-stack engineering on large-scale financial systems serving millions of users. Designing software infrastructure, leading feature delivery end to end, and contributing across the stack at one of the largest asset managers in the world.
Associate Software Engineer
Fidelity Investments
Promoted from intern to full-time engineer within six months. Ramped quickly on production codebases and began contributing to core platform work.
Software Engineer Intern
Fidelity Investments
Six-month internship building internal tooling and gaining hands-on experience with enterprise-scale software development practices.
Lead Quality Manager
CVS Health
Led quality and process operations at a major pharmacy retail location. Saw firsthand how much operational time disappears into manual tracking.
Quality and Process Manager
CVS Health
Managed store quality, compliance, and operational processes. Built systems for tracking and improving team performance — the first automation work.
Capabilities
Tools I reach for
Chosen for the problem, not the résumé. These are the defaults I know deeply — not the only things I can use.
Languages
- TypeScript
- JavaScript
- Go
- Python
- SQL
Frontend
- React
- Next.js
- React Native
- Expo
- Accessibility
Backend
- Node.js
- REST & GraphQL
- WebSockets
- Auth
- Queues
Data & AI
- PostgreSQL
- Redis
- Prisma
- LLM APIs
- Vector search
Infrastructure
- Docker
- AWS
- GitHub Actions
- Vercel
- Monitoring
How I work
Three rules I don't break
Small scope, shipped
I would rather ship the one workflow that saves ten hours a week than spend six months on a platform nobody uses. Value compounds after launch, not after planning.
You own the outcome
Code, infrastructure, documentation, and accounts stay yours. I am a temporary accelerator, not a permanent dependency.
Have a process that eats your week?
Tell me about it. The first conversation is free, and you'll leave with a straight answer.