About Me
Since beginning my journey as a software engineer over 20 years ago, I’ve built scalable solutions across AI, fintech, and health tech. I’ve led engineering for high-growth platforms, founded a successful enterprise-grade product, and consistently bridged the gap between complex architecture and business growth. I’m a technical leader who values mentorship, thrives on engineering precision, and is perpetually focused on shipping great craft at scale.
20+
Years of Experience
80+
Project Completed
100+
Successful Mentorships
Software Architect
I design scalable, maintainable systems that support real-world applications and long-term growth.
AI Engineer
I build and integrate AI-driven solutions to automate workflows and enhance product capabilities.
Entrepreneur
I build and launch digital products, combining engineering with product thinking and business strategy.
Mentor
I help developers grow their skills, improve their thinking, and advance their careers with practical, real-world guidance.
Got a project?
Let’s build something great together.
Services
A focused set of services to help you design, build, and scale reliable software.
MVP & Startup App Development
Launch in 3-4 months, not 12-18. Lean MVP development for startups seeking funding and product-market fit validation. Built SWEAT from MVP to $400M exit - we know what investors scrutinize and users actually want.
- MVP Strategy & Scope Validation
- Rapid Prototyping & User Testing
- Investor-Ready Technical Architecture
- 3-4 Month Launch Timelines
- Post-Launch Iteration & Scaling Support
AI-Powered App Development
AI is not the answer to everything. But when you build with experts who know what to build and why, AI becomes a force multiplier. We develop AI-powered applications with judgment - combining product expertise since 2013, proven engineering standards, and relentless focus on business outcomes.
- AI Strategy & Discovery
- AI-Powered Mobile & Web Applications
- AI Integration into Existing Products
- Custom Model Development & Fine-Tuning
- AI App Scaling & Production Optimization
Cross-Platform App Development
Expert Flutter app development for iOS and Android from a single codebase. 40% cost savings with simultaneous platform launch. Native performance without compromise.
- Single codebase for iOS and Android
- 40% cost savings vs separate native development
- Native performance and platform-specific features
- Faster time to market - simultaneous platform launch
Mentorship
Grow as an engineer with practical, real-world guidance. I work with developers and teams to improve how they think, build, and make technical decisions.
- 1:1 mentorship and ongoing support
- System design and architecture guidance
- Code reviews and technical feedback
- Real-world problem solving and best practices
Writings
Sharing thoughts, lessons, ideas, and practical insights from building and scaling software.
Speaking Skills
•
2025-03-22
5 Tips for Speaking a New Language with Confidence
Speaking anxiety is real — but it doesn't have to hold you back. These five strategies will help you open your mouth and keep the conversation going.
Tutoring
•
2025-05-18
Why 1-on-1 Tutoring Beats Every Other Learning Method
Language Tips
•
2025-03-15
Getting Started with Language Learning: A Beginner's Guide
Tutoring
•
2025-04-01
How to Find the Perfect Language Tutor for Your Goals
Trusted by Teams
Collaborating with companies to build and scale impactful products.
Undetectable AI
TruthScan
Barcode Essentials
Sonder
Dash
Sandstone Technology
Testimonials
What colleagues and clients say about working with me:
Mark Apiado
Full Stack Javascript Developer
“Jake is one of the most humble people you'll meet, which is rare for someone with his level of expertise. He's a true full-stack architect and he communicates in a way that makes complex things easy to understand. Beyond the technical skills, he's someone I'm glad to call a friend. If you get the chance to work with Jake, take it.
Benjamin Miller
COO at TruthScan
“How do I even talk about a guy as strong as Jake? He's the best backend engineer I've ever known. He has great people skills. He's works his butt off. He's really kind. He's taken on a leadership role with the entire team...
Grant Lingel
Former CGO at Undetectable AI
“Jake is the professional you always hope to find but rarely, if ever, have the luck to do so. Working with Jake was such a positive and lucky experience for me. Not only is he insanely good at his job, Jake is so reliable that I never even thought once to follow up with him about anything because I just knew that it would be delivered when needed and that the execution would be flawless. Even if I dropped something in Slack at an obnoxious hour because I didn't want to forget, and I clearly said that this isn't urgent, he would get on it. But the thing that makes Jake such a rare find is that he goes so far beyond the scope of what he is there for and always delivers far more than what was expected. Finding someone who is proactive and seeking additional value to add is not common. Most people who are proactive, and I group myself here a lot of the time as well, try to deliver more value but end up scatter-braining their way into adding things or bringing up ideas that are all over the map. Not Jake. Pure value, each and every time. Jake, it was a pleasure working with you and learning from you. It's a shame there aren't more Jakes out there.
Wamiq Raza
Generative AI Engineer
“Jake has an exceptional talent for designing scalable back-end solutions that handle millions of users with ease. From load balancers to AI-driven components, his approach blends technical excellence with forward-thinking architecture. A true asset to any high-growth team.
Arthur A.
Founder @ Artech Digital
“Jake is a very reliable software engineer and a great technical leader. My experience with Jake has been nothing but wonderful. Our projects have progressed a lot and the last month has been very transformative. I can predict achieving further milestones in the months ahead. Jake is not just a great developer but a partner in success. Five stars!
Dominique Monty
Customer Success and Engineering Leadership
“Jake was a great contributor to the mobile app team during his 5 years at Sandstone. During that time, I have see Jake progress from being a mobile app developer to taking ownership of some of the key components on the server side, stepping up to the role of technical lead and also scrum master. Jake has a lot of talent and skills and a great attitude towards work and this team.
Ajit Kondal
“A seasoned technologist and a thought leader in mobile application development. I had the pleasure of working with Kriztian Jake Sta. Teresa when he accelerated the development of New Payments Platform (NPP) capabilities for the BankFast Mobile App. NPP was an Australian banking industry initiative with an extremely firm deadline. Taking complete ownership of the initiative, Jake sought his deep technical expertise, problem solving skills and an extraordinary can-do attitude to deliver the project on time and budget, despite limited resources present in the team. Jake adopted a pragmatic approach at overcoming impediments and vowed everyone with his collaboration with designers. Our Client appreciated the quick turnaround, quality of the end-product and end-user experience. Jake has consistently helped shape the native experience of BankFast Mobile App.
Paul McKenzie
Principal Product Manager at Renewtrak
“I worked with Jake at Sandstone Technology as part of the Mobile Banking App team for the past 2 years. Jake is a talented Mobile App developer, strong in iOS and Android as well as hybrid app development. He is hard working and dependable, quite willing to go the extra mile when needed. As a senior member of the team, other developers often looked to him for advice about how to best implement new features. Jake contributed strongly in Agile backlog grooming and planning meetings often raising very important technical considerations. If you need a strong performer on your team I’d highly recommend Jake!
Franklin Aguinaldo III
Sr. Enterprise Solutions Architect at Amazon Web Services (AWS)
“Kriztian is a very detail oriented, advanced programming skills beyond his age and experience. He shows interests in new things technologies and keep himself updated. He carries an attribute of a life long learner. Always humble and delivers on-time and exceeds expectation. He is a joy to work with.
Joel Dobbins
Senior Developer / Designer
“Jake is a top notch developer and played a key role in creating the Mobile App. He is a true team player and was an absolute pleasure to work with. I'd recommend Jake to anyone for his extensive knowledge and versatility with working across multiple platforms and languages.
Shmulik (Sam) Kachlon
CTO & Co-founder @ Smarter City Solutions
“I had the pleasure to work with Jake at Sandstone Technology.Simple put, if you want to put a proof of concept together in no time, Jake is your man. Jake has an amazing positive and can-do attitude in addition to his great technical skills.I'll recommend Jake as a great developer to any company.
Nitin Sethi
Head of Product | Startups | Investor
““Jake is a great asset to any team because of his extensive breadth of knowledge( server side , client side, mobile apis). He was able to work on any given task and guide his more junior teammates where necessary. His can-do attitude and lively nature kept the team positive and motivated even in the tough times. I expect great things from Jake and I know he will deliver.
Available for new projects
Have a project in mind?
I’m always open to collaborating on meaningful products and solving complex problems together.
20+ years building scalable, user-centric products across AI, fintech, health tech, and enterprise.
© 2026 Jake Sta Teresa. All rights reserved.