Founding engineers for ambitious founders
Whether you're VC-backed and racing your runway, or modernizing a traditional business with AI, we ship production-grade software at startup speed.
Services
Engineering excellence,
delivered
Our team operates like a founding engineering team: opinionated, fast, and deeply invested in the outcome. We don't just write code, we architect systems, challenge assumptions, and ship relentlessly.
Full-stack Engineering
Ship your MVP in 60 days, scale to 1M users without rewriting it
Product Design
Research-driven design that converts. We craft interfaces that feel intuitive and look exceptional.
Projects
Genuine effort, meaningful change
more projects
The ultimate convenience of on-the-go mobile device charging with chargeFUZE.
Agentic AI for data science
Triangle.AI is developing a platform to revolutionize how patients find and engage with clinical trials.
The figures
Trusted by high-growth teams
ResiQuant raises $4M to revolutionise property insurance with AI-powered insights.
"The Spartan team is amazing! We had a very challenging ask for them in terms of technical rigor with limited available time, and they delivered. Their process is clean, well documented, and visible, so I always know what the team is doing and how. I really enjoy working with our team to the point that I feel like they are also members of our company."
- Francisco Galvis CTO & CO-FOUNDER @ resiquant
PhD Researcher, Stanford
Paratus Health raises $2.3M Seed Round to Turn Wait Times into Proactive Patient Care.
"Using Spartan helped us double our engineering velocity right after Y Combinator. As a lean team moving fast, it gave us the talent and support we needed to scale without compromising on quality. It's like adding an excellent full-time employee in a matter of days."
- Pablo Bermudez-Canete Founder & CEO @ Paratus Health
BS Stanford
Onlook has raised a total funding of $500K over 1 round.
"We've been working with Chan and Spartan for a year. He came highly recommended by old colleagues. Chan and the team have been great and very communicative. He was very quick to jump on when we had issues and was generous with his time and resources in helping us. We needed to experiment with a new feature and he assigned extra engineers and QA to help us solve it. We've recommended Spartan and Chan to other YC founders who've found great success working with his team as well."
- Kiet Ho Co-founder & CTO @ Onlook
Rain raises $24.5M in round led by Norwest Venture Partners
“I highly recommend partnering with Spartan for your engineering needs! Their team, led by Chan, excels at finding the right talent for every stage of your project. They have strong processes that make working with international teams seamless. Definitely worth it!”
- Charles Naut Founder & CTO @ Rain
Former project manager @ Microsoft, BS Stanford
sFox raised a total of $22.8M over 4 funding rounds: 3 Seed and 1 Early-Stage rounds. 
Introduces breakthrough multi-signature wallet with $4.1M seed funding.
"Working with the Spartan team to build our product has been an incredible experience. Their expertise, dedication, and technical skills have exceeded our expectations. They are able to take loosely defined requirements and do the necessary market research to design a fantastic system that addresses all the main requirements exceeding even our expectations. I am also impressed by their speed and quality. They have been a fantastic partner, and we can't recommend them more."
- George Melika Founder @ SFOX
Co-Founder @ Volta
Secured $7M to Power Pricing in the AI Era
"Spartan has been an incredible partner in our journey. Their team's expertise and dedication have significantly accelerated our development process, allowing us to bring our vision to life faster than we could have imagined. We're grateful for their support and look forward to continuing this successful collaboration."
- Spyri Karasavva Founder & CEO @ dealops
Former Product Finance & Strategy @ Stripe
Raised $4M to democratize scientific computing by making simulations, data analysis, model training.
"The Spartan team is the best off-shore team I've worked with. Each developer is top notch, can cover for one another, is curious and responsive. Our first task was for them to perform a difficult migration, which they executed without any issues. The firm's CEO, Chan, is a good sounding board and very fair. Camber looks forward to a close, fruitful partnership with Spartan into the future."
- Aristotle Socrates Founder & CEO @ Camber Cloud
former CTO @ pistil data
Testimonials
Don't trust our word
"Our company faced challenges with an established codebase. The Spartan engineers impressed me with their organized processes and enthusiasm. Their tailored onboarding eased my concerns about remote resources, and I'm proud to have them on our team."
Jane Jeong
- Co-founder & CTO @ REVIVA
- former software engineer @ zoom & aws
"The Spartan team is fantastic! They tackled a tough technical challenge under tight deadlines and delivered impressively. Their process is clear and well-documented, keeping me informed about their work. I truly enjoy collaborating with them, feeling like they're part of our company."
Francisco Galvis
- CTO & CO-FOUNDER @ resiquant
- PhD Researcher, Stanford
"I highly recommend partnering with Spartan for your engineering needs! Their team, led by Chan, excels at finding the right talent for every stage of your project. They have strong processes that make working with international teams seamless. Definitely worth it!"
Vera Kutsenko
- FOUNDER & CEO @ ATRIX AI
- former co-founder & cto, beehyve
- FORMER SOFTWARE ENGINEER @ UBER & FACEBOOK
"I highly recommend partnering with Spartan for your engineering needs! Their team, led by Chan, excels at finding the right talent for every stage of your project. They have strong processes that make working with international teams seamless. Definitely worth it!"
Charles Naut
- Founder & CTO @ Rain
- FORMER project manager @ Microsoft
- BS Stanford
"Spartan stands out for startups and scale-ups exploring outsourcing. Their engineering team excels, offering more than just solutions - they're dedicated partners in your success."
Asa Downs
- principal software engineer @ heru
- FORMER sr. software engineer @ biolog & amazon studios
"Spartan stands out for startups and scale-ups exploring outsourcing. Their engineering team excels, offering more than just solutions - they're dedicated partners in your success."
Justin Balthrop
- Co-founder & CTO @ Triangle
- FORMER Co-founder @ Bird
"Spartan's engineers are truly phenomenal. Their focus on long-term value rather than just completing tasks has made a significant impact on our operations."
Travis Vander Zanden
- Chairman & FOUNDER @ BIRD
- former VP @ UBER
- FORMER COO @ LYFT
"My Spartan team goes above and beyond to keep me in the loop, with ample documentation, daily standups, and code reviews. With Spartan, it feels like my engineers are part of my team."
James Webb
- Founder & CTO @ Sidecar Data
- BS Stanford
"Chan and the Spartan team are hands down the best engineering team I've ever worked with. Their organization, thorough research, intuition, and work ethic are truly exceptional."
James Webb
- Founder & CEO @ regimen
- co-founder @ mad ruk
"After several disappointing experiences with dev agencies, I found Spartan. Initially skeptical, I quickly migrated my projects to them within a month. Their fast, high-quality software engineering is rare!"
Cody Zhang
- founder & angel investor @ cz
- former PRODUCT & ENGINEERING LEAD @ AGORA
"Spartan is one of the best firms I've worked with across multiple projects and companies. They ramp up quickly, consistently adding value."
Scott Rushfort
- cto @ pura
- FORMER CVO @ bird
"Using Spartan helped us double our engineering velocity right after Y Combinator. As a lean team moving fast, it gave us the talent and support we needed to scale without compromising on quality. It's like adding an excellent full-time employee in a matter of days."
Pablo Bermudez-Canete
- founder & CEO @ Paratus Health
- bs stanford
"Switching from in-house teams to Spartan for my Fintech startup was a game-changer. Their rapid, high-quality software engineering exceeded expectations."
Ryan Fujiu
- SVP Product & Design @ Super.com
- Former ceo @ liquidity financial
- FORMER head @ uber
"The Spartan team is the best off-shore team I've worked with. Each developer is skilled, supportive, and responsive. They handled a challenging migration flawlessly. CEO Chan is a fair sounding board. Camber looks forward to a strong partnership with Spartan ahead."
Aristotle Socrates
- Founder & CEO @ Camber Cloud
- former CTO @ pistil data
"In the fast-paced world of startups, the Spartan team is essential. They deliver high-quality code quickly, keeping us updated on their progress. They meet tight deadlines and adapt to changes effortlessly, working independently or with guidance as needed."
Serj Kazar
- CO-FOUNDER & CTO @ exia labs
- FORMER principal software engineer @ riot games
- FORMER Engineering Manager @ bird
"Our company faced challenges with an established codebase. The Spartan engineers impressed me with their organized processes and enthusiasm. Their tailored onboarding eased my concerns about remote resources, and I'm proud to have them on our team."
Jane Jeong
- Co-founder & CTO @ REVIVA
- former software engineer @ zoom & aws
"The Spartan team is fantastic! They tackled a tough technical challenge under tight deadlines and delivered impressively. Their process is clear and well-documented, keeping me informed about their work. I truly enjoy collaborating with them, feeling like they're part of our company."
Francisco Galvis
- CTO & CO-FOUNDER @ resiquant
- PhD Researcher, Stanford
"I highly recommend partnering with Spartan for your engineering needs! Their team, led by Chan, excels at finding the right talent for every stage of your project. They have strong processes that make working with international teams seamless. Definitely worth it!"
Vera Kutsenko
- FOUNDER & CEO @ ATRIX AI
- former co-founder & cto, beehyve
- FORMER SOFTWARE ENGINEER @ UBER & FACEBOOK
"I highly recommend partnering with Spartan for your engineering needs! Their team, led by Chan, excels at finding the right talent for every stage of your project. They have strong processes that make working with international teams seamless. Definitely worth it!"
Charles Naut
- Founder & CTO @ Rain
- FORMER project manager @ Microsoft
- BS Stanford
"Spartan stands out for startups and scale-ups exploring outsourcing. Their engineering team excels, offering more than just solutions - they're dedicated partners in your success."
Asa Downs
- principal software engineer @ heru
- FORMER sr. software engineer @ biolog & amazon studios
"Spartan stands out for startups and scale-ups exploring outsourcing. Their engineering team excels, offering more than just solutions - they're dedicated partners in your success."
Justin Balthrop
- Co-founder & CTO @ Triangle
- FORMER Co-founder @ Bird
"Spartan's engineers are truly phenomenal. Their focus on long-term value rather than just completing tasks has made a significant impact on our operations."
Travis Vander Zanden
- Chairman & FOUNDER @ BIRD
- former VP @ UBER
- FORMER COO @ LYFT
"My Spartan team goes above and beyond to keep me in the loop, with ample documentation, daily standups, and code reviews. With Spartan, it feels like my engineers are part of my team."
James Webb
- Founder & CTO @ Sidecar Data
- BS Stanford
"Chan and the Spartan team are hands down the best engineering team I've ever worked with. Their organization, thorough research, intuition, and work ethic are truly exceptional."
James Webb
- Founder & CEO @ regimen
- co-founder @ mad ruk
"After several disappointing experiences with dev agencies, I found Spartan. Initially skeptical, I quickly migrated my projects to them within a month. Their fast, high-quality software engineering is rare!"
Cody Zhang
- founder & angel investor @ cz
- former PRODUCT & ENGINEERING LEAD @ AGORA
"Spartan is one of the best firms I've worked with across multiple projects and companies. They ramp up quickly, consistently adding value."
Scott Rushfort
- cto @ pura
- FORMER CVO @ bird
"Using Spartan helped us double our engineering velocity right after Y Combinator. As a lean team moving fast, it gave us the talent and support we needed to scale without compromising on quality. It's like adding an excellent full-time employee in a matter of days."
Pablo Bermudez-Canete
- founder & CEO @ Paratus Health
- bs stanford
"Switching from in-house teams to Spartan for my Fintech startup was a game-changer. Their rapid, high-quality software engineering exceeded expectations."
Ryan Fujiu
- SVP Product & Design @ Super.com
- Former ceo @ liquidity financial
- FORMER head @ uber
"The Spartan team is the best off-shore team I've worked with. Each developer is skilled, supportive, and responsive. They handled a challenging migration flawlessly. CEO Chan is a fair sounding board. Camber looks forward to a strong partnership with Spartan ahead."
Aristotle Socrates
- Founder & CEO @ Camber Cloud
- former CTO @ pistil data
"In the fast-paced world of startups, the Spartan team is essential. They deliver high-quality code quickly, keeping us updated on their progress. They meet tight deadlines and adapt to changes effortlessly, working independently or with guidance as needed."
Serj Kazar
- CO-FOUNDER & CTO @ exia labs
- FORMER principal software engineer @ riot games
- FORMER Engineering Manager @ bird
Ready to build
something exceptional?
We partner with ambitious founders who want engineering excellence, not just more developers.
