YOCF — Your Only Co-Founder | NYC Software Agency

NYC software agency turning ideas intorevenue-ready platforms.

YOCF (Your Only Co-Founder) is a New York City software team of top-rated engineers building the digital engines that drive businesses forward. We deliver custom software, complex web platforms, and AI-powered experiences that convert your business logic into clean, efficient, market-ready code.

You're in good company

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About Us

Hi, we're YOCF

Your Only Co-Founder—an NYC software agency transforming ideas into scalable, full-stack platforms.

We act as your embedded technical partner with a senior, unified team of seven ex-top-rated Upwork freelancers—capable of building anything from concept to launch, fast, reliable, and ready for real users.

What we build

  • • AI/ML products, agents, and automation
  • • Trading systems, backtesting, and bots
  • • Blockchain & Bittensor integrations
  • • SaaS, eCommerce, and fintech platforms
  • • High-uptime VPS and cloud-native services

How we ship

  • • Production-grade DevOps (CI/CD, IaC, observability)
  • • Performance tuning and scale-readiness
  • • Security-first architecture and reviews
  • • Data pipelines and analytics for decisioning
  • • Tight product-engineering collaboration

Full stack Development

From your wireframes to a powerful, live platform. We specialize in building robust, scalable website.

Expert Team

Skilled developers with expertise in modern tech stacks, AI integration, and scalable architecture.

AI-Powered Solutions

Leveraging machine learning and intelligent automation to build smarter, more efficient products.

Our Services

What We Offer

From concept to deployment, our NYC software agency delivers end-to-end solutions that scale with your vision.

Our comprehensive suite of services combines cutting-edge technology with proven methodologies to accelerate your digital transformation. We ship AI products, trading and backtesting platforms, blockchain/Bittensor components, SaaS, eCommerce, and finance experiences—backed by DevOps, observability, and performance tuning.

Full Stack Development

Complete product development from concept to deployment, engineered for scalability and market readiness.

Modern frameworks • Cloud infrastructure • Rapid iteration cycles
Speed up using AI powered

Don't waste time on simple code. When necessary, we leverage AI coding tools to save development time.

Cursor, ChatGPT
Scalable Infrastructure

Backend architecture designed to handle exponential user growth while maintaining performance and reliability.

Auto-scaling systems • Load balancing • Database optimization
Focus on Quality Assurance

Don't ship with hidden bugs. Every line of code undergoes rigorous function testing before launch to ensure flawless performance.

Test code bug -> no errors
Our Work

Portfolio Showcase

Explore our recent projects and see how we've helped businesses transform their ideas into successful digital products.

Each project represents our commitment to innovation, quality, and delivering exceptional user experiences.

Client Reviews

Here's what our clients say

Hear the success stories of the businesses we've helped thrive with innovative solutions.

From startups to enterprise companies, our clients trust us to deliver exceptional results.

"YOCF is extremely proactive and comprehensive in assessing project requirements. This NYC software agency's communication and support throughout the entire development process is exceptional. 100% recommend their services."

VG

Victor Gamra

CEO at ComplianceOn

"YOCF delivered fast, clean, and precise execution on our React and Django project. They understood our compliance requirements immediately and handled the technical complexity without handholding. We're hiring them again immediately."

AD

Amy DeGregorio

CTO at FortifyData

"Working with YOCF has been fantastic. They worked great with our team and filled in our expertise gaps without needing to take the project over. They're experts who know how to work as part of a team - not all experts are that way!"

DM

David Martinez

Engineering Manager at Amazon

FAQ

Frequently Asked Questions

Everything you need to know about building with YOCF, your NYC software agency partner.

Have a question that's not covered here? Feel free to reach out to us directly.

We are your on-demand, full stack development team. We integrate directly with your workflow to build and scale your product, acting as a seamless extension of your company. You get a complete technical solution for a simple monthly subscription.

We have our own flagship product, Plurafi.ai—a robust, in-house platform. This proven infrastructure and our full-stack expertise are the foundation we use to engineer advanced AI, trading, and automation solutions for our clients.

A basic website typically takes 2-4 weeks, while a complex custom web application can take 3-6 months. The timeline depends entirely on your project's specific features and complexity. We provide a detailed timeline after discussing your unique requirements.

Yes, we offer comprehensive post-launch support including bug fixes, performance optimization, feature updates, and scaling assistance. We provide different support packages ranging from basic maintenance to full ongoing development partnerships.

Our service includes end-to-end development: initial strategy, UI/UX design, full-stack coding, and rigorous testing. We handle everything to transform your idea into a live, functional product. Ongoing support and iteration are also available after launch.

We implement robust testing frameworks, use proven AI models and APIs, implement fallback mechanisms, and conduct thorough validation with real data. We also provide monitoring and alerting systems to track AI performance and continuously improve accuracy over time.

We primarily work on a fixed-price model for well-defined projects, so you know the exact cost upfront, hourly rates for ongoing development. For evolving ideas, we offer dedicated team pricing, which gives you flexibility and a full-stack team on demand. We'll recommend the best model for your project's specific needs and goals.

We work with both! We have extensive experience with startups (from pre-seed to Series A) and also serve established companies building new products. We understand the unique challenges of each stage and adapt our approach accordingly.

We're Your Only Co-Founder—a senior-only NYC software agency that plugs directly into your workflow. You work with experienced full-stack engineers from day one, so delivery is faster, quality is higher, and every release is production-ready.

AI/ML: Python, PyTorch, TensorFlow, LangChain, OpenAI/Anthropic APIs, RAG, vector DBs (Pinecone/Weaviate/Supabase). Trading: Python, Node, FastAPI/Django, backtesting with pandas/NumPy, TA-Lib, Alpaca/IB/CCXT, low-latency websockets, execution bots. Blockchain/Bittensor: Solidity, ethers.js, wagmi, Hardhat/Foundry, Substrate, TAO/Bittensor tooling, custodial flows. SaaS/eCommerce/Fintech: Next.js/React, TypeScript, Node/Nest/FastAPI, Postgres/MySQL, Redis, Stripe/Adyen/PayPal, Shopify integrations. DevOps/VPS/Cloud: AWS/GCP/Vercel, Docker/K8s, CI/CD (GitHub Actions), Terraform, observability (Grafana/Prometheus), edge/CDN, high-uptime VPS orchestration.

Still have questions?

Can't find the answer you're looking for? Our team is here to help you with any questions about your project.

Get In Touch

Let's build your next project

Ready to partner with a NYC software agency to build your next product? Let's discuss your project requirements.

Schedule a consultation or send us a message to get started on your next innovative solution.

Send us a message

Prefer to talk?

Book a 30-minute consultation call to discuss your project in detail.

Book a Call

Reach us

Email

support@youronlycofounder.com

Location

New York City · Serving clients globally

Response Time

Within 24 hours

What happens next?

1

Discovery Call

We'll discuss your project requirements

2

Proposal

Receive detailed project proposal

3

Development

We start building your MVP