Kaev is a systems engineering agency that designs, builds, and connects full-stack systems that run themselves. We handle backend infrastructure, frontend engineering, AI automation, and systems integration for companies that need production-grade technology.

What kind of projects do you take on?

We build automated backend systems, GPU-accelerated frontends, AI-powered workflows, and end-to-end infrastructure that deploys, monitors, and heals itself. If your business needs a system that operates without manual intervention, that is what we build.

How much does it cost?

Pricing is per-project. After a 30-minute scoping call we send a detailed proposal with architecture, deliverables, and fixed pricing before any work begins. No surprises.

What technologies do you work with?

We choose tools based on the problem. Our primary stack includes Rust and Go for backend services, Next.js with React for frontends, Kafka for event-driven architecture, PostgreSQL for data, Kubernetes for orchestration, and Pulumi for infrastructure as code.

How long does a project take?

Every project is different. We scope thoroughly before committing so you know exactly what to expect. We deliver in phases so you see progress early and can provide feedback throughout.

Who do you work with?

Funded startups building production-grade infrastructure from day one, scaling companies replacing systems that break under growth, and any business that needs a system designed, built, and automated to run without manual intervention.

BusinessJune 5, 20265 min read

Application development for SaaS and AI tools

Building a SaaS product or AI tool is rarely just about getting features on screen. You need application logic, infrastructure, automation, security, and performance to work together from the start, especially when the product will handle real users, real workflows, and real scale.

Kaev develops applications for funded startups, scaling companies, and ambitious founders who need more than a basic app build. We design and deliver full-stack systems, AI automations, and high-performance product experiences from system design first, so your application is built to launch cleanly and keep working as the product grows.

SaaS application development and AI tool development built for production

Kaev builds application stacks for teams that need custom backend systems, modern frontend experiences, AI-powered workflows, and the infrastructure that connects them. Instead of treating your product like a collection of disconnected tasks, we engineer it as one system.

That matters even more now that AI is already part of mainstream software development. GitHub reported that more than 97% of surveyed software-team respondents had used AI coding tools at work at some point, and McKinsey found 65% of organizations were regularly using gen AI. Kaev helps you turn that shift into a real product with controlled automation, reliable architecture, and production-grade delivery.

Kaev starts every project with system design before code is written.

Depending on the product, Kaev can own the application stack end to end.

Backend systems: Rust and Go services for APIs, business logic, and performance-sensitive application workloads.
AI application logic: Agents and automations built with LangGraph, MCP, and Temporal for tool use, orchestration, and long-running workflows.
Frontend engineering: GPU-accelerated interfaces for responsive product UX, rich motion, and fast visual feedback.
Systems integration: Self-deploying, self-healing pipelines that reduce release friction and ongoing operational drag.
Web and product surface area: Cinematic marketing sites that connect your go-to-market experience to the product itself.

Kaev's architecture-first application development reduces rebuild risk

Kaev begins with system design before code is written. That approach gives your team a stronger foundation when the application has to connect user flows, APIs, data models, background jobs, AI tools, and deployment environments without turning into a rewrite a few months later.

For SaaS products, that means we can shape the core system structure, integration points, and performance-sensitive paths early. For AI tools, it means thinking through orchestration, tool access, failure modes, and security exposure before those issues become expensive.

Kaev engineers for targets such as 50k RPS and sub-10ms p99 latency when the application demands it.

You get clearer technical decisions up front, fewer surprises during implementation, and an application that is easier to extend when new features, customers, or model layers are added.

Production-grade backend, frontend, and AI automation from day one

Kaev is built for teams that need production-grade systems, not prototype-quality app work dressed up as a product launch. We treat observability, security, and performance as core build requirements because those choices affect deployment, reliability, and customer trust from the beginning.

That standard is especially important for AI applications. An agent that calls tools, touches sensitive workflows, or runs asynchronously needs more than a prompt and an API wrapper. Kaev combines backend engineering, automation frameworks, and infrastructure so your AI features behave like part of a real application.

Kaev builds AI automations with LangGraph, MCP, and Temporal inside a controlled application stack.

Kaev's published AttoGuard work shows what that looks like in practice: real-time prompt-injection defense for AI-controlled crypto wallets, covering 1,064,942+ threat patterns across 12 languages with sub-100ms latency. For a founder or product team, that is concrete evidence that we can build application layers where speed and security both matter.

If your product depends on interaction quality as much as backend logic, Kaev also engineers frontends for high-performance response, including targets such as sub-16ms UI frames when fluid motion and visual responsiveness are part of the experience.

When Kaev is the right application development partner for funded startups and scaling teams

Kaev is a strong fit when your product has real technical weight. That usually means a SaaS platform with custom backend logic, an AI tool with orchestration and automation requirements, or a product where performance, reliability, or security directly affect retention, revenue, or risk.

We work best with funded startups, scaling companies, and ambitious founders who want senior systems thinking early, not just implementation after the important decisions have already been made.

The teams that usually get the most value from Kaev need one or more of these outcomes:

A product that spans multiple layers: Backend, frontend, AI workflows, and infrastructure need to work as one application.
A higher technical bar: Latency, observability, security, or operational resilience matter from the first release.
A partner that can own the build: You do not want to coordinate separate vendors for systems, app code, AI automation, and deployment.
A platform that can grow: You want an architecture that supports expansion instead of forcing an early rebuild.

If you only need the lowest-cost implementation of a simple app with minimal systems thinking, Kaev may not be the right fit. Our work is best matched to products where technical decisions materially change business outcomes.

Clear scoping and full-stack delivery for SaaS and AI application teams

Application development becomes expensive when scope is vague and ownership is fragmented. Kaev addresses that with fast scoping and a clear delivery approach anchored in system design, so you can see what should be built now, what can wait, and where the real technical risks sit.

Because Kaev can build backends, frontends, AI automations, and connected infrastructure, you spend less time managing handoffs between separate specialists. That makes communication simpler, accountability clearer, and the delivery path easier to trust.

You are not just buying code from Kaev. You are getting an application stack that is designed to deploy cleanly, run reliably, and support the next stage of your product.

Start scoping your SaaS or AI application with Kaev

If you need application development that goes beyond feature assembly and into real system design, Kaev is built for that job. Talk with us about your SaaS platform or AI tool, and we can help define the architecture, performance requirements, automation model, and build path needed to get it into production with confidence.