Software & AI engineering
Custom software, platforms, and AI products - engineered to scale.
A small, dedicated team in Niš, Serbia, building for clients around the world.
We engineer custom software, platforms, and AI systems for teams that have outgrown off-the-shelf tools - built around how your business actually works, and designed to keep up as it grows.
What we build
Tailored software built around complex business requirements, real workflows, and long-term growth - not around the limits of an off-the-shelf tool.
Intelligent applications, AI-powered workflows, LLM integrations, and practical automation that does useful work.
Fast, modern applications with reliable backend systems and carefully designed interfaces.
From an early product concept to a scalable platform built for real users.
Connecting external services, databases, business tools, and custom platforms into one system.
Improving existing applications - their architecture, performance, and maintainability - without stopping the business that runs on them.
Selected work
Marketplace platform
A complex e-commerce marketplace for buying and selling used phones - designed, built, and optimized for search by our team.
Travel agency website
A website for a Serbian travel agency, with an admin panel that lets the team manage its own content.
What it looks like
Answers grounded in your documents · Agents that use your tools · Guardrails and evaluation
Assistants and AI features that work with your own data - answering questions, drafting content, and taking actions inside your tools.
Roles and permissions · Subscriptions and billing · Admin and reporting
Multi-user platforms with the roles, billing, and admin tooling a real product needs from day one.
Event-driven workflows · Integrations with your tools · Monitoring and retries
Workflows that react to events, move data between systems, and let AI handle the repetitive decisions.
Shared API and authentication · One consistent data model · Infrastructure that scales
Web apps, admin panels, and mobile clients that share one backend, one data model, and one source of truth.
Illustrative interfaces showing the kind of systems we build - not client projects.
Technologies
We pick tools for what your product needs to do - not for what's trending this month.
Frontend
Backend
Data & Infrastructure
AI & Automation
Also in our toolbox
How we work
We learn the business, the product goals, the technical requirements, and the risks worth knowing early.
Shared brief & scope
We define the software structure, data model, integrations, and the technology decisions behind them.
Architecture & roadmap
We develop in clear iterations, with code review, testing, and regular demos so you always see progress.
Working software, every iteration
We test, harden, and deploy a production-ready release - with monitoring in place from day one.
A reliable production release
We maintain, improve, and extend the product as your users and business requirements grow.
A product that keeps up
Why Remenex Dev
01 / 06
We start with the problem, the data, and the constraints - then choose the tools.
The team
You work directly with the founders - the same people who design the architecture and write the code.
FAQs
Web applications, SaaS products, internal tools and business platforms, AI-powered features, and the APIs and integrations that connect them. If your idea needs more than a website builder can offer, it's likely something we can build.
Yes. We help you define the smallest version worth building, choose a stack that won't hold you back later, and ship something real users can try - then improve it based on their feedback.
Yes. We start by finding where AI genuinely helps - search, summarization, classification, assistants, or automation - then integrate it into your existing system with attention to cost, privacy, and reliability.
Yes. We begin with a code and architecture review, share what we find, and propose a plan - from targeted fixes and performance work to gradual modernization. We only recommend a rewrite when it's truly the right call.
Yes. We're based in Niš, Serbia, and work with clients internationally. Collaboration happens remotely and in English, with regular calls and demos so you always see progress.
Mostly React, Next.js, and TypeScript on the frontend; Node.js, NestJS, Laravel, and PHP on the backend; PostgreSQL, Supabase, Firebase, and Docker for data and infrastructure; and LLM APIs for AI features. We choose the stack for each project rather than forcing one.
Send us a short description of what you're planning - even a rough idea is enough. We'll set up a call to understand the goals and constraints, then come back with a clear proposal for scope, approach, and next steps.
Start a project
Tell us what you're planning. You'll talk directly with the founders who will design and build it.