Demo caseSaaS · Booking
Multi-location booking platform
MVP with admin dashboard, payments and customer app, ready for its first wave of users.
MVP live in 6 weeks
- Next.js
- Node.js
- PostgreSQL
- Stripe
Tech consultancy · AI-powered
Custom software, at the speed of AI.
We design, build and modernize systems for startups, SMBs and companies. Senior team + AI across the whole lifecycle: ship in weeks, not months, with clean code you fully own.
- Proposal in 48h
- Senior team
- You own 100% of the code
- English · Español
atheris — pipeline
$ atheris discovery --client your-company✓ Scope, risks and architecture defined$ atheris build --ai-assisted --review senior✓ Sprint 1 deployed to staging✓ Tests, CI/CD and docs included$ atheris ship --prod
Technologies we work with
- React
- Next.js
- Angular
- Flutter
- Node.js
- Python
- .NET
- PostgreSQL
- AWS
- Azure
- Docker
- LLMs · RAG
Services
Everything your product needs, in one team
From idea to production, or from legacy system to modern platform.
Custom development
Web and mobile apps, SaaS, portals and internal systems built from scratch for your business.
- MVPs in 4–8 weeks
- Web, mobile and backend
- APIs and integrations
- UX/UI included
Modernization & refactoring
We rescue legacy systems: refactoring, paying down tech debt, cloud migration and performance tuning.
- Code audit
- Incremental migration, zero downtime for the business
- Cloud & DevOps
- Tests & observability
AI integration
We bring AI into your processes: assistants, agents, search over your documents and automations.
- Chatbots & agents
- RAG over your data
- Process automation
- Evals & cost control
Consulting & staff augmentation
Architecture, technical audits, fractional CTO or senior engineers embedded in your team.
- Fractional CTO
- Technical audits
- Embedded senior devs
- Mentoring & best practices
Why Atheris Tech
Startup speed, senior-team quality
AI-driven speed
AI accelerates boilerplate, tests and docs. Your budget goes into what actually adds value.
Senior quality
Every line gets senior human review. Clean architecture, tests and code any team can maintain.
Competitive pricing
Fewer hours per deliverable thanks to AI: prices below a traditional agency, without cutting quality.
End-to-end partner
Strategy, design, development, deployment and support. One point of contact who understands your business.
AI with judgment
How we use AI (and how we don’t)
AI is our multiplier, not our replacement. Here’s how we make sure:
- 01
Humans decide
Architecture, security and product decisions are always made by the senior team.
- 02
Mandatory review
All AI-assisted code is reviewed, tested and goes through CI before it reaches production.
- 03
Your data, protected
NDA from day one, and AI tools configured not to train on your code or data.
- 04
No lock-in
Code, infrastructure and docs are yours. Stay with us or move on — your call.
Process
From idea to production in 4 steps
- 1
Discovery
Free 30-min call to understand your business, goals and constraints.
- 2
Proposal
Within 48h you get scope, architecture, a phased plan and a fixed or monthly price.
- 3
Build
Short sprints with weekly demos. You see real progress, not reports.
- 4
Launch & support
Deployment, monitoring, training and an optional maintenance plan.
Who we serve
We work with
Startups
MVPs and products that scale with your round.
SMBs
Digitize processes and internal systems.
Mid-size companies
Modernize legacy and add capacity.
Founders
Validate your idea fast, with zero waste.
Agencies
White-label development for your clients.
Work
Projects that show how we work
Sample cases while we publish our first real case studies with our clients’ permission.
Demo caseLogistics · Legacy
Monolith to cloud migration
Incremental refactor of a 10-year-old system into modular services, without stopping daily operations.
Deploys went from weekly to daily
- .NET
- AWS
- Docker
- CI/CD
Demo caseServices · AI
AI customer support assistant
Agent connected to the knowledge base and CRM that resolves common questions and escalates the rest.
Instant answers 24/7
- Python
- RAG
- LLMs
- WhatsApp API
Pricing
Clear models for every kind of need
Indicative prices in USD. Every proposal is tailored to the real scope after discovery.
Custom project
Defined scope, fixed price per phase.
fromUS$4,900
- Discovery & architecture
- UX/UI design
- Development + QA
- Production deployment
- 30-day warranty
Most popular
Development subscription
Dedicated team and an ongoing roadmap. Pause or cancel anytime.
fromUS$2,900/mo
- Senior team + AI
- Weekly sprints & demos
- Flexible priorities
- Support & maintenance
- No lock-in
Specific implementation
One-off refactor, integration, feature or audit.
fromUS$1,500
- Technical audit
- Scoped refactor or migration
- AI or API integration
- Delivered in 1–3 weeks
- Report & documentation
Need staff augmentation or a fractional CTO? We quote by profile and allocation.
Team
Founding partners
A small senior team, directly accountable for every project.
- BC
Bryan Castro
CTO · Senior Fullstack Developer
Leads architecture and technical quality on every project, from frontend to infrastructure.
- EC
Elkin Castro
Backend Developer
Robust, secure and scalable APIs, databases and integrations.
- MB
Marlon Barriga
Fullstack Developer
Builds complete features end to end, from data model to UI.
- AC
Alexis Castro
Frontend Developer
Fast, accessible, polished interfaces for web and mobile.
FAQ
Frequently asked questions
How long does a project take?
An MVP is usually live in 4–8 weeks. A specific implementation, in 1–3 weeks. Your proposal includes a phased plan with dates.
Do I own the code?
Yes. All code, infrastructure and documentation are yours from the first commit, in your own repositories.
Does AI write all the code?
No. AI speeds up repetitive work, tests and docs; architecture and decisions are made by the senior team, and everything gets human review.
Do you work with international clients?
Yes. We work remotely with clients across the US, Latin America and Spain, in English or Spanish.
Can you take over a project another team started?
Yes. We start with a technical audit to understand the real state of the code and propose a stabilization plan.
What happens after launch?
We include a 30-day warranty and offer maintenance plans or the monthly subscription to keep evolving the product.
Blog
See all articles Engineering and applied AI insights
·5 min read
How AI speeds up development without sacrificing quality
AI doesn’t replace a senior team — it multiplies it. Here’s where it delivers real speed and where we keep humans in control.
Read article·6 min read
Modernizing a legacy system without stopping the business
A full rewrite is rarely the answer. The strangler fig pattern and incremental migration reduce risk and cost.
Read article·4 min read
From idea to MVP in 6 weeks: how we plan it
An MVP isn’t a cheap version of the final product — it’s the smallest experiment that validates your hypothesis.
Read articleHave a project in mind?
Tell us what you need and within 48h we’ll send a proposal with scope, timeline and budget.