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Web & AI software consultancy

We build web and AI applications that move your business forward.

DO2 Online designs, develops and runs custom software, from robust web platforms to AI assistants, agents and automations that hold up in production.

Start your project See what we do
  • Senior engineering team
  • From idea to production
  • Remote, worldwide

Services

End-to-end software development

A single partner to take your product from concept to launch, and keep it improving afterwards.

Web application development

Custom platforms, SaaS products, portals and internal tools, fast, secure and built to scale.

  • SPAs & server-rendered apps
  • SaaS & multi-tenant platforms
  • Dashboards & back-offices

AI applications

Assistants, copilots and agents powered by large language models, connected to your data and tools.

  • Chatbots & copilots
  • RAG over your documents
  • Autonomous agents & workflows

APIs & integrations

We connect your systems (CRMs, ERPs, payments, third-party services) through clean, documented APIs.

  • REST & GraphQL APIs
  • Third-party integrations
  • Data pipelines

Cloud & DevOps

Reliable infrastructure, CI/CD and observability, so you can ship often and sleep at night.

  • AWS, GCP & Azure
  • Docker & Kubernetes
  • Monitoring & cost control

Product & UX design

Discovery, prototyping and interface design focused on what your users actually need.

  • Discovery workshops
  • Interactive prototypes
  • Design systems

Maintenance & evolution

We take over, modernise and extend existing applications, including legacy code.

  • Code audits & refactoring
  • Performance & security
  • Ongoing support

Artificial intelligence

AI that works in production, not just in demos

We help you find where AI creates real value, then build it with the same engineering rigour as any critical system.

  1. 1
    Clear use case and ROIWe start with a business problem, not a model.
  2. 2
    Evaluated and measurableTest suites and metrics to track quality, accuracy and drift.
  3. 3
    Secure and privateYour data stays under control, with access policies and auditing.
  4. 4
    Cost-efficientThe right model for each task, with caching and monitoring of usage.

Intelligent assistants

Customer support and internal copilots that answer with your knowledge base and take actions.

Document processing

Extract, classify and validate data from invoices, contracts, forms and emails.

Semantic search & RAG

Find answers across thousands of documents with cited, trustworthy sources.

Agents & automation

Multi-step agents that operate your tools and automate repetitive processes.

AI features in your product

Summaries, recommendations, generation and natural-language interfaces inside your app.

Strategy & prototyping

Feasibility studies and working proofs of concept in weeks, not months.

How we work

A transparent, iterative process

Short cycles, frequent demos and constant communication. You always know where your project stands.

Discover

We understand your goals, users and constraints, and define scope, priorities and success metrics.

Design

Architecture, prototypes and a clear roadmap, validated with you before writing production code.

Build

Agile sprints with demos every iteration, automated tests and code reviews.

Launch & evolve

Deployment, monitoring and continuous improvement based on real usage data.

Technology

Modern, proven tools

We pick the stack that fits your project and your team, not the other way around.

Frontend

ReactNext.jsTypeScriptVueTailwind CSS

Backend

Node.jsPythonDjangoFastAPIRuby on RailsPostgreSQL

AI / ML

ClaudeOpenAIOpen-source LLMsLangChainVector databasesMCP

Cloud & DevOps

AWSGoogle CloudAzureDockerKubernetesGitHub Actions

Why DO2 Online

A technical partner, not just a supplier

Senior talent

Experienced engineers who work directly with you, with no layers of intermediaries.

Quality by default

Automated testing, code reviews, documentation and security best practices from day one.

Code you own

Full ownership of your code and infrastructure. No lock-in, clean handover whenever you need it.

Clear communication

Bilingual team (English and Spanish), regular updates and timezone overlap with the Americas and Europe.

Flexible engagement

Fixed-scope projects, dedicated teams or staff augmentation, whatever suits you best.

Focus on outcomes

We measure success by business impact, not by hours billed or lines of code.

Contact

Have a project in mind?

Tell us about your idea or challenge. We'll get back to you within one business day with next steps, no strings attached.