AI Agent Development

Custom AI Agent Development Services — Shaping the Future of Intelligent Automation

Van Data Team builds production-ready AI agents that reason, call tools, and execute multi-step workflows autonomously — from workflow audit to stable production in 2 to 4 weeks.

Delivery snapshot

  • Production-ready from day one, not after three rounds of patches
  • Multi-agent coordination that stays aligned end-to-end
  • Guardrails, observability, and cost controls built in
  • Founder-led delivery with 30-day post-launch hardening

100+

Projects

Global AI implementations delivered

5+

Years

Hands-on AI & data engineering

5.0/5.0

Rating

Verified Upwork Job Success

80%+

Savings

Operational cost reduction

Seamless Ecosystem & Tool IntegrationProduction-Ready StandardsTransparent ROI Tracking

Six outcomes of working with Van Data Team

01

Production-ready agents from day one, not after three rounds of patches

02

Multi-agent coordination that stays aligned end-to-end

03

Guardrails and observability built in — not bolted on

04

Human-in-the-loop review at exactly the right decision points

05

Cost and latency that stay inside defined parameters from launch day

06

Two to four weeks from workflow audit to production for scoped builds

What AI Agent Development Delivers

Scale your operations 10x without hiring, through autonomous systems that reason, call tools, and execute multi-step workflows at production-grade reliability.

AI agent development services involve designing, building, and deploying autonomous AI systems that execute multi-step workflows across tools, APIs, and data sources, without human direction at every step. VanDataTeam delivers these systems production-ready in 2 to 4 weeks, backed by a 100% Upwork Job Success Score.

A production-ready AI agent is not a chatbot with a longer prompt. It is a custom-built system that perceives inputs, reasons across multiple steps, calls tools and external APIs, coordinates with other agents, and delivers outcomes autonomously. The architecture underneath determines whether that system runs reliably in production or collapses the moment inputs become unpredictable.

Van Data Team is an AI and data engineering company specializing in AI agent development services for product teams, operators, and founders who need autonomous execution that works in the real world. Every engagement covers workflow audit, architecture design, multi-step agent implementation, production deployment, and a 30-day post-launch hardening window — led by founder Tran Tien Van from the first call through stable production.

Four structural gaps break most AI agent projects before they reach stable production: agents that pass demos but collapse under real input variation, multi-agent systems connected without explicit coordination logic, builds shipped without human-in-the-loop checkpoints at consequential decisions, and no cost or latency controls until a billing surprise forces the conversation. Van Data Team addresses all four inside a single founder-led delivery loop.

Six Pillars of Production Delivery

What AI Agent Development Delivers for Your Business

Six core delivery pillars that separate a production-ready AI agent from a system that breaks under real conditions.

Production-Ready Agents That Perform Under Real Conditions

Persistent state, graph-based routing, enforced failure boundaries.

A production-ready AI agent is defined by three core properties: persistent state management, graph-based conditional routing, and enforced failure boundaries. It is not a better prompt — it is a fundamentally different architecture.

Van Data Team designs for production failure modes before writing a single line of implementation. State schemas are explicit TypedDicts. Conditional routing is defined as graph edges, visible, testable, and debuggable. Retry limits, timeout thresholds, and fallback paths are enforced at the framework level. Every build is stress-tested against adversarial inputs and API failure scenarios.

  • Explicit TypedDict state schemas
  • Graph edges, not prompt-buried branching
  • Stress-tested against adversarial inputs

Multi-Agent Orchestration That Stays Coordinated End-to-End

Connecting agents is not the same as coordinating them.

As workflows grow more complex, teams move from single-agent systems to multi-agent AI architectures involving planners, researchers, executors, and reviewers. The failure mode shifts from agent logic to coordination logic: shared state that is not actually shared, hand-off signals that get missed, task completion that both agents independently assume has already happened.

Van Data Team selects orchestration frameworks based on what the workflow actually requires. LangGraph for deterministic, auditable branching workflows. CrewAI for role-based systems with clear ownership. Hand-off protocols, shared state schemas, and task completion signals are specified during architecture and validated before any agent enters production.

  • LangGraph for auditable branching workflows
  • CrewAI for role-based coordination
  • Hand-off protocols validated before rollout

Guardrails and Full Observability Built In From Day One

An agent without observability is a system you cannot debug.

57% of organizations now have AI agents in production (LangChain State of Agent Engineering, 2025). Most operate without per-node cost visibility or execution tracing. The first signal of a problem is typically a billing anomaly or a user complaint — neither tells you where in the execution graph the failure originated.

Every production build ships with three distinct instrumentation layers: execution tracing (full node-level logging), cost instrumentation (per-run and per-node token budgets tracked in real time), and guardrail audit logging (every rule trigger with attempted action, applied constraint, and resolution path).

  • Node-level execution tracing
  • Real-time per-run cost tracking
  • Guardrail audit logs for every rule trigger

Human-in-the-Loop at Exactly the Right Decision Points

The automation boundary is a product decision, not a default.

Google Cloud's Office of the CTO identified trust, not capability, as the defining bottleneck in enterprise AI agent adoption in 2025. Builds that treat human-in-the-loop as a fallback rather than a design constraint push everything toward autonomous execution and create risk that only surfaces after it is too late.

We map the oversight boundary during the workflow audit and implement three gate types: approval gates (pause before consequential actions), escalation routing (when inputs fall outside operating parameters), and exception surfacing (retry exhaustion and out-of-scope states). Automation handles volume. Human judgment handles decisions that require it.

  • Approval gates before consequential actions
  • Escalation routing with full reasoning context
  • Exception surfacing with recovery context

Cost and Latency That Stay Inside Defined Parameters

Unbounded tool calls and uncapped retries are architecture failures.

A single retry loop triggered by a malformed API response can exhaust a workflow's daily token budget in under two minutes. Per-node latency outliers stay invisible in aggregate metrics until they degrade user experience at scale.

Van Data Team defines four cost and latency controls during architecture: hard-capped token budgets per workflow run, retry policy with exponential backoff and hard timeouts, per-node latency targets with alerting, and per-run cost tracking active from day one with automated anomaly flagging.

  • Hard-capped token budgets per run
  • Exponential backoff + hard timeouts
  • Anomaly-flagged per-run cost tracking

AI Agent Development Timeline: Audit to Production in 2–4 Weeks

Scope expansion mid-implementation is a planning failure, not a technical one.

According to McKinsey, 67% of technology projects experience schedule overruns — the leading cause is decisions deferred past the point where they can be made cheaply. Van Data Team eliminates that pattern by front-loading every decision that prevents timeline drift.

Before implementation begins, the workflow audit produces a written scope document covering workflow map, framework selection, integration architecture, and human-in-the-loop decision points. Architecture is finalized before code is written. Testing runs against real production scenarios throughout the build rather than as a compressed phase at the end.

  • Written scope before implementation
  • Architecture locked before coding
  • Testing runs continuously, not at the end

Founder-Led Execution Loop

How Van Data Team Delivers End-to-End AI Agent Development Services

A four-stage delivery loop that keeps business context and technical execution in the same conversation, from the first workflow audit through post-launch monitoring.

Analyze My Workflow
  1. Stage 1

    Workflow Audit

    Every engagement begins here, before any framework is chosen. The audit maps the current workflow end-to-end and surfaces everything that shapes the architecture.

    • Process mapping: triggers, data sources, decision points, branching conditions
    • Human judgment boundary: which decisions require oversight vs. safe to automate
    • Constraint inventory: integrations, compliance, latency, budget parameters
    • Output: a written scope document with architecture recommendation and delivery timeline
  2. Stage 2

    Architecture & Framework Selection

    Framework selection is driven by workflow requirement, not vendor preference. The right choice depends on coordination complexity, auditability, and time-to-production.

    • LangGraph for complex branching workflows with stateful execution
    • CrewAI for role-based multi-agent coordination
    • OpenAI Agents SDK for velocity-first builds
    • Claude (Anthropic) at the model layer for reasoning-heavy tasks
  3. Stage 3

    Build, Test, and Integrate

    Implementation follows the architecture from Stage 2. Testing is not a phase at the end — it runs throughout the build against real workflow scenarios.

    • Coverage spans normal inputs, edge cases, adversarial inputs, failure modes
    • Integration covers CRMs, databases, warehouses, internal APIs, messaging
    • Cost and latency profiling runs continuously
    • Token spend per step and latency per node tuned before production
  4. Stage 4

    Production Hardening & 30-Day Support

    Deployment includes monitoring, alerting, structured logging, and full documentation. The 30-day post-launch window is part of the delivery, not a separate support contract.

    • Edge cases that only surface under real load are addressed in-engagement
    • Model update impacts are evaluated and handled as they occur
    • Performance tuned against real usage data, not projected assumptions
    • Same person from audit through post-launch — no handoff chain

The same person who ran the audit, designed the architecture, and wrote the implementation monitors production and resolves post-launch issues. No handoff chain. One loop, start to finish.

AI Agent vs. AI Assistant

Understanding the Difference Before You Build

Not every AI solution is an agent — and building the wrong one is an expensive way to find out.

Criterion
AI Assistant
AI Agent
Core behavior
Responds to a prompt
Executes a workflow autonomously
Scope
Single-turn or conversational
Multi-step, across tools and systems
Decision-making
Generates text based on input
Reasons, decides, and takes action
Tool use
Limited or none
Dynamic, context-driven, multi-tool
Memory
Session-level at best
Persistent across steps and sessions
Handles failure?
Returns an answer regardless
Routes failures to retry logic or human review
Integration depth
Minimal
Deep — CRMs, databases, APIs, pipelines
Cost model
Per prompt
Per workflow run, with token budget controls
Human oversight
Optional, post-hoc
Designed in — approval gates, escalation routing
Best for
Q&A, summarization, drafting
End-to-end process automation
Breaks when
Input falls outside training
Architecture doesn't match workflow complexity

AI Search Era Warning

80% of businesses are losing ground to competitors with better-built systems — without realising it.

Four warning signs that your current AI or data stack is holding you back:

  • AI agent prototype works — but can't scale to production
  • Website not appearing in AI Overviews or ChatGPT answers
  • Data pipelines breaking or delivering stale, unreliable data
  • Spending on freelancers but deliverables miss the mark
  • If you're experiencing any of the above — it's time to talk.

Real Work — Shipped

Companies That Have Scaled Smarter with Van Data Team

150+ AI Agent, Data Engineering, and automation projects delivered across 15+ countries — each shipped production-ready with measurable operational savings.

Multi-step business automation5.0

Flowise & n8n AI Agent Workflow

Client needed an AI agent workflow built with Flowise and n8n for automated multi-step task execution across integrated business tools. We designed the agent architecture, configured tool integrations, tested against real workflow scenarios, and delivered a production workflow.

Flowisen8nWebhooks

Verified client — Jason Y.

Unstructured document repository5.0

Large-Scale Data Extraction Agent

Client required an agent capable of extracting structured data from a large, varied document repository at scale — with inconsistent formatting, missing fields, and encoding variation. We built the extraction pipeline with document parsing, structured output validation, and delivery into the operational system.

PythonDocument ParsingStructured Outputs

Verified client — Chod S.

Schema design + full tool flow5.0

Multi-Phase AI Agent System

Engagement spanning multiple project phases covering granular data schema design, agent architecture, and full tool flow implementation. We designed the data schema, specified agent tool integrations, and delivered the complete system with documentation.

Very knowledgeable and professional. Good communication.
LangGraphPostgreSQLCustom Tools

Verified client — Gilad B.

Warehouse → API layer5.0

BigQuery Pipeline Automation + AI-Ready API

Client needed BigQuery pipeline automation connected to lightweight API endpoints for downstream AI consumption. We designed and shipped the pipeline with monitoring, alerting, and the API layer.

Great backend developer, highly recommend!
BigQueryFastAPIAirflow

Verified client — Chris K.

Consulting engagements5.0

LLM Architecture Review & Agent Design Consultation

Multiple engagements covering LLM architecture review, agent design consultation, and implementation guidance for teams building AI systems in-house. Each consultation delivered a practical scope and architecture recommendation.

ConsultingArchitecture ReviewScoping

Verified client — Multiple clients

Client Voices

What clients say about our AI Agent development services

Van Data Team builds production-ready AI agents and agentic systems that automate real workflows, cut operational costs, and scale with your business.

TS
Tomer S.

@tomers

"Van exceeded all expectations with exceptional professionalism and expertise. The work landed ahead of schedule and the quality was consistently high."
Ahead of scheduleStrong communication

Project Manager

Enterprise client | Enterprise data pipeline architecture

FZ
Feng Z.

@fengz

"One of the best contractor experiences I have had on Upwork. The task was challenging and everything was delivered perfectly ahead of schedule."
Perfect deliveryHandles complexity

Technical Lead

Tech company | Financial data processing system

PT
Preska T.

@preskat

"Tran demonstrated a deep understanding of our requirements and made a meaningful difference in the final outcome from day one."
Strategic thinkingStrong requirements sense

Data Science Lead

Tech startup | Real-time analytics platform

NR
Nate R.

@nater

"Van is excellent to work with. Complex requirements never became blockers and communication stayed strong the entire time."
Great communicationComfortable with complex systems

Engineering Lead

Tech company | Healthcare data pipeline

KM
Kevin M.

@kevinm

"Van's expertise in data engineering is remarkable. He optimized our pipelines and saved us months of development time."
70% faster performanceRemarkable expertise

Data Manager

Academic institution | E-commerce analytics system

TK
Thomas K.

@thomask

"Excellent developer with strong Python and JavaScript skills. We will absolutely reach out again for future scraping work."
Python and JS depthGreat first engagement

Senior Developer

Denver tech startup | Complex web scraping script

The Van Data Team Difference

Why 150+ Businesses Partner With Us

Across 15+ countries, teams choose Van Data Team for production-grade delivery, not slideware. Here's what that looks like in practice.

Cross-Domain Mastery

Most agencies own one layer. We connect AI agent development, data pipeline engineering, and workflow automation under a single team so nothing gets lost between specialisms.

Full-Cycle Accountability

From the first workflow audit through stable production, one team owns the outcome at every stage. No handoffs, no finger-pointing. Four-stage delivery process and 5-star Upwork track record.

Production-Grade by Design

Reliability is not bolted on after launch. Every system ships with observability, safety guardrails, human-in-the-loop checkpoints, and latency optimization enforced from day one.

Flexible, Startup-Friendly Engagements

Clear scope before we start, delivery sprints from two to four weeks, and pricing that works for scaling businesses without locking you into rigid retainers.

Long-Term Partnership

We stay in the conversation after go-live, iterate based on real-world performance, and remain genuinely invested in how your business grows. Success is your outcome, not a closed ticket.

Tech Stack

Technology chosen for the operating constraint

Frameworks and infrastructure selected to match the workflow requirement, not a default toolkit.

Layer
Tools & Technologies
Agent Orchestration
LangGraphCrewAIOpenAI Agents SDK
Model Layer
Claude (Anthropic)OpenAI GPT-4o
Memory and State
PostgreSQLBigQueryRedisMemorySaver
Vector Retrieval
pgvectorChromaDBPinecone
Integration Layer
FastAPIREST APIsWebhooksKafkaAirflow
Data Infrastructure
BigQuerydbtAirflow
Deployment
AWSGCPDockerCloud Run
Observability
LangSmithStructured LoggingCost Dashboards
Scraping & Automation
PlaywrightSeleniumScrapy

Frequently Asked Questions

Questions teams usually ask before kickoff

These are the questions that usually shape scope, integration decisions, and rollout planning before the build starts.

An AI agent is a system that takes a goal, breaks it into steps, calls tools or APIs to complete each step, observes the result, and continues without a human directing each action. It executes a workflow autonomously, across multiple systems, over multiple steps. A chatbot responds to a message. An AI agent completes a process.

A chatbot handles single-turn responses within a conversation. An AI agent executes multi-step workflows across multiple tools and systems querying databases, calling APIs, writing records, routing decisions, and taking actions autonomously. The operational scope is categorically different.

State management, guardrails, observability, cost controls, retry and timeout handling, human-in-the-loop checkpoints, and monitoring that alerts you to failures before users encounter them. A demo agent has none of these. A production agent has all of them from day one.

Framework selection is matched to the workflow requirement. LangGraph for complex branching workflows where stateful execution and auditability matter most. CrewAI for multi-agent coordination with specialized roles. The OpenAI Agents SDK for velocity-first builds. Custom stacks when a framework adds unnecessary complexity. The audit stage produces a recommendation with rationale before implementation starts.

Single-agent workflows: two to four weeks from audit to production. Multi-agent systems with complex integrations: four to eight weeks. The workflow audit produces a delivery estimate based on actual scope, not a rough range adjusted upward mid-project.

Engagements are scoped after the workflow audit because pricing reflects actual build complexity. Strategy Sprints are fixed-price. Production builds are priced per project based on scope, framework complexity, and integration requirements. Book a free 30-minute consultation for a realistic estimate.

Every production build includes a 30-day post-launch hardening window as part of delivery. Issues that surface under real load during this period are addressed as part of the engagement, not billed separately. Ongoing embedded partner support is available after the 30-day window.

Yes. Most builds involve integration with CRMs, databases, data warehouses, internal APIs, and communication platforms. The workflow audit maps your existing stack and specifies integration architecture before implementation starts.

Yes. Based in Ho Chi Minh City, Vietnam, with working overlap across the US, UK, EU, and APAC time zones. Most client communication happens asynchronously with scheduled synchronous calls for key decision points.

Tran Tien Van founder of Van Data Team leads and executes every engagement. Workflow audit, architecture decisions, implementation, integration, deployment, and post-launch hardening are all handled by the same person. No handoff chain.

Book 30-Minute Workflow Consultation

Every week without a production-ready AI agent is a week your competitors pull further ahead.

Van Data Team's AI agent development services take you from workflow audit to stable production in two to four weeks, led by one founder from start to finish.

  • Free consultation
  • Quote within 24 hours
  • 2–3 month warranty
Book Your Free Workflow AuditEmail tienvan0158@gmail.com

Or reply with your workflow details — we'll return a realistic scope estimate within one business day.