Our Services

End-to-end engineering, from greenfield to scale.

A full range of backend development services for your enterprise — high-performance Java APIs, fault-tolerant Spring Boot microservices, Spring AI integration and cloud-native delivery on AWS and GCP.

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01  How we help

Build · Modernize · Optimize

Build

High-performance Java APIs and event-driven Spring Boot microservices that auto-scale with traffic and stay maintainable as you grow.

  • Spring Boot microservices & REST/GraphQL APIs
  • Event-driven architecture with Apache Kafka
  • Spring AI integration — OpenAI or in-house GPTs
  • Cloud-native delivery on AWS, GCP & Kubernetes

Modernize

Modernise monoliths into modular services, migrate massive datasets with Apache Spark, and move workloads to the cloud — without breaking what works.

  • Monolith-to-microservices decomposition
  • Java 8/11 → Java 17+/21 upgrades
  • Large-scale data migration with Apache Spark
  • AWS / GCP cloud-native migration

Optimize

Sharpen query response, add semantic search, and bring AI intelligence and full observability to systems already in production.

  • Elasticsearch & semantic search tuning
  • Spring AI recommendations & chat interfaces
  • Resilience, scaling & observability
  • QA automation & performance testing

Featured: Spring AI integration & consulting

Add RAG, semantic search, chat and MCP servers to your Java apps — explore our dedicated Spring AI services.

Explore Spring AI
02  What We Do

Solutions engineered for your business

From event-driven microservices to AI integration and cloud-native delivery — the engineering capabilities that move your business forward.

/01

Microservices

Event-driven Spring Boot microservices that auto-scale with traffic, deployed across AWS, GCP and beyond.

/02

AI Applications

Bring AI into your Java apps with Spring AI — RAG, semantic search, chat and MCP servers, powered by OpenAI or self-hosted LLMs.

/03

Command-Line Tools

Purpose-built CLI tools for continuous polling, reporting, data analysis and hands-off automation.

/04

Data Migration

Move massive datasets between sources with custom, observable Apache Spark pipelines — repeatable, resumable and zero data-loss.

/05

Cloud & DevOps

Seamless integration, deployment and management of cloud solutions — AWS, GCP, Azure and DigitalOcean.

/06

UI / UX Design

Visually refined, user-friendly interfaces that elevate every digital experience.

/07

QA & Testing

Rigorous quality assurance and testing that guarantees software reliability and performance.

/08

Digital Engineering

Cutting-edge digital solutions, engineered to meet your most demanding challenges.

03  Technology Expertise

The stack we engineer with

AWS ServicesJava 17+Apache KafkaMicroservicesSQL DatabasesElasticsearchArtificial IntelligenceApache SparkPythonReactDockerSpring BootKubernetes
04  Engagement Models

Ways to work with us

Flexible engagement models that fit businesses of every size — from fast-moving startups to large enterprises.

Dedicated Team

A senior, embedded squad of architects and lead developers that works as an extension of your team.

Project-Based

Fixed-scope delivery for a defined platform or migration, with clear milestones and transparent reporting.

Staff Augmentation

Hire Spring Boot and Java microservices specialists to fill specific capability gaps fast.

05  FAQ

Frequently asked questions

What services does Hello World Tech Consulting offer?
We build greenfield Spring Boot microservices and REST/GraphQL APIs, modernise legacy Java monoliths into modular services, migrate large datasets with Apache Spark, integrate Spring AI (RAG, semantic search, chat, MCP servers), and deliver everything cloud-native on AWS, GCP and Kubernetes — with QA automation and performance testing throughout.
Which engagement models do you offer?
Three: a dedicated senior team that works as an extension of yours, fixed-scope project delivery with clear milestones, and staff augmentation to fill specific Spring Boot or Java capability gaps fast.
What is your technology stack?
Java 17 to 21, Spring Boot, Spring Security, JPA/Hibernate, Apache Kafka, Apache Spark, Spring AI with OpenAI or self-hosted LLMs, Elasticsearch, PostgreSQL, Docker and Kubernetes, on AWS and GCP.
Do you work fixed-price or time-and-materials?
Both. Fixed-scope projects are milestone-based with transparent reporting; dedicated-team and staff-augmentation engagements run on a monthly basis. Tell us the shape of the work and we'll recommend the model.

Have a project in mind? Let's scope it together.

Tell us about your application and goals — we'll map the engineering path.

Talk to an architect