Full Stack Engineer (Java & Python AI)

Hammerjack Pty Ltd; Philippines; On-site; PHP 300,000 - 600,000; Full time

Job summary

Hammerjack Pty Ltd in the Philippines seeks an experienced engineer proficient in Java Spring Boot and Python frameworks to deliver production-grade GenAI solutions. You will design, build, and operate services leveraging modern AI patterns, with strong software craftsmanship.

Responsibilities include backend/API development, GenAI & agentic workflows, front-end work with React/Angular, data handling with vector stores, and rigorous testing with CI/CD practices.

Qualifications

• 10+ years of software engineering experience with large, complex systems.
• Strong Java/Spring Boot microservices with REST/JSON APIs.
• Advanced Python backend experience with Flask/FastAPI/Django.
• GenAI/Agentic AI hands-on experience with LLMs, RAG, or tool-usage.
• Full-stack capabilities with React or Angular and cloud/DevOps exposure.

Responsibilities

• Backend & API development using Java Spring Boot and Python frameworks.
• Design and implement GenAI features, RAG pipelines, and agentic workflows.
• Build frontends with React or Angular and ensure system observability.
• Manage data, embeddings, vector stores, caching, and secure connectors.
• Implement testing, CI automation, and AI guardrails.

Skills

Java/Spring Boot

Python backend

GenAI/Agentic AI

Front-end frameworks

REST/JSON APIs

Cloud/DevOps

Tools

Docker

Kubernetes

CI/CD

Kafka

Redis

LangChain

LangGraph

CrewAI

Job description

We are seeking an engineer who is exceptional in Java Springboot, experienced with web frameworks (Flask, FastAPI, Django), comfortable building frontends (React, Angular), and capable of delivering production-grade GenAI solutions (LLMs, RAG, Agents/Agentic AI, MCP, guardrails). Candidate should be able to design, build, and operate services and applications that leverage modern AI patterns with strong software craftsmanship.

Key Responsibilities

• Backend & API Development: Build robust backend services and APIs using Java Spring Boot and Python frameworks like Flask, FastAPI, or Django.
• GenAI & Agentic Solutions: Design and implement Large Language Model (LLM) features, Retrieval-Augmented Generation (RAG) pipelines, memory systems, prompts, and agentic workflows.
• Full-Front-End Work: Create user interfaces with React or Angular.
• Data & Infrastructure: Handle vector stores, embeddings, caching, and secure data connectors.
• Quality & Testing: Manage testing using PyTest, integration tests, CI automation, and implement AI guardrails and observability.

Qualifications:

• 10+ years of software engineering experience in designing, developing, troubleshooting, and supporting large, complex systems.
• Strong Java/Spring Boot Microservices expertise – 5+ years of microservices development and 3+ years of Spring Boot, with hands‑on experience in REST/JSON APIs and object-oriented design.
• Advanced Python backend development – 5+ years of Python experience, including Flask/ FastAPI/ Django, API design, asynchronous programming, testing, packaging, and performance optimization.
• GenAI / Agentic AI experience – At least 1 year of hands‑on experience with LLMs, RAG, agentic workflows, tool/function calling, MCP, embeddings, guardrails, and frameworks such as LangGraph/LangChain or CrewAI.
• Full-stack, cloud, and DevOps capabilities – 3+ years with React or Angular, plus experience with Docker, Kubernetes, CI/CD, Kafka, databases/vector DBs, Redis, cloud infrastructure, and observability.