Java Full Stack Developer

Primus Global Technologies; Bengaluru; On-site; INR 4,000,000 - 7,500,000; Full time

Job summary

Primus Global Technologies is seeking a Backend Engineer for the 10-4 App. You will own backend microservices from design to cloud deployment, ensuring 99.99% uptime for critical fueling and payment workflows while building scalable features for active users.

The role requires expert Java Spring Boot and Python skills, with experience migrating SOAP to REST, enhancing observability, and managing CI/CD in AWS ECS environments. You will influence architecture and security at scale.

Qualifications

• 10+ years of professional software engineering experience.
• Experience with backend services and cloud deployment.
• Expertise in high-concurrency, async environments and diagnostics.
• Agile/Scrum experience with backlog refinement and sprints.
• Ability to design for secure, scalable payment workflows.

Responsibilities

• Design and maintain high-performance microservices using Java Spring and Python.
• Migrate legacy SOAP services to REST APIs and move high-concurrency services from Python to Java.
• Improve observability with Grafana and tracing; implement API gateway throttling via Apigee migration.
• Oversee CI/CD pipelines using GitHub Actions; manage AWS ECS deployments and multi‑AZ setups.
• Provide production support and harden the platform for 99.99% uptime.

Skills

Python

Java (Spring Boot)

REST APIs

AWS

ECS

Kafka

CI/CD

Observability

Perl

Bash

Tools

Grafana

Prometheus

Docker

GitHub Actions

Terraform

Apigee

Job description

Job Description

Backend Engineer Java Full Stack (10-4 App)

Role Overview

As a Backend Engineer for the 10-4 App, you will be a critical contributor to a high-growth mobility platform designed for owner-operator semi-truck drivers. You will take end-to-end ownership of backend microservices from design through to cloud deployment and production support. Your mission is to harden the 10-4 platform, ensuring 99.99% uptime for critical fueling and payment workflows while building scalable features to support our active users.

Key Responsibilities

• Design and maintain high-performance microservices using Java Spring and Python. Lead the migration of legacy SOAP services to REST APIs and the transition of high-concurrency services from Python to Java for improved thread-safe processing.
• Bridge gaps in monitoring and observability by integrating services with Grafana and standardizing distributed tracing. Implement rate limiting and bidirectional throttling through API Gateway (Apigee) migration.
• Champion PCI 4.0 compliance by implementing secure tokenization and feature-flagging strategies. Fortify the app against fraud through the implementation of 3D Secure (3DS) and secure authentication services (Okta).
• Take full ownership of CI/CD pipelines using GitHub Actions. Manage services within AWS (ECS), including autoscaling policies, IP allocation, and multi-AZ deployments for automatic failover and disaster recovery.
• Provide "hyper-care" during user ramp-ups, including troubleshooting complex production issues like circuit breaker loops or DNS caching errors. Reduce customer support load by enhancing the Admin Hub with precise error reporting and self-service capabilities.

Technical Requirements

Required Stack / Skills

Languages

Expert: Python, Java (Spring Boot). Familiarity: Perl, Bash.

Cloud / Infra

AWS Specialist: ECS, S3, RDS (PostgreSQL/Aurora), ElastiCache (Redis), Kafka.

DevOps

GitHub Actions, Terraform (Terragrunt), Docker/Containerization, Fabric.

Observability

Splunk, Grafana, Prometheus, Datadog (migration focus).

Architectures

Event-driven design (Kafka/Avro), Micro-Frontend (MFE), RESTful API design.

Professional Qualifications

• 10+ years of professional experience in software engineering.
• Proven ability to navigate the entire software lifecycle, including hands-on testing (Robot Framework, LambdaTest) and cloud deployment.
• Expertise in diagnosing root causes in high-concurrency environments (e.g., async event loop timeouts, thread locking, or connection pool saturation).
• Experience working in Agile/Scrum environments, participating in weekly backlog refinement and sprint planning to drive clear task writing and delivery.
• Ability to make technical decisions through a customer lens, focusing on reducing friction in onboarding and payment workflows.

What We're Looking For

We are looking for an engineer who treats "Production" as part of their development environment. You should be comfortable analyzing TCP fins in firewall logs, adjusting autoscaling parameters, and implementing "jitter" in backoff mechanisms to prevent thundering herd issues during major marketing campaigns.