Java Backend Developer with Blockchain exp

Photon; Dallas (TX); On-site; USD 120,000 - 180,000; Full time

Job summary

Photon is seeking a Backend Engineer to design, develop, and scale Java-based microservices. You will work on security, performance, and cloud-native architectures, integrating blockchain and digital asset workflows.

The role emphasizes API design, event-driven systems with Kafka, and collaboration with Angular front-ends to deliver robust digital experiences for enterprise customers.

Qualifications

• Strong experience with Java backend systems and microservices.
• Experience with blockchain technologies and smart contracts.
• Familiarity with cloud-native architectures and API design.

Responsibilities

• Design, develop, and scale backend services using Java (JDK 11+) and Spring Boot.
• Design, develop, and document RESTful APIs and service integrations; ensure security and performance.
• Build and maintain event-driven systems using Apache Kafka; enable real-time processing.

Skills

Java

Spring Boot

Angular

Blockchain

Cloud-native

Distributed systems

API development

Kafka

Ethereum/Smart contracts

Tools

Kafka

Ethereum

Hyperledger Fabric

Polygon

Binance Smart Chain

Job description

For the past 20 years, we have powered many Digital Experiences for the Fortune 500. Since 1999, we have grown from a few people to more than 4000 team members across the globe that are engaged in various Digital Modernization. For a brief 1 minute video about us, you can check https://youtu.be/uJWBWQZEA6o.

Jon Title: Java Backend Developer with Blockchain / Digital Assets

Job Type: Fulltime with Photon

Job Description:

We are seeking a highly skilled Backend Engineer with expertise in Java, Spring Boot, Angular, Blockchain / Digital Assets, and Cloud-Native Technologies to design, develop, and scale mission-critical applications. The ideal candidate will build secure, high-performance microservices, event-driven systems, and blockchain-integrated applications while contributing to modern web interfaces using Angular.

This role requires strong experience in distributed systems, cloud infrastructure, API development, and blockchain technologies, with the ability to deliver scalable solutions in a fast-paced environment.

Key Responsibilities:

Blockchain Development:

Design and integrate blockchain-based solutions for secure and transparent transactions.

Develop and interact with smart contracts using blockchain platforms such as Ethereum, Hyperledger Fabric, Polygon, or Binance Smart Chain.

Build backend services that interact with blockchain nodes, wallets, and distributed ledgers.

Ensure security, data integrity, and auditability of blockchain integrations.

Design, develop, and maintain scalable backend services using Java (JDK 11+) and Spring Boot.

Build and optimize microservices following cloud-native and domain-driven design principles.

Implement secure and maintainable business logic for complex enterprise applications.

API Development:

Design, develop, and document RESTful APIs and service integrations.

Ensure API security, versioning, scalability, and performance optimization.

Collaborate with front-end teams to support seamless API consumption.

Develop and maintain event-driven systems using Apache Kafka.

Implement real-time event processing, asynchronous communication, and stream processing solutions.

Monitor and optimize event pipelines for reliability and throughput.