Java Backend Developer with Blockchain exp — Photon

The Bitcoin Street Journal; Dallas (TX); On-site; USD 100,000 - 140,000; Full time

Job summary

Photon is seeking a Java Backend Developer with Blockchain experience to design, build, and scale backend services using Java, Spring Boot, and cloud-native technologies. You will work on secure, high-performance microservices and event-driven architectures with Kafka, and integrate blockchain-enabled workflows across distributed systems.

The role emphasizes API development, cryptographic considerations, and collaboration with frontend teams to deliver robust, scalable solutions in a fast-paced

Qualifications

• 5+ years backend development with Java.
• Experience building secure, scalable microservices.
• Familiarity with cloud-native architectures and API development.

Responsibilities

• Design, develop, and maintain scalable backend services in Java/ Spring Boot.
• Build microservices aligned with cloud-native and domain-driven design.
• Develop and document RESTful APIs and service integrations.
• Create and maintain event-driven systems using Apache Kafka.

Skills

Java

Spring Boot

Distributed Systems

Cloud-Native

Kafka

API Design

Security

Tools

Ethereum

Hyperledger Fabric

Polygon

Binance Smart Chain

Job description

• Company: Photon
• Sector: Blockchain
• Source: web3.career

Hello There,

Role: Java Backend Developer with Blockchain

Fulltime with Photon

Job Description:

We are seeking a highly skilled Backend Engineer with expertise in Java, Spring Boot, Angular, Blockchain, 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:

• 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.

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.

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