Software Engineer (Backend - Java/Spring Boot)

LiftedanUpworkCompany

Geta, , Åland Islands Remote contract

Posted: April 22, 2026

Required Skills

Job Description

We are hiring a backend-focused Software Engineer to help build and operate the services that power high-scale, customer-facing product experiences. This role centers on Java and Spring Boot microservices, REST APIs, relational data systems, and reliable service design for high-throughput applications. You will also contribute to backend features and integrations that support AI-enabled product experiences and data-intensive platform workflows.

Enterprise experience strongly preferred.

Key Responsibilities

- Build, enhance, and operate backend services using Java, Spring Boot, Gradle, and microservices architecture

- Design and maintain RESTful APIs with strong attention to API lifecycle best practices

- Develop reliable, scalable services for high-throughput, data-intensive product features

- Work with relational databases such as PostgreSQL and MySQL to support production-grade systems

- Improve service resilience, fault tolerance, and performance in distributed environments

- Collaborate with cross-functional partners to deliver backend capabilities that support product and platform needs

- Contribute to integrations and backend workflows that support AI-enabled features and LLM-based service patterns

Must-Have Skills

- 5+ years of backend engineering experience with production-grade systems

- Expert proficiency in Java, Spring Boot, Gradle, and microservices

- Strong RESTful API design skills

- Understanding of API lifecycle best practices

- Proficiency with relational databases such as PostgreSQL, MySQL, or similar

- Experience with distributed systems, fault-tolerant service design, and performance tuning

- Strong communication skills and a collaborative mindset

- AI fluency, including the ability to work with AI-driven requirements and support LLM-based workflows

- Understanding of API patterns for AI services and backend support for AI-enabled product experiences

Nice-to-Have Skills

- Experience with asynchronous messaging such as Kafka or RabbitMQ

- Experience with event-driven design

- Familiarity with GraphQL

- Familiarity with API gateways or hybrid API ecosystems

- Exposure to LLM or AI APIs such as OpenAI or Anthropic

- Experience developing AI-enhanced features

- Prior remote contracting experience

- Cross-functional leadership experience

Required Tools & Platforms

- Java

- Spring Boot

- Gradle

- REST APIs

- PostgreSQL or MySQL

- Microservices architecture

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