backend developer for travel eSIM

Sim Local is a global travel eSIM provider that helps travellers stay connected in over 200 destinations worldwide through local operator partnerships, digital products, and omnichannel distribution.

• Design, build, and ship backend services and APIs across customer-facing APIs, internal back-office systems, and partner integrations
• Build, maintain, and scale Java / Spring Boot services and API gateways, keeping them secure and reliable in production
• Build and maintain integrations with networks, payment providers, and other third parties, including webhooks and event-driven flows
• Design for failure using idempotency, retries, and graceful error handling across distributed systems
• Contribute to architecture decisions and shape the platform’s technical direction as it scales
• Identify and resolve performance bottlenecks and security vulnerabilities before production
• Review code, including AI-generated code, and raise quality, testability, and security standards across the team
• Champion automated testing, clear API documentation, and good engineering practices
• Own built services in production, using observability and monitoring to keep them fast, efficient, and secure at scale
• Partner with platform engineering on infrastructure, deployments, and incident resolution
• Work with the Product Owner, developers, and technical leaders to deliver focused, value-driven changes
• Contribute to planning, agile ceremonies, and continuous improvement of team practices

• Bachelor’s degree in computer science or another relevant discipline, or equivalent work experience
• 4+ Years of backend development experience delivering production services end to end
• 2+ Years of experience building RESTful APIs and web services
• Strong Java (17+) and Spring Boot skills, including Spring Security / OAuth2 and multi-module Maven projects
• Experience with relational databases (MySQL or similar), JPA/Hibernate, and schema migration tools such as Liquibase, including schema design and query optimisation at scale
• Experience with cloud-native AWS services, including SQS/SNS, Lambda, Cognito, SES, and CloudFormation or similar infrastructure-as-code
• Experience with asynchronous, message- and event-driven architectures and distributed systems patterns such as idempotency and retry handling
• Experience with automated unit testing using JUnit and Mockito, and integration testing with Testcontainers or equivalent
• Experience with observability and monitoring using APM tools such as Datadog, New Relic, CloudWatch, or similar
• Hands-on experience with Claude Code or similar AI coding assistants, and the judgement to review, correct, and take ownership of AI-generated code
• Strong code review skills and a track record of improving code quality across a team
• Experience with caching strategies and high-traffic, high-concurrency systems such as Redis
• Experience integrating third-party APIs and webhooks, such as payment providers, telecom/carrier providers, or CRM/marketing platforms
• Experience in a cross-functional Scrum team using Jira and Confluence
• Strong delivery focus and ownership from design through production
• Proactive approach to identifying and driving improvements
• Ability to maintain high engineering standards and good practices
• Collaborative communication with product and non-technical stakeholders
• Passion for development and eagerness to keep learning
• Будет плюсом: OpenAPI / Swagger documentation, a background in telecom, eSIM, travel, or e-commerce

• Competitive salary, depending on experience
• 21 Days’ annual leave, plus an extra day for each complete year worked, up to 25 days per year
• Summer Fridays with half days on Fridays throughout the summer
• Pension scheme
• Referral scheme
• Maternity benefit