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Stratolync Ltd
Senior Software Engineer – London, UK

Senior Software Engineer – London, UK

Hybrid

Hatfield, United kingdom

Senior

Full Time

15-10-2025

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Skills

Java JavaScript Kotlin Jira Figma SQL NoSQL Apache Kafka Apache Spark MongoDB Cassandra PostgreSQL GraphQL CI/CD Docker Kubernetes Version Control Test Architecture Databases apache git Azure react node.js AWS Google Cloud Platform Postman Spring Spark HTML5 Spring Boot CI/CD Pipelines Web Development Kafka Microservices

Job Specifications

We are seeking a Senior Software Engineer to join our hybrid team based in London. This role involves designing, developing, and maintaining complex software applications for mobile and web platforms. Ideal candidates will have a strong background in both frontend and backend technologies, with a focus on scalable, high-performance systems.

Responsibilities

* Proficiency in React Native, Java, Kotlin, and backend web development

* Experience with HTML5, CSS3, JavaScript, and modern frontend frameworks

* Strong backend knowledge with Spring Boot, Node.js, RESTful APIs, and GraphQL

* Microservices architecture and containerization using Docker, Kubernetes

* Working with SQL and NoSQL databases: PostgreSQL, MongoDB, Cassandra

* Experience writing unit, integration, performance, and load test cases

* Familiarity with CI/CD pipelines, version control tools like Git, and tools such as JIRA, Postman, and Figma

* Experience with cloud services: AWS, Azure, or Google Cloud Platform

* Knowledge of data streaming and real-time processing using tools like Apache Kafka and Apache Spark

Additional Detail

* Hybrid Role - 2-3 days per week onsite at our London office

* Flexible working hours

About the Company

Stratolync Ltd | Delivering innovation through tailored IT services Founded in April 2025 and headquartered in Watford, Stratolync is a dynamic IT services firm dedicated to empowering businesses with high-quality, reliable, and on-time technology solutions. Our expertise spans across: Application Development, IT Staff Augmentation, Business Analysis, QA & Software Testing, Training, and comprehensive consulting services. We also offer expertise in ERP, CRM, mobile apps, UI/UX, data analytics, project management, and strateg... Know more