Senior Backend Engineer – Mobile Apps

Senior Engineer – Travel & Lifestyle Mobile Application

Location: Burgess Hill, UK

Work Mode: Hybrid – at least 3 days in office

Contract Duration: 6 months (with potential for permanent hire at end client)

About The Role

We are seeking a highly motivated, independent, and technically skilled Senior Engineer to join our team and build the service layer (backend-for-frontend) for an upcoming iOS and Android travel mobile application. This is a hands-on role where you will architect, develop, and lead initiatives across software development, solutioning, and team leadership.

Seniority Level: 8+ years of professional software development experience

Essential Criteria

6+ years of professional software development experience

Expertise in building microservices or backend-for-frontend architectures for mobile applications using Kotlin or Java 17+, with Spring and build automation (Maven/Gradle)

Strong experience with observability tools such as Sentry, ELK, Dynatrace

Experience technically leading Agile engineering teams and participating in Agile ceremonies

Deep knowledge of cloud technologies, CI/CD, and fast, reliable code delivery (e.g., Github Actions, CircleCI)

Bachelor’s degree in Computer Science or related field (advanced degree preferred)

Comfortable working on a 6-month contract with potential for permanent hire

Key Responsibilities

Application Solutioning:

Architect and design solutions based on domain-driven design in collaboration with solution architects, staff engineers, business architects, and consumer partners

Present solutions to senior leadership and wider forums, incorporating feedback and driving sign-offs

Document architecture, technical requirements, high-level and low-level designs, including component design, data models, integration views, infrastructure, and technology stack

Conduct quantitative comparative analysis on solution options

Software Development

Set up infrastructure and development environments

Write and deliver high-quality code in Kotlin

Lead code reviews and mentor peers

Build monitoring dashboards and logging/alerting strategies

Monitor system performance, improve software quality through root cause analysis

Demonstrate deep understanding of infrastructure and development tools

Maintain responsibility for planning, analysis, crafting, building, testing, and maintaining assigned applications

Leadership

Prepare and present solutions and progress updates to product and technology leadership

Collaborate effectively across engineering and enterprise teams

Mentor and coach junior team members

Influence team practices by challenging the status quo and demonstrating risk-taking

Exhibit self-reliance to achieve team goals