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Sokin Logo Sokin · IT - Software Development

Senior Full Stack Engineer

United Kingdom, London · Job Posted January 04, 2026
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Job Description

We are looking for a passionate Senior Engineer who wants to join our growing team in London, helping us to transform and scale our payments platform. This role will involve ownership of the entire engineering lifecycle from concept to production and release, being involved primarily in backend development with contribution to the frontend as well. As a Senior team member you will have influence with technical direction, work collaboratively with stakeholders and drive high standards for code quality and performance. To help us drive success and achieve business goals you will be responsible for designing, building, deploying and maintaining new long-term features and services that are both scalable and reliable.

Job Responsibility

  • Own the full lifecycle of software engineering, from initial design and development through deployment, monitoring, and maintenance in production
  • Collaborate with PMs, designers, and cross-functional teams to shape and refine feature requirements, ensuring alignment with business and user needs
  • Lead architectural decisions, ensuring that solutions are scalable, maintainable, and aligned with industry best practices
  • Drive the operational success of features by establishing monitoring, alerting, and support processes to ensure reliability and responsiveness
  • Mentor and guide junior developers, fostering a culture of ownership, accountability, and continuous improvement within the team
  • Participate in code reviews, ensuring that team members adhere to high standards for quality, security, and performance
  • Actively engage in troubleshooting and incident response to address production issues, continually learning from these experiences to improve future resilience
  • Design, develop, and maintain full-stack applications using Python, Flask, FastAPI, AWS, Angular, React and SQL databases
  • Optimize application performance, troubleshoot and resolve complex technical issues
  • Stay current with industry trends and emerging technologies, advocating for their application when they benefit the organization

Requirements

  • Minimum of 5 years of professional software engineering experience, with a proven track record of end-to-end feature ownership and delivery in production environments
  • Familiarity with modern frameworks, cloud platforms, and CI/CD pipelines that support full lifecycle engineering
  • Strong ability to translate business requirements into technical solutions that are scalable and maintainable
  • Experience managing both the development and operational aspects of software, with a focus on performance, reliability, and scalability
  • Excellent communication skills with the ability to effectively collaborate across technical and non-technical stakeholders
  • A proactive mindset for identifying potential improvements, optimizations, and innovations
  • Prior experience in a senior role with responsibilities for mentoring or guiding other team members
  • Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent experience)
  • Right to work in the jurisdiction they are looking to work in

What we offer

  • Agile, flexible working culture
  • Inclusive work environment
  • Dynamic team
  • Collaborative environment
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