About Planet 

Planet is a global provider of integrated technology and payments solutions for retail and hospitality customers.  
We create great experiences for the millions of people who use our payments, software, and tax-free solutions every minute of every day. 
Planet empowers its customers to deliver great customer experiences by combining payments and software in ways that drive greater loyalty, increase revenue and save time. 
Founded over 35 years ago and with our headquarters in London, today we have more than 2,500 employees located across six continents serving our customers in more than 120 markets.

Role Overview

We are looking for a Senior .NET (C#) Developer responsible for translating application storyboards and use cases into functional applications within a complex, high-performance environment. You will work on maintaining existing systems (including compliance updates), developing new features, and contributing to test automation. A commitment to collaborative problem-solving, pragmatic design, and delivering high-quality software is essential.

What you will do:

• Convert application storyboards and use cases into fully functional .NET applications.

• Maintain current system and ensure ongoing compliance and reliability.

• Develop new features and functionalities in response to evolving business needs.

• Identify bottlenecks, optimize existing code, and leverage threading/concurrency to ensure responsiveness and scalability.

• Contribute to automated testing efforts and maintain clean, organized, and robust code.

• Investigate complex issues via logs and dumps, perform root-cause analysis, and propose straightforward solutions.

• Take full ownership of assigned tasks, driving them from requirements to successful completion with minimal supervision.

Who you are:

• Strong understanding of the .NET ecosystem, including relevant libraries and frameworks.

• Knowledge of concurrency patterns, multi-threading, and synchronization in .NET.

• Familiarity with web technologies (XML, XLS, HTML, CSS, JavaScript).

• Demonstrated ability to apply design and architectural patterns to solve complex challenges.

• Commitment to writing maintainable, well-documented, and testable code.

• Able to diagnose and resolve issues efficiently—from logs and dumps—and propose practical solutions.

• Experience with writing and optimizing SQL queries, stored procedures, and performance tuning.

• Understanding fundamental design principles behind a scalable, high-performance application.

• Proficient with Git or similar tools, including branching and merging strategies.

• Familiarity with CI/CD pipelines and automated testing.

• Familiarity with payment industry standards (ISO 8583, ISO 20022, EMV, PCI-DSS), HSMs, and cryptography is a plus.

• Self-driven with strong communication skills, capable of working independently and within a team.

Why Planet
Planet is an equal opportunity employer where diversity is valued, and all employment is decided based on qualifications, merit, and business need. 
Come and grow your career in the most exciting, fast paced technology market, with a business that delivers feel-good connected commerce. We would love to hear from you – Apply now. 

At Planet, we embrace a hybrid work model, with three days a week in the office.
 

Reasonable accommodations may be made in order to allow for an individual to perform the essential functions of this role successfully.