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Principal Engineer
  • Warsaw
Principal Engineer
Warszawa, Warsaw, Masovian Voivodeship, Polska
Commit
13. 11. 2025
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The company provides a unique digital investor communications platform that connects the whole investor communications ecosystem via an API driven digital pathway. Our platform is already revolutionising the world of proxy voting and shareholder disclosure by providing speed, transparency and accuracy that is unrivalled in this space.

Proxymity was founded by Dean Little and Jonathan Smalley. They were supported by Citi’s D10XSM program, an internal accelerator that supports the creation, development and launch of new concepts by employees across Citi’s businesses.

In April 2020, Proxymity was spun off and has to date raised capital from ten strategic investors. These include some of the world’s largest financial institutions, managing over $200 trillion in assets under custody: BNY Mellon, BNP Paribas, Citi, Computershare, Deutsche Bank, Deutsche Boerse, HSBC, JP Morgan, Mediant, and State Street.

We are a fast-growth company and have already gone from the original team of 10 to 200+ employees in the last five years.

The role

As a Principal Backend Engineer, you will be a technical cornerstone for our engineering teams. This is a hands-on role with a broad impact, where you will help guide architectural decisions, mentor other engineers, and steer the technical strategy for our core products. You will be ensuring our platform can meet ambitious future demands for scale and performance while maintaining the highest standards of quality and security.

You wont just be writing code; youll help shape the technical vision alongside our engineering leadership team, ensuring we build the right things, the right way.

  • Architect & Design: Lead the design and architecture of major components of our distributed, cloud-native platform, ensuring solutions are scalable, resilient, and maintainable.
  • Technical Strategy: Partner with engineering leaders to define and execute the long-term technical roadmap, anticipating future needs and challenges.
  • Solve Complex Problems: Tackle our most challenging technical problems, particularly around performance, scalability, operations and data processing within our high-throughput systems.
  • Mentor & Lead: Act as a technical mentor and force-multiplier for the engineering team. Elevate the skills of those around you through code reviews, design discussions, and knowledge sharing.
  • Drive Best Practices: Champion engineering excellence across the organization by establishing and advocating for best practices in coding, testing, security, and cloud architecture.
  • Hands-On Development: Remain hands-on, contributing high-quality code for critical path features and complex infrastructure components.

Requirements:

  • Extensive experience in software engineering in a commercial environment (minimum of 10 years), with a proven track record of designing and delivering complex, large-scale distributed systems in a high growth environment.
  • Deep expertise in Java and modern frameworks like Spring Boot.
  • Strong proficiency with relational databases, including PostgreSQL and/or MSSQL, with a solid understanding of data modelling and query optimization.
  • Hands-on experience with message brokers and event-driven architectures, specifically with Apache Kafka.
  • Comprehensive knowledge of cloud platforms, with a strong preference for AWS. You should be comfortable with core services like ECS/Fargate, S3, and RDS.
  • A strategic mindset with the ability to think abstractly and translate business requirements into a robust technical vision.
  • Good communication and leadership skills, with a demonstrated ability to influence and mentor other engineers.

Desired Skills, But Not Essential

  • Experience in the Fintech domain or with financial services platforms.
  • A background in solving complex scalability and performance challenges in a high-growth environment.

Benefits

  • An exciting, fast-growth scale up environment with excellent career growth opportunities
  • Hybrid remote & office working set up
  • A competitive salary
  • Bi weekly Yoga lessons
  • Subsidized Headspace subscription

Seniority level

  • Seniority level

    Not Applicable

Employment type

  • Employment type

    Full-time

Job function

  • Job function

    Engineering and Information Technology
  • Industries

    Software Development

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