Senior Backend Developer
Listed on 2026-03-10
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Software Development
Backend Developer, Software Engineer, Cloud Engineer - Software, Full Stack Developer
Sonata One is a rapidly scaling, regulated fund services and technology (fintech) business. We're The Private Funds Clearinghouse, connecting more than 53,000 investors with 6,500 funds and 180 fund managers around the globe. Our vision is to change the paradigm of private markets investing through harmonising the end-to-end investment process within one platform. Investors benefit from a seamless, one & done experience across the fund lifecycle (from fund selection and subscription through to settlement and reporting) underpinned by a globally compliant KYC passport and 24/7 support.
Fund managers can raise capital faster at a lower cost from a wider pool of pre-approved investors. Founded in 2015, Sonata One has a presence in eight locations worldwide including the US, UKand Luxembourg, Guernsey, South Africa and Mauritius.
We operate as #One Global Thread in line with our values:
We challenge the norm, we change the way we think and work, by connecting systems and people, while committing to our vision and each other. We are now looking to recruit an experienced Senior Backend Developer to join our global team.
As the Senior Backend Developer, you will be the cornerstone of our backend development efforts. This is not just another development role; we're seeking someone with the acumen to build frameworks and systems from scratch, championing .NET core and fostering a culture of Test-Driven Development (TDD) within the team. Your technical expertise will be pivotal in steering our backend innovations, providing guidance, and ensuring the highest standards of development practice.
Responsibilities- Drive technical standards and champion best practices within the backend team.
- Lead the design and architecture of backend systems, ensuring scalability, reliability, andoptimalperformance.
- Collaborate with other tech leads, product owners, and stakeholders to align the technical roadmap with businessobjectivesand product strategy.
- Take ownership of designing and constructing systems from the ground up.
- Address technical debt proactively,optimizeexisting systems, and prioritize maintainability.
- Provide mentorship to developers, ensuring alignment with architectural principles and standards.
- Work closely withfrontenddevelopers, product owners, and other stakeholders to ensure seamless integration and alignment of objectives.
- Engage in agile development processes, contributing to sprint planning, stand-ups, and retrospectives.
- Bachelors Degree in Information Technology preferred.
- At least 3years experience in a Senior Backend Developer role.
- Profoundexpertisein .NET core and strong knowledge of C# fundamentals.
- Hands-on experience with at least one cloud technology provider:
Azure, AWS, GCP - Comprehensive understanding of HTTP and APIs.
- Hands-on experience with both SQL andNo
Sqldatabases,demonstratinga keen understanding of their advantages and disadvantages. - Establishedtrack recordofconceptualising, designing, and deploying systems from inception.
- Expert backend development experience, with a history of working on both intricate legacy systems and greenfield development.
- Exceptional communication skills, capable of conveying complex technicalconceptsand guiding the team.
- Strong leadership qualities,emphasisingtechnicalmentorshipand setting technical standards.
- Familiarity with contemporarybuildtools,andCI/CD pipelines.
- Robust experience with TDD and a nuanced understanding of its benefits and limitations as a development practice.
- In-depth knowledge of backend development paradigms and best practices.
- Experience with caching frameworks.
- Understanding of structured logging.
- Experience with at least one messaging queue system.
Being part of the Sonata One provides a collaborative and inclusive work culture that values innovation and diversity. We believe in the power of our unique mission and we all work together towards that one single goal. We also believe in being real. We’re not a big corporate. Everyone has an important role to fulfil, and your contribution will be an integral part of our success story.
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