Senior .NET Backend Developer, C#/.NET Core, Fintech

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🕒 June 3

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HumanIT Digital Consulting

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2020

🤝 B2B

🎯 Recruiter

B2B • Recruitment

HumanIT Digital Consulting is a human-centered digital consulting and talent services firm that helps organizations find, onboard and grow people while delivering digital transformation and IT-related consulting. The company emphasizes people-first values and offers services to both jobseekers and hiring companies across offices in Portugal and Switzerland. HumanIT positions itself as a partner for businesses seeking human talent and for professionals seeking career opportunities in digital and IT roles.

📋 Description

• You'll be working on backend services and application integrations within a fintech platform, connecting back-office systems with in-house and third-party applications • The environment is live and demanding — you'll be expected to design, build, and support production-grade systems where traceability, security, and data integrity are critical • The stack centres on modern .NET, with RESTful APIs, domain-driven service architecture, and SQL Server or Oracle data layers

🎯 Requirements

• At least 4+ years of C# and .NET backend development experience in production environments • Minimum 2 years of hands-on experience with .NET Core 8 or .NET 10 • Proven experience in application integration — connecting back-office systems with in-house and third-party platforms • Strong command of RESTful API design and domain-driven service architecture principles • Mandatory: prior hands-on experience in fintech, trading, or brokerage projects — this is a hard requirement, not a nice to have • Experience optimising database queries and data access layers in SQL Server or Oracle • Solid knowledge of secure coding practices and financial data handling requirements • Familiarity with API versioning, OAuth/JWT authentication , and integration patterns • Experience supporting live production systems — tracing issues, diagnosing root causes, and delivering fixes under pressure • Ability to deliver scalable, maintainable backend services using modern .NET practices • Strong problem-solving and analytical skills with the ability to work independently across multiple workstreams • Clear communication skills in English (B2 or above)

🏖️ Benefits

• 15th month salary • Health insurance covering your family • Birthday off • Mobility program for digital nomads • Real work-life balance