Senior .NET Developer

Job not on LinkedIn

🔥 0 minutes ago

🇧🇷 Brazil – Remote

⏰ Full Time

🟠 Senior

🔙 Backend Engineer

👻 Ghost score 19%

What it means: the chance that no one is really hiring for this job.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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AVANTTi

WebsiteLinkedInAll Job Openings

51 - 200 employees

💼 Consulting

📦 Logistics

🏭 Manufacturing

Consulting • Logistics • Manufacturing

AVANTTi is a Brazilian technology services company that helps organizations maximize the value of their technology and innovation projects through its VMO (Value Management Office) methodology. It offers IT staffing and hunting (outsourcing/bodyshop), rapid squad formation, a software factory for technologies like ABAP, Java and . NET, and portfolio/SAFe management to support digital transformation across sectors such as banking, manufacturing, logistics, retail and education. The company operates from Curitiba, São Paulo and Rio de Janeiro and focuses on B2B delivery, enterprise IT solutions and talent allocation.

📋 Description

• Develop features and enhancements in C#/.NET (.NET Framework, modern .NET, ASP.NET Core, Web API, and MVC). • Investigate and fix bugs, optimize SQL Server routines, and maintain legacy systems (IIS, Windows Server), ensuring the integrity of financial processing. • Identify, analyze, and mitigate code and architecture vulnerabilities, including OWASP Top 10, SQL Injection, XSS, CSRF, SSRF, and IDOR/BOLA. • Review and implement secure authentication and authorization mechanisms (OAuth 2.0, OpenID Connect, JWT, and integrated authentication). • Fix insecure SQL queries, protect sensitive data, and implement controls against unauthorized access and operation tampering. • Conduct security- and quality-focused code reviews. • Introduce automated security checks and vulnerable dependency management (SAST, DAST, SCA) into CI/CD pipelines using SonarQube and Snyk. • Write and maintain regression and automated tests. • Ensure transactional integrity, idempotency, traceability, and access segregation in financial processes. • Protect fund, portfolio, and position data while maintaining logs and audit trails as technical evidence for audits and regulatory compliance.

🎯 Requirements

• 7–10 years of software development experience, including at least 5 years of solid experience with the C#/.NET ecosystem. • Hands-on, proven experience in application security and remediating code vulnerabilities. • Strong command of C# (.NET Framework, .NET Core, ASP.NET Core, Web API, and MVC). • Advanced knowledge of SQL Server (T-SQL, stored procedures, transactions, permissions, and performance tuning). • Experience with API security (OAuth 2.0, OpenID Connect, and JWT) and OWASP Top 10 concepts. • Knowledge of software architecture (SOLID, Clean Architecture, and API design) and automated testing. • Hands-on experience supporting and integrating applications in legacy environments (IIS and Windows Server). • Knowledge of integrating security into CI/CD pipelines, Git, and static analysis tools (SonarQube, Snyk, or equivalent tools). • Experience implementing data security controls (encryption, TLS, secrets management, and audit logs). • Relevant differentiators: knowledge of or experience with financial market business rules (investment funds, portfolios, positions, processing, and reconciliation). • Technical familiarity with the OWASP ASVS 5.0 guide and the NIST SSDF framework.

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