Senior Full-Stack Engineer (TypeScript + JavaScript + C#)

Company DescriptionWe are Software Mind, an awesome team of engineers who are ready to ramp up any top-notch company’s projects! Our aim? To always be one step ahead. Become part of a multicultural company in constant growth with an excellent work environment certified by Great Place To Work!Job DescriptionWe are currently looking for a skilled Senior Full-Stack Engineer to join our dynamic team and collaborate with a leading legal technology client focused on modernizing and maintaining large-scale frontend and .NET platforms.This is a highly technical role centered on dependency modernization across TypeScript, JavaScript, and C# applications. The ideal candidate brings extensive experience managing large-scale upgrade initiatives, handling breaking changes, and maintaining production-grade systems across modern and legacy environments.As a senior member of the engineering team, you will serve as a technical leader for frontend and .NET dependency tracks, collaborating with platform teams and driving engineering excellence through high-quality delivery practices.Expectations – the experience you need8+ years of development experience with strong production-grade proficiency in TypeScript, JavaScript, and C# (.NET).Deep expertise with the NPM and Yarn ecosystem, including lock files, peer dependencies, and monorepos.Experience managing major version upgrades and handling breaking changes.Strong knowledge of frontend build tooling such as Webpack, Vite, or ESBuild.Expert knowledge of NuGet package management and dependency resolution.Experience with .NET Framework to .NET Core and .NET 6+ migration scenarios.Familiarity with Docker and containerized applications.Strong documentation practices and pull request discipline.Ability to work independently across multiple teams and repositories.Nice to haveExperience with React.Experience with New Relic agent configurations.Familiarity with AWS CodePipeline or similar CI/CD solutions.Experience in SOX-compliant or restricted-access environments.Previous experience with large-scale modernization or technical debt reduction initiatives.What You Will DoLead dependency audits and upgrades across TypeScript and JavaScript repositories.Manage breaking changes and ensure build stability.Lead NuGet package upgrades and .NET runtime assessments.Upgrade observability tooling across browser, Node, and .NET services.Maintain Docker images for frontend and backend-for-frontend services.Define quality standards and validation processes for upgrade initiatives.Identify and mitigate dependency risks before they affect production.Work across modern TypeScript applications and legacy JavaScript codebases.Collaborate with platform and engineering teams to drive successful modernization efforts.Contribute to engineering best practices and maintain high standards across the software platform.IMPORTANT: This opportunity is a 3-month commitment.