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20 jobs similar to Sr. Software Developer – Application Migration & Modernization

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Brazil

  • Design, develop, and deploy full-stack applications using React, C#, .NET Core, and Python on AWS.
  • Collaborate in an Agile environment to modernize legacy systems, build integrations, and improve application performance.
  • Leverage AI-assisted development tools and DevOps practices to accelerate delivery and maintain code quality.

We are a technology company building scalable, secure applications for a global platform. Our collaborative engineering team works remotely, using modern tools and Agile practices to deliver high-quality software.

Brazil

  • Develop, maintain, and secure enterprise applications using C#, .NET, ASP.NET Core, and SQL Server.
  • Optimize database performance and implement secure coding practices to mitigate vulnerabilities like SQL injection and XSS.
  • Collaborate on code reviews, automated testing, and security checks integrated into CI/CD pipelines to support compliance and audit requirements.

Brazil Security & IT is an IT services company specializing in secure development and database optimization. They maintain a quality-focused, remote-first culture with opportunities in AppSec and DevSecOps.

Brazil

  • Design, develop, and optimize backend services and APIs using C#, .NET Core, and .NET 8.
  • Work with microservices, Docker, Kubernetes, and Google Cloud Platform to ensure scalability and reliability.
  • Drive observability with Dynatrace, maintain automated tests, and collaborate in an Agile remote environment.

The company builds scalable digital solutions and drives digital transformation across multiple industries. It fosters a collaborative and inclusive culture focused on transparency, trust, innovation, and professional development.

Europe

  • Develop and maintain scalable enterprise applications using C#, .NET Core, and ASP.NET Core.
  • Build backend services, RESTful APIs, and microservices with secure coding and performance optimization.
  • Collaborate with cross-functional teams in an Agile environment using Azure DevOps and CI/CD pipelines.

The company focuses on developing scalable enterprise applications and supporting digital transformation. It fosters a dynamic, collaborative, Agile environment with an emphasis on modern Microsoft technologies and continuous improvement.

Canada

  • Design, code, test, and maintain components of an on-premises enterprise software product using C#/.NET.
  • Champion AI-assisted development, establishing best practices for AI coding agents and agentic workflows.
  • Collaborate with cross-functional teams in an Agile/SCRUM environment, mentoring others in secure AI tool usage.

Quest Software helps organizations secure, manage, monitor, protect, and analyze their IT infrastructure and data. Trusted by over 45,000 companies including 90% of the Fortune 500, Quest fosters a collaborative, innovative culture focused on practical technology solutions.

Brazil

  • Work across multiple development squads to support technical decisions and drive platform evolution.
  • Partner with Tech Leads and Architecture teams to define engineering standards and reusable solutions.
  • Promote generative AI tools and automation to accelerate coding, testing, documentation, and code reviews.

Jobgether is an AI-powered job matching platform that connects candidates with hiring companies through an objective review process. The platform uses artificial intelligence to shortlist top-fitting candidates and shares them directly with employers, emphasizing innovation and fairness in hiring.

Brazil

  • Design, build and evolve scalable, secure backend services using a modern .NET stack and RESTful APIs.
  • Apply Clean Architecture, SOLID and KISS principles to keep code modular, reusable and simple.
  • Build event-driven integrations, work with databases, and contribute to CI/CD, testing and code reviews.

CI&T helps large enterprises transform AI into real business impact with AI deployment, AI-native execution, and tech-integrated business solutions. With 8,000 employees across more than 25 countries, they collaborate to build impactful solutions in a multicultural, fast-moving environment.

Brazil

  • Develop and maintain backend services using C# and .NET within a fully remote team.
  • Collaborate with stakeholders to analyze requirements and deliver effective technical solutions.
  • Work with SQL databases, APIs, and version control while following software quality standards.

A partner company in the fitness industry is hiring a junior backend developer for its technology team. The company fosters a collaborative, growth-oriented environment with ongoing learning and mentorship opportunities.

Europe

  • Building a reusable application platform with shared components and common development patterns.
  • Migrating existing business functionality while maintaining functional parity and documenting complex business rules.
  • Delivering incremental releases supported by automated testing, UAT, and post-release stabilization.

Xebia is a global AI-first digital transformation and engineering partner specializing in AI, data, cloud, and digital products. With over 25 years of experience, the company has 5,000 professionals across 16 countries and a people-first culture focused on engineering excellence.

Brazil

  • Develop and ship features for a prepaid card and payments platform using C#/.NET, Azure, React, React Native, and Angular.
  • Use Claude Code and AI-assisted development to accelerate implementation, while reviewing code and debugging issues across the stack.
  • Ensure financial transactions and sensitive data remain secure through rigorous testing, code review, and production ownership.

This company builds reliable, modern business systems and payment solutions for growing companies. The team is remote-first and values AI-assisted development, learning, and flexibility.

UK

  • Design and build backend services and APIs in C# and .NET/.NET Core, taking ownership of technical decisions.
  • Mentor and support less experienced engineers through code review, pairing, and technical guidance.
  • Champion engineering best practice, clean code, and thorough testing within cross-functional scrum teams.

CreateFuture is an AI-native consulting partner that builds digital products and services for clients like PayPal, adidas, NatWest, and FanDuel. With over 600 employees, the company values craft, quality, and a people-first culture.

4w PTO

  • Design and develop applications and APIs using .NET/C# and modern architecture.
  • Build, deploy, and manage services on Microsoft Azure and optimize SQL Server databases.
  • Leverage agentic AI coding tools and mentor developers to raise engineering standards.

Fragomen is the leading global immigration law firm with more than 6,000 professionals in nearly 70 offices across the Americas, EMEA and Asia Pacific. The firm helps corporations and individuals navigate global mobility and is committed to diversity, inclusion, and innovation.

Saudi Arabia

  • Develop and maintain software applications using C#, .NET, and ASP.NET Core.
  • Build and support RESTful APIs and backend services in a remote-first environment.
  • Troubleshoot technical issues, provide production support, and contribute to CI/CD practices.

Brazil Unlimited PTO

  • Architect and evolve scalable backend systems using Scala, Play Framework, PostgreSQL, Redis, and AWS.
  • Build and maintain modern frontend experiences using React, Redux, Chakra UI, and related tools.
  • Drive AI-native engineering workflows, leveraging Claude Code and Codex to deliver high-quality features.

They build an AI-native SaaS platform that helps organizations automate workflows, strengthen compliance, and improve operational efficiency. The company is a remote-first, collaborative engineering team that values autonomy, experimentation, and continuous improvement.

Brazil

  • Build and evolve scalable backend services and APIs using C#, .NET, and Azure technologies.
  • Collaborate on cloud-native applications and distributed systems with event-driven architectures.
  • Apply engineering best practices across development, testing, deployment, and monitoring for high-quality software.

CI&T helps large enterprises harness AI to drive business impact through AI deployment, modernization, and tech-integrated solutions. With 8,000 employees across 25 countries, the company fosters a collaborative culture focused on innovation and continuous learning.

Brazil

  • Develop and maintain backend services using C#, ASP.NET Core, and Entity Framework Core.
  • Build and integrate RESTful APIs and modern frontend applications with Next.js, React, and TypeScript.
  • Collaborate with clients and cross-functional teams in an Agile environment to deliver reliable tested solutions.

Partner company developing an education platform that helps professionals access, understand, and use data related to programs and accreditation. The company fosters an Agile, collaborative environment focused on meaningful impact in education.

Brazil

  • Develop full-stack applications using React, TypeScript, C#, and .NET.
  • Design secure REST APIs and reliable backend systems with SQL Server integration.
  • Mentor junior engineers and leverage AI-powered tools to improve productivity.

Our partner modernizes financial services through innovative digital solutions. They foster a collaborative, remote-first culture with an internationally distributed engineering team.

$90,000–$100,000/yr
US

  • Implement core features for the new auction platform, covering inventory management, financial transactions, and customer management.
  • Collaborate with engineers, product managers, and other teams to turn business requirements into maintainable, scalable software.
  • Develop high-quality C# code, design efficient data models, build CI/CD pipelines, and integrate with Azure services and third-party systems.

OnTrac is a logistics and delivery services company. It is supporting a large wholesale digital-marketplace customer through a contractor program to modernize their auction platform.

$115,000–$130,000/yr
US

  • Design, develop, and maintain core billing and invoicing systems using C# and PHP.
  • Use AI-assisted development tools like Claude and Cursor to accelerate delivery and improve quality.
  • Mentor other engineers and lead technical decisions to keep systems reliable, secure, and scalable.

Global leader in payment technologies, NMI lets software and sales professionals deliver payment innovations. The company values kindness, integrity, and continuous improvement, and supports a remote-first culture.

Latin America Europe

  • Build and evolve scalable, secure, and high-performing full-stack applications using .NET, C#, React, Redux, and JavaScript.
  • Design, implement, and maintain CI/CD pipelines and cloud-based solutions on Google Cloud Platform.
  • Mentor junior engineers, contribute to architecture decisions, and promote high code quality standards.

The partner company builds scalable, secure, and high-performing full-stack applications for clients. They foster a collaborative, remote-first engineering culture with an international team of technology professionals.