Source Job

US

  • Lead design and delivery of complex features from ideation to production.
  • Use AI-assisted tools to accelerate delivery while critically validating output.
  • Own and evolve code within your product area, including microservices architecture.

C# .NET Core MS SQL RabbitMQ REST

20 jobs similar to Senior Back End Developer (C#)

Jobs ranked by similarity.

Global

  • Design and scale backend systems that power our consumer facing products.
  • Build and refine APIs that deliver instant, seamless experiences.
  • Collaborate with product, credit/finance, compliance, support, and analytics teams.

Tilt uses machine learning and mobile-first products to assess creditworthiness beyond credit scores, with millions of customers worldwide. We value impact, collaboration, and mutual respect, fostering a culture where every voice is heard and brilliant jerks are not welcome.

LATAM Africa Eastern Europe

  • Design, develop, and maintain scalable backend applications and services using C# and .NET/.NET Core.
  • Architect and build enterprise-grade RESTful APIs, and lead cloud engineering initiatives within Microsoft Azure.
  • Mentor junior and mid-level engineers, conduct code reviews, and drive engineering best practices.

A technology solutions company that develops and supports cloud-based software applications for a diverse portfolio of customers. They specialize in building scalable, secure, and reliable software using modern cloud technologies, though the team size and culture are not specified.

Global

  • Design, develop, test, and deploy .NET solutions for REST APIs and web applications.
  • Work on APIs that support various parts of the business and participate in code reviews.
  • Work on spikes to define new features and help the product team.

Celara is a software company focused on building enterprise restaurant technology. Their technology team is a rapidly growing group of talented engineers in a fast-paced, entrepreneurial environment.

Latin America

  • Lead architectural direction and technical governance for enterprise-grade backend services.
  • Build and maintain high-performance RESTful APIs and microservices using C# and .NET 6+.
  • Collaborate with US-based stakeholders to translate business requirements into modern technical solutions.

CodeRoad provides end-to-end software development services, helping businesses scale with ideal infrastructure solutions. They offer nearshore technology services to empower businesses in an evolving digital landscape.

US

  • Design, build, and ship full-stack features across a new cloud-native compliance platform.
  • Use AI coding agents and maintain CI/CD, observability, and production infrastructure.
  • Work directly with product, QA, and subject-matter experts to turn regulatory requirements into technical decisions.

Systrends is a leading provider of regulatory compliance software for energy professionals. They support roughly 200 customers through over 5,000 filings annually and hold top market positions, backed by Bristlecone Companies.

Colombia 1w PTO

  • Design and build key features and architectural improvements for the platform, end-to-end, using modern .NET technology and architecture.
  • Champion proposals through all phases of the SDLC, from design through production implementation, and drive reliability and observability.
  • Mentor other developers and influence technical direction across teams, facilitating design discussions and representing the team in technical discussions.

Caseware is a Canadian fintech company that has led the global audit and accounting software industry for over 30 years, with more than 500,000 users across 130 countries. They foster a collaborative, inclusive culture with a focus on innovation and work-life balance, and are a growing global SaaS leader.

Eastern Europe

  • Design, develop, and maintain enterprise applications using ASP.NET, .NET Core, and SQL Server.
  • Build and integrate RESTful APIs, deploy on AWS, and use AI-assisted development tools like GitHub Copilot.
  • Provide L3 support, mentor junior developers, and participate in Agile/Scrum ceremonies.

We are a digital product engineering company that builds products, services, and experiences at scale across all devices and mediums. With 18,000+ experts across 39 countries, our work culture is dynamic and non-hierarchical.

United States Unlimited PTO

  • Design and deliver scalable backend systems, APIs, and data solutions using C# .NET, Python, SQL, AWS, and Snowflake.
  • Develop AI-powered features with LLM technologies including RAG, semantic search, and function calling.
  • Optimize PostgreSQL databases and establish CI/CD practices for reliable deployment.

Jobgether uses AI-powered matching to review applications and share top-fitting candidates with hiring companies. The platform focuses on efficient, objective candidate evaluation.

Europe

  • Design, build, and maintain RESTful APIs for distributed multi-tier systems.
  • Apply microservices and SOA principles to design scalable systems and evolve cloud-native architecture.
  • Work with Azure, API management, messaging, and optimize data models using T-SQL.

Exadel is an AI-first global tech company that partners with Fortune 500 clients to deliver AI platforms and digital transformation solutions. With over 2,000 team members and 25+ years of engineering leadership, it fosters a collaborative, ambitious culture.

Australia

  • Lead and mentor a team of developers through regular one-on-ones, performance discussions, and career development planning.
  • Remain highly hands-on by designing, developing, testing, and maintaining production-grade software using .NET, C#, and SQL Server.
  • Drive technical decision-making, architecture discussions, and engineering standards by evaluating trade-offs and choosing pragmatic solutions.

  • Exhibit mastery of the Core team's domain, taking a leading role in designing complex systems and influencing technical direction.
  • Own delivery of large-scale features across teams, ensuring alignment with business objectives.
  • Provide mentorship and technical leadership to engineers, fostering continuous improvement.

Olo is a leading SaaS platform accelerating digital transformation in the restaurant industry, helping customers deliver personalized and profitable guest experiences. With over 800 restaurant brands and 400 integration partners, Olo fosters a culture of innovation and collaboration.

Latin America

  • Design, develop, and maintain scalable, secure, and high-performance SaaS applications using C#, .NET, Angular, and SQL Server.
  • Leverage AI-powered development tools and coding assistants to improve development efficiency and code quality.
  • Collaborate with cross-functional Agile teams, manage source code using Git, and contribute to CI/CD workflows.

We are a leading provider of nearshore staff augmentation services headquartered in New York, delivering top-tier technology solutions to companies of all sizes. Our team of 600+ highly skilled tech professionals, based in Latin America, drives digital disruption by partnering with U.S. companies on their most impactful projects.

US

  • Lead a team of six .NET developers, driving AI-assisted development to accelerate delivery.
  • Manage the application development backlog and release calendar, prioritizing work across multiple entities.
  • Foster a culture of continuous improvement and technical craftsmanship, empowering the team to experiment with AI workflows.

Adaugeo Healthcare Solutions provides collaborative support and corporate oversight to a family-owned healthcare organization including Praxis Health and Interpath Laboratory. With over 50 years of success, the organization thrives on the passion and ingenuity of its people.

Global

  • Lead technical activities in an Agile environment, including estimation, sprint planning, code reviews, and deployments.
  • Own design and delivery of complex features for the DMS platform and API, ensuring scalability and maintainability.
  • Mentor and coach peers while driving architectural decisions and upholding development standards.

Absorb Software is a leading global AI-driven learning platform provider, helping organizations unlock workforce potential through innovative Strategic Learning Systems. Trusted by over 3,300 organizations and 34 million users, the company fosters a collaborative, inclusive culture with a focus on continual learning and growth.

US

  • Develop and maintain analyzer workflow logic within the ECL platform, owning backend processes that drive analyzer operations end-to-end.
  • Implement and extend workflow orchestration, managing analyzer state transitions, operational sequencing, and runtime event handling.
  • Collaborate with integration and QA teams to ensure workflow correctness, reliability, and continuity across analyzer types and edge cases.

Goods & Services is a product design and engineering company solving mission-critical challenges for large enterprises in highly regulated industries like life sciences and financial services. Headquartered in the US with regional development centers in Mexico and the UK, we operate a nearshore model that delivers scalable, culturally aligned solutions.

US Unlimited PTO

  • Build and evolve AidenBot, the core automation engine for Windows endpoint management.
  • Design, implement, and maintain production software in C# and .NET with focus on reliability.
  • Collaborate on technical architecture and deliver end-to-end product capabilities.

Aiden provides a Windows endpoint management platform that automates IT operations. It is a hyper-growth startup with a culture focused on openness, honesty, and transparency where everyone has an equal voice.

  • Design and develop scalable, high-performance .NET applications for travel booking systems.
  • Collaborate with cross-functional teams to drive technical architecture and best practices.
  • Mentor junior engineers and contribute to code reviews and system improvements.

Expedia Group is a travel technology company that powers travel for millions of people worldwide through its portfolio of brands. With a global team of thousands, Expedia fosters a culture of innovation, collaboration, and inclusion.

  • Write production-quality Typescript/React and C#/.NET Core code for a microservices architecture.
  • Provide technical leadership, mentorship, and collaborate with cross-functional teams.
  • Leverage AI-assisted development tools to improve productivity and engineering efficiency.

Ren develops a philanthropic solutions software platform for organizations. The company fosters a collaborative, agile culture with a focus on engineering excellence and continuous improvement.

$114,800–$191,400/yr
US 4w PTO

  • Build and own the agentic harness for AI-driven development, including agent workflows, tool integrations, and evaluation infrastructure.
  • Strengthen backend platform services, particularly authentication and session management, using C#/.NET.
  • Use AI-driven throughput to deliver meaningful increments, gather customer feedback, and iterate until the work makes a difference for nonprofits.

Bloomerang provides a powerful giving platform and support for nonprofits to raise more, recruit more, and retain more. They serve tens of thousands of nonprofits and have a mission-driven culture built on core values of Simplify, Care, and Act.

  • Own architecture and systems design across Core and Service Delivery teams.
  • Drive test automation and CI/CD pipelines for reliable, high-quality delivery.
  • Provide cross-team technical leadership and mentorship for senior engineers.

Panoptyc builds AI-powered loss prevention for the real world, including micromarkets and corporate dining. It is a small team with high ownership, where everyone moves the needle.