Source Job

$111,979–$166,500/yr
US

  • Design and build new features and enhancements for global ticketing platforms.
  • Optimize performance in scaling applications to handle massive spikes in traffic.
  • Create services that power the core of infrastructure, implementing APIs and features.

C# .NET AWS SQL API

20 jobs similar to Sr. Software Engineer - Core Platform

Jobs ranked by similarity.

$175,000–$210,000/yr
US

  • Partner with the technical lead and architect to lead the implementation of Trading Platform projects.
  • Deliver backend features end‑to‑end in C#/.NET, from design through production, with accountability for performance and availability.
  • Contribute to shared patterns for .NET service design, API contracts, and performance practices.

Topstep is an engaging working environment which ranges from fully remote to hybrid. They foster a culture of collaboration with cameras on during meetings and a robust Slack environment for communication.

$135,000–$162,000/yr
US

  • Design, build, and maintain backend services using modern dotnet.
  • Implement and evolve APIs (REST and GraphQL) for internal tools, AI agents, and client-facing features.
  • Build event-driven, cloud-native services on AWS.

FirmPilot builds AI-powered systems that automate and scale real-world business outcomes for law firms. It is a young, remote-first company focused on building durable, production-grade software with strong communication, ownership, and shared standards.

South Africa

  • Strengthening and scaling our microservices architecture.
  • Simplifying and consolidating our system landscape.
  • Migrating selected functionality from our existing PIM system into the CIP back-office platform.

I am unable to provide a company description based on the information given. Please provide the company website or more information about the company.

$105,000–$130,000/yr
US

  • Genuinely excited about technology and continuous learning.
  • Thrives in environments where knowledge is openly shared.
  • Part of the "Titles and Metadata" organization, building global solutions for NBCU's expansive catalogue.

NBCUniversal is a leading media and entertainment company creating world-class content across film, television, and streaming. They bring content to life through global theme park destinations, consumer products, and experiences, championing an inclusive culture and developing a talented workforce.

US

  • Analyze and decompose complex user stories into manageable tasks.
  • Craft high-quality, scalable, and secure code.
  • Identify, troubleshoot, and enhance existing software solutions.

BHG Financial provides financial solutions to accomplished professionals, small businesses, and institutions. They have firmly established its legacy as a leader in the financial services space and are dedicated to helping clients build upon their success.

5w PTO

  • Architect, design, and implement scalable and maintainable software applications.
  • Collaborate with cross-functional teams to deliver high-quality software solutions.
  • Write clean, efficient, and well-documented code in C#/.NET.

ApprovalMax is award-winning B2B software used by businesses around the world to approve bills and expenses. It streamlines the approval process for decision-makers by replacing paper and email approvals with automated workflows. The company is globally recognized.

  • Develop, maintain, and evolve REST APIs using .NET Core 8
  • Maintain and improve legacy .NET Framework codebases
  • Contribute to new features using React

Oowlish is a rapidly expanding software development company in Latin America. They are committed to creating a nurturing work environment and are recognized as a Great Place to Work, offering opportunities for professional development and growth.

$90,000–$110,000/yr
Global Unlimited PTO

  • Work with a team of talented engineers to build web applications.
  • Collaborate in distributed cross-functional teams in multiple geographic locations.
  • Improve engineering standards, tooling, and processes.

Bullhorn's core purpose is to create an incredible customer experience, and they focus on delivering high quality products/services. They are a founder-led company headquartered in Boston that employs 1,400 people across 14 countries. They have a people-first culture.

Europe

  • Build, deploy, and maintain Sitecore-based web platforms and AWS-powered applications.
  • Develop scalable services, integrations, and localized solutions using modern cloud, event-driven, and serverless technologies within enterprise environments.
  • Work on building reliable, secure, and scalable systems that help companies maintain operational resilience and respond effectively to critical events.

Software Mind develops solutions that make an impact for companies around the globe. They are building cross-functional engineering teams that take ownership and crave more and their culture embraces openness, acts with respect, shows grit & guts and combines employment with enjoyment.

US

  • Designing and implementing highly reliable components for our business-critical applications.
  • Working closely with engineering leadership and key stakeholders to build new features to address business-critical needs.
  • Translating high-level business needs into actionable engineering requirements.

AWL (All Web Leads, Inc.) helps customers acquire customers for the US insurance industry. Our team of nearly 1,000 talented professionals uses internet marketing strategies to turn consumer interest in insurance products into policy sales. We foster a vibrant, dynamic work culture built on trust, data, technology, passion, collaboration, and winning, where employees want to engage and be impactful.

US

  • Lead, collaborate, and coordinate with developers, managers, and analysts from other teams to design and implement integrations.
  • Analyze and improve existing system integration as well as migration techniques.
  • Architect, design, and implement integrations with an enterprise focus, utilizing the right approach for the right use case.

Lifeway allows you to bring your faith and work experience to join in the most important mission in the world: making disciples of Jesus Christ. They have a strong Work from Anywhere culture that is deeply focused on their mission and values.

US

  • Design, develop, and optimize responsive and interactive user interfaces.
  • Build and maintain robust APIs and backend logic using C#, .NET Framework, .NET Core, and Azure SQL Server.
  • Implement and advocate for industry best practices in coding, security, design patterns, and system architecture.

Drips enables brands to connect with consumers through AI-powered, Conversational Texting®. Backed by a proprietary natural language processing model, their platform has handled over half a billion humanized conversations to date. Every member of the Drips team has a direct impact on their company!

$68,828–$79,671/yr
North America 5w PTO 8w maternity 4w paternity

  • Lead the implementation of new features and enhancements on existing products, demonstrating ownership and expertise.
  • Design, develop, and maintain front-end applications using modern frameworks (e.g., Angular, React) and best practices.
  • Architect and build scalable, secure APIs to support new features and products.

Bankjoy is a Y Combinator and Bessemer Venture Partner backed FinTech startup that is changing the way community banks and credit unions do business, enabling them to become tech-driven and digital first. As a company, Bankjoy is revolutionizing banking tech infrastructure by leading digital transformation at financial institutions.

$125,000–$150,000/yr
US

  • Design, develop, and maintain applications using Microsoft .NET Framework and .NET Core.
  • Collaborate with cross-functional teams to define, design, and ship new features.
  • Ensure the performance, quality, and responsiveness of applications.

SiriusPoint is a global underwriter of insurance and reinsurance providing solutions to clients and brokers around the world. With approximately $2.8 billion total capital, SiriusPoint’s operating companies have a financial strength rating of A- (Excellent) from AM Best, S&P and Fitch, and A3 from Moody’s, and its culture is one of performance and accountability.

Europe

  • Engineer, design and estimate solutions for new feature requests together with the product team
  • Review pull-requests from others to ensure high quality and maintainable solutions
  • Implement APIs and integrations with external services

Exadel is an AI-first global tech company with 25+ years of engineering leadership. They have 2,000+ team members and 500+ active projects powering Fortune 500 clients, with an ambitious, collaborative, and constantly evolving culture.

4w PTO

  • Developing and implementing new features based on project requirements.
  • Writing, testing, and debugging code for software applications.
  • Troubleshooting and resolving software issues and bugs in a timely manner.

GR8 Tech builds B2B iGaming platforms for operators who play to lead. With 1000+ people across locations and time zones, they help operators build success stories across brands, markets, and geos.

Latin America

  • Design, develop, and maintain full-stack solutions using React.js, Next.js, TypeScript, C#, .NET Core, and ASP.NET MVC.
  • Build and consume RESTful APIs, ensuring scalability, performance, and maintainability.
  • Contribute to the design and evolution of full-stack application architecture.

EX Squared LATAM partners with engineering-driven organizations to design, build, and evolve business-critical digital platforms. They are looking for a senior, hands-on engineer with strong technical judgment, autonomy, and accountability.

US Unlimited PTO

  • Develop, test, and maintain Platform APIs and backend services.
  • Collaborate with Product, Engineering, and Implementation teams to translate business requirements into reliable, maintainable code.
  • Participate in code reviews, sprint ceremonies, and troubleshooting efforts for development and production systems.

Authenticx's mission is to help humans understand humans through their software platform, which is the new standard for humanizing customer interaction data at scale. They channel their passion and talent into helping healthcare leaders listen to their conversational data to deliver value to the enterprise; they value Authenticity, Courage, and Having Fun.

$130,000–$165,000/yr
US

  • Estimate, develop, test, and deploy high-quality C# applications for our clients.
  • Debug, troubleshoot, and optimize the performance of C# applications using a variety of development tools.
  • Lead team efforts on complex projects and drive projects forward via direct, individual contributions.

Livefront helps companies design and build world-class digital products that command attention and inspire joy. They've helped household names and startups create experiences that have reached millions of people, and have a reputation for excellence and giving back to the community by educating, mentoring, and sponsoring.

US Canada UK India Australia New Zealand

  • Collaborate with product management and business stakeholders to deliver SaaS based solutions.
  • Communicate and work effectively with others to create great high quality software.
  • Proactively improve our processes and the design and architecture of our products.

Granicus provides technology that transforms the Govtech industry by connecting governments and constituents. They have served 5,500 federal, state, and local government agencies and over 300 million citizen subscribers, offering cloud-based solutions for communications, government website design, and more.