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20 jobs similar to Freelance Senior Full Stack Software Architect and Collateral Management Specialist

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US

  • Ship high quality, well tested, secure, and maintainable code.
  • Work individually or mentor a small group in an Agile development environment.
  • Participate in discussions about project architecture and technical feasibility; make decisions and justify your development approach.

Affinitiv is the largest provider of end-to-end, data-driven marketing and software solutions exclusively focused on the automotive customer lifecycle. They work with over 6,500 dealerships and every major manufacturer in the country and pride themselves on being the go-to experts in the industry.

$146,000–$234,000/yr
US

  • Own and define the product vision, strategy, and multi‑year roadmap for systems supporting background investigations, case lifecycle management, adjudicative workflows, and continuous vetting capabilities.
  • Translate evolving DCSA and DHS requirements, industry standards, SEAD policies, and mission directives into actionable technical specifications, user stories, and architectural priorities.
  • Plan, direct, and coordinate multi‑team development of mission‑critical applications using Angular, C#, ASP.NET, .NET Framework, SQL Server, ETL/SSIS, and SSRS, ensuring scalable, secure, and compliant solutions.

Peraton is a next-generation national security company that drives missions of consequence spanning the globe. As a mission capability integrator and transformative enterprise IT provider, they deliver solutions to protect our nation, supporting government agencies and every branch of the U.S. armed forces.

$185,000–$210,000/yr
US

  • Own engineering delivery, maintenance, and production operations responsibilities.
  • Drive modernization and platform evolution, including cloud and architectural improvements.
  • Partner with Product, Architecture, and Data/AI stakeholders to deliver high-impact AI use cases.

HHAeXchange provides healthcare software solutions. It supports post-acute payers and providers seeking ways to deliver service to patients while maintaining compliance, with a focus on innovation and cost-effectiveness.

Canada

  • This is a full-stack Senior Developer role with a backend lean.
  • Investigate problems, propose solutions, scope your own work in collaboration with Product and QA, and ship.
  • Advisor-facing feature enhancements across existing ADX — payment workflows, service configuration, quoting and booking improvements.

TripArc, founded in 2017, is a $750 million privately held company that powers the top Travel Agencies and Tour Operators in North America. It has an expansive and growing network empowering seamless access to a comprehensive range of travel options and services globally, with over $750 million in transactions annually.

$115,747–$208,344/yr
US 4w PTO

  • Lead design and architecture discussions for complex backend systems
  • Mentor junior and mid-level developers, promoting best practices in coding and testing
  • Manage critical components of the application lifecycle, from design through deployment

Experian is a global data and technology company, powering opportunities for people and businesses around the world. A FTSE 100 Index company listed on the London Stock Exchange, they have a team of 23,300 people across 32 countries and corporate headquarters in Dublin, Ireland.

Latin America

  • Develop new functionalities in critical applications.
  • Ensure applications meet architecture and security standards.
  • Participate in requirements analysis and propose technical solutions.

Tekton Labs is a technology consulting and software development company, founded in Silicon Valley, with offices in Peru, Mexico, and the United States. They have 15 years of experience designing and developing innovative solutions to help companies achieve their objectives.

US

  • Lead the design and development of scalable, secure applications across the stack.
  • Design and build architecture that supports AI/ML-powered features across user-facing and API surfaces.
  • Drive initiatives end-to-end—from ideation and planning to execution.

GoodLeap is a technology company delivering financing and software products for sustainable solutions. Over 1 million homeowners have benefited from their technology. Thousands of professionals rely on GoodLeap’s AI-powered applications and developer tools to drive transparent communication, deeper business intelligence, and streamlined payment and operations.

Canada

  • Architect, write, and maintain reusable, testable, and efficient code.
  • Lead front-end (Vue/Vuex) and back-end (.NET) development, setting patterns and standards for the team.
  • Lead, mentor, and grow a team of 3–4 developers, providing technical direction, code review, and career guidance.

Fleetworthy provides fleet readiness technology, uniting safety and compliance, toll management, and weigh station bypass solutions. They are trusted by 75% of the top fleets in North America and are shaping the future of fleet readiness with AI-enabled technology.

Global

  • Design, develop, and maintain complex .NET-based applications
  • Collaborate with cross-functional teams including engineers, QA, and domain experts
  • Implement secure, scalable, and efficient solutions aligned with healthcare industry standards

They create innovative solutions for global customers, delivering high-quality software that meets the highest industry standards. Joining them means working in a supportive environment with flexible arrangements and opportunities for professional growth.

  • Design, develop, and maintain scalable and high-performance backend systems using .NET technologies
  • Contribute to system architecture decisions and lead the design of microservices-based solutions
  • Build and maintain RESTful APIs and ensure high availability and performance

Commencis has more than two decades of expertise in experience design, software engineering and cloud technologies. Their products and solutions are used by leading brands in financial services, insurance, airlines and retail in more than 20 countries. They value collaboration, curiosity, and an open mindset at work.

$120,000–$135,000/yr
US

  • Design, implement, and maintain reliable systems for processing payments, scheduling payouts, and reconciling transactions.
  • Collaborate with Finance, Compliance, and Product teams to build features that meet regulatory, tax, and reporting requirements
  • Architect systems for auditability, security, and fault tolerance across distributed services

VERSANT is a leading force in news, sports and entertainment - home to iconic and trusted brands that inspire, inform, and delight audiences. They are an industry-changing media company fueled by innovation and an entrepreneurial spirit.

US

  • Lead the Architecture and Development of full-stack applications that align with EDC’s AI & Digital Transformation strategy and drive high-priority business outcomes.
  • Establish and steward engineering standards for cloud-native, API-First, and AI-enabled development, including CI/CD practices, testing patterns, observability, and security.
  • Define and implement modular “Lego-block” architectures that are reusable and interoperable across business development, programmatic, and core business systems through API-first, cloud-native solutions.

Education Development Center (EDC) is a global nonprofit that works with partners to advance every person’s journey to learn, work, and be well. For more than 65 years, EDC has partnered with communities, governments, and private sector to improve education, workforce development and health outcomes. EDC brings together a global team working across the United States and around the world.

US Unlimited PTO

  • Build, maintain, and improve APIs and services powering public-facing applications
  • Deliver performant, reliable backend solutions aligned to product requirements
  • Drive backend architecture and API design decisions that improve scalability, resiliency, and maintainability

PlayOn is a dynamic growth-stage company dedicated to championing the spirit of play in the high school space. Backed by KKR, their family of brands empowers schools with innovative solutions and exceptional service. Their culture is built on accountability, collaboration, growth, and fairness.

Spain 0w PTO

  • Own the design, development, testing, deployment, and ongoing support of major Vantage platform features and services.
  • Ensure high code quality, performance, and maintainability across the Vantage codebase through rigorous code reviews.
  • Partner closely with product management, ML engineering, cloud architecture, and UX teams to define and deliver capabilities.

ABBYY is a trusted partner for purpose-built AI and intelligent automation, solving complex problems for enterprise customers. They put information to work to transform business processes, serving over 10,000 customers, including many Fortune 500 companies, with a global team of 600+ colleagues across 15 countries.

$176,000–$200,000/yr
US

  • Leads the architecture, design, and implementation of complex software systems.
  • Writes, reviews, and approves code using current programming languages and technologies.
  • Champions secure software development practices, ensuring solutions meet security standards.

Hanger, Inc. is the world's premier provider of orthotic and prosthetic (O&P) services and products, offering the most advanced O&P solutions, clinically differentiated programs and unsurpassed customer service. Hanger's vision is to lead the orthotic and prosthetic markets by providing superior patient care, outcomes, services and value.

US Unlimited PTO

  • Design, develop, and maintain cloud-native applications using .NET Framework and Azure services.
  • Develop and deploy applications using Azure App Services, Azure SQL Managed Instance, and Azure Container Apps.
  • Create responsive and user-friendly UI using Telerik components and implement reporting solutions with Telerik Reporting Services.

Interra Health is a fast-growing healthcare technology company transforming how providers and patients navigate the prescription journey. It delivers trusted eligibility, real-time coverage and pricing insights and offers the chance to join an innovative, mission-driven team to improve access, and make the healthcare experience better.

$140,000–$160,000/yr

  • Drive the design, implementation, and maintenance of APIs and microservices.
  • Gain hands-on expertise in frontend with Angular and backend with Go.
  • Mentor fellow software engineers, fostering a culture of collaboration and technical excellence.

HHAeXchange is a leading tech platform for home and community-based care. Founded in 2008, they focus on creating an end-to-end homecare solution to help people who are aging or have disabilities thrive in their homes and communities.

Europe

  • Develop and own solutions that add value across systems while balancing technical debt.
  • Collaborate closely with engineers, product owners, and other stakeholders to align on optimal solutions that meet product goals.
  • Lead in fostering a Test First mentality and emphasize quality at the code level.

Cision is a global leader in PR, marketing, and social media management technology and intelligence, helping brands connect with customers. They have offices in 24 countries and are committed to fostering an inclusive environment where employees can be their authentic selves.

US

  • Design, develop, and maintain reliable, scalable, and secure full-stack solutions.
  • Lead the design and implementation of scalable and maintainable back-end systems, ensuring alignment with business requirements and technical standards.
  • Write efficient and maintainable code using .NET technologies, following best practices for software development, including test-driven development and continuous integration.

Evry Health's mission is to bring humanity to health insurance with high-technology health plans that expand benefits, increase access/transparency and feature a personalized, human approach, ensuring members live happier, healthier lives. They are the major medical division of Globe Life (NYSE:GL), which has 16.8 million policies in force, and more than 3,000 corporate employees and 15,000 agents.

US

  • Design, develop, test, and deploy scalable full‑stack web applications using C# and .NET Core
  • Build and maintain RESTful APIs and backend services supporting enterprise and operational use cases
  • Contribute to the modernization and migration of legacy applications to Azure PaaS or private cloud environments

Pyrovio Consulting is a technology and management consulting firm. We partner with utilities, energy companies, and capital‑intensive organizations to modernize digital platforms, improve delivery outcomes, and enable long‑term operational excellence.