Source Job

  • Build and evolve the core payment platform, designing new services and integrations from architecture to production.
  • Improve transaction processing, routing, and webhook infrastructure while participating in technical decisions.
  • Work closely with the Connector team and review code to maintain high engineering standards.

.NET C# Kafka PostgreSQL Docker

20 jobs similar to Senior .NET Engineer (Payment Platform)

Jobs ranked by similarity.

$155,000–$200,000/yr
United States

  • Design and build services and APIs that power core trading platform capabilities.
  • Own features end-to-end from technical design through production deployment and monitoring.
  • Contribute to system architecture decisions and mentor engineers.

Topstep builds a trading platform that powers real-time trading and market data delivery for thousands of active traders. The company fosters a collaborative culture with a fully remote to hybrid working environment.

$175,000–$250,000/yr
North America

  • Design and build scalable, secure backend services using C# and TypeScript, with expertise in PostgreSQL, Docker, Kubernetes, and AWS.
  • Mentor junior engineers and collaborate with cross-functional teams to define requirements and deliver platform solutions.
  • Stay current with emerging technologies, optimize system performance, and implement security best practices.

Later is an AI-powered influencer marketing platform that helps brands create campaigns by combining real creator relationships and data-driven insights. The company is trusted by leading enterprise brands and fosters a culture of inclusion, ownership, and continuous learning.

  • 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.

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.

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.

Europe

  • You'll design and build scalable, distributed systems using .NET and C# in a cross-functional team.
  • You'll collaborate with product managers, designers, and engineers to ship features that matter to hundreds of thousands of businesses.
  • You'll take ownership of outcomes, from code quality to customer impact, in a regulated financial environment.

Finom is a European tech startup headquartered in Amsterdam, developing an all-in-one financial B2B solution that integrates banking, accounting, and invoicing. With a recent €115 million Series C round and a start-up culture, Finom empowers employees to make a real difference in a collaborative, innovation-driven environment.

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.

Europe

  • Lead a team of backend engineers in designing, developing, and delivering new loan origination, compliance, and pricing systems that power M-KOPA's expansion across Africa.
  • Set architectural direction and partner with Product Managers on roadmap planning and prioritisation, ensuring high-quality software delivery.
  • Foster a true DevOps culture, with infrastructure as code, observability, automated testing, and continuous delivery as first-order concerns.

M-KOPA is a FinTech company that creates financial inclusion for the traditionally excluded through a fair, flexible, customer-centric financing model. The company has served over 7 million customers and unlocked more than $1.5 billion in cumulative credit, and has been recognized by the Financial Times as one of Africa's fastest-growing companies for five consecutive years.

India

  • Design, develop, and maintain scalable cloud-native applications using .NET and AWS technologies.
  • Build event-driven architectures and RESTful APIs with microservices in a distributed environment.
  • Collaborate with cross-functional teams in an Agile environment to deliver high-quality software 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.

Canada

  • Lead the design and development of scalable distributed systems for digital banking platforms.
  • Architect integrations between banking, payment, and identity systems.
  • Mentor senior engineers and drive engineering best practices in a cloud-native environment.

Our partner is a financial technology company building next-generation digital banking platforms. They seek a principal engineer to join their collaborative engineering team, though specific company size is not mentioned.

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.

Colombia 1w PTO

  • Define and evolve technical architecture, establishing standards for safe, scalable, and reusable capabilities across teams.
  • Act as a technical leader across teams, influencing architectural decisions through design reviews, RFCs, and hands-on collaboration.
  • Own key features and architectural improvements end-to-end, from design through build, using modern, leading-edge technology.

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. The company fosters a collaborative, inclusive culture with a focus on innovation and growth, employing a global team that values many voices as one team.

Global Unlimited PTO

  • Collaborate as a member of software development teams to deliver production-ready client solutions with an initial focus on .NET modernization.
  • Work with the Lead Architect to review technical requirements, contribute to technical decision making, and deliver working software to clients.
  • Participate in discovery sessions to gather customer requirements and follow architecture decisions to adhere to solution design.

Caylent is an AI-first cloud services company that helps organizations turn ambitious ideas into meaningful business impact. As an AWS Premier Tier Services Partner, we have a fully remote global team across Canada, the United States, and Latin America, fostering a culture of technological curiosity.

Global

  • Build and scale the systems and services that form the foundation of Alpaca's global payments and treasury platform.
  • Operate in an industry where money movement is critical, using modern, event-driven, and highly scalable architectures.
  • Collaborate with a distributed team to design and implement solutions with autonomy, focusing on quality and resilience.

Alpaca is a US-headquartered self-clearing broker-dealer and brokerage infrastructure for stocks, ETFs, options, crypto, fixed income, and more. Our global team of 380+ members values curiosity, empathy, and accountability.

$150,000–$190,000/yr
US

  • Design and build a real-time notification platform for low-latency alerts and account updates.
  • Build and operate Kafka/MSK streaming pipelines for live trading data ingestion.
  • Develop stateful stream processing applications for risk detection and fraud monitoring.

Take Profit Trader is a high-growth proprietary trading firm handling hundreds of millions of dollars in trading volume. They are dedicated to innovation, operational excellence, and empowering traders globally.

Global

  • Design and build cloud-native applications using Microsoft .NET and Azure.
  • Develop event-driven architectures with Azure Service Bus and Event Hub.
  • Ensure code quality through automated testing, code reviews, and CI/CD pipelines.

Software Mind develops solutions for global companies. They build cross-functional engineering teams and embrace openness, respect, grit, enjoyment, and growth.

$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.

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.