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Ensure high reliability and correctness for Lithic’s ledger and orchestrated funds flows. Develop new features to better serve Lithic customers. Lead efforts to improve systems and processes within the team.

Lithic creates card issuing and payment infrastructure for technology companies that just works.

• Architect, build, and test Gusto’s product suite that spans across Payroll, Benefits, HR, Time, Tax Credits, and more.
• Mentor other engineers to help solve some of the hardest technical problems out there in very complex domains and at a large scale.
• Collaborate with Product Management and Design teams to understand customer pain points and iterate to launch daily.

Gusto is on a mission to grow the small business economy by handling payroll, health insurance, 401(k)s, and HR for over 400,000 small businesses.

• Design, build, and optimize high-performance systems in Rust supporting AI data pipelines and evaluation workflows.
• Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control.
• Improve reliability, performance, and safety across existing Rust codebases.

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. They work on real production systems and high-impact research workflows across data, tooling, and infrastructure.

Help architect, ship, and scale products. Work in a small team with big ownership. Make a real impact.

Credit Pulse is building the future of business credit with AI to eliminate risk and power faster growth.

As a Senior Software Engineer at Fluxon, you'll bring products to market while learning and growing with our team. You'll drive end-to-end implementations, collaborating with your team in a dynamic environment. You'll also engage directly with clients to understand business goals and debug production issues.

We are Fluxon, a product development team founded by ex-Googlers and startup founders offering full-cycle software development.

• Design, build, and optimize high-performance systems in Rust supporting AI data pipelines and evaluation workflows
• Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control
• Improve reliability, performance, and safety across existing Rust codebases

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. They work on real production systems and high-impact research workflows across data, tooling, and infrastructure.

• Develop & optimize back-end systems to support the model development lifecycle.
• Design, implement, and maintain secure and scalable APIs for model deployment and integration.
• Collaborate with cross-functional teams to incorporate feature requests and improve offerings.

This position is posted by Jobgether on behalf of a partner company; Jobgether uses AI to ensure applications are reviewed quickly and objectively.

• Take end-to-end ownership of new features, working with others in the SDK and Server teams.
• Design and build Temporal SDKs used by customers to work with Temporal in their programming language of choice.
• Develop features that provide a foundation for the reliable execution of the current wave of agentic AI systems.

Temporal provides an open source programming model that simplifies code and enhances application reliability. They aim to be the reliable foundation of every developer’s toolbox and foster a curious, driven, collaborative, genuine, and humble culture.

• Design, build, and optimize high-performance systems in Rust supporting AI data pipelines and evaluation workflows
• Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control
• Improve reliability, performance, and safety across existing Rust codebases

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. They focus on real production systems and high-impact research workflows across data, tooling, and infrastructure.

• Design, build, and maintain reliable, scalable, and highly available systems.
• Commit to code quality through unit testing, integration testing, and test-driven development.
• Utilize AI development tools like Copilot and Gemini effectively, understanding their limitations.

Glia is the leading AI customer service solution for banks and credit unions, valued at over $1 billion, with 98% employee satisfaction.

• Design, build, and optimize high-performance systems in Rust supporting AI data pipelines and evaluation workflows
• Develop full-stack tooling and backend services for large-scale data annotation , validation, and quality control
• Improve reliability, performance, and safety across existing Rust codebases

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. They did not provide information about the size/employees and culture in the job description.

• Building delightful user interfaces and creating cross-platform client infrastructure on the frontend.
• Creating APIs, data pipelines and services that bridge the gap between the blockchain and the user experience.
• Designing and optimizing systems that ensure Phantom transactions land quickly and consistently across rapidly evolving Solana network conditions.

Phantom is revolutionizing the way millions of people interact with the crypto ecosystem by offering a seamless, unified experience for managing accounts and tokens.

• Build AI agents and tools that transform how developers write code and debug issues.
• Architect and implement AI-powered tools such as code review assistants and automated test generators.
• Collaborate with the Principal Engineer and product/design teams in a remote-first environment.

Docker makes app development easier so developers can focus on what matters.

• Design, develop, and maintain backend services, APIs, and data pipelines that power Knock's customer-facing and internal applications.
• Architect and build scalable backend services using Node.js and TypeScript, ensuring they integrate seamlessly with our frontend experiences.
• Contribute to AI-powered features and initiatives, integrating AI services to enhance our risk analysis and decision-making capabilities.

Knock is redefining the home buying and selling experience. They are a passionate team of industry experts who knew there had to be a better, simpler way for people to navigate the journey between homes and have been honored as one of Inc.’s Best Workplaces six times in the past seven years.

• Lead design activities and participate in building the foundation for API management.
• Define solutions using Service Oriented Architecture (SOA) patterns.
• Develop and implement enterprise-class security systems for production environments.

Experian is a global data and technology company, powering opportunities for people and businesses around the world.

• Define, implement, and document new security features.
• Analyze, fix, and test vulnerabilities in open source software.
• Audit and analyze source code for vulnerabilities.

Canonical is a pioneering tech firm at the forefront of the global move to open source and publishes Ubuntu.

• Design, build, and test the foundation that supports compliant payroll for millions of people.
• Help scale one of the largest Ruby/Rails and TypeScript/React applications in the world.
• Collaborate on complex and ambiguous problems with partnerships from Engineering, Product Management, Design, Data Science, Compliance, Operations, and other cross-functional teams.

Gusto is on a mission to grow the small business economy by handling payroll, health insurance, 401(k)s, and HR. With teams in Denver, San Francisco, and New York, they support more than 400,000 small businesses and are building a workplace that represents and celebrates their customers.

• Build the foundations that power our AI Agents at scale, designing systems for reliability, performance, and change.
• Use modern AI tools in your daily work to explore designs, scaffold code, generate tests, and document decisions.
• Expected to have solid engineering skills - clear contracts, readable code, strong test suites, observability, and maintainable architectures.

At Zowie, we’re revolutionizing how businesses interact with their customers by creating a future where AI Agents handle 100% of customer interactions.

• Design and deliver software solutions that enhance customer experiences and streamline operations.
• Work across the full stack, from database models to user-facing screens, collaborating closely with product, design, and data teams.
• Mentor peers, drive refactoring efforts to reduce technical debt, and ensure high-quality, maintainable code.

This position is posted by Jobgether on behalf of a partner company.

Design, develop, and test high quality software systems using Python or Kotlin. Support product development lifecycle by collaborating with cross-functional teams. Independently identify the right solutions to solve ambiguous, open-ended problems.

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest.