Source Job

$405,000–$485,000/yr
US

  • Define and drive multi-year technical strategy for the Claude API.
  • Identify and personally lead the highest-complexity, highest-impact engineering initiatives spanning multiple teams.
  • Serve as the primary technical decision-maker for major architectural decisions with org-wide scope.

Python TypeScript FastAPI React Kubernetes

20 jobs similar to Senior Staff Software Engineer, API

Jobs ranked by similarity.

US

  • Analyze requirements and propose innovative AI-native solutions to technical problems
  • Write clean scalable code
  • Test and deploy features & services

WorkHero is building the AI-powered back office for the skilled trades, starting with the $50B+ HVAC industry. They have exciting traction and just closed a $5M seed round to expand their engineering and product organization, as well as add additional services.

$155,000–$185,000/yr
US Unlimited PTO

  • Lead the technical vision and execution for complex, cross-product initiatives.
  • Be a principal contributor on scalable backend systems, distributed architecture, and real-time data platforms.
  • Influence technical strategy, champion engineering excellence, and drive high-impact delivery across multiple teams.

Impiricus is an AI-powered HCP Engagement Engine that transforms how life sciences companies support physicians. Named the #1 fastest growing company in North America in 2025, they ethically connect HCPs to pharma resources to reduce go-to-market costs.

US

  • Define and evolve the technical vision for AI and agentic systems across products.
  • Design orchestration, data, and serving patterns that handle global scale with reliability.
  • Collaborate with AI Research to turn prototypes into extensible, governed production frameworks.

KnowBe4 is a cybersecurity company that puts security first, empowering over 70,000 organizations worldwide to strengthen their security culture. They value radical transparency, extreme ownership, and continuous professional development in a welcoming workplace that encourages all employees to be themselves.

$140,000–$180,000/yr
US

  • Participate in the decisions on “how” we deliver software.
  • Partner on the “what, when, who and why” of our software with Design and Product.
  • Lead a major feature or application and support junior engineering talent with mentorship and/or technical guidance.

Nooks is pioneering Classified Infrastructure-as-a-Service (CIaaS) to provide government and industry partners with the fastest, most efficient access to classified infrastructure. As a startup, they are offering a limited-time opportunity to be an equity owner in a pioneering new industry and they value innovation, collaboration, and a service-first mindset.

  • Be the go-to escalation point for technical support inquiries—diagnosing issues across customer setup, LangChain products, and deployment issues.
  • Work directly with engineering, operations, documentation, and product teams to resolve bugs, suggest patches, and advocate for customer needs.
  • Partner with Deployed Engineering to support critical enterprise customers.

LangChain's mission is to make intelligent agents ubiquitous, helping developers build mission-critical AI applications across the entire agent development lifecycle. Founded in 2023, LangChain powers top engineering teams at companies like Replit, Lovable, Clay, Klarna, LinkedIn, and more.

Latin America

  • Design and build high-performance, secure, and well-documented code that integrate with an ecosystem of existing services and apps.
  • Diagnose and optimize system bottlenecks, ensuring high availability and low-latency performance across large-scale workloads.
  • Leverage AWS services, Kubernetes and modern DevOps practices to build and deploy production-grade systems at scale.

Marsie connects top-tier engineers from Latin America with leading global teams, embedding experienced engineers into clients’ teams. Their engineers work on complex systems across modern stacks and cloud environments, while enjoying a remote culture built on trust and long-term relationships.

US

  • Drive technical strategy and architectural decisions across multiple teams and stack layers
  • Solve ambiguous, cross-cutting problems that span dashboards, mobile, AI, and backend services
  • Define and champion spec-driven development practices organization-wide

SERHANT. is the most followed real estate brand in the world, calibrated for the marketplace of tomorrow, delivering proven results for buyers, sellers, and developers. SERHANT. revolutionizes the traditional brokerage model by innovating through media and content creation and is powered by a full-service in-house film studio as well as an amplification platform.

US

  • Build and scale the AI Agent platform.
  • Design and implement APIs, services, and infrastructure.
  • Prototype rapidly and continuously improve system performance.

Podium brings AI Employees to local businesses that turn every conversation into revenue. Trusted by 60,000+ businesses, they have crossed $100M in AI Agent ARR, scaling 300% year-over-year and empowering real business outcomes for their customers.

$3,500–$6,500/mo
Latin America 3w PTO

  • Develop and maintain software for our edge devices, server infrastructure, and web applications.
  • Build and improve the APIs connecting our system components (edge, server, web).
  • Design and improve the user interfaces that customers use in our web application.

Glacier is a Series A startup based in San Francisco tackling the problem of trash by building custom sorting robots and using AI-powered business analytics. Their clients range from CPG companies to municipal recycling facilities, and they've been recognized as one of TIME's Best Inventions.

US

  • Design and implement AI-powered features across the full stack.
  • Create robust, scalable APIs that connect ClickHouse's database capabilities with modern AI/ML inference systems.
  • Build responsive, intuitive user interfaces that make complex AI functionalities accessible.

ClickHouse is a real-time analytics data warehouse that leads the market in observability and AI workloads. They have over 3,000 customers and their ARR has grown over 250 percent year over year.

Europe

  • Design and implement AI-powered features across the full stack.
  • Create robust, scalable APIs that connect ClickHouse's database capabilities with modern AI/ML inference systems.
  • Build responsive, intuitive user interfaces that make complex AI functionalities accessible.

ClickHouse is a fast-growing private cloud company, recognized on the 2025 Forbes Cloud 100 list. They lead the market in real-time analytics, data warehousing, observability, and AI workloads with over 3,000 customers and ARR that has grown over 250 percent year over year.

Global

  • Own team-level architecture, delivering strategic and tactical software to address defined problems
  • Influence work outside of your direct team, solving complex problems impacting performance, features, and product design
  • Support and unblock peers through async reviews, pairing, and mentorship

Onebrief provides collaboration and AI-powered workflow software specifically for military staffs, aiming to make their work faster and more efficient. Founded in 2019, their team includes veterans and technologists and they are valued at $2.15B.

Global

  • Design and build robust backend services and microservices that power the DevX platform ecosystem.
  • Integrate Large Language Models (LLMs) and custom AI models to enable features like semantic code search, automated refactoring, and natural language infrastructure provisioning.
  • Act as a technical liaison and co-developer with our India-based engineering team, participating in daily stand-ups and code reviews to ensure architectural alignment.

They are developing the DevX platform, a next-generation engineering platform designed to accelerate time-to-market and improve code quality through intelligence. The company seems to be focused on developer tools and AI-driven solutions to enhance the software development lifecycle.

Global 6w PTO

  • Design and implement backend services for intelligent agent workflows.
  • Develop APIs and orchestration layers in Python and TypeScript.
  • Build scalable systems to support LLM-based reasoning across cloud infrastructure.

Jobgether is a platform that uses AI to match candidates with jobs. They ensure applications are reviewed quickly and fairly by identifying top-fitting candidates for companies.

Europe 6w PTO

  • Designing & building applications using Python.
  • Building and operating agentic systems that power GenAI applications.
  • Supporting component design, development and maintenance.

Nearform is an independent team of data & AI experts, engineers, and designers who build intelligent digital solutions and capability at pace. They create AI-enabled solutions that enhance digital experiences, empower developers, and deliver measurable results. Nearform has a team of 500 experts in 20+ countries and is trusted by leading enterprises.

US

  • Translate customer workflows and edge cases into production-grade solutions.
  • Integrate systems, extend workflows, and build features to solve problems.
  • Identify patterns and feed them back into the core product to scale solutions.

Ascertain is building AI agents to automate the administrative work that burdens care teams. They are backed by Northwell Health and Deerfield Management and are on a mission to restore time, trust, and focus to the people who keep healthcare running.

Canada

  • Drive technical strategy and architectural vision.
  • Solve complex technical challenges and set technical direction.
  • Mentor senior technical talent and foster innovation.

Achievers provides an employee recognition and rewards platform for organizations to build cultures where people feel seen and valued. They have more than 4.3 million users across 190 countries and aim to inspire recognition everywhere.

$210,000–$250,000/yr
US Unlimited PTO

  • Design and build scalable and high-performance data software solutions using Golang and Python.
  • Build and deploy Kubernetes-based systems to manage containerized applications in cloud-native environments.
  • Collaborate with cross-functional teams to understand and address customer needs, ensuring systems evolve.

Machinify is a healthcare intelligence company focused on delivering value, transparency, and efficiency to health plan clients. They deploy a configurable, AI-powered platform used by over 85 health plans, representing more than 270 million lives, and foster a flexible and trusting environment.

US

  • Architect, design, and develop proof-of-concepts and early-stage production systems leveraging LLMs, agentic workflows, vector databases, and emerging AI technologies.
  • Build integrations with platforms such as Microsoft Copilot, ChatGPT, and other leading models using APIs, SDKs, and custom toolchains.
  • Create advanced prompts, system instructions, tools, and agent architectures to elevate automation, reasoning, and decision-making across business processes.

Progressive Leasing is a leading provider of in-store and e-commerce lease-to-own solutions. They have grown from start-up to industry leader by innovating, simplifying, and valuing people and are a subsidiary of PROG Holdings. Prog Tech embodies the modernity and transformational vision that is core to their business evolution.

US Unlimited PTO

  • Lead a global engineering team in developing innovative cloud-based solutions for loan servicing and mortgages.
  • Leverage modern technologies to create scalable software solutions while mentoring junior engineers.
  • Shape the architectural direction and foster a collaborative and high-performance team culture.

Jobgether uses an AI-powered matching process to ensure applications are reviewed quickly, objectively, and fairly against the role's core requirements. Their system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company.