Source Job

  • Design, develop, and maintain application features using Python (backend) and React/TypeScript (frontend).
  • Leverage AI-assisted development tools effectively while maintaining the judgment to validate and correct AI-generated output.
  • Collaborate closely with the existing engineering team to ship production-quality code at a fast pace.

Python React TypeScript JavaScript Go

20 jobs similar to Sr. Application Engineer

Jobs ranked by similarity.

$88,436–$107,482/yr
UK 5w PTO

  • Design, build and ship well-tested features across our platform.
  • Collaborate closely with Product and Design to understand problems and requirements.
  • Incorporate AI tools and workflows into your day-to-day development practice.

Thirdfort is on a mission to protect society from fraud and money laundering, having already protected over 3 million people. They are FCA regulated and have raised over $33m in capital from leading Fintech investors.

$195,000–$257,000/yr
US

  • Partner with Product and Design to define, build, and evolve user experiences across the full stack.
  • Own and evolve both frontend and backend architecture to ensure scalability and performance.
  • Lead the design and implementation of complex frontend systems using React, TypeScript, and Next.js.

EarnIn builds products that deliver real-time financial flexibility. They are a fast-growing company with experienced leadership and world-class funding partners.

US

  • Building features end-to-end, leading projects and taking ownership of their delivery and impact.
  • Contributing to the underlying platform to keep it stable and the developer experience smooth.
  • Teaming up with product & design to push for the best outcome in every project.

Fay's mission is to make nutrition a foundational pillar of preventative care, improving outcomes, accessibility, and affordability at scale. They are building AI-powered infrastructure to transform preventative healthcare, and is backed by investors like General Catalyst, Forerunner, 1984, and Goldman Sachs.

$4,400–$4,900/mo

  • Design and build high-quality, maintainable user interfaces using JavaScript/TypeScript and React.
  • Develop and maintain Python-based backend APIs that support frontend workflows and product capabilities.
  • Translate business rules, pricing logic, and data dependencies into intuitive user experiences and reliable API integrations.

OpenX is focused on unleashing the full economic potential of digital media companies. They build digital advertising markets and technologies designed to deliver optimal value to publishers and advertisers. At OpenX, they have built a uniquely experienced team.

US

  • Pick up live work across data ingestion, knowledge graph integration, and the application layer.
  • Contribute to the front-end and runtime layer that surfaces AI agent activity, recommendations, and human-in-the-loop governance to client users.
  • Move freely between Python backend, TypeScript frontend, and infrastructure work as the build demands.

Peach Pilot builds a platform that ingests everything about how a company operates and constructs a Company Brain: a living knowledge graph that connects people, decisions, and outcomes across the entire organization. They are co-founded by Mario Montag and JP James and have a working platform with live infrastructure and a proven data-to-insights methodology.

Europe

  • Build features, fix bugs, and gradually take on more ownership as you learn the product.
  • You'll work alongside senior engineers who'll help you grow, but we won't spoon-feed you either.
  • You'll use AI tools heavily in our workflow - you'll be expected to leverage them to move fast and learn faster.

Cello provides the Revenue Growth Infrastructure for modern digital businesses. They help teams acquire, retain, and monetize customers at scale by turning word-of-mouth into a systematic, measurable growth channel built for the AI era. They are a small team backed by $10.3M in funding from top-tier investors.

$131,000–$152,000/yr
US 12w maternity

  • Build and maintain product features across backend services, APIs, data systems, and user-facing workflows.
  • Contribute to services that process SaaS activity, identity data, permissions, alerts, and security findings.
  • Improve existing systems for performance, reliability, maintainability, and observability.

Obsidian Security secures SaaS applications and platforms. They are backed by top investors and trusted by global enterprises.

US

  • You'll own web applications for sales, designers, installers, operations, leadership, and customers.
  • You'll ship features that streamline workflows and resolve lead source issues.
  • You'll participate in production meetings to grasp workflows before development.

Altimate Outdoor started as a small spouting company and has grown into one of Ohio's premier outdoor living builders. With two showrooms and nearly 60 people, they value integrity, dedication, optimism, and persistence, operating on EOS with ambitious technology and AI strategies.

Global

  • Build, test, ship, and maintain high-quality software across Seso’s platform.
  • Use modern AI tools to improve your own engineering speed and quality across coding, debugging, testing, documentation, refactoring, and technical exploration.
  • Help design and build product features that use LLMs, agents, structured data extraction, summarization, recommendations, search, classification, document understanding, or other AI-enabled capabilities.

Seso is modernizing the back-office for farms by building the premier platform for agribusiness to hire and manage their workforce and improve the lives of agricultural workers. They have raised over $60M from Tier I investors and have been recognized with awards including Forbes Rising Stars and Andreessen Horowitz's American Dynamism 50.

$95,786–$119,733/yr
Canada 4w PTO

  • Design and develop full stack features for our AI-powered web application using Python, React, Redux, PostgreSQL, and AWS
  • Integrate AI models and APIs for tasks like document processing, data extraction, recommendation engines etc.
  • Construct scalable, secure, and observable cloud architectures for our core AI services

PolicyMe is Canada’s leading digital insurance solution, offering straightforward and affordable financial protection for families. They operate with a remote-first culture, attracting top talent from across Canada and have sold over $10 billion in insurance coverage.

US

  • Design and develop enterprise-grade full-stack AI B2B SaaS web apps.
  • Work directly with users and prioritize their needs.
  • Take responsibility over significant portions of the product.

Clearly AI automates security and privacy reviews with AI. They help engineering teams ship faster by automating security and privacy reviews, and are a fast-growing YC startup with enterprise customers.

  • Design, develop, and deploy generative AI product features from prototype through scaled production.
  • Build and ship agentic workflows that reliably accomplish real customer outcomes.
  • Collaborate with product managers, designers, and data science to translate ambiguous problems into AI solutions.

Quantum Workplace helps leaders build thriving teams that are aligned, empowered, growing, and valued. They offer a connected talent platform and have partnered with thousands of organizations in their 20+ years in the HR technology space.

South Africa 4w PTO

  • Design, build, and maintain agent-based web applications using Next.js, TypeScript, Tailwind CSS, and OpenAI’s APIs.
  • Contribute to existing Python API and web applications using the Flask framework and improve application reliability.
  • Collaborate with product, design, and stakeholders to translate requirements into high-quality technical solutions.

Noodle is a leading strategy, services, and technology partner for higher education. We develop infrastructure, provide learning experiences, and grow enrollment for academic institutions, seeking to empower universities to change the world. Noodle is committed to creating a welcoming and inclusive workplace for everyone.

$170,000–$170,000/yr
US Unlimited PTO

  • Lead by example: contribute high-quality code across backend and frontend systems
  • Shape architecture: design scalable services, APIs, and data models that support long-term growth
  • Mentor engineers: coach and support teammates through code reviews, design discussions, and problem-solving

WorkBoard’s Strategy Execution Platform powers the digital operating rhythm for companies around the globe, providing organization-wide clarity, alignment, and insights for growth. More than 15,000 people are certified in WorkBoard’s OKR coaching and Outcome Mindset Methodology™ which enables their organizations to quickly gain the agility OKRs can provide.

$160,000–$200,000/yr
US Canada Europe Unlimited PTO 12w maternity

  • Build and ship new features across Privacy.com 's product suite, working on both frontend and backend systems.
  • Use AI coding tools (Claude Code, Cursor, Copilot, etc.) effectively across the full development lifecycle and help establish patterns for the team.
  • Collaborate with product and design to translate requirements into technical solutions that prioritize customer experience.

Privacy.com is the virtual card platform giving consumers and small businesses complete control over their online payments. Their dedicated team of 35 sits at the heart of Lithic's 160+ person organization, spanning 26 states and 7 countries, headquartered in New York City.

Global

  • Work directly with clients from early discovery through delivery, with no proxy or PM buffer.
  • Build end-to-end solutions across the stack, backend-heavy and use AI tools daily for coding and QA.
  • Help clients understand what's possible with AI, not just deliver what they asked for.

Boldare is a software company that helps businesses build and transform with AI. They are pioneers of Agile in Poland, working across time zones with clients who trust them to figure things out, not just execute specs.

$160,000–$220,000/yr
US

  • Help design the architecture of a system with multiple AI models, a set of backend APIs, and a frontend web application.
  • Write code within a small team, striking a reasonable balance between velocity and writing maintainable code.
  • Work with users and other team members to help define and refine product requirements, and translate them into a roadmap and code.

ConductorAI values candidates who can manage complexity and work independently. They are an equal opportunity employer using state-of-the-art tech to solve novel problems with mission partners.

US

  • Design and develop modern full-stack application features using React, TypeScript, Python, and FastAPI.
  • Develop backend APIs and services that integrate with internal enterprise systems and downstream workflows.
  • Help modernize and simplify legacy operational processes through thoughtful application design and automation.

Trility Consulting fosters a strong, remote-work culture where people thrive, earning them a Great Place to Work Certification. They embrace flexible schedules and collaboration across geographically distributed teams serving clients from all corners of the United States and globally.

Latin America

  • Build and maintain automated evaluation pipelines (evals) for agent and skill outputs.
  • Define strict input/output contracts for MCP tools and agent skills using typed schemas.
  • Own the prompt engineering lifecycle for assigned tools and skills.

EX Squared LATAM is a digital transformation company focused on building innovative, high-impact technology solutions. They partner with top-tier clients across global, regional, and local markets, fostering a collaborative, inclusive, and innovation-driven culture.

US

  • Operate daily with Claude Code using structured, repeatable workflows: plan, decompose, implement, test, ship
  • Serve as a technical resource for AI-augmented workflows across the engineering team, sharing playbooks, patterns, and tooling that help other developers level up
  • Continuously research and evaluate new AI tools, models, and techniques with a framework for deciding what to adopt

Mango Languages is an industry leader in providing engaging language-learning experiences to millions of users around the globe. Their software uses real-world conversations and cultural insights to share world languages with public library patrons, students, corporate employees, government officials, and learners of all ages.