Source Job

US

  • Design, build, and scale Checkbook's payments platform from databases and backend services to APIs and user interfaces.
  • Build and ship robust APIs integrating with internal, partner, and customer systems while ensuring security and integrity.
  • Optimize large database schemas and implement automation tools to ensure the quality and stability of web applications.

Python Postgres React Flask FastAPI

20 jobs similar to Senior Full Stack Engineer

Jobs ranked by similarity.

  • Develop full-stack applications and services using modern architectures, including RESTful APIs, containerized services, and front-end frameworks like React, Vue.js, or Angular.
  • Build and maintain backend services in Python and implement cloud-native solutions on Google Cloud or Azure, including microservices and async events.
  • Collaborate with Solutions Architects, participate in Agile ceremonies, and ensure code quality, security, and scalability through testing and CI/CD practices.

Egen is a fast-growing, entrepreneurial company with a data-first mindset, leveraging platforms like Google Cloud and Salesforce to help clients drive impact through data and insights. We bring together top engineering talent in a culture dedicated to learning, solving tough problems, and continuous innovation.

$160,000–$180,000/yr
Global Unlimited PTO

  • Drive self-serve product offerings to grow new revenue and support core business activities.
  • Design and build frontend and backend systems with good design patterns for extensibility.
  • Ensure data integrity and reliable source of truth for key business operations.

People Data Labs is a provider of people and company data, enabling customers to build innovative, compliant data solutions. They emphasize a collaborative, one-team culture with autonomy, ownership, and a focus on learning and growth.

North America Unlimited PTO

  • Build patient-centered products as a full-stack engineer while advocating for privacy, security, and access to care.
  • Collaborate with Product Managers, Designers, and stakeholders to deliver high-quality, extensible solutions.
  • Mentor fellow engineers and contribute to technical standards through code reviews and documentation.

Wisp is a healthcare company on a mission to democratize accessible, high-quality healthcare for women by bringing urgent care, ongoing support, and expert guidance together in one place. They foster a remote-first culture focused on collaboration, mentorship, and employee well-being.

Global

  • Build and maintain efficient back-end features in Python with a production team.
  • Improve application performance and reliability while defining REST APIs.
  • Participate in architectural decisions and enhance delivery pipelines and processes.

Gcore is a global provider of infrastructure and software solutions for AI, cloud, network, and security, powering digital experiences across the world. With a team of 550+ professionals and 210+ edge locations, it fosters a collaborative and globally distributed culture.

Europe 5w PTO

  • Build and operate Python/Django services for repairs, payments, messaging, notifications, and fraud prevention.
  • Work in cross-functional product teams using AI-assisted, spec-driven development from design through delivery.
  • Ensure reliability and data integrity through automated testing, observability, security, and incident response.

Plentific is a property technology platform for housing providers, local authorities, and contractors in the UK and Germany. We are a growing London-headquartered team working across Europe to expand the platform and integrate AI.

US

  • Design, build, test, and deploy backend features across payments, fraud, compliance, and user management
  • Integrate with banks, card networks, and third-party services, handling the edge cases money movement demands
  • Write and review technical designs and participate in architecture discussions for distributed, event-driven systems

Astra builds mission-critical infrastructure for moving money at scale, processing billions in annual transaction volume. They are a small, remote-first team with a culture of thoughtful collaboration and initiative.

$90,000–$130,000/yr
US

  • Develop, maintain, and automate web applications and data-processing workflows using Python, SQL, and modern web technologies.
  • Contribute across the full SDLC, from requirements analysis and design through testing, deployment, and maintenance.
  • Collaborate with technical and non-technical stakeholders to deliver high-quality, maintainable software solutions.

The employer is a partner company seeking a Senior Application Developer to build and automate web applications and data workflows. The role offers a flexible remote environment with a focus on engineering fundamentals and adaptability.

$135,000–$165,000/yr
US Unlimited PTO

  • Build full-stack features for the loan origination platform, including intake, decisioning, servicing, and collections.
  • Create internal tooling and data pipelines for loan management, compliance, and portfolio analytics.
  • Use AI-assisted development and collaborate with legal, data, and school stakeholders to deliver high-quality, compliant software.

Clasp is a mission-driven fintech expanding education access via student loan repayment and lending technology for colleges and employers. We're a venture-backed Forbes Fintech 50 startup focused on social impact.

$160,000–$170,000/yr
US

  • Design and write code in a multi-tenant SaaS environment using Python, Django, Ember, and PostgreSQL.
  • Collaborate with teammates across a geographically distributed remote environment and lead technical design initiatives.
  • Troubleshoot software defects, utilize PRs for teaching and learning, and share ownership of team dynamics and processes.

Xplor offers smart software, payments, and commerce-enabling solutions for businesses with daily recurring activities across five verticals. The company operates globally with a culture guided by core values and a focus on supporting employee growth.

Global

  • Take full ownership of backend features from design through production support.
  • Build and maintain integrations with KYC, geolocation, payment, and other external systems.
  • Implement observability, write tests, and support production with on-call rotations.

Fliff is a social gaming platform offering freemium sports, casino, and prediction games with real rewards. It is a multinational, close-knit team with offices across the US and Europe, focused on inclusion and innovation.

$200,000–$220,000/yr
US

  • Build and own the end-to-end credit product: underwriting, loan workflow, disbursement, and borrower experience.
  • Partner with data science to ship production decisioning and automated state machines for lending.
  • Drive disbursement reliability to 99% SLA and fix money-movement issues across ACH, RTP, and wires.

Alt is a platform for buying, selling, vaulting, and financing alternative assets, starting with the trading-card market. It is a remote-first company backed by leaders from Stripe, Coinbase, and pro athletes, focused on building credit products for collectors.

Brazil

  • Develop and optimize ETL pipelines and large-scale data processing for a data reconciliation platform.
  • Build backend services with Python, FastAPI, PostgreSQL, and AWS to ensure performance and scalability.
  • Improve frontend features with React and TypeScript for data grids and server-side interactions.

North America Unlimited PTO

  • Take deep ownership of systems and product areas, becoming the go-to technical expert for what you own.
  • Architect, build, and maintain highly available, scalable REST APIs and backend services across distributed systems.
  • Build agentically with AI coding tools, staying at the forefront of emerging AI tooling and practices.

Postscript is an AI messaging platform for Shopify brands, helping e-commerce marketers drive revenue through SMS marketing and AI features. Backed by Greylock and Y Combinator, the company has been fully remote since 2018 and serves 20,000+ Shopify brands with a culture of ownership and AI-first development.

Global

  • Build scalable, high-load systems in Python and work with big data processing 200–400M+ records per day.
  • Design and develop integrations with external channels behind a unified data model and API.
  • Ensure data quality and consistency across channels through validation, reconciliation, and monitoring.

SplitMetrics is a global software company providing a growth engine for mobile-first businesses through its ecosystem of products and services, including Apple Ads optimization and A/B testing. With over 11 years of experience and a remote-first culture, the company collaborates across 20+ countries and values transparency, speed, and continuous learning.

$104,000–$166,000/yr
US

  • Design and develop a cloud-ready relational database with PostgreSQL/PostGIS to support the USGS Volcano Hazards Program's monitoring and evaluation workflows.
  • Build RESTful APIs in Python (FastAPI or Flask) and create a web-based interface with React and JavaScript/TypeScript for data entry and visualization.
  • Implement GIS-enabled tools for geospatial visualization using ESRI JavaScript API, Leaflet, or Mapbox, ensuring Section 508 accessibility and federal IT security compliance.

Peraton is a next-generation national security company that drives missions of consequence globally. As the world's leading mission capability integrator and transformative enterprise IT provider, it serves essential government agencies and supports every branch of the U.S. armed forces.

$175,000–$210,000/yr
US

  • Work across the stack to drive high-leverage projects from concept to completion and produce detailed technical specifications.
  • Up-level the team with expertise in API or system design, cloud infrastructure, healthcare data, or other areas while collaborating with a multidisciplinary team.
  • Build and refine user-facing features, establish consistent APIs, and write unit, integration, and end-to-end tests for new features.

Curai Health is a healthcare company that uses artificial intelligence and clinical expertise to make care more affordable, accessible, and effective. They are a mission-driven team of talented colleagues committed to collaborating closely and driving meaningful impact in healthcare.

$150,000–$170,000/yr
US

  • Design and scale backend systems for data infrastructure, including PostgreSQL data models, Kafka event pipelines, and a GraphQL API.
  • Lead the integration of new services and own the pipelines that deliver dataset snapshots into our warehouse.
  • Collaborate with platform and application teams to implement APIs that unlock new workflows for clinical studies and digital health products.

Beacon Biosignals is transforming precision medicine for the brain with at-home EEG and diagnostic platforms for neurological, psychiatric, and sleep disorders. The company values diversity, empathy, and a self-service mindset, with a collaborative remote-first culture.

$300,000–$500,000/yr
Global

  • Own products and systems end to end, from ambiguous customer problems through architecture, implementation, and launch.
  • Build reliable backend systems for real-time bidding, payments, vault workflows, and partner integrations.
  • Use AI deeply to prototype, build, and iterate, and own the quality of what ships.

Alt unlocks the value of alternative assets, starting with the $5B trading-card market, letting collectors buy, sell, vault, and finance their cards in one place. Backed by leaders from Stripe, Coinbase, and pro athletes, it's a remote-first startup focused on real-time pricing and AI-native workflows.

US

  • Develop and deliver full-stack AI-powered applications on top of Unframe's platform.
  • Work closely with customers and internal teams to tailor solutions and extend the UI/UX layer.
  • Collaborate with platform and research teams to integrate AI capabilities into production use.

Unframe is an AI-first startup helping large enterprises bring LLM-powered applications to life in days, combining the speed of a product company with the flexibility of a consultancy. With over $100M in TCV and a new $50M Series B, Unframe is scaling globally alongside Fortune 500 customers, backed by Bessemer, Craft, and TLV.

Europe

  • Architect and build robust, scalable data schemas and storage solutions optimized for high-performance AI workloads.
  • Optimize storage formats and database queries to drive performance and efficiency across massive biological datasets.
  • Design clean, typed, well-documented APIs for researchers, engineers, and AI agents to query and extend the platform.

Bioptimus is building the first universal AI foundation model for biology to fuel breakthrough discoveries in biomedicine. With over $75M in funding and a world-class team of scientists and engineers, the fast-growing Paris-based startup is redefining the frontiers of AI and life sciences.