CrawlJobs Logo

Elixir Backend Engineer

Netherlands, Amsterdam · Job Posted January 04, 2026
Apply Position
Job Link Share

Job Description

Together.ai is looking for a Senior Backend Engineer to join the Identity & Collaboration team, where we build the foundational authentication, authorization and collaboration features that power every product and service. Our work is mission-critical: as part of the Product Foundations engineering group, we own authentication flows (including SSO and OAuth), organizations, projects, API keys, and role-based access controls that enable secure collaboration across at scale.

Job Responsibility

  • Design & Implement Elixir APIs and services that serve Together AI users
  • Build service SDKs and advise other teams who consume our Elixir API in TypeScript, Golang, and Python
  • Contribute to running the Elixir/Erlang VM (BEAM) in production
  • Work across services to improve service integrations and replace legacy solutions
  • Participate in making product and technical decisions that are in the best interest of our customers
  • Maintain our systems to the highest standards of code quality, documentation, automated testing, and continuous delivery
  • Work with relational (PostgreSQL) and non-relational (MongoDB) data

Requirements

  • Experienced backend developer
  • Worked with relational databases, key/value stores, and object-relational mappers
  • Willing and eager to become proficient in Elixir and Phoenix
  • Excellent programming skills
  • Experience working in Elixir or another functional programming language is strongly preferred
  • Experienced with, or at least interested in, authentication and authorization (including abbreviations like OIDC, SAML, OAuth, JWT, RBAC, ABAC, SSO and more)
  • Proficient in TypeScript and Next.js API development
  • Passion for working in high-performing startup teams where you can take charge of reducing ambiguity and shaping open-ended requirements
  • Curious to try and learn new things, and are not afraid to propose new approaches and make mistakes
  • Excel in your communication skills, such as openly soliciting and giving feedback to improve and develop the team, constructively discussing approaches to problems faced by the team

What we offer

  • Competitive compensation
  • Startup equity
  • Competitive benefits

Looking for more opportunities?

Search for other job offers that match your skills and interests.

Similar Jobs for

Elixir Backend Engineer

8 matching positions

Lead Backend Engineer

Tonsser is on a mission to redefine youth sports. Hundreds of thousands of young...
Location
Location
Salary
Salary:
80000.00 - 90000.00 EUR / Year
tonsser.com Logo
Tonsser
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Significant experience as a senior or lead backend engineer, ideally with time spent owning architecture decisions in a production environment
  • Deep comfort with at least one of Ruby, Python, Elixir, Go, or a similar modern backend language, and the judgement to know when language choice matters and when it doesn't
  • Strong opinions on API design, data modelling, and system evolution
  • Hands-on experience integrating AI/LLM capabilities into real products, or a strong, demonstrable interest in doing so
  • Experience leading or mentoring other engineers
  • Comfortable working remotely across European timezones
Job Responsibility
Job Responsibility
  • Lead the architectural direction of our backend platform as we evolve from where we are today toward what's next
  • Drive the technical roadmap for our new flagship project
  • Set the standard for how the team works with AI, both in our development workflow and as a product capability
  • Ship production code, review PRs, and mentor the engineers around you
  • Partner closely with product, mobile, and design to turn ambitious ideas into things that actually work at scale
  • Make pragmatic calls about what to keep, what to evolve, and what to rebuild
What we offer
What we offer
  • Remote work across Europe
  • Fulltime
Read More
Arrow Right

Senior Backend Engineer

As a Back End Engineer you are responsible for designing, developing, and mainta...
Location
Location
France , Paris
Salary
Salary:
55000.00 - 70000.00 EUR / Year
beamy.io Logo
Beamy
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 7+ years of professional software development experience in back-end development
  • Strong expertise in back-end technologies and system architecture
  • Comfortable with server-side technologies (Elixir, Node.js, Ruby, Python, Java, or similar)
  • Comfortable with database systems (PostgreSQL, MySQL, MongoDB, Redis, etc.)
  • Comfortable with RESTful APIs and/or GraphQL
  • Comfortable with microservices architecture and distributed systems
  • Comfortable with message queues and event-driven architectures (RabbitMQ, Kafka, etc.)
  • Comfortable with version control systems (Git)
  • Comfortable with testing frameworks and methodologies (unit, integration, end-to-end)
  • Comfortable with CI/CD practices and deployment automation
Job Responsibility
Job Responsibility
  • Design, develop, and maintain scalable back-end services and APIs
  • Build and optimize database schemas and data models
  • Write clean, maintainable, and well-tested code following team standards and best practices
  • Participate in code reviews and provide constructive feedback to team members
  • Debug production issues and implement robust solutions
  • Contribute to technical documentation and architecture decisions
  • Design and implement RESTful APIs and GraphQL endpoints
  • Optimize application performance, database queries, and system scalability
  • Implement caching strategies and asynchronous processing systems
  • Participate in agile ceremonies and technical planning sessions
What we offer
What we offer
  • 4-day work week after your first month
  • 5 weeks of paid vacation
  • Flexible remote work
  • 75% of Navigo Pass or 20€ monthly sustainable allowance
  • Alan health insurance – 66% covered for you and your children, 40% for your partner
  • Meal vouchers - Swile Card – €9 per working day, 50% funded by Welcome
  • Plan de développement professionnel
  • Congés pour enfant malade
  • Solution de prévention santé mentale
  • Employee Resource Groups (ERG)
  • Fulltime
Read More
Arrow Right

Senior Backend Engineer

As a Back End Engineer you are responsible for designing, developing, and mainta...
Location
Location
France , Paris
Salary
Salary:
55000.00 - 70000.00 EUR / Year
assessfirst.com Logo
Assessfirst
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 7+ years of professional software development experience in back-end development
  • Strong expertise in back-end technologies and system architecture
  • Comfortable with server-side technologies (Elixir, Node.js, Ruby, Python, Java, or similar)
  • Comfortable with database systems (PostgreSQL, MySQL, MongoDB, Redis, etc.)
  • Comfortable with RESTful APIs and/or GraphQL
  • Comfortable with microservices architecture and distributed systems
  • Comfortable with message queues and event-driven architectures (RabbitMQ, Kafka, etc.)
  • Comfortable with version control systems (Git)
  • Comfortable with testing frameworks and methodologies (unit, integration, end-to-end)
  • Comfortable with CI/CD practices and deployment automation
Job Responsibility
Job Responsibility
  • Design, develop, and maintain scalable back-end services and APIs
  • Build and optimize database schemas and data models
  • Write clean, maintainable, and well-tested code following team standards and best practices
  • Participate in code reviews and provide constructive feedback to team members
  • Debug production issues and implement robust solutions
  • Contribute to technical documentation and architecture decisions
  • Design and implement RESTful APIs and GraphQL endpoints
  • Optimize application performance, database queries, and system scalability
  • Implement caching strategies and asynchronous processing systems
  • Participate in agile ceremonies and technical planning sessions
What we offer
What we offer
  • 4-day work week after your first month
  • 5 weeks of paid vacation
  • Flexible remote work
  • 75% of Navigo Pass or 20€ monthly sustainable allowance
  • Alan health insurance – 66% covered for you and your children, 40% for your partner
  • Meal vouchers - Swile Card – €9 per working day, 50% funded by Welcome
  • Professional development plan
  • Sick child leave
  • Mental health benefits
  • Employee Resource Groups (ERG)
  • Fulltime
Read More
Arrow Right

Staff Backend Engineer

At AdRise, we build cutting-edge advertising capabilities for Tubi and across th...
Location
Location
United States , New York
Salary
Salary:
179000.00 - 284000.00 USD / Year
foxnews.com Logo
Fox News Media
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 8+ years building production backend systems
  • experience owning critical online services
  • expertise in distributed systems, concurrency, and performance engineering
  • proficiency in Golang or Elixir (both preferred)
  • strong code quality and review standards
  • deep experience with AWS, Kubernetes, and Infrastructure-as-Code (Terraform)
  • strong with PostgreSQL and Redis
  • streaming/queueing experience a plus
  • experience with object storage and queues/streams
  • track record of raising reliability (SLOs, error budgets) and improving on-call quality
Job Responsibility
Job Responsibility
  • Design, build, and operate the media processing platform for ad creatives: transcoding, packaging, transcription, brand detection, content rating, and ad media review
  • contribute to system design
  • build and maintain critical online services and pipelines
  • be responsible for autoscaling and reliability to ensure timely, low-latency processing at scale
  • architect and evolve microservices and workflows that power the ad media processing system
  • author architecture design documents
  • participate in reviews
  • own service availability, p99 latency, and throughput SLOs
  • drive autoscaling and capacity planning for high-traffic and high-throughput processing
  • implement multi-region readiness: redundancy, traffic shifting, canary/blue-green rollout, and safe rollback
What we offer
What we offer
  • annual discretionary bonus
  • medical/dental/vision
  • insurance
  • a 401(k) plan
  • paid time off
  • Fulltime
Read More
Arrow Right

Lead Backend Engineer

Join the Customer Experience Platform team to help build a world-class Customer ...
Location
Location
United States , San Francisco; Los Angeles; Seattle; New York
Salary
Salary:
195000.00 - 230000.00 USD / Year
whatnot.com Logo
Whatnot
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5+ years of full-time software engineering experience in high growth startups
  • Bachelor’s degree in Computer Science, a related field, or equivalent work experience
  • Proven track record of building end-to-end product experiences and scaling high-scale backend systems
  • Experience with Python, Elixir, and/or Postgres is a plus
  • Ownership Mindset: Own projects holistically from inception to production and beyond
  • Product Instinct: Excel at translating user needs to effective technical solutions
  • Problem Solving: Thrive in ambiguity and tackle challenging problems with creativity and autonomy
  • Team Leadership: Proactively improve the team environment and foster inclusive, supportive team culture
Job Responsibility
Job Responsibility
  • Build new user-facing experiences
  • Scale internal infrastructure
  • Design intelligent AI-powered automations to help solve thousands of customer issues per hour
  • Lead solutions end to end
  • Translate ambiguous business problems into clear technical solutions and drive delivery and experimentation
  • Balance development speed, product impact, and technical excellence
What we offer
What we offer
  • Generous Holiday and Time off Policy
  • Health Insurance options including Medical, Dental, Vision
  • Work From Home Support
  • Home office setup allowance
  • Monthly allowance for cell phone and internet
  • Care benefits
  • Monthly allowance for wellness
  • Annual allowance towards Childcare
  • Lifetime benefit for family planning, such as adoption or fertility expenses
  • Retirement
  • Fulltime
Read More
Arrow Right

Senior Backend Engineer

SumUp enables businesses to get paid easily, process orders quickly, sell online...
Location
Location
Brazil , Florianópolis
Salary
Salary:
Not provided
fin.capital Logo
Fin Capital
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Proficient in one or more modern backend languages: Golang, Elixir, Kotlin, Java, Ruby, or one functional programming language
  • Experienced in developing and maintaining distributed microservices and RESTful APIs
  • Prior experience with modern cloud technologies (AWS, Docker, Kubernetes)
  • Knowledgeable in event streaming platforms and messaging brokers such as Kafka and RabbitMQ
  • Demonstrated ability to learn new languages and technologies
  • Comfortable working with SQL and NoSQL databases
  • Experience with CI/CD products such as GitHub Actions, Jenkins, ArgoCD
  • Take pride in work, have a keen sense of ownership, and are dedicated to writing clear, maintainable, and testable code
  • Product-focused engineer who is passionate and curious about solving user challenges
  • Great English communication skills
Job Responsibility
Job Responsibility
  • Evolve and maintain the Brazilian segment of the Transfers ecosystem within SumUp Global Bank tribe
  • Support the transition from a localized setup with regional banks to a unified Global Bank
  • Design, implement, and iteratively develop highly available backend services, while continuously evaluating and implementing new methods to ensure the high reliability of transfer systems
  • Maintain and improve core services utilizing a modern, cloud-native technology stack (AWS), with microservices (Docker, K8s) written in Go/Kotlin and Elixir
  • Improve test coverage for existing services and own the end-to-end delivery of changes, including testing, observability, and monitoring
  • Continuously improve our engineering culture by refining best practices, clarifying problems and opportunities, prototyping solutions, providing comprehensive documentation, and selecting new tools and technologies
What we offer
What we offer
  • Career Growth: Be part of a global team working on large-scale fintech products used by millions of businesses
  • Learning & Development: Access an annual budget of R$ 10,000 for education, certifications, and conferences
  • Time Off: Enjoy 30 additional days off through our Break4Me program after 3 years at SumUp
  • Grow with Us: Participate in our virtual stock program and benefit from SumUp’s success with company shares
  • Global Experience: Collaborate with a diverse team of 3,000+ people from over 90 countries, and join our global off-sites and hackathons
  • Collaborative Culture: Join a team that values diversity, innovation, and teamwork, where your ideas and contributions truly matter
  • Great Benefits: Health plans, meal vouchers (VR), Zenklub, Wellhub, life insurance, childcare allowance, and more
Read More
Arrow Right

Software Engineer Backend Travel

Are you a passionate and skilled backend software engineer looking for an exciti...
Location
Location
United Kingdom , London
Salary
Salary:
80000.00 - 90000.00 GBP / Year
antellarecruitment.co.uk Logo
Antella Travel Recruitment
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor's degree in Computer Science, Software Engineering, or a related field
  • 3+ years of experience in backend software development
  • A passion for designing and building fantastic API's, delivering great developer experiences to go with it
  • An interest in working with Elixir, this is what our client mostly works with
  • A high bar in code quality and API design
  • Experience in Travel / Flights, hotels or cars REQUIRED
Job Responsibility
Job Responsibility
  • Designing, developing, and maintaining the server-side components of our client's innovative software solutions
  • Collaborate with cross-functional teams, including frontend developers, designers, and product managers, to create scalable and efficient backend systems that power our client's applications
What we offer
What we offer
  • Hybrid work environment (combination of remote and in-office work)
  • Comprehensive benefits package
  • Opportunities for professional growth and development
  • Collaborative and supportive team culture
  • Chance to work on innovative projects with cutting-edge technologies
  • Fulltime
Read More
Arrow Right

Senior Backend Engineer

As a Back End Engineer you are responsible for designing, developing, and mainta...
Location
Location
France , Paris
Salary
Salary:
55000.00 - 70000.00 EUR / Year
assessfirst.com Logo
Assessfirst
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 7+ years of professional software development experience in back-end development
  • Strong expertise in back-end technologies and system architecture
  • Comfortable with server-side technologies (Elixir, Node.js, Ruby, Python, Java, or similar)
  • Comfortable with database systems (PostgreSQL, MySQL, MongoDB, Redis, etc.)
  • Comfortable with RESTful APIs and/or GraphQL
  • Comfortable with microservices architecture and distributed systems
  • Comfortable with message queues and event-driven architectures (RabbitMQ, Kafka, etc.)
  • Comfortable with version control systems (Git)
  • Comfortable with testing frameworks and methodologies (unit, integration, end-to-end)
  • Comfortable with CI/CD practices and deployment automation
Job Responsibility
Job Responsibility
  • Design, develop, and maintain scalable back-end services and APIs
  • Build and optimize database schemas and data models
  • Write clean, maintainable, and well-tested code following team standards and best practices
  • Participate in code reviews and provide constructive feedback to team members
  • Debug production issues and implement robust solutions
  • Contribute to technical documentation and architecture decisions
  • Design and implement RESTful APIs and GraphQL endpoints
  • Optimize application performance, database queries, and system scalability
  • Implement caching strategies and asynchronous processing systems
  • Participate in agile ceremonies and technical planning sessions
What we offer
What we offer
  • Four-day week
  • Professional development plan
  • Sick child leave
  • Mental health benefits
  • Employee Resource Groups (ERG)
  • Fulltime
Read More
Arrow Right