CrawlJobs Logo

Senior Back-End Engineer (Go)

zerotier.com Logo

ZeroTier

Location Icon

Location:
Netherlands , Utrecht

Category Icon

Job Type Icon

Contract Type:
Not provided

Salary Icon

Salary:

Not provided

Job Description:

ZeroTier builds next-generation connectivity and cybersecurity technology used by millions of people and organizations worldwide. Our platform enables highly secure, peer-to-peer virtual networks across a wide range of use cases. Our mission is to make secure, peer-to-peer networking simple and accessible, without sacrificing performance or security, supported by long-term investors including Battery Ventures, Bonfire Ventures, and Anorak Ventures.

Job Responsibility:

  • Define and document new API endpoints and implement business logic in Go to support platform features
  • Design and maintain public service interfaces that support high performance and availability
  • Work with PostgreSQL, Redis, PubSub, and OpenFGA to power Central features
  • Implement user-facing features in Vue.js
  • Collaborate on API design to support both internal UI needs and public API consumers
  • Utilize best practices for securing public services and work with automated testing to ensure code quality
  • Provide technical mentorship and contribute to engineering best practices across the team

Requirements:

  • Senior level experience building and owning distributed systems at scale
  • Advanced knowledge of Go service development and best practices
  • Proficiency in modern web technologies (JavaScript/TypeScript, CSS) and frontend frameworks (Vue.js/React)
  • Extensive experience integrating with and extending backend REST APIs
  • Experience working in a team with a continuous growth mindset
  • History of applying best practices for security in public services
  • Ability to write technical documentation and communicate effectively with team members
  • Experience in a startup or fast-paced environment is a strong plus

Nice to have:

Experience in a startup or fast-paced environment is a strong plus

What we offer:
  • Competitive salary
  • Hybrid work environment: we work 3 days at our office at Utrecht Central Station and 2 days from home
  • Equity compensation package
  • Retirement savings plan with employer contribution
  • 25-holiday days PTO per year
  • Flexible work hours (subject to management approval)
  • Career Enhancement Funds
  • Employee Referral Bonus

Additional Information:

Job Posted:
January 08, 2026

Work Type:
Hybrid work
Job Link Share:

Looking for more opportunities? Search for other job offers that match your skills and interests.

Briefcase Icon

Similar Jobs for Senior Back-End Engineer (Go)

Senior Software Engineer (Web)

We are looking for experienced, passionate, and resourceful senior full-stack en...
Location
Location
Thailand , Bangkok
Salary
Salary:
Not provided
earnin.com Logo
EarnIn
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 4+ years of development experience in a fast-paced environment
  • Excellent knowledge of front-end web programming languages, such as HTML, CSS, JavaScript, Typescript, and ReactJS, with the ability to render server-side and client-side content
  • Excellent knowledge of one or more back-end programming languages (C#, Python, Kotlin, Go)
  • Bachelor's, Master’s, or PhD degree in computer science, computer engineering, or a related technical discipline, or equivalent industry experience
  • Excellent analytical thinking and problem-solving skills
  • Excellent written and verbal communication skills
  • Experience with continuous integration and delivery tools
Job Responsibility
Job Responsibility
  • Drive the implementation of new features - break down complex problems into their bare essentials, translate this complexity into elegant design, and create high-quality, maintainable code
  • Collaborate and mentor other engineers while providing thoughtful guidance using code, design, and architecture reviews
  • Work cross-functionally with other teams (data science, design, product, marketing, analytics)
  • Leverage a broad skill set and help us implement and learn new technologies quickly
  • Create and maintain test automation to enable continuous integration and development velocity
What we offer
What we offer
  • Healthcare
  • Internet/cell phone reimbursement
  • A learning and development stipend
  • Opportunities to travel to our Mountain View HQ
  • Fulltime
Read More
Arrow Right

Senior Back-End Software Engineer

Security represents the most critical priorities for our customers in a world aw...
Location
Location
United States , Redmond
Salary
Salary:
119800.00 - 234700.00 USD / Year
https://www.microsoft.com/ Logo
Microsoft Corporation
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor's Degree in Computer Science or related technical field AND 4+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.
  • Ability to meet Microsoft, customer and/or government security screening requirements are required for this role.
  • Microsoft Cloud Background Check: This position will be required to pass the Microsoft background and Microsoft Cloud background check upon hire/transfer and every two years thereafter.
  • Master's Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelor's Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.
  • 2+ years of experience designing and building solutions using microservices architecture.
  • 4+ years of experience designing, developing, or maintaining secure software systems, with applied knowledge of authentication, data protection, access control, and secure coding practices.
  • 4+ years of experience designing, building, and operating scalable, highly available cloud services or distributed systems on platforms such as Azure, AWS, GCP, or comparable cloud environments, with production ownership and CI/CD pipeline integration.
  • 4+ years of experience applying distributed systems concepts such as concurrency, conflict resolution, and consensus algorithms to build resilient and maintainable back-end architectures.
  • 4+ years of experience building systems with emphasis on reliability, durability, and operational efficiency, including experience with live site operations, incident response, and performance optimization.
  • 4+ years of experience programming in modern back-end languages such as C#, Java, Go, or Python.
Job Responsibility
Job Responsibility
  • Contributes to processes for the architecture of a product/solution feature and helps to create proposals for architecture by testing design hypotheses and helping to refine code plans.
  • Helps identify other teams and technologies that will be leveraged, how they will interact, and when one's system may provide support to others.
  • Support efforts to apply debugging tools and examines logs, telemetry, and other methods to verify assumptions proactively before issues occur and reactively as issues occur for product features.
  • Participate in code reviews to ensure coding standards are followed.
  • Conduct and create experiments to determine the effectiveness of changes for prototyping and testing features, and applies those findings back into development.
  • Maintains operation of live service as issues arise on a rotational, on-call basis.
  • Alert stakeholders their statuses and garner approval to restore systems/products/services.
  • Respond within Service Level Agreement timeframes.
  • Considers partners across teams and their end goals for products to drive and achieve user experiences and fitting the dynamic needs of partners/customers through product development.
  • Fulltime
Read More
Arrow Right

Senior Software Engineer in Quality Engineering

We are seeking a Senior Software Engineer in Quality Engineering who will serve ...
Location
Location
United Kingdom , London
Salary
Salary:
Not provided
sothebys.com Logo
Sotheby's
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor’s degree in computer science/engineering or equivalent technical experience
  • 5+ years of software engineering experience, including automation across functional, end-to-end, regression, quality monitoring and performance testing for web-based, microservices systems
  • Strong programming fundamentals with the ability to work across languages
  • experience with TypeScript and Go is required
  • Deep back-end automation experience, including GraphQL API testing (required) and working knowledge of REST and SQL-based validation
  • Ability to innovate, design and maintain scalable automation frameworks, including service-level tests and test data strategy
  • Hands-on experience building automation into CI/CD and managing quality gates using tools such as GitHub Actions (Bazel familiarity is a plus)
  • Experience with API tooling (for example Postman-style tools) and cloud testing platforms (BrowserStack/LambdaTest)
  • Appium experience for mobile testing is required
  • Working knowledge of cloud/container environments (Docker, Kubernetes) and comfort troubleshooting distributed systems using logs and service-to-service signals
Job Responsibility
Job Responsibility
  • Lead cross-team quality engineering initiatives in partnership with QA, Engineering Managers, and developers, with primary focus on back-end services
  • Define and drive automation strategy and standards (framework design, maintainability, reliability), raising the quality bar across teams
  • Guide tooling decisions for service automation, including API testing, contract validation, test data and AI tools approaches
  • Build and evolve GraphQL and REST back-end automation capabilities for microservices and event-driven workflows, emphasizing service reliability and data integrity
  • Improve CI/CD validation by strengthening service-level test pipelines, environment readiness, and dependable test data setup
  • Diagnose and reduce back-end quality risks by targeting distributed-system failure modes such as race conditions and consistency issues
  • Mentor QA engineers on service testing patterns, debugging approach, and practical automation design
  • Partner with developers on triage and root-cause analysis using logs, traces, and request/response evidence
Read More
Arrow Right

Senior Full Stack Developer

Betstamp is the future of sports betting. We were founded in 2020 to make sports...
Location
Location
Canada , Toronto
Salary
Salary:
Not provided
betstamp.app Logo
Betstamp
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • History of success managing back-end & infrastructure projects
  • 3-5+ years building production systems in Go / Python (Django a plus)
  • Can craft modern UIs in React (web) or React Native (mobile)
  • Know your way around SQL performance tuning and RESTful API design
  • Enjoy working in an early-stage, ship-fast, own-your-stuff environment
Job Responsibility
Job Responsibility
  • Lead DevOps infrastructure growth as we scale our products
  • Control the design of new and exciting features involving both backend / frontend work
  • Set up and manage external APIs interacting with betstamp’s backend
  • Optimize database queries and endpoint speed
  • Build analytic features to analyze betstamp’s backend data
  • Own end-to-end features – scope, architect, and ship full-stack projects across web and mobile
  • Surface the best bets – design blazing-fast APIs that crunch market data and return +EV opportunities in milliseconds
  • Scale our data engine – optimize Postgres queries, design new schemas, and keep our odds ingestion pipeline rolling
  • Integrate new partners – wire up external sportsbook and promo APIs so users always see the freshest lines and bonuses
  • Turn data into insight – build analytics dashboards that help bettors (and Betstamp) learn, iterate, and win
What we offer
What we offer
  • Competitive salary & raises – share in the upside you build
  • Autonomy & influence – you’ll make architectural calls, not just tickets
  • Gear & learning stipend – get the tools and courses that level you up
  • AI-Augmentation - free reign on testing & spending on the AI tools of the future to help you excel
  • World-Class betting tools - get access to our best tools that professional bettors use, for FREE
  • Sports-centric culture – team watch parties, office prop pools, and the inside scoop on sharp bets
  • Fulltime
Read More
Arrow Right

Senior Back-end Engineer (Machine Learning)

Uber Direct is the white-label delivery engine of Uber, empowering enterprise re...
Location
Location
United States , New York
Salary
Salary:
202000.00 - 224000.00 USD / Year
uber.com Logo
Uber
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor's degree in Computer Science, or related technical field, or equivalent practical experience
  • 5+ years of experience as a Back-end Engineer
  • Demonstrated success shipping production-grade applications using Go (Golang) and Python
  • Strong experience with distributed systems and microservices architecture at scale
Job Responsibility
Job Responsibility
  • Design and Scale APIs: Lead the development of high-performance public-facing APIs and internal microservices that power the integration between global merchants and Uber’s logistics engine
  • Solve High-Scale Challenges: Work alongside world-class engineers to derive elegant solutions for complex, distributed systems problems involving high-throughput data and low-latency requirements
  • Integrate Intelligent Systems: Collaborate with data scientists to integrate machine learning models into production back-end services, ensuring seamless real-time execution
  • Own Operational Excellence: Take full end-to-end ownership of the reliability, performance, and monitoring of the services you build, ensuring they meet Uber’s rigorous production standards
  • Drive Quality Metrics: Engineer backend solutions that directly move the needle on core business KPIs, including Completion Rate, On-Time Rate, and Defect Rate through optimized routing and prediction logic
What we offer
What we offer
  • Eligible to participate in Uber's bonus program
  • May be offered an equity award & other types of comp
  • All full-time employees are eligible to participate in a 401(k) plan
  • Eligible for various benefits
  • Fulltime
Read More
Arrow Right

Senior Back-End Engineer

We're looking for a Senior Back-End Engineer with strong expertise to architect ...
Location
Location
Netherlands , Utrecht
Salary
Salary:
Not provided
zerotier.com Logo
ZeroTier
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Senior level experience building and owning distributed systems at scale
  • Advanced knowledge of Go service development and backend best practices
  • Willingness to work occasionally on modern web technologies and frontend frameworks
  • Extensive experience integrating with and extending backend REST APIs
  • Experience working in a team with a continuous improvement and learning mindset
  • Demonstrated application of security best practices in public facing services
  • Ability to write clear technical documentation and communicate effectively with team members
  • Experience in a startup or fast-paced environment is a strong plus
Job Responsibility
Job Responsibility
  • Build, ship and iterate on API endpoints and backend services in Go, turning our product ideas into reliable platform features
  • Own the design and evolution of the public and internal APIs, ensuring speed, scalability and long term maintainability
  • Collaborate closely with other engineers to power great user experiences in our Central Portal
  • Develop and operate backend systems using PostgreSQL, PubSub, and OpenFGA, and other cloud-native services
  • Bake in security, testing and quality from day one to keep our public services safe and dependable as we scale
  • Improve and maintain our CI/CD pipelines and observability, helping the team catching issues more quickly and move fast with confidence
  • Act as a senior technical reference in the team, through code reviews, hands-on mentorship and fostering pragmatic engineering decisions and thoughtful architectural decisions
What we offer
What we offer
  • Competitive salary
  • Hybrid work environment: we work 3 days at our office at Utrecht Central Station and 2 days from home
  • Equity compensation package
  • Retirement savings plan with employer contribution
  • 25-holiday days PTO per year
  • Flexible work hours (subject to management approval)
  • Career Enhancement Funds
  • Employee Referral Bonus
  • Fulltime
Read More
Arrow Right

Fullstack Software Engineer - AI Customer Support

You would join the “Support Area”, in charge of building smart products offering...
Location
Location
Salary
Salary:
Not provided
alan.com Logo
Alan
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Strong background in software engineering, systems architecture, with a spike in back-end engineering
  • Experience with traditional ML, or LLMs, or voice AI systems is a big plus
  • Product-minded: you want your solutions to be used, impactful and member-centric
  • Self-directed and pragmatic
  • Humble and still willing to grow (no matter your seniority!)
  • Collaborative, enthusiastic about teamwork, learning, and teaching
  • Fluent in English (no need to speak French!)
  • At least 3+ years of experience
  • High potential and curiosity
Job Responsibility
Job Responsibility
  • Implement new conversational experiences, working across engineering, data, and insurance expertise
  • Work on making our systems and product scale, going from the support of 1M+ members to 10M+ members
  • Have significant influence on system architecture and code quality
  • Mentor engineers, contribute to our product & engineering culture, and help build the team (including participating in hiring, shaping our interview loops, etc.)
What we offer
What we offer
  • Remote work flexibility
  • Stimulating environment and perks ensuring they are happy, efficient and spend only high-quality time with co-workers
  • Fulltime
Read More
Arrow Right

Python Intern (Back-end)

Welcome to Golden Owl Solutions - an environment full of youthful, dynamic and c...
Location
Location
Vietnam , Ho Chi Minh City
Salary
Salary:
Not provided
goldenowl.asia Logo
Golden Owl Solutions
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 4th-year students or fresh graduates in Computer Science, Software Engineering, IT or related major
  • Personal laptop required
  • Can work full-time at GO office
  • 4-month internship commitment
  • 15 months working after internship commitment
  • Strong background knowledge of HTML, CSS, OOP, database, and Python as a back-end programming language
Job Responsibility
Job Responsibility
  • Work under coaching of team leader or senior developers
  • Practice coding with high quality and effective outputs
  • Estimate tasks and implement tasks, following quality guidelines and time plan of the project
  • Report task progress daily
  • Support other team members (PC and QC, team lead, other engineers)
What we offer
What we offer
  • Monthly allowance + Parking allowance
  • Team-building, Tea break monthly
  • On-job training
  • English training
  • Opportunity to be promoted to a full-time position after an internship
  • Fulltime
Read More
Arrow Right