CrawlJobs Logo

Lead Backend Engineer

tonsser.com Logo

Tonsser

Location Icon

Location:

Category Icon
Category:
IT - Software Development

Job Type Icon

Contract Type:
Not provided

Salary Icon

Salary:

80000.00 - 90000.00 EUR / Year
Save Job
Save Icon
Apply Position

Job Description:

Tonsser is on a mission to redefine youth sports. Hundreds of thousands of young athletes across Europe already use Tonsser to track their performance, get discovered, and feel part of something bigger than the next match. We're now starting our most ambitious chapter yet, a new project that will reshape an entire category, and we're looking for a Lead Backend Engineer to help us build it.

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

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

Nice to have:

Experience with consumer-scale mobile backends, GraphQL, or Kotlin Multiplatform

What we offer:

Remote work across Europe

Additional Information:

Job Posted:
May 16, 2026

Employment Type:
Fulltime
Work Type:
Remote work
Icon
Tonsser - All Job Offers
Job Link Share:
Copy Link Icon
Facebook Icon Twitter Icon LinkedIn Icon

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

Briefcase Icon

Similar Jobs for Lead Backend Engineer

Lead Backend Engineer

As a Lead Backend Engineer, you will play a crucial role in leading the developm...
Location
Location
United States
Salary
Salary:
184000.00 - 229000.00 USD / Year
https://corelight.com/ Logo
Corelight
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Strong appreciation and support for our core values: low ego results, tireless service, and applied curiosity
  • 7+ years of professional software development experience
  • Experience building REST APIs / GraphQL to support a rich data-heavy visual user interface
  • Experience using AWS Services (Lambda, AppSync, API Gateway) or equivalent
  • Experience with Python, Java and/or Go
  • Knowledge of Relational and NoSQL databases
  • Experience using Docker, Kubernetes, and containerized microservices
  • Experience adopting & using Agile development methodologies
  • Excellent communication skills. You thrive by collaborating with multiple teams and use your communication skills to influence product directions
  • Bachelor's degree in Computer Science or related fields, or equivalent experience
Job Responsibility
Job Responsibility
  • Lead the technical design discussions within the team and collaborate with other teams across the organization
  • Design, develop and operate scalable, elastic and secure microservices based on serverless architectures
  • Build REST APIs / GraphQL services to interface with large datasets and analytics using AWS technologies and services like AWS Lambda, API Gateway, DynamoDB, S3, and Cloudwatch
  • Work in an Agile development team to design and deliver service features end-to-end from design to production deployment and monitoring
  • Evangelize and drive adoption of software development best practices in code health, quality, test stability and maintainability
  • Work closely with offshore teams on various development projects
  • Fulltime
Read More
Arrow Right

Senior Backend Engineer - Tech Lead

Senior Backend Engineer - Tech Lead role at Hewlett Packard Enterprise/Zerto, fo...
Location
Location
Israel , Herzliya
Salary
Salary:
Not provided
https://www.hpe.com/ Logo
Hewlett Packard Enterprise
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Experienced and innovative problem-solver
  • Proven experience leading big features & designs from rough ideas to requirements up to development & production
  • At least 5 years of C/C++ experience in a multi-threaded performance-critical programming
  • At least 2 years of kernel space programming
  • Excellent communication and collaboration skills, especially in cross-functional environments
Job Responsibility
Job Responsibility
  • Own the technical quality, design, and roadmap for your domain(s)
  • Drive engineering best practices through design reviews, code reviews, and technical mentoring
  • Collaborate with Product Leads on prioritization, backlog, and feasibility decisions
  • Contribute to architectural discussions and cross-domain alignment
  • Partner with managers to shape hiring decisions, provide feedback/input for performance reviews, and contribute to other team-related decisions
  • Foster a culture of learning, innovation, and technical excellence
  • Tackle technical challenges - performance, fault-tolerance, and live production issues
What we offer
What we offer
  • Health & Wellbeing benefits
  • Personal & Professional Development programs
  • Unconditional Inclusion environment
  • Comprehensive suite of benefits supporting physical, financial and emotional wellbeing
  • Fulltime
Read More
Arrow Right

Senior Backend Engineer - Tech Lead

We're looking for an experienced and motivated Senior Backend Engineer - Tech Le...
Location
Location
Israel , Herzliya
Salary
Salary:
Not provided
https://www.hpe.com/ Logo
Hewlett Packard Enterprise
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 7+ years of experience in backend software development
  • Strong background in SaaS architecture and cloud-native technologies
  • Proficiency in programming languages: Go, .NET, TypeScript and Node.js
  • Experience with CI/CD pipelines, microservices, and containerization (Docker, Kubernetes)
  • Ability to take ownership of features from design through implementation and delivery
  • Excellent communication skills and the ability to work collaboratively across functions
  • Experience with monitoring, observability, and operational excellence in production environments
  • Experience mentoring others will be considered an advantage
Job Responsibility
Job Responsibility
  • Drive the design, development, and delivery of scalable SaaS solutions with high availability and performance
  • Develop and maintain backend services, fostering a culture of ownership, collaboration, and continuous improvement
  • Ensure adherence to software development best practices, including code reviews, testing, documentation and knowledge sharing
  • Contribute to architectural decisions and long-term technical vision
  • Execute technical tasks for key initiatives, ensuring alignment with product goals
  • Collaborate with POs, DevOps, QA, Security and other cross-functional teams to deliver features on time and with high quality
  • Mentor junior developers by guiding their technical growth, CRs and supporting them in conducting research and implementing high-quality solutions
  • Analyze and troubleshoot customer escalations, identify root causes, and drive timely, effective solutions to ensure product reliability and customer satisfaction
What we offer
What we offer
  • Health & Wellbeing
  • Personal & Professional Development
  • Unconditional Inclusion
  • Fulltime
Read More
Arrow Right

Senior Backend Engineer / Tech Lead (Data Management)

As a Senior Backend Software Engineer at Aignostics, you work hand in hand with ...
Location
Location
Germany , Berlin
Salary
Salary:
Not provided
aignostics.com Logo
Aignostics
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor and/or Master in a relevant field or extensive work experience
  • 6+ years of software development experience in a data intensive environment
  • Experience leading a technical initiative ideally with cross-team impact
  • Strong background in software development ideally with Python
  • Experience with cloud providers (GCP, AWS) and their services
  • Experience with container orchestration (preferable Kubernetes)
  • Experience with database systems
  • Familiar with CI/CD pipelines, code reviews and other standards to keep up code quality
  • Driven self-starter, well-organized, excellent communication skills and a strong team player
Job Responsibility
Job Responsibility
  • Design and develop services and core libraries that enable our SaaS platform
  • Ensure reliable, high throughput access to our data for machine learning
  • Maintain and expand our data management infrastructure
  • Lead initiatives, evaluate new technologies and their integration into our current codebase
  • Eagerness to take ownership - from inception to completion - without losing focus on the business context
  • Communicate closely with our frontend and machine learning teams
  • Perform code reviews, considering readability, design and performance
What we offer
What we offer
  • Learning & Development yearly budget of 1,000€ (plus 2 L&D days)
  • Language classes and internal development programs
  • Mentoring program
  • Flexible working hours and teleworking policy
  • 30 paid vacations days per year
  • Family & pet friendly and support flexible parental leave options
  • Subsidized membership of your choice among public transport, sports and well-being
  • Social gatherings, lunches, and off-site events
  • Optional company pension scheme
Read More
Arrow Right

Scala Backend Software Engineer, Senior / Lead

To sustain the company's growth, Ledger is looking for new talents. You will sta...
Location
Location
France , Paris
Salary
Salary:
Not provided
https://www.ledger.com Logo
Ledger
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Experienced engineer and continuous learner with 6+ years of relevant engineering experience
  • 2+ years of technical leadership experience, including effective communication of complex concepts and cross-team coordination to ship critical products
  • Advanced Scala proficiency
  • expert-level proficiency, and advanced mastery of a second backend language (e.g., Rust, Java, Python, PHP) is a plus
  • Excellent collaboration and communication skills
  • Experience collaborating closely with QA, product management, and key stakeholders to develop and deliver on a shared vision
  • Led development of complex, high-performance interactive browser applications, including architecture, infrastructure, and optimization
  • Experience with various web architecture patterns (e.g., Microservices, Event-Driven, P2P)
  • Ability to apply and adapt software engineering best practices to the engineering environment
  • Experience in the Web3 ecosystem and in a project involving blockchain fundamentals
Job Responsibility
Job Responsibility
  • Develop and maintain high-performance, resilient microservices and APIs to power Ledger's products, including integrations with staking, yield, DeFi services, and blockchain explorers
  • Contribute to the architecture, design, and implementation of scalable solutions, proactively identifying and addressing technical challenges
  • Ensure software quality through testing, documentation, and performance optimization, including monitoring and alerting systems
  • Enhance and maintain CI/CD pipelines to secure and streamline deployment workflows
  • Provide technical leadership and mentorship, collaborating across teams to deliver impactful projects and improve engineering standards
  • Drive innovation by identifying opportunities for improvement, contributing to a shared knowledge base, and participating in technical outreach
  • Manage projects effectively, respecting deadlines, priorities, and deliverables.
What we offer
What we offer
  • Equity: Employees are the foundation of our success, and we award stock options so you can share in that success as we grow
  • Flexibility: A hybrid work policy
  • Social: Annual company outing for Ledgerdary Days, plus frequent social events, snacks and drinks
  • Medical: Comprehensive health insurance policy offering extensive medical, dental and vision care coverage
  • Well-being: Personal development, coaching & fitness with our dedicated partners
  • Vacation: Five weeks of paid leave per year, in addition to national holidays and rest & relaxation (RTT) days
  • High tech: Access to high performance office equipment and gadgets
  • Transport: Ledger reimburses part of your preferred means of transportation
  • Discounts: Employee discount on all our products.
  • Fulltime
Read More
Arrow Right

Senior Backend Lead Engineer

Senior engineer role focused on building application security cloud solutions at...
Location
Location
Israel , Tel Aviv
Salary
Salary:
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Hands-on experience developing high-performance solutions following Agile methodologies
  • Backend Java experience
  • Expertise in cloud engineering and application security
  • Familiarity with GoLang, Node.js UI authentication
  • Good understanding of security capabilities supporting application development (authentication, authorization, credential management, certificate management, encryption)
  • Understanding of container orchestration technologies
  • Containers K8s hands-on experience
  • Experience in building end-to-end solutions for the cloud domain in a secure manner
  • Ability to write documentation in a diligent manner and lead elements in projects independently
Job Responsibility
Job Responsibility
  • Technical engineer working with key stakeholders of cloud engineering and application security experts
  • Explore and resolve key application security gaps and drive their resolutions
  • Develop modules that resolve identified gaps in a centralized optimized manner (credential management, authentication, authorization, end-to-end scanning tools)
  • Act as an advisor and expert lead to various development teams across the company to help them improve their expertise within cloud engineering and application security
  • Driving delivery of platform capabilities within the cyber domain supporting application needs for on-prem and cloud environments
  • Fulltime
Read More
Arrow Right

Technical Lead Manager - Backend

As a Tech Lead Manager (TLM), you will be in a Onsite role that combines senior ...
Location
Location
India , Pune
Salary
Salary:
Not provided
floqast.com Logo
FloQast
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 8+ years of software engineering experience
  • Proven track record of delivering complex system initiatives with minimal oversight
  • Ability to improve the quality, performance, or scalability of a module or product you own
  • Experience driving consistent improvement in code quality and technical decisions
  • A history of fostering a strong mentorship culture in technical areas
  • Clear influence in architecture across teams within a product
Job Responsibility
Job Responsibility
  • Own the architecture and execution of major systems
  • Lead by example in coding, code reviews, and design
  • Manage a small team of 3–6 engineers
  • Balance hands-on work with team leadership (approximately 50/50)
  • Coach your team on engineering practices and technical growth
  • Fulltime
Read More
Arrow Right

Backend Engineer

A backend engineer at Hebbia blends expertise in systems, application layer soft...
Location
Location
United States , New York City; San Francisco
Salary
Salary:
160000.00 - 300000.00 USD / Year
hebbia.ai Logo
Hebbia
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor's or Master's degree in Computer Science, Data Science, Statistics, or a related field
  • 5+ years software development experience at a venture-backed startup or top technology firm, with a focus on backend software engineering
  • Proficiency in building backend and API systems using technologies such as Python, Java, or Go
  • Extensive experience with cloud platforms (e.g., AWS)
  • Working experience with one or more of the following: Kafka, ElasticSearch, PostgreSQL, and/or Redis
  • Ability to analyze complex problems, propose innovative solutions, and effectively communicate technical concepts to both technical and non-technical stakeholders
  • Proven experience in leading software development projects and collaborating with cross-functional teams
  • Enthusiasm for continuous learning and professional growth
  • Embraces rapid prototyping with an emphasis on user feedback
  • Autonomous and excited about taking ownership over major initiatives
Job Responsibility
Job Responsibility
  • Own critical system components
  • Unlock O(1) universal indexing
  • Build and iterate on our high-scale document build system
  • Drive performance optimization
  • Architect and implement performance-tuning solutions
  • Mentor and guide
  • Provide technical leadership, mentorship, and guidance to junior engineers
What we offer
What we offer
  • PTO: Unlimited
  • Insurance: Medical + Dental + Vision + 401K
  • Eats: Catered lunch daily + doordash dinner credit if you ever need to stay late
  • Parental leave policy: 3 months non-birthing parent, 4 months for birthing parent
  • Fertility benefits: $15k lifetime benefit
  • New hire equity grant: competitive equity package
  • Fulltime
Read More
Arrow Right