CrawlJobs Logo

Senior Backend Engineer

bolt.eu Logo

Bolt

Location Icon

Location:
Romania , Bucharest

Category Icon
Category:
IT - Software Development

Job Type Icon

Contract Type:
Not provided

Salary Icon

Salary:

Not provided
Save Job
Save Icon
Apply Position

Job Description:

We are looking for an experienced Senior Backend Software Engineer to work on unique product challenges: complex algorithms for demand prediction, optimal real-time pricing, routing, fraud detection, distributed systems and much more. Volumes are growing at a steady pace.

Job Responsibility:

  • Architecting, designing, developing, and deploying Bolt's growing backend systems (coding mostly in Node.js and TypeScript)
  • Contributing ideas and constructive feedback to our product development roadmap
  • Collaborating with key internal stakeholders to determine how to scalably design backend systems and APIs to meet their needs
  • Helping lead features/initiatives from idea to positive execution
  • Working closely with Product to slice and dice scope and deliver piece by piece
  • Sharing your knowledge by giving tech talks, and promoting appropriate tech and engineering best practices in and outside of the team

Requirements:

  • You have experience of thriving in an environment that has a fast customer-feedback cycle and having empathy for the end-user
  • You are great at making data-driven and metric-driven decisions
  • You have a drive for leading initiatives and features till the end, even if the last mile is the hardest
  • You feel at home with microservice architecture and you are experienced in API design
  • You have strong principles towards writing clean, simple, secure, and maintainable code
  • You possess solid understanding of algorithms and data structures
  • At Bolt, using AI daily is a baseline expectation for everyone
What we offer:
  • Accelerate your professional growth with unique career opportunities
  • Enjoy a rewarding salary and stock options
  • Take care of your physical and mental health with our wellness perks
  • Celebrate 5 years at Bolt with a 1-month paid sabbatical to recharge
  • Connect with colleagues at annual company events and smaller team gatherings
  • Balance flexibility and in-person collaboration with our hybrid model

Additional Information:

Job Posted:
May 05, 2026

Employment Type:
Fulltime
Work Type:
Hybrid work
Icon
Bolt - 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 Senior Backend Engineer

Senior Backend Engineer

As a Senior Backend Engineer, you will play a crucial role in leading the develo...
Location
Location
United States
Salary
Salary:
153000.00 - 188000.00 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
  • 5+ 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/Scala and/or Go
  • Knowledge of Relational and NoSQL databases
  • Experience adopting & using Agile development methodologies
  • Excellent communication skills
  • Bachelor's degree in Computer Science or related fields, or equivalent experience
Job Responsibility
Job Responsibility
  • Work in an Agile development team to design and deliver service features end-to-end from design to production deployment and monitoring
  • Design, develop and operate scalable, elastic and secure microservices based on serverless architectures
  • Design, develop and maintain robust and scalable Machine Learning and Data Analytics pipelines
  • 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
  • Evangelize and drive adoption of software development best practices in code health, quality, test stability and maintainability
What we offer
What we offer
  • Equity and additional benefits
  • Commission-based or discretionary bonus
  • Fulltime
Read More
Arrow Right

Senior Backend Software Engineer

Location
Location
India , Bengaluru
Salary
Salary:
Not provided
https://www.atlassian.com Logo
Atlassian
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 6+ years of experience building and developing backend applications
  • Bachelor's or Master's degree with a preference for Computer Science degree
  • Experience crafting and implementing highly scalable and performant RESTful micro-services
  • Proficiency in any modern object-oriented programming language (e.g., Java, Kotlin, Go, Scala, Python, etc.)
  • Fluency in any one database technology (e.g., RDBMS like Oracle or Postgres and/or NoSQL like DynamoDB or Cassandra)
  • Demonstrated ability to design and operate systems that deliver high availability and unwavering reliability for our customers
  • Real passion for collaboration and strong interpersonal and communication skills
  • Broad knowledge and understanding of SaaS, PaaS, IaaS industry with hands-on experience of public cloud offerings (AWS, GCP, Azure)
  • Familiarity with cloud architecture patterns and an engineering discipline to produce software with quality
Job Responsibility
Job Responsibility
  • Design, develop, and maintain robust backend systems and components focused on proactive and reactive incident management and post-incident management
  • Be part of an amazing open and collaborative work environment with other experienced engineers, process engineers, architects, and TPMs
  • Review code with best practices of readability, testing patterns, documentation, reliability, security, and performance considerations in mind
  • Leverage data to generate actionable insights that drive continuous improvements in backend performance and incident management processes
  • Mentor and level up the skills of your teammates by sharing your expertise in formal and informal knowledge sharing sessions
  • Ensure full visibility, error reporting, and monitoring of high performing backend services
  • Participate in Agile software development including daily stand-ups, sprint planning, team retrospectives, show and tell demo sessions
  • Fulltime
Read More
Arrow Right

Senior LLM Backend Engineer

We are looking for a Senior Backend Engineer with a strong focus on Large Langua...
Location
Location
Spain
Salary
Salary:
Not provided
bark.com Logo
Bark
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Extensive production experience with Python in backend engineering
  • Proven experience integrating LLMs into applications via APIs or SDKs
  • Strong experience building and maintaining APIs for LLM-based features
  • Strong experience building and maintaining event-driven workflows
  • Strong experience building and maintaining business logic that consumes AI outputs
  • Strong experience building and maintaining integrations with 3rd party AI/ML platforms
  • Solid SQL and NoSQL experience (especially in AI data pipelines)
  • Production experience with Docker, ideally with Kubernetes or AWS Fargate/ECS/EKS
  • Experience deploying and maintaining AI services in cloud environments
  • Strong organisational skills and ability to deliver in a fast-paced, product-focused environment
Job Responsibility
Job Responsibility
  • Work with product managers to understand user needs and translate them into AI-powered functionality
  • Design and build APIs, services, and workflows that integrate LLMs (both proprietary and open-source)
  • Implement prompt engineering, RAG pipelines, and model fine-tuning where required
  • Optimise AI inference performance, scalability, and cost-effectiveness
  • Ensure AI features meet high standards for security, reliability, and maintainability
  • Collaborate with other engineers to integrate AI features seamlessly into the wider system
  • Stay on top of emerging LLM technologies and best practices, running experiments and sharing knowledge across the team
What we offer
What we offer
  • Fully remote working
  • Personal annual L&D Budgets with 600€ to spend on your development
  • Being at the forefront of an industry with new and exciting problems to solve
  • Fulltime
Read More
Arrow Right

Senior Software Engineer, Backend

Kiddom is a groundbreaking educational platform that promotes student equity and...
Location
Location
United States , San Francisco
Salary
Salary:
160000.00 - 220000.00 USD / Year
kiddom.co Logo
Kiddom
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • BS or MS in Computer Science or a related field
  • 6+ years professional software engineering experience
  • Experience scaling integration systems
  • Proficiency in working with databases (SQL & NoSQL) such as PostgreSQL, MySQL, MongoDB, or Redis
  • Experience with cloud platforms like AWS, GCP, or Azure, and containerization tools like Docker and Kubernetes
  • Experience with microservices architecture and distributed systems
  • Strong knowledge of design patterns and software engineering best practices
  • You've been through the planning, launching and refactoring phases of code you wrote
  • Excellent problem solving and debugging skills
  • Ability to work as part of a collaborative team in a fast-paced environment
Job Responsibility
Job Responsibility
  • Design, develop, and maintain backend services, APIs, and databases
  • Ensure the scalability, security, and performance of backend systems
  • Collaborate with frontend engineers, product managers, and other stakeholders to deliver high-quality features
  • Optimize applications for performance, reliability, and scalability
  • Conduct code reviews and provide mentorship to junior engineers
  • Troubleshoot and resolve production issues, ensuring system uptime and reliability
  • Work with our customers to troubleshoot issues and bugs and also help with Kiddom onboarding
What we offer
What we offer
  • The opportunity to make a measurable impact in K-12 education
  • Competitive salary and equity in a hyper-growth, mission-driven organization
  • Full health benefits: medical, dental, and vision
  • Flexible vacation policy
  • 401k
  • An inclusive, positive team culture
  • A passionate, collaborative team obsessed with building transformative education technology
  • Meaningful equity
  • Health insurance benefits: medical (various PPO/HMO/HSA plans), dental, vision, disability and life insurance
  • One Medical membership (in participating locations)
  • Fulltime
Read More
Arrow Right

Senior Backend Engineer

Build the execution layer powering the next generation of intelligent systems. W...
Location
Location
United States , New York
Salary
Salary:
Not provided
weareorbis.com Logo
Orbis Consultants
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Strong backend/system design experience, with production ownership
  • Proficiency in Rust (or another systems language with willingness to ramp up)
  • Solid SQL skills and experience with PostgreSQL or similar relational DBs
  • Experience with distributed systems patterns: messaging, retries, idempotency, state
  • Familiarity with Redis, real-time delivery (SSE/WebSockets), and pub/sub systems (Kafka or NATS)
  • Understanding of auth/authz, multi-tenancy, and secure API design
  • Comfortable working in a fast-paced, on-site environment with tight feedback loops
Job Responsibility
Job Responsibility
  • Design and build Rust-first backend services for executing and managing graph/DAG-based workflows
  • Own job orchestration systems with multiple execution modes: blocking, streaming, fire-and-forget
  • Implement core features for idempotency, replay, backpressure, and retries
  • Strengthen platform-wide tenant isolation, access control, and security
  • Optimise PostgreSQL schemas, indexing, and query performance
  • own data migrations
  • Ship reliable, observable systems with strong telemetry and operational tooling
  • Partner with product, frontend, and data teams to ship production-ready features quickly
What we offer
What we offer
  • Equity
  • Full benefits & perks
  • Visa sponsorship available
  • Fulltime
Read More
Arrow Right

Senior Software Engineer - Backend

We build simple yet innovative consumer products and developer APIs that shape h...
Location
Location
United States , San Francisco
Salary
Salary:
180000.00 - 270000.00 USD / Year
plaid.com Logo
Plaid
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5+ years of experience with extensive experience in software engineering with a proven track record of shipping successful projects
  • Experience with MySQL or other relational databases
  • Experience working with microservices
  • Excellent coding, testing, and system design skills
  • Prior experience with cross functional collaboration, communication and project management skills
  • Demonstrated leadership skills and the ability to mentor and guide junior engineers
  • Ability to work with operations, product, design, and data science
Job Responsibility
Job Responsibility
  • Design & Development: Build and maintain backend services with a focus on performance, reliability and scalability
  • Collaboration: Work closely with product managers and other stakeholders to define and implement new features that meet product and customer needs
  • Code Quality: Write clean, maintainable and efficient code
  • Testing & Debugging: Develop automated tests to ensure the quality and reliability of the codebase. Troubleshoot and resolve issues
  • Engage in hands-on coding and architectural design, setting and maintaining high technical standards for a high performing team
  • Grow the team via mentorship and leadership, reviewing technical documents and code changes
What we offer
What we offer
  • medical
  • dental
  • vision
  • 401(k)
  • Fulltime
Read More
Arrow Right

Senior Software Engineer - Backend

We build simple yet innovative consumer products and developer APIs that shape h...
Location
Location
United States , New York
Salary
Salary:
180000.00 - 270000.00 USD / Year
plaid.com Logo
Plaid
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5+ years of experience with extensive experience in software engineering with a proven track record of shipping successful projects
  • Experience with MySQL or other relational databases
  • Experience working with microservices
  • Excellent coding, testing, and system design skills
  • Prior experience with cross functional collaboration, communication and project management skills
  • Demonstrated leadership skills and the ability to mentor and guide junior engineers
  • Ability to work with operations, product, design, and data science
Job Responsibility
Job Responsibility
  • Design & Development: Build and maintain backend services with a focus on performance, reliability and scalability
  • Collaboration: Work closely with product managers and other stakeholders to define and implement new features that meet product and customer needs
  • Code Quality: Write clean, maintainable and efficient code
  • Testing & Debugging: Develop automated tests to ensure the quality and reliability of the codebase. Troubleshoot and resolve issues
  • Engage in hands-on coding and architectural design, setting and maintaining high technical standards for a high performing team
  • Grow the team via mentorship and leadership, reviewing technical documents and code changes
What we offer
What we offer
  • medical
  • dental
  • vision
  • 401(k)
  • Fulltime
Read More
Arrow Right

Senior Software Engineer (Backend)

Tekmetric is looking for a Senior Software Engineer (Backend) to take part in th...
Location
Location
Salary
Salary:
Not provided
tekmetric.com Logo
Tekmetric
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5+ years software engineering experience
  • Experience with Java and SQL databases (2+ years)
  • Enjoy working in fast moving and dynamic environments
  • High standards and a strong work ethic
  • Strong product sense and communication skills
  • Experience working cross-functionally and can work within ambiguity
  • Enjoy bringing innovation and impact to customers
Job Responsibility
Job Responsibility
  • Design and implement scalable services and applications that enable positive user experiences and measurable business growth
  • Provide implementation estimates and evaluations of different solutions
  • Collaborate with and across agile teams to design, develop, test, and support technical solutions
  • Ensure application performance, uptime, and scale, maintaining high standards of code quality and thoughtful application design
  • Manage the end-to-end life cycle on the development of new features
  • Provide technical leadership, mentorship and growth to junior team members as we scale
What we offer
What we offer
  • Flexibility of remote work
  • Competitive base salaries
  • Generous Paid Time Off
  • Paid maternity, parental bonding, and medical leave
  • Comprehensive health benefits (Medical, Dental, Vision, Prescription)
  • Free, confidential counseling through BetterHelp
  • 401(k) Retirement Savings Plan with 100% employer match on contributions up to 6%
  • Flexible Spending Accounts (FSA) and Health Savings Accounts (HSA)
  • Life and Accidental Death & Dismemberment (AD&D) Insurance
  • Up to $60/month toward fitness or mental health
Read More
Arrow Right