Senior Backend Engineer

Senior Distributed Systems Engineer - Ad Display Platform Engineering

The Bidding Platform organization is the core of the RTB business, processing ov...

Location

Poland

Salary:

Not provided

RTB House

Expiration Date

Until further notice

Requirements

7+ years of hands-on experience in software engineering
Proficiency in programming
Excellent understanding of how complex IT systems work (from the hardware level, through software, to algorithmics)
Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others)
Good knowledge of basic methods of creating concurrent programs and distributed systems (from thread level to geo-distributed clusters level)
Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it)
The ability to critically analyze the solutions created in terms of performance (from estimating the theoretical performance of the designed systems to detecting and removing actual performance problems in production)
General knowledge of issues (typical problems and methods of solving them) in the areas of 'high scalability' and 'high availability'
C1 level in English and Polish

Job Responsibility

Implement and maintain (in all aspects, including setting up environment, writing configuration code, monitor production) high-quality backend services for displaying Ads globally, focusing on extreme performance and scalability
Develop tools (deployment, testing platforms, web performance and reliability monitoring), and critical optimizations to drive measurable improvements in critical user performance metrics for ad rendering and display
Write, test, and deploy robust, efficient, and well-documented code in Java/Python, ensuring adherence to the highest coding and performance standards
Participate in code reviews, knowledge sharing sessions, and help implement technical standards and best practices within the team

What we offer

Projects focused on extreme performance and high code quality – solid code reviews are our standard
Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers)
Hardware and software tailored to your preferences (e.g., MacBook, AI tool licenses)
Flexible working conditions – no core hours, fully remote cooperation possible

Senior Backend Engineer Software

We are looking for a Senior Backend Engineer to join our Cortex Platform team an...

Location

Israel , Tel Aviv

Salary:

Not provided

Palo Alto Networks

Expiration Date

Until further notice

Requirements

BSc in Computer Science or equivalent knowledge or equivalent military experience required
4+ years of software engineering experience
Experience in distributed cloud products
Experienced with a variety of database technologies (Mysql / Cassandra / Google BigQuery Amazon Redshift / ElasticSearch / Neo4J)
Experience in designing, building and maintaining a scalable server–side application
Knowledge of the cyber field

Job Responsibility

Design and build an infrastructure that supports billions of events per second, storing, processing and making them accessible and visible to the user while collaborating with the industry's leading cyber products
Be responsible for the complete software development life cycle including requirement analysis, design, development, deployment, and support
Write clean, testable, readable, fast and maintainable code that is efficient and scalable

What we offer

FLEXBenefits wellbeing spending account with over 1,000 eligible items selected by employees
Mental and financial health resources
Personalized learning opportunities

Senior Software Engineer, Backend

Affirm is reinventing credit to make it more honest and friendly, giving consume...

Location

Canada

Salary:

150000.00 - 200000.00 CAD / Year

Affirm

Expiration Date

Until further notice

Requirements

4+ years of experience designing, developing and launching backend systems at scale using languages like Python or Kotlin
track record of developing highly available distributed systems using technologies like AWS, MySQL and Kubernetes
familiar with processing data offline using frameworks like Spark or Ray
knowledge of stream processing architectures and ability to bridge the gap between online and offline systems with hybrid designs
experience defining a technical plan for the delivery of a significant feature or system component with an elegant, simple and extensible design
write high quality code that is easily understood and used by others
proficient at making significant changes in a large code base, and have developed a suite of tools and practices that enable you and your team to do so safely
experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders
strong verbal and written communication skills that support effective collaboration with our global engineering team

Job Responsibility

own and deliver quarterly goals for your team, lead engineers on your team through ambiguity to solve open-ended problems, and ensure that everyone is supported throughout delivery
support peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs
proactively identify project, process, technology or business issues, advocate for them, and lead in solving them
support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts
foster a culture of quality and ownership on your team by setting or improving code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks
help develop talent on your team by providing feedback and guidance, and leading by example

What we offer

monthly stipends for health, wellness and tech spending
100% subsidized medical coverage, dental and vision for you and your dependents
equity rewards
flexible Spending Wallets - generous stipends for spending on Technology, Food, various Lifestyle needs, and family forming expenses
competitive vacation and holiday schedules
employee stock purchase plan enabling you to buy shares of Affirm at a discount

Fulltime

Senior Product Engineer (Backend)

Plain is redefining customer support for the next generation of B2B companies. W...

Location

United Kingdom , London

Salary:

90000.00 - 130000.00 GBP / Year

Plain

Expiration Date

Until further notice

Requirements

Thrive in early ideation stages, love sharing work-in-progress, and enjoy the balance of making trade-offs in order to ship high impact products
Are impact driven and motivated by seeing customers succeed. You measure the quality of your work by the end-experience of users, not the abstractions or cleanliness of the code
Have a proven track record working for product-led companies, ideally in B2B SaaS
You’re autonomous and able to prioritise your workload. You know when to take a shortcut and when to invest in long-term infrastructure
Have experience working with distributed, serverless systems, and have worked on similar web applications with a high quality and performance bar before
Are equally at home in architectural conversations as you are in customer conversations
Can learn new technologies and paradigms quickly and independently

Job Responsibility

Help set product direction. You’ll contribute to both the technical architecture and the roadmap, balancing customer feedback with long-term product health
Ship features end to end. You’ll scope, build, and launch product features that directly solve customer problems
Shape our backend architecture. You’ll tackle some of our most complex challenges, from data modeling to high-performance reporting, and help set the standard for how we build across the company
Create a stellar developer experience. From data pipelines to APIs, you’ll make sure Plain is not only great to use but also great to build on

What we offer

STOCK OPTIONS

Build the execution layer powering the next generation of intelligent systems. W...

Location

United States , New York

Salary:

Not provided

Orbis Consultants

Expiration Date

Until further notice

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

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

Equity
Full benefits & perks
Visa sponsorship available

Fulltime

Senior Backend Engineer

Kalepa is looking for a Senior Backend Engineer to work on their AI Copilot plat...

Location

Salary:

85000.00 - 155000.00 USD / Year

Kalepa

Expiration Date

Until further notice

Requirements

Minimum of 5+ years of relevant software engineering experience
Excellent development skills including design, debugging and problem solving
Bachelors or master's degree in computer science or a related field
Experience with Python3 (or other OO languages like Java, C++, C#)
Experience with AWS (EC2, Lambda, etc.) and serverless technologies
Experience with relational databases, preference for PostgreSQL
Experience working on distributed systems creating scalable, fault-tolerant infrastructure
Experience building data driven microservices leveraging RESTful API's
Experience with tools like Docker, Git, GitHub, Flask, NumPy, Pandas

Job Responsibility

Work on advanced systems including NLP, firmographic data, entity resolution
Solve problems at the intersection of large and performant data pipelines, distributed systems, machine learning models, and robust infrastructure
Collaborate with a global team of full-stack, data, ML, and DevOps engineers
Build scalable and reliable backend solutions

What we offer

Competitive salary
Significant equity options package
Work with an ambitious, smart, global, and fun team
20 days of PTO a year
Global team offsites
Gym reimbursement
Phone reimbursement
Student stipend

Fulltime

Senior Backend Engineer

Kalepa is upending the commercial insurance industry with its state-of-the-art A...

Location

United States

Salary:

170000.00 - 210000.00 USD / Year

Kalepa

Expiration Date

Until further notice

Requirements

Have a minimum of 5+ years of relevant software engineering experience
Have excellent development skills including design, debugging and problem solving
You possess a bachelors or master's degree in computer science or a related field
We primarily use Python3 however are open to seeing your code in other OO languages (Java, C++, C#, etc)
Experience with AWS as we work with serverless technologies and asynchronous workflow. (EC2, Lambda, etc.)
Have worked with relational databases with a preference for PostgreSQL
Love working on distributed systems creating scalable, fault-tolerant infrastructure
Can build data driven microservices leveraging RESTful API's
Have worked with some of the following tools: Docker, Git, GitHub, Flask, NumPy,Pandas

Job Responsibility

Solve interesting problems at the intersection of large and performant data pipelines, distributed systems, machine learning models, and robust infrastructure
Collaborate with a global team of full-stack, data, ML, and DevOps engineers
Build scalable and reliable backend solutions
Work on advanced systems including NLP, firmographic data, entity resolution, and much more

What we offer

Significant equity options package
20 days of PTO a year
Global team offsites
100% covered PPO medical, 100% covered vision and dental for individuals and families
Healthy living/gym stipend
Mobile phone bill stipend
Continuing education credits
401(k) plan with employer contribution (regardless of employee contribution)

Fulltime

Senior Backend Engineer

Kalepa's AI Copilot platform empowers underwriters to make smarter, faster, and ...

Location

United States , New York

Salary:

185000.00 - 215000.00 USD / Year

Kalepa

Expiration Date

Until further notice

Requirements

Minimum of 5+ years of relevant software engineering experience
Excellent development skills including design, debugging and problem solving
Bachelors or master's degree in computer science or a related field
Experience with Python3 (or other OO languages like Java, C++, C#)
Experience with AWS (serverless technologies, asynchronous workflow, EC2, Lambda)
Experience with relational databases, preference for PostgreSQL
Experience working on distributed systems creating scalable, fault-tolerant infrastructure
Experience building data driven microservices leveraging RESTful API's
Experience with tools like Docker, Git, GitHub, Flask, NumPy, Pandas

Job Responsibility

Work on advanced systems including NLP, firmographic data, entity resolution
Solve problems at the intersection of large and performant data pipelines, distributed systems, machine learning models, and robust infrastructure
Collaborate with a global team of full-stack, data, ML, and DevOps engineers
Build scalable and reliable backend solutions

What we offer

Significant equity options package
20 days of PTO a year
Global team offsites
100% covered PPO medical, 100% covered vision and dental for individuals and families
Healthy living/gym stipend
Mobile phone bill stipend
Continuing education credits
401(k) plan with employer contribution (regardless of employee contribution)

Fulltime

Senior Backend Engineer - Distributed Systems

Verkada

Location:
United States , San Mateo

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:
January 06, 2026

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