דרושים » פיתוח תוכנה » Principal Backend Engineer, Platform Foundations

At Similarweb, we are revolutionizing the way businesses interact with the digital world by revealing to them everything that happens online.

Our unique data and solutions empower over 4,300 customers globally, including industry giants like Google, eBay, and Adidas, to make game-changing decisions that drive their digital strategies.

In 2021, we went public on the New York Stock Exchange, and we continue to reach new heights! Come work alongside Similarwebbers across the globe who are bright, curious, practical and good people.

What Youll Do:
Youll be part of the group responsible for Similarwebs main products. You will impact the work of developers in the group by designing, building and maintaining the core infrastructure of our solution and leading the research and development of new technologies as well as maintaining code standards and practices.

What does the day to day of Infrastructure Engineer at Similarweb look like:

You will be working on Similarwebs core B2B platform that serves tens of thousands of customers, serving hundreds of terabytes in production. Our backend engineers are responsible for the entire data lifecycle - from our endless datatlakes, through choosing the right serving methods and databases, all the way to our api services.

Your role will include:

Design and implement scalable backend services and libraries that are reusable and maintainable, serving as the foundation for various applications across the company.
Build and maintain tools that streamline development workflows, enabling product teams to focus on delivering business value.
Define and promote best practices for code quality, performance, and reliability, ensuring healthy production environments and rapid development cycles.
Lead the adoption and integration of AI tools to assist in code generation, testing, documentation, and debugging, thereby accelerating development processes.
Perform proof-of-concepts (POCs) on emerging technologies, including AI agents and platforms, to assess their applicability and benefits to our development ecosystem.
Drive cross-team technical projects aimed at improving infrastructure scalability, reliability, and developer experience.
Analyze and resolve complex production issues, ensuring minimal downtime and optimal performance.
Contribute to the evolution of our system architecture, ensuring it supports rapid development and scaling needs.

We are the Azure Reliability team; a multidisciplinary engineering organization committed to making Azure the worlds safest and most reliable cloud. For Azures most critical services and products, we apply a Site Reliability Engineering (SRE) approach. Our software engineers work closely with product teams to enhance availability, reliability, observability, and operability across our planet-scale systems.

We prioritize long-term platform improvements through engineering over repetitive manual tasks. Increasingly, we leverage AI to detect anomalies, predict incidents, and automate operational workflows, amplifying our ability to scale reliability across Azure. Our teams contribute to product architecture, share knowledge and code, and focus on building reusable solutions that benefit multiple teams and services.

Were not looking for people who know it all, were looking for those eager to learn it all. If you thrive on collaboration, embrace challenges, and see mistakes as opportunities to grow, wed love to meet you.
Responsibilities

Billions of users across the world rely on our products, and to meet this demand we design and implement world-class distributed systems.

As a Software Engineer in one of our Azure SRE teams, you will be responsible for improving the reliability of key Azure products.

The Azure SRE key focus areas are:



Building reusable automation and processes that help multiple teams meet their reliability goals. Influencing product architecture and roadmaps to ensure customer-experienced reliability is a core design principle.
Contributing directly to product code to achieve reliability outcomes. Leveraging AI to proactively detect anomalies, predict incidents, and automate operational workflows - scaling reliability efforts across complex systems.


We are looking for engineers passionate about the above areas who are also interested in:

Providing technical leadership across multiple Azure teams. Mentoring others on SRE principles, practices, and tools as well as AI usage to boost software development productivity.
Designing and developing large-scale distributed software services and solutions. Delivering best-in-class engineering by ensuring services are modular, secure, reliable, testable, diagnosable, observable, and reusable.
Collaborating with internal and external partners to support team goals. Balancing pragmatism with visiondriving continuous improvements in process and codebase. Building automation to prevent or remediate service issues before they impact users.
Driving innovation in large-scale operations by applying cutting-edge AI tools and techniques to reduce operational toil and scale reliability engineering across complex systems. Gaining a working understanding of Microsoft businesses and contributing to cohesive, end-to-end user experiences.

Unity LevelPlay is a leading mediation platform that empowers app developers to optimize ad revenue by seamlessly connecting their apps to multiple ad networks.
At the core of LevelPlay, the LevelPlay Infra team is responsible for the mission-critical, real-time in-app bidding system, which serves billions of ad auction requests per day.

We are looking for an experienced and passionate Staff Backend Software Engineer

to join a rapidly growing team. In this role, you will lead the design and evolution of our large-scale, real-time infrastructure that powers global in-app advertising.

Youll tackle complex engineering challenges and drive the design of systems built for massive scale, reliability, and performance. As a hands-on technical leader, youll influence architecture and implementation decisions that define the future of LevelPlays infrastructure.

This is a great opportunity for experienced professionals who have a strong background in backend development and a deep understanding of large-scale distributed systems. If you're passionate about tackling complex technical challenges and building products that reach a massive global audience, this role is for you.

What you'll be doing
Lead the design and development of large-scale, low-latency, high-throughput systems that power real-time ad bidding and delivery.
Define and drive technical strategy and long-term architecture for LevelPlays core infrastructure.
Collaborate cross-functionally with product, data, and ad network integration teams to deliver impactful solutions that scale globally.
Mentor and guide engineers, fostering a culture of technical excellence, ownership, and continuous improvement.
Investigate and resolve complex system challenges, optimizing performance, reliability, and cost efficiency.

As a Principal Engineer of Mixed-Signal Design within the Chip Innovation and Infrastructure team, you will help deliver products that have a substantive impact on Googles technical infrastructure. You will provide technical leadership to a group of silicon engineers in an innovative and fast-paced environment with a focus on mixed-signal design for machine-learning accelerators within Google data centers. This role has a significant component of cross-collaboration with cross-functional organizations. You'll bring out the best in the team to deliver designs that serve many of Googles core businesses.

The ML, Systems, & Cloud AI (MSCA) organization at Google designs, implements, and manages the hardware, software, machine learning, and systems infrastructure for all Google services (Search, YouTube, etc.) and Google Cloud. Our end users are Googlers, Cloud customers and the billions of people who use Google services around the world.

We prioritize security, efficiency, and reliability across everything we do - from developing our latest TPUs to running a global network, while driving towards shaping the future of hyperscale computing. Our global impact spans software and hardware, including Google Clouds Vertex AI, the leading AI platform for bringing Gemini models to enterprise customers.

Responsibilities
Drive the mixed-signal design for CI2 in collaboration with other Google teams and external customers. Enable and maintain a strong co-design work process with all functions involved in designing and delivering mixed-signal components for CI2 products.
Ensure mixed-signal designs for CI2 chip architectures and fully enable and deliver Google product roadmap in terms of functionality, performance, power, cost, quality, usability, and deployability.
Set the direction for CI2 mixed-signal microarchitecture and modeling efforts and ensure on-time delivery of specifications to enable rapid and efficient development of next generation chips.
Collaborate with all functions of mixed-signal chip development (verification, implementation, etc.) and delivery (e.g., facilitate developers of various backgrounds to contribute to the mixed-signal architecture or encourage mixed-signal architects to be involved with chip development responsibilities).

Building Wixs 3000 microservices and 32M lines of code requires high-scale CI/CD. Bazel is our build tool of choice and we front its Scala integration and work on building additional sophisticated features, world-class pipelines, and highly scalable services to support them. We do hardcore backend engineering and specialize in Bazel, its tooling, and integrations.
We also work closely with the developers at Wix to improve their day-to-day experience and eliminate velocity killers, from their IDE to GA.

As an engineer in the Bazel team, youll:

Build and maintain tooling that helps our developers build and deliver code faster

Build, and maintain highly scalable backend services providing unique CI/CD experiences to support Wixs backend code.

Work as a part of the Bazel OSS community, participate in discussions and workgroups and help shape Bazel itself

Were looking for an experienced Principal or Senior Backend Engineer to join our Harmony SaaS Security team a high-performing group born from a successful cybersecurity startup acquisition. We operate with startup agility and innovation, backed by the global strength of a world-class security leader.

Why Join Us
High-Trust, High-Talent Team: Work with smart, humble engineers who value collaboration and excellence
Startup Energy, Global Impact: Innovate quickly within a global cybersecurity organization
Meaningful Ownership: Shape the architecture and technical direction of a platform redefining how enterprises secure SaaS and GenAI
AI-Accelerated Development: We embrace tools like Cursor, Claude, and ChatGPT - while maintaining strong coding standards
Our tech stack includes Go, Kubernetes, Kafka, GCP, Postgres, Redis, BigQuery, Terraform, Temporal, Prometheus, OpenTelemetry, and more - delivering scalable, reliable systems that protect modern SaaS and GenAI ecosystems.
Key Responsibilities
Lead the technical design and direction of core platform components.
Mentor and guide developers, promoting a culture of excellence and collaboration.
Drive critical architectural initiatives and ensure best practices across the stack.
Build and optimize scalable, secure backend systems supporting enterprise-scale SaaS security.
If you love leading from the front - solving complex problems, mentoring engineers, and building scalable security solutions - wed love to meet you.

Microsofts mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.

In alignment with our Microsoft values, we are committed to cultivating an inclusive work environment for all employees to positively impact our culture every day.
Responsibilities
Become a founding member of the AIAL group as part of Microsoft Red Team.

As a founding member, you will help shape the teams culture and practices.



Key responsibilities include:

Research and discover zero-day vulnerabilities in AI applications, models, and AI service ecosystems.

Work closely with Red Team operators and engineering teams to address findings and strengthen the resilience of AI-driven systems.

Analyze a wide array of data sources to identify potential security weaknesses and breach points within Microsofts AI infrastructure.

Develop tools and techniques to scale and accelerate adversary emulation and vulnerability discovery.

Advocate for security change across the company by building partnerships and clearly communicating the impact of risks.

As an AI Backend Engineer at SimilarWeb, you will be a key player in building our new AI platform, AI Studio. This platform aims to provide users with instant answers to complex market research questions, generate world-class reports, and create live, interactive, and powerful dashboards. Our goal is to reduce the complexity and time-to-insight for our users, helping them streamline their market tasks and achieve automation that drives real value.



Responsibilities:

Design and develop LLM-based intelligent agents that can handle complex market research queries.

Utilize LangGraph and other frameworks to create state of the art AI agents that integrate various tools and data sources.

Implement integrations that allow agents to take automated actions on behalf of users, streamlining workflows and reducing overhead.

Collaborate with product, data, and UX teams to ensure that AI solutions are aligned with user needs and business goals.

Continuously evaluate and improve the performance of AI models to ensure high-quality and data-driven results.

We are an agile team of technical engineers. Customer obsession is rooted deep in every decision we take. We move fast, allergic to over thinking and fail fast. We believe in building solutions the right way and with a do what it takes attitude. We are a team, a family, that will always succeed only as one team where all voices are heard, and all opinions are welcomed.
Responsibilities
This is a broad cross-team role with high visibility. You will collaborate closely with multiple teams across Microsoft to deliver key customer solutions and the technology to support them. Build features end to end - from our endpoint installed on the user machine across multiple platforms to Cloud Services.

Lead end to end design, implementation and delivery of the future architecture for highly scalable, durable, low latency systems.
Build an effective and agile development organization using industry leading best practices.
Lead the definition of requirements, KPIs, priorities and planning of engineering deliverables.
Proven team building experience as well as mentoring and growing team members.

The Online Stores group is responsible for an eCommerce platform with hundreds of thousands of online stores, processing billions of dollars in yearly GPV. The team is at the heart of this ecosystem, driving innovation and building the next generation of online commerce experiences. We work on a platform that influences millions of users and generates billions in revenue.

If youre passionate about backend engineering and want to work on projects that make a difference, wed love to hear from you!