Senior/Staff Software Engineer - Search & Retrieval Infrastructure

Join Lendbuzz as a Senior Software Engineer with a focus on backend and infrastructure development. In this role, you'll be responsible for designing, implementing, and maintaining robust software systems that power our financial solutions. Collaborate with a talented team of engineers to enhance our platform's performance and scalability.The ideal candidate…

Join Singular, a premier marketing measurement platform utilized by over 1,000 renowned brands such as Rovio, Microsoft, Uber, DoorDash, Nike, EA, DraftKings, and Robinhood. For three consecutive years, Singular has been recognized as the #1 MMP by G2, empowering marketers to optimize user acquisition strategies and evaluate the efficiency of every advertising dollar through comprehensive marketing analytics, sophisticated cross-device attribution, and unparalleled ad fraud prevention. With the latest integrations with AI technologies like ChatGPT, Claude, and Gemini, we offer instant insights without the need for complex dashboards or SQL queries.With a global presence spanning 12 countries and employees across 65 cities, including major hubs like New York City, Los Angeles, and London, Singular has attracted $50M in funding from prestigious investors such as Norwest Venture Partners and General Catalyst.As we expand our innovative team and product offerings, we are on the lookout for dynamic, creative, and motivated individuals to join us in leading the marketing measurement industry.About The RoleWe are seeking a talented Infrastructure Backend Engineer to become a part of our R&D team in Tel Aviv, working in a flexible hybrid model.You will collaborate with a high-caliber R&D team and elevate your professional journey. Our backend infrastructure primarily utilizes Python and Go, but we encourage applications from skilled backend engineers proficient in any programming language.Example ProjectsDevelop Integrations with emerging Ad Networks, focusing on creating ingestion flows, authentication protocols, and data normalization.Enhance Real-Time Attribution by optimizing the pipeline to minimize latency and boost throughput through redesigning essential processing components.Implement Data-Quality Services to automatically identify anomalies, missing fields, and inconsistencies.Build a Comprehensive Monitoring Dashboard for partner integrations, integrating metrics, error rates, and SLA compliance.Strengthen System Resilience by incorporating retry logic, dead-letter queues, and idempotency for handling billions of daily events.

Product Analytics is designed to empower developers, product managers, and designers to gain insights into user behavior, make data-driven product decisions, and assess the repercussions of technical challenges on their customer base. As a Senior Software Engineer on the Product Analytics Backend team, you will be part of a dynamic, rapidly expanding product area. Your contributions will be vital in shaping our technical vision, guiding the product roadmap, and tackling intricate engineering challenges at scale.Within Product Analytics, we aggregate and process data from various sources, including clickstreams, user profiles, and external systems. Your role will be pivotal in constructing a sturdy and adaptable system that can effectively ingest, manipulate, correlate, and store this data, enabling efficient queries by our end users.At Datadog, we cherish our workplace culture—its ability to foster relationships, ignite creativity, and promote collaboration. We function as a hybrid workplace to offer our employees the flexibility needed to achieve a harmonious work-life balance.

HoneyBook builds an AI-powered platform for service-based entrepreneurs, helping independent professionals manage every stage of their business. From lead generation and client communication to project booking and payment processing, HoneyBook’s tools are designed to support growth and free up time for what matters most. Since 2013, the platform has handled more than 25 million client interactions and processed over $12 billion in transactions. The company’s culture centers on five values: collaboration, feedback, ownership, a growth mindset, and inclusivity. HoneyBook welcomes applicants from varied backgrounds who thrive in curious, evolving environments, even if every box isn’t checked. Team Focus: Financial Infrastructure This team develops and maintains the financial systems behind HoneyBook’s platform. Their work ensures every transaction, from checkout to payout, runs reliably, scales smoothly, and stays secure. The goal: safe, efficient financial interactions for every user. What You’ll Do Design and build backend systems that power HoneyBook’s financial transactions Create resilient, observable services to process funds securely and accurately at scale Work closely with engineering, product, member experience, and operations teams Contribute to the evolution of HoneyBook’s financial infrastructure and offerings Location This position is based in Tel Aviv.

About UsAt Redis, we are pioneers in building the technology that powers fast applications that are essential to everyday life. From checking the weather to processing online payments, our solutions serve over 10,000 customers worldwide. Join us in our mission to create a quicker, simpler digital world.We are currently seeking a talented Backend Software Engineer to enhance our R&D team based in Tel Aviv.Why You Will Love This RoleIn this exciting position, you will design and maintain our management platforms with a user base exceeding 200,000. You will take ownership of end-to-end development for key customer-facing features within our SaaS product.We are looking for a motivated individual with substantial experience in large-scale web applications, who is keen to learn new technologies and make a significant impact on our customers' experiences.Your ResponsibilitiesDevelop and enhance critical workflows within the Cloud Redis management platform.Refine existing code to ensure excellence and testability, driving continuous integration.Create new user-oriented features that enhance overall user experience.Collaborate effectively with team members across product, DevOps, support, customer success, and R&D teams both locally and internationally.Investigate and integrate new technologies and methodologies into Redis platforms.Lead features both within and outside the team from inception to delivery.Qualifications Needed6+ years of professional experience as a software engineer.Bachelor's degree in Computer Science, Software Engineering, or a related field.Proficiency in Java or C# programming languages.Experience in production deployment, debugging, and maintenance.Strong collaborative skills and a team-oriented mindset.Fluent in English, both written and spoken.Preferred QualificationsExperience with cloud platforms such as AWS or GCP and SaaS products.Familiarity with front-end technologies, particularly React.

Unlock your potential by becoming part of a leading, performance-driven advertising company! As a Senior Software Engineer within the Infrastructure Engineering R&D group, you will be instrumental in developing one of the world's largest real-time high-scale operations, supporting over 1.4 billion users, processing more than 500,000 requests per second, and managing 140TB of new data each day.

At Lendbuzz, we are committed to ensuring that financial opportunities are tailored and equitable. We create cutting-edge technologies that empower underserved and overlooked borrowers with enhanced access to credit solutions. Our company and culture are built on a strong belief in the power of diversity, valuing independent and critical thinking from our employees, dealers, partners, and borrowers.We are on the lookout for a skilled Full-Stack Engineer with a strong backend orientation to join our expanding Sales R&D team in Tel Aviv. This role emphasizes backend development while also contributing to full-stack service maintenance. You will spearhead the evolution of our Sales platform, taking full ownership of impactful features and driving an AI-first engineering culture that champions automation, intelligent tools, and continuous improvement. Your contributions will be vital in enhancing product quality, engineering productivity, and system reliability as we scale rapidly.

Why Join Nebius?Nebius is pioneering a transformative era in cloud computing to empower the global AI economy. We provide the essential tools and resources that enable our clients to address real-world problems and revolutionize industries without incurring substantial infrastructure expenses or the necessity of assembling extensive in-house AI/ML teams. Our workforce operates at the forefront of AI cloud infrastructure, collaborating with some of the most knowledgeable and innovative leaders and engineers in the sector.Our WorkplaceWith our headquarters in Amsterdam and listed on Nasdaq, Nebius boasts a worldwide presence with research and development hubs throughout Europe, North America, and Israel. Our team, comprising over 1400 employees, includes more than 400 highly skilled engineers with extensive expertise in both hardware and software engineering, complemented by an in-house AI research and development team.About the Tavily TeamThe Tavily team is developing the infrastructure layer for agentic web interactions on a large scale. Our API is architected to facilitate Retrieval-Augmented Generation (RAG) and real-time reasoning in AI systems. By linking large language models (LLMs) to reliable and high-quality web content, we empower developers to create agents that are not just intelligent but also informed.We collaborate with some of the most forward-thinking teams in the AI landscape, ranging from nimble startups to major enterprises implementing AI at scale. Whether enabling sales assistants, research copilots, or internal knowledge tools, we serve as the crucial bridge between LLMs and real-world applications.The Role: Senior Backend Engineer (Tavily)We are on the lookout for a talented Software Engineer to join our core engineering team, contributing to the infrastructure that underpins one of the fastest-growing AI APIs. You will engage with systems designed to manage massive scale within a distributed microservices architecture hosted on AWS. Expect to deliver quickly, take charge of vital systems, and tackle complex infrastructure challenges as we expand.This position is ideal for an engineer passionate about building ambitious systems from the ground up and eager to confront the scale and complexity challenges typically associated with much larger organizations.

Join Our Team as a Senior Infra Backend EngineerCompany OverviewSingular is at the forefront of marketing measurement, serving over 1,000 esteemed global brands such as Apple, Microsoft, Uber, DoorDash, Nike, EA, DraftKings, and Robinhood. For three consecutive years, we've been recognized as the top Marketing Measurement Platform (MMP) by G2. Our platform empowers marketers to optimize user acquisition strategies and evaluate the effectiveness of every advertising dollar through comprehensive marketing analytics, sophisticated cross-device attribution across mobile, web, and console platforms, and elite ad fraud prevention measures. Moreover, our innovative partnerships with AI technologies like ChatGPT, Claude, and Gemini are transforming campaign analysis, providing instant, intelligent marketing insights without the need for complex dashboards or SQL queries.With teams spanning 12 countries and a workforce in 65 cities worldwide, including major hubs like NYC, LA, SF, Austin, Buenos Aires, São Paulo, London, Berlin, Barcelona, Tel Aviv, Bangalore, Beijing, and Seoul, Singular is backed by $50 million from prominent investors such as Norwest Venture Partners, General Catalyst, and Titanium Ventures.As we experience rapid growth, we are eager to welcome ambitious, creative, and innovative individuals to help us excel in the marketing measurement industry.About The RoleWe are looking for a passionate Senior Infra Backend Engineer to enhance our R&D team in Tel Aviv. This role offers a hybrid and flexible working model, allowing you to collaborate with a high-caliber R&D team and advance your professional journey. Our backend infrastructure primarily utilizes Python and Go, but we encourage talented backend engineers from diverse programming backgrounds to apply.Example ProjectsResearching and executing POCs (Proofs of Concept) for new technologies to determine the best fit for system requirements.Efficiently migrating vast amounts of user-level data into Iceberg, focusing on scalability and cost-effectiveness.Designing and implementing a robust data pipeline capable of processing billions of real-time events daily, handling hundreds of thousands of events per second.Evaluating and selecting database and streaming technologies to accommodate our rapidly expanding client base.Leading the design and development of an advanced streaming ETL product optimized for low memory usage and efficient processing.Key ResponsibilitiesCollaborate with cross-functional teams to develop backend solutions that drive business goals.Ensure the reliability and scalability of backend systems.Participate in code reviews and contribute to team knowledge sharing.

At Semperis, we are committed to being a Force for Good, starting with creating a fantastic workplace. We recognize that when individuals feel appreciated, supported, and empowered, they achieve their highest potential. Therefore, we are dedicated to fostering an employee experience that emphasizes purpose, growth, and work-life balance. Semperis has earned accolades as one of America’s Fastest-Growing Cybersecurity Companies by the Inc. 5000, a DUNS 100 Top Startup to Work For, and has received multiple Inc. Best Workplace awards.About the RoleWe are on the lookout for a talented Senior Backend Engineer to join our Platform Group. In this pivotal role, you will design and develop shared infrastructure components that drive Semperis's enterprise security and identity solutions. This position necessitates a combination of technical expertise and robust collaboration skills across teams.Your ResponsibilitiesAs a Senior Backend Engineer on our Core Platform team, you will:Design and develop shared platform components that are scalable, reliable, and maintainable for multiple product teams.Architect distributed systems utilizing microservices and event-driven patterns to accommodate enterprise-level workloads.Take ownership of critical backend services from initial concept to deployment, ensuring code quality, performance, and operational excellence.Engage in extensive collaboration with product engineers, DevOps, and architects to define platform capabilities and technical standards.Mentor junior engineers through code reviews, pair programming sessions, and providing technical guidance.Lead technical initiatives aimed at enhancing developer productivity, system observability, and platform resilience.Contribute to architectural decisions and establish best practices for backend development organization-wide.Analyze system performance and data patterns to uncover optimization opportunities and guide future platform investments.QualificationsRequired Skills7+ years of professional software engineering experience, with significant expertise in backend development.Extensive knowledge of C# and .NET Core, including familiarity with modern framework features and performance optimization techniques.Proficient in designing and implementing microservices architectures and event-driven systems.Strong problem-solving skills with a focus on delivering high-quality solutions.Excellent communication and teamwork abilities to collaborate effectively with various stakeholders.

About the Role We are seeking a dynamic Senior Backend Software Engineer to play a pivotal role in shaping our GenAI Platform. In this influential position, you will lead the design and implementation of scalable GenAI systems, ensuring seamless connectivity with various platforms and tools. You will define and establish best practices in AI development, mentor fellow engineers, and shape the company's AI strategy, all while remaining deeply engaged in hands-on development.This role is all about ownership and creating a meaningful impact: from building and leading to shaping transformative outcomes end-to-end.

Be a key player at Via, where we are revolutionizing transportation across the globe. Our mission is to make cities smarter, greener, and more connected as we tackle the challenges of modern commuting and environmental sustainability. Join us in our bold vision and contribute your exceptional skills to make a significant impact.As a Senior Backend Engineer in our Tel Aviv R&D team, you will be instrumental in designing, building, and scaling advanced backend systems that facilitate our global operations. You will thrive in a dynamic culture that fosters innovation, collaboration, and agility, where your contributions will enhance the lives of countless individuals and reshape community mobility.

Unlock your potential by becoming part of a leading performance-oriented advertising company!In the role of Senior Backend Engineer, you will play a pivotal role in the development and optimization of our fundamental infrastructure that manages Real-Time Bidding (RTB) requests on a large scale, which is one of the company's primary revenue-generating operations.To excel in this position, you should possess:Over 5 years of programming experience in Java or a similar Object-Oriented language (preferably Java 8+ with Spring)A solid understanding of production systems and web product architectureA proactive approach to tackling unknown challengesA genuine passion for problem-solving and close collaboration with business unitsExperience with both SQL and NoSQL databasesA Bachelor’s degree in Computer Science or a related fieldA strong willingness to work intensively to achieve rapid results in unfamiliar areasA product-oriented mindsetA pragmatic approach to decision-making, avoiding analysis paralysisStrong analytical capabilitiesBonus points if you bring:Experience in developing large-scale distributed systemsFamiliarity with Kafka, Docker, and KubernetesA deep understanding of web systems (API / REST / NGINX)Experience with various SQL and NoSQL databases (such as MySQL, Vertica, Cassandra)Proficiency in Big Data tools (like BQ, Zeppelin, etc.)Knowledge of algorithms, data mining, and machine learningYour Contribution:As a Senior Backend Engineer, your contributions will include:Building one of the largest real-time big data operations globally, processing over 40TB of new data dailyOwning the entire lifecycle of our frontend and backend services — from design to deployment and maintenanceCollaborating with a team of exceptional software engineersImpacting how billions of people discover content onlineDeveloping solutions at an unprecedented scale, handling hundreds of thousands of requests per secondEngaging in innovative projects that will drive future growth at TaboolaRecent Achievements by our Software Developers:Creating a unique data pipeline for managing RTB requests at scaleDesigning an algorithmic model to predict the value of Real-Time impressions for Taboola

JOIN OUR TEAM AT UNITUnit is at the forefront of embedded finance, delivering innovative financial services that are ready for launch, including banking and capital solutions. We proudly support millions of users through approximately 100 valued partners, such as Wix, Honeybook, and Relay.As seasoned founders with deep technical expertise, we’re dedicated to building a thriving company that we take pride in. Our platform facilitates over $40 billion in transactions annually and handles more than 12 million API calls each day. Backed by over $160 million in funding from top-tier investors like Insight, Accel, and more than 60 angel investors, we are poised for significant growth.Your RoleIn this pivotal position, you will play a crucial role in defining the future of our product and company. You will oversee the development of Unit features from conception to deployment, tackle complex challenges, and collaborate with diverse teams to drive innovation.This is a unique opportunity for the right candidate to contribute to the establishment of an industry-leading company from the ground up.Key ResponsibilitiesDevelop and implement scalable backend services that meet the demands of Unit’s expansive ecosystem.Take ownership of Unit features, managing the entire lifecycle from design through implementation and testing to deployment.Address a variety of complex challenges within a distributed microservices architecture.Collaborate with cross-functional teams to deliver groundbreaking features in Banking, Payments, Cards, and Lending.Create developer-oriented solutions with a strong focus on performance and quality.What We’re Seeking5+ years of experience in backend development within a microservices architecture.Proven track record in building, deploying, and maintaining scalable, testable systems in a cloud environment.Strong understanding of critical production system concepts such as high availability, reliability, and scalability.Familiarity with cloud platforms (e.g., AWS, GCP, Azure).Experience with Continuous Integration and Continuous Deployment (CI/CD).Hands-on experience with Kubernetes is a plus.Knowledge of Scala is an advantage.A passion for Software and Functional Programming is a plus.Experience with ZIO / Cats / Scalaz is an advantage.

Who is Tenable?Tenable® is a leader in Exposure Management, empowering over 44,000 organizations worldwide to comprehend and mitigate cyber risks. Our talented workforce supports 65% of the Fortune 500, 45% of the Global 2000, and numerous large government bodies. Join us on our innovative journey!What makes Tenable an excellent workplace?Our team members will tell you it's the people! We collaborate to build cutting-edge cybersecurity solutions for our clients while fostering an inclusive culture of respect and excellence. As part of our #OneTenable team, you will work alongside some of the industry's most skilled and passionate individuals, supported by the resources you need to make a meaningful impact. Together, we achieve results that surpass expectations!Your Role:Lead the design and development of complex, high-performance backend services within the Tenable One ecosystem, ensuring modularity and long-term maintainability.Own the end-to-end performance of critical platform components, optimizing for massive data ingestion and low-latency processing across global environments.Drive architectural discussions and provide high-level input on system design, guiding the team towards scalable, cloud-native best practices.Mentor colleagues and actively participate in code reviews and technical discussions, sharing expertise and promoting a collaborative environment for continuous growth.Work closely with Product, SRE, QA, and Security teams to implement technical solutions that align with business goals.Adopt a “production-first” mindset regarding reliability; lead root cause analyses for complex distributed system issues and implement preventive measures to ensure system stability.

At Semperis, we strive to be a Force for Good by fostering an exceptional workplace environment. We understand that when employees feel valued and supported, they excel in their roles. Our focus is on creating a work experience that emphasizes purpose, growth, and work-life balance. Semperis has earned accolades as one of America’s Fastest-Growing Cybersecurity Companies by Inc. 5000, recognized as a DUNS 100 Top Startup to Work For, and honored multiple times as an Inc. Best Workplace.About the RoleWe are looking for a talented Backend Engineer to become a vital part of our Platform Group. You will be instrumental in designing and developing shared infrastructure components that are integral to Semperis's enterprise security and identity solutions. This role demands both technical prowess and the ability to partner effectively across teams.What You'll DoAs a Backend Engineer on our Core Platform team, your responsibilities will include:Designing and implementing shared platform components for multiple product teams, ensuring they are scalable, reliable, and maintainable.Architecting distributed systems using microservices and event-driven architectures to handle enterprise-scale workloads.Owning key backend services from initial conception to deployment, focusing on code quality, performance improvements, and operational excellence.Collaborating closely with product engineers, DevOps, and architects to define platform capabilities and technical standards.Leading technical initiatives that enhance developer productivity, system observability, and platform resilience.Contributing to architectural decisions and establishing best practices for backend development within the organization.Analyzing system performance and data patterns to identify optimization opportunities and guide future platform investments.What You BringRequired Qualifications5+ years of professional software engineering experience, particularly in backend development.Strong proficiency in C# and .NET Core, with a solid understanding of modern framework features and performance optimization techniques.Production experience with Kubernetes and container orchestration within cloud environments (preferably Azure, AWS, or GCP).

About BrandlightBrandlight is at the forefront of redefining enterprise AI visibility. Our platform empowers premier brands to effectively understand, manage, and enhance their presence in the evolving landscape of AI-driven search, commerce, and advertising.As the AI sector rapidly matures into a multi-trillion-dollar marketing avenue, Brandlight is pioneering the frameworks that determine how brands are discovered, trusted, and chosen by consumers.Become a part of our innovative team and contribute to developing next-generation tools that are set to transform brand management in an AI-centric world.About the RoleAs a Senior Backend Engineer at Brandlight, you will play a pivotal role in shaping our backend infrastructure. You will take charge of designing and implementing systems capable of managing billions of data points daily while ensuring high reliability and real-time visibility.This position is ideal for an individual who thrives in complex environments, can swiftly develop solutions from the ground up, and possesses a strong focus on automation to create scalable production-grade infrastructure.ResponsibilitiesDevelop and manage backend infrastructure handling billions of data points daily.Design services that are scalable, reliable, automated, and observable.Implement daily monitoring systems that uphold stringent SLAs.Create parallel execution systems to optimize processing and reporting times.Provide real-time monitoring and alerts for system and data health.Minimize manual efforts through automation and improved tooling.Oversee the delivery process end-to-end from architecture to production and performance.RequirementsMinimum of 7 years of experience in building scalable production systems.7+ years of proficiency in Python, with a focus on writing clean and maintainable backend code.Proven track record of building infrastructure from scratch and managing it end-to-end.Experience in independently launching backend products from design to production.Familiarity with high-throughput data collection and monitoring systems.An automation-first mindset that focuses on reducing manual work through effective tools and processes.Excellent communication skills and the ability to drive execution across teams.A curious, low-ego autodidact with demonstrated leadership capabilities.Why Join Us?At Brandlight, you will not just be part of a team; you will be a key player in shaping a new category in the industry. Your contributions will have a lasting impact on the future of brand management in an AI-driven marketplace.

Join Speechify as a Software Engineer specializing in Data Infrastructure and Acquisition. In this pivotal role, you will develop and maintain scalable data solutions that empower our applications and improve user experience. You will collaborate with cross-functional teams to design efficient data pipelines and leverage innovative technologies to enhance our data operations.

Join our dynamic Platform Infrastructure team as a Senior Software Engineer, where you will be instrumental in designing and building the core Axonius Platform that underpins all current and future offerings. You will confront challenging engineering challenges across the entire stack, from low-level system configurations to advanced distributed backend applications. By joining our diverse global team, you'll serve as a technical beacon, conducting in-depth research and troubleshooting complex performance and architectural challenges that others find elusive.