We are looking for an experienced Full-Stack Engineer with strong backend expertise to join our growing Sales R&D team in Tel Aviv. This is a backend-leaning role focused on building and maintaining high-performance systems while contributing across full-stack services. As part of our team, youll drive the evolution of our Sales platform, take end-to-end ownership of impactful features, and contribute to an AI-first engineering culture that embraces automation, intelligent tooling, and continuous improvement. You will play a key role in improving product quality, engineering productivity, and system reliability as we support rapid business growth.
Responsibilities:
Design and deliver end-to-end features across backend services and frontend applications, with strong emphasis on backend architecture, data integrity, and system reliability.
Develop and maintain SPA web applications for admin and product platforms using React + TypeScript and Next.js, including contributing to the modernization of legacy Ruby components.
Develop and maintain backend services across Python (FastAPI) and Node.js (NestJS) microservices, ensuring strong performance, robust data management, and ongoing modernization efforts.
Design, implement, and maintain reliable REST APIs with clear contracts, validation, and consistent error handling.
Work with complex relational data models, continuously improving query performance and data reliability.
Lead investigations and root-cause analysis for performance, optimization, and production-related issues, driving long-term improvements.
Collaborate closely with frontend, backend, QA, and product teams in a multi-repo environment, including active code reviews and cross-site collaboration with our Boston engineering team.
Take ownership of code quality and production stability by writing automated tests (e.g., pytest, Jest) and driving issues from investigation through resolution and prevention.

We are an established team driving the innovation of our companys core audio-call infrastructure. Our current mission is the new development of high-performance services that power real-time audio streaming for external processing, recording services, and external API integrations.
Your key responsibilities:
In this role, you will focus on building new, scalable features from the ground up. While we value full-stack capability, your primary impact will be in Backend and Cloud Engineering using .NET and AWS (ECS/EKS).
You will take ownership of the end-to-end development of new audio-processing logic and the APIs that expose these capabilities to the rest of the organization.
This is a hybrid role, offering the flexibility to work most of the time remotely. However, certain tasks will require in-person collaboration with team members. You should be prepared to attend on-site meetings (Tel-Aviv) occasionally to support key project milestones and ensure successful outcomes.

We are seeking a talented Full Stack Engineer to join our team and help build the Opik product! Opik is an open-source platform designed to streamline the entire lifecycle of LLM applications, helping developers evaluate, test, monitor, and optimize their models and agentic systes.
Ready to shape the future of LLM development? Join us in building the next generation of AI observability tools!
Responsibilities:
Build & ship features at high pace in a fast-moving AI development environment
Develop and maintain comprehensive observability tools for LLM applications and RAG systems
Create intuitive user interfaces for LLM tracing, evaluation dashboards, and production monitoring
Build robust APIs and backend services to support real-time LLM application monitoring
Collaborate with AI researchers and ML engineers to implement cutting-edge evaluation methodologies
Contribute to both frontend (React/TypeScript) and backend (Java) components
Design and implement automated evaluation systems and "LLM as a Judge" capabilities
Work on integrations with popular LLM frameworks and libraries
Participate in open-source community engagement and technical documentation

We're seeking an experienced Full-Stack engineer proficient in both front and back-end programming, dedicated to leveraging technology for impactful product development. As a key member of the application team, your role involves designing and developing scalable front-end solutions, web architecture, and end-to-end platform services. Collaboration with product managers, UX/UI designers, and Geo-information analysts is essential to deliver robust features.



Responsibilities

Build top-notch, scalable, and reusable code, adhering to best practices in software engineering, architecture, and processes, including code reviews and testing.
Take complete ownership of new features, collaborating with PMs to define requirements, design scalable solutions, and iteratively enhance them based on user feedback.
Lead the development and maintenance of microservices, contributing to the evolution of our architecture for enhanced scalability and modularity.
Collaborate closely with cross-functional teams to define, design, and deliver high-quality software applications that align with both technical and business requirements.

About the role:
As our Full Stack Engineer at our company, you design and develop both back-end and front-end components to enhance our companys gifting platform. You are responsible for delivering high-quality features on time, building robust infrastructure, and implementing secure, scalable solutions across our cloud-based SaaS platform. Working with Tech Stack: React, OpenAPI, Node.js, TypeScript, Serverless, Kafka, you collaborate within a cross-functional team to solve technical challenges, deliver continuous value in smaller increments, and improve the user experience. You are expected to stay current with modern tools - including AI - and apply them thoughtfully to boost efficiency and impact.
You will
Partner with product managers, designers, and analysts to deeply understand the needs of our users and build a product that serves those needs
Take full ownership of engineering projects from design to implementation to deployment and maintenance
Design and build software used by thousands of customers
Write modular, secure, and well-tested code
Ensure that our development environment is best in class by delivering improvements to internal tooling and processes
Work closely with customer support to respond quickly to issues for our users and solve those in a permanent and scalable way
Improve the team and company - you will be an active participant in our culture.

As a team member in a growing startup, your impact on the company is unbound: our team not only implements the plan, but actually creates the plan, engages with customers and product management, defines testing and execution methodologies, according to each core team member's strong suites and preferences. We believe in distributed decision making, and we expect high investment in developer experience, test automation, and overall quality of architecture and code.

Responsibilities
Hands-on end-to-end development, including DevOps tasks and automated testing
Work in a cloud-native environment (Azure), microservices architecture, cutting-edge technologies, and a quality-first mindset
Deliver UI components and full screens - taking wireframes from design to full implementation
Design and improve our developer experience (DX), system architecture, and product infrastructure
Collaborate closely with the core team, participate in code reviews, interviews, and task prioritization
Take ownership and responsibility - your impact will grow as the company scales
Tackle scalability and performance challenges as we grow and our user base expands

We are seeking a highly skilled Angular Developer to join our team and contribute to critical initiatives at the core of our platform. The ideal candidate will demonstrate strong analytical and problem-solving capabilities, a proactive work ethic, and the ability to take full ownership of assignments from inception to completion.
This position requires the capacity to perform effectively in a dynamic environment, manage multiple projects simultaneously, and collaborate closely with cross-functional teams. Excellent communication skills, attention to detail, and the ability to prioritize tasks and meet deadlines are essential.

Design and implement complex frontend features for our content creation and management platform, ensuring scalability, performance, and maintainability.
Own features end-to-end - from technical design and architecture decisions through implementation, code review, testing, and production deployment.
Collaborate with product managers, designers, and backend engineers to translate requirements into technical solutions and deliver high-quality features.
Drive technical excellence by establishing coding standards, conducting thorough code reviews, and mentoring team members on best practices.
Monitor production systems using observability tools, proactively identify performance bottlenecks, and implement solutions to improve reliability and user experience.
Lead initiatives to reduce technical debt and modernize the codebase while maintaining backward compatibility and system stability.
Champion quality through comprehensive testing strategies including unit, integration, and e2e tests, ensuring high coverage and confidence in releases.

Your Role:

Lead the design and development of complex, high-performance, backend services within the 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, steering the team toward scalable, cloud-native best practices.

Actively mentor and contribute to code reviews and technical discussions, sharing expertise and fostering a collaborative environment for continuous improvement.

Collaborate closely with Product, SRE, QA and Security teams to implement technical solutions aligned with business objectives.

Take a production-first approach to reliability; lead root cause analysis for complex distributed system issues and implement preventative measures to guarantee system reliability.

XM Cyber is the leader in hybrid-cloud security posture management, using the attacker’s perspective to find and remediate critical attack paths across on-premises and multi-cloud networks. We are looking for a highly skilled independent Mid-Level Full-Stack Engineer to join our Infra Group. In this role, you will be part of the team responsible for the backbone of our R&D organization. You will take ownership of our internal systems and core services, ensuring they are scalable, performant, and provide an exceptional developer experience. Key Responsibilities ? End-to-End Feature Ownership: Design and implement complex features in our Back-Office, from database schema and backend APIs to polished, responsive frontend interfaces. ? Core Library Development: Build and maintain shared infrastructure. You will be creating the "bricks" that other developers use to build their services. ? Infrastructure as a Product: Treat our internal tools with the same care as customer-facing products, focusing on high-quality UI/UX and robust API documentation.

seeking an experienced Full Stack Engineer to help build and scale our SaaS security platform - with a growing focus on securing modern SaaS and AI-powered application ecosystems.At Valence, we protect organizations from threats created by SaaS and AI sprawl by unifying SaaS discovery, security posture, AI governance, and identity threat detection into a single platform. Youll work on cutting-edge cloud-native systems, helping to deliver solutions that uncover shadow AI apps, detect misconfigurations, and provide robust APIs and interfaces to empower security teams. ‍

Responsibilities
Hands-on end-to-end development of core features across the stack (backend, frontend, cloud services).
Work in a cloud-native environment (Azure) and microservices architecture, writing high-quality, maintainable code
Build robust APIs and UI components from design to full implementation
Improve developer experience (DX), test automation, system architecture, and infrastructure
Participate in peer code reviews, sprint planning, and technical discussions
Own technical challenges around scalability, performance, and secure data flows as the product and user base grow
Engage with emerging areas like AI usage patterns, anomaly detection, API protection, and identity security