Principal Software Development Engineer (GoLang, Java, or Rust)

Zscaler

About Zscaler Zscaler accelerates digital transformation to ensure our customers can be more agile, efficient, resilient, and secure. As an AI-forward enterprise, we are constantly pushing the envelope, leveraging the world’s largest security data lake to power our cloud-native Zero Trust Exchange platform. This innovation protects our customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Here, impact in your role matters more than title and trust is built on results. We say, impact over activity. We seek innovators who actively use AI to amplify their impact and who thrive in an environment where we leverage intelligent systems to stay ahead of evolving threats. We believe in transparency and value constructive, honest debate—we’re focused on getting to the best ideas, faster. We build high-performing teams that can make an impact quickly and with high quality. To do this, we are building a culture of execution centered on customer obsession, collaboration, ownership, and accountability. We value high-impact, high-accountability with a sense of urgency where you’re enabled to do your best work and embrace your potential. If you’re driven by purpose, thrive on solving complex challenges, and want to be part of the team that’s helping to secure the AI age, we invite you to bring your talents to Zscaler and help shape the future of cybersecurity.       Role We are looking for a visionary Principal Software Development Engineer to join our Frontend Engineering team and lead the design, development, and evolution of world-class web applications. Reporting to the Manager of Software Development Engineering, you will play a pivotal role in shaping Zscaler’s next-generation user interfaces. This is a high-impact leadership role where you will balance hands-on architecture with strategic technical direction, mentoring and guiding other engineers to elevate our overall engineering excellence. What You'll Do (Key Responsibilities) * Architect & Deliver: Design and build high-quality ReactJS solutions, specializing in translating complex UI/UX designs into robust, production-ready applications while providing technical mentorship to foster a culture of innovation * Drive Engineering Excellence: Shape and evolve Zscaler’s core design system. Champion frontend best practices, including modularity, semantic code, comprehensive automated testing, and deep performance tuning * Cross-Functional Integration: Define clean API contracts and seamless integration roadmaps in collaboration with backend teams. Partner with DevOps to optimize CI/CD pipelines and continuously evaluate emerging technologies * Scale & Refactor: Lead systematic refactoring efforts to ensure long-term scalability, reliability, and maintainability. Drive engineering excellence with a strong focus on accessibility (a11y) and research-driven methodologies Who You Are (Success Profile) * You Think at Scale: You connect your day-to-day work to the larger company mission and think globally. You build solutions, processes, and architectures that are not just effective today, but are built to last and support a high-growth organization * You are Driven by Innovation: You possess a deep curiosity for how things work and are energized by solving complex technical hurdles. You believe in the power of technology to accelerate transformation and consistently hunt for more secure, scalable methods * You are a Problem-Solver: You actively seek out engineering challenges because you are energized by finding solutions, knowing that solving the hardest problems delivers the biggest business and customer impact * You are Data-Driven: You lean on data and analytics to uncover engineering truths, measure what matters, and guide informed architectural decisions—replacing "I think" with "I know." * You are a Learner: You have a true growth mindset and never stop developing your technical or leadership skills. You actively seek and implement feedback to become an exceptional collaborator and teammate What We're Looking For (Minimum Qualifications) * Experience: 8+ years of professional software development experience, with 5+ years specializing in large-scale, production-grade ReactJS and Redux applications * Technical Mastery: Expert-level proficiency in ReactJS development using TypeScript, ES6+, and advanced state management paradigms * Data Visualizations: Proven experience building highly complex UIs, data-heavy dashboards, and advanced data visualizations (e.g., D3.js) * Testing Excellence: Deep expertise in developing extensive unit, integration, and E2E testing suites using frameworks such as Jest, Enzyme, or Cypress * Enterprise Architecture: Proven track record of designing and deploying large-scale enterprise UIs emphasizing high availability, performance, and a seamless global user experience * AI Tool Integration: Demonstrated curiosity and active exploration of AI tools, with a history of integrating modern technologies to enhance daily workflows and augment problem-solving capabilities What Will Make You Stand Out (Preferred Qualifications) * Advanced experience driving performance optimization (speed, responsiveness) using cutting-edge techniques such as lazy loading, code splitting, and tree shaking to enhance application scalability * Strong familiarity with backend development principles and practical experience using Node.js (or similar) for API integration, tooling, and debugging * Ability to architect and implement scalable, modular solutions tailored for multi-tenant enterprise applications, ensuring future-proofed system development #LI-SK3  #LI-HYBRID At Zscaler, we are committed to building a team that reflects the communities we serve and the customers we work with. We foster an inclusive environment that values all backgrounds and perspectives, emphasizing collaboration and belonging. Join us in our mission to make doing business seamless and secure. Our Benefits program is one of the most important ways we support our employees. Zscaler proudly offers comprehensive and inclusive benefits to meet the diverse needs of our employees and their families throughout their life stages, including: * Various health plans * Time off plans for vacation and sick time * Parental leave options * Retirement options * Education reimbursement * In-office perks, and more! Learn more about Zscaler's hybrid working model and benefits here. By applying for this role, you adhere to applicable laws, regulations, and Zscaler policies, including those related to security and privacy standards and guidelines. Zscaler is committed to providing equal employment opportunities to all individuals. We strive to create a workplace where employees are treated with respect and have the chance to succeed. All qualified applicants will be considered for employment without regard to race, color, religion, sex (including pregnancy or related medical conditions), age, national origin, sexual orientation, gender identity or expression, genetic information, disability status, protected veteran status, or any other characteristic protected by federal, state, or local laws. See more information by clicking on the Know Your Rights: Workplace Discrimination is Illegal link. Pay Transparency Zscaler complies with all applicable federal, state, and local pay transparency rules. Zscaler is committed to providing reasonable support (called accommodations or adjustments) in our recruiting processes for candidates who are differently abled, have long term conditions, mental health conditions or sincerely held religious beliefs, or who are neurodivergent or require pregnancy-related support.

Lovable

TL;DR: We're seeking exceptional senior engineers and technical leaders for our Product team to help build the future of AI software creation. You will work across our entire stack to build features that will empower the next generation of creators and builders. Why Lovable? Lovable lets anyone and everyone build software with any language. From solopreneurs to Fortune 100 teams, millions of people use Lovable to transform raw ideas into real products - fast. We are at the forefront of a foundational shift in software creation, which means you have an unprecedented opportunity to change the way the digital world works. Lovable-built applications and websites are visited hundreds of millions of times a month, and our enterprise footprint is compounding fast. And we’re just getting started. We’re a small, talent-dense team building a generation-defining company from Stockholm. We value extreme ownership, high velocity, and low-ego collaboration. We seek out people who care deeply, ship fast, and are eager to make a dent in the world. What we’re looking for * 10+ years of experience designing, building, and shipping production products, with a track record operating at senior engineering levels. * Deep experience across the full stack, or strong backend depth - fluent in modern frontend (React/TypeScript) and/or backend (Golang, Rust) development. * Solid understanding of systems design, performance tradeoffs, and scalable architecture for products serving millions of users. * Strong product sense and the ability to make well-reasoned technical decisions - knowing when to prioritise speed and when to invest in foundational work. * You own systems end-to-end: architecture, implementation, deployment, monitoring, and iteration. * You're comfortable navigating ambiguity and driving clarity at an organisational level, not just technically. What you’ll do In one sentence: Do all it takes to build a generational product - scaling the core Lovable experience for millions of users worldwide. * Build and scale the systems that power Lovable products, ensuring they're fast, reliable, and ready to support millions of users. * Implement and maintain features across the stack - frontend, backend, and infrastructure - owning them from architecture through to production. * Design, implement, and maintain backend services, APIs, and infrastructure components built for scale. * Collaborate closely with ML, design, and product teams to translate capabilities into intuitive, mind-blowing user experiences. * Drive the full development lifecycle, from technical planning to production launch and post-release iteration. * Contribute to shaping our technical direction, engineering culture, and product strategy. Our tech stack We're building with tools that both humans and AI love: * Frontend: React * Backend: Golang and Rust * Cloud: Cloudflare, GCP, AWS, Many LLM providers * DevOps & Tooling: Github Actions, Grafana, OTEL, , infra-as-code (Terraform) And always on the lookout for what's next! About your application Please submit your application in English. It’s our company language, so you’ll be speaking lots of it if you join. We treat all candidates equally - if you’re interested, please apply through our careers portal.

Lovable

TL;DR: We're seeking exceptional senior engineers and technical leaders for our Platform team, who own the infrastructure that powers Lovable's AI product and the developer experience that lets our engineering teams move at maximum velocity. Why Lovable? Lovable lets anyone and everyone build software with any language. From solopreneurs to Fortune 100 teams, millions of people use Lovable to transform raw ideas into real products - fast. We are at the forefront of a foundational shift in software creation, which means you have an unprecedented opportunity to change the way the digital world works. Lovable-built applications and websites are visited hundreds of millions of times a month, and our enterprise footprint is compounding fast. And we’re just getting started. We’re a small, talent-dense team building a generation-defining company from Stockholm. We value extreme ownership, high velocity, and low-ego collaboration. We seek out people who care deeply, ship fast, and are eager to make a dent in the world. What we’re looking for * 10+ years in platform, infrastructure, or developer experience engineering, with a track record operating at senior engineering levels. * Deep experience building and operating in one or more of: production infrastructure, platform engineering, or developer experience (observability, CI/CD, application frameworks, productivity tooling). * Strong proficiency in at least one systems-oriented language (Go, Rust, C++, or similar), with a track record of designing high-throughput services at scale — and/or experience writing code and tools to support growing engineering orgs in scale-ups. * Solid working knowledge of Docker, Kubernetes, and modern infrastructure practices; ideally with understanding that goes deeper than configuration — how schedulers, runtimes, and isolation boundaries actually work * You ship high-leverage systems fast and know when to make trade-offs between security, stability, and speed. * You're comfortable navigating ambiguity and driving clarity at an organisational level, not just technically. * You're based in Stockholm or ready to relocate — this is an on-site, 5-days-a-week role. What you’ll do In one sentence: We build and own the systems and developer platform that make AI engineering work and keep our engineering teams the most productive in the world. * Design, build and maintain the core systems that enable our AI product, including a gVisor-based runtime for agentic workloads and a high-throughput sandbox scheduler across multiple cloud providers. * Bring order and structure to our codebase; integrate or build application frameworks to support a growing engineering organisation. * Own and develop our observability stack, from code instrumentation through ingestion to presentation. * Harden our infrastructure against failures, downtime, and slowdowns — ensuring it never becomes a bottleneck to growth. * Plan and implement our network infrastructure and cloud strategy. * Integrate tools for AI-driven development across the engineering org. * Identify and drive reliability improvement efforts across all engineering teams. Our tech stack We're building with tools that both humans and AI love. Lovable platform engineers are capable of working across the whole stack. Examples of tech in our stack include: * Frontend: React and Typescript. * Backend: Golang and Rust. * Cloud: Cloudflare, GCP, AWS. * Data: Clickhouse, Firestore, Spanner, BigQuery. * DevOps Tooling: CI/CD pipelines, OTEL, Grafana, kubernetes, terraform. * Local Tooling: Nix, DevEnv. And always on the lookout for what's next! About your application Please submit your application in English. It’s our company language, so you’ll be speaking lots of it if you join. We treat all candidates equally - if you’re interested, please apply through our careers portal.