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France
Remote only
Filigran, founded in October 2022, stands out in the cybertech ecosystem for its commitment to revolutionizing cyber threat management with a proactive approach. Its mission is to develop innovative open-source solutions designed to anticipate cyber threats, identify security gaps, and strengthen organizational security posture.
Filigran solutions are now trusted by over 6,000 public and private organizations worldwide.
We're looking for a Senior Software Engineer with deep expertise in distributed systems and platform engineering to join the XTM Foundation team — Filigran's cross-product engineering team responsible for architecture, quality, shared tooling, and technical standards across the XTM Suite (OpenCTI, OpenAEV, OpenGRC).
You will be the technical owner of our most ambitious infrastructure challenge: designing the architecture evolution to increase data processing capacity. You will define the patterns and standards that govern how our products communicate, scale, and evolve — working closely with product engineering teams to turn architectural vision into reality.
This is a high-impact, hands-on role. You won't just design on paper — you'll prototype, benchmark, validate, and help teams implement. You'll bring rigor and pragmatism to some of the hardest technical problems in our roadmap.
Lead the design and implementation of architecture evolution, targeting significant improvement in data processing throughput and scalability.
Identify and resolve bottlenecks across the current data pipeline (ElasticSearch, PostgreSQL, RabbitMQ, Redis) through rigorous profiling, benchmarking, and architectural analysis.
Evaluate and recommend infrastructure and messaging technologies, alternative graph databases, CQRS/event sourcing patterns, and validate them through hands-on prototyping.
Define and enforce cross-product standards for inter-service communication, data consistency, and system observability.
Build performance testing infrastructure from the ground up — establishing continuous performance monitoring as a first-class engineering practice across the XTM Suite.
Collaborate with product engineering teams (~60 engineers) to roll out architectural changes progressively and safely, with zero-downtime migrations where possible.
Contribute to the XTM Foundation team's broader mission: shared libraries, common patterns, and platform-level tooling that raise the bar for all product teams.
Stay current with the distributed systems and data engineering landscape, bringing well-evaluated proposals to the team.
Reports to: VP of Technology.
Key collaborators: Staff Engineers across OpenCTI, OpenAEV, and OpenGRC product teams; VP of Technology; CTO.
Working model: You will split your time between XTM Foundation team work (research, evaluation, prototyping) and embedded collaboration with product teams to implement and validate changes in real-world conditions.
8–12 years of experience building and operating distributed, high-throughput systems in production environments.
Proven track record designing architectures for data-intensive platforms (data pipelines, event-driven systems, graph databases, or equivalent).
Deep understanding of distributed systems fundamentals: consistency models, partitioning, replication, backpressure, fault tolerance, and observability.
Broad knowledge of backend languages and ecosystems — you've worked with multiple languages and paradigms, and you know how to pick the right tool for the job.
Deep familiarity with data storage and messaging technologies — you have hands-on experience with a range of databases (relational, search, graph, columnar) and message brokers, and you understand the trade-offs between them.
Ability to build performance benchmarks from scratch and translate results into clear architectural decisions.
Excellent system design and written communication skills — you can turn complex tradeoffs into actionable proposals that engineers and leadership can act on.
Comfortable working in a remote-first, async culture with teams across multiple time zones; clear communicator in English.
Autonomy and ownership mindset: you drive problems to resolution without waiting for direction, and you enable others rather than becoming a bottleneck.
XTM Foundation is Filigran's cross-product engineering team, created to raise the technical bar across the entire XTM Suite. The team owns the problems that no single product team can solve alone: shared architecture, inter-product communication standards, common UI components, CI/CD infrastructure, test quality, developer experience, and AI-assisted development practices.
XTM Foundation engineers work closely with all product teams — not as gatekeepers, but as force multipliers. They bring deep expertise, evaluate new approaches before rolling them out at scale, and help 60+ engineers build better software, faster.
We’re a fast-growing, global, and fully remote company building open-source cybersecurity solutions, increasingly powered by AI, to help defense teams anticipate threats and act faster.
⭐ What we believe
We believe we do work that matters, uniting defenders into a global community to make security more open, resilient & collaborative.
💻 How we work
We do work that matters by combining strong engineering standards with emerging technologies, including AI, to move faster and smarter.
🧭 What guides us
We make our work matter by building a culture grounded in our CORE values of Cohesion, Openness, Responsibility, and Equity. The principles that guide how we make decisions, treat people, and grow together, especially when no one’s watching.
Competitive pay + equity - everyone shares in our success
Remote-first, flexible, and balanced - work that fits your life
Your setup, your choice - pick the gear that works for you
Twice-a-year gatherings - we meet in person for regional and global offsites to connect, collaborate, and strengthen our culture beyond the screen
We enable cybersecurity through inclusion - from code to culture.
At Filigran, we are proud to be an equal opportunity employer. We believe diversity of our people make our products and our team stronger. We welcome talent of every background, identity, and lived experience, regardless of race, color, religion, gender, gender identity or expression, sexual orientation, national origin, age, disability, or veteran status.
What matters here is what you bring, not what you look like, where you’re from, or how you identify.
Apply now and help us build the future of the cybersecurity ecosystem, together.
