Casium

Staff Founding Engineer [Full Stack]

AI Engineer

Casium is building the fastest, most comprehensive business immigration solution, combining human expertise and AI innovation to help companies secure top global talent. This Staff Founding Engineer role is a high-ownership position focused on core systems architecture, backend infrastructure, and product logic. You will work directly with founders, attorneys, and AI researchers to architect systems that power Casium, solving complex, high-stakes problems in immigration using software.

<h1 class="text-3xl md:text-4xl font-extrabold mt-6 mb-4 text-gray-900 tracking-tight">Our Mission</h1>Casium is building the fastest, most comprehensive business immigration solution. We bring together human expertise and AI innovation to help companies secure top global talent with speed, clarity, and compliance.Talent is global. But the immigration system wasn’t built for speed, clarity, or scale. Founders wait months to start companies. Engineers lose job offers to visa delays. HR teams drown in compliance paperwork. We’re rebuilding immigration from the ground up using AI, automation, and expert legal oversight - to make filing for a visa as seamless as signing an offer letter.<h1 class="text-3xl md:text-4xl font-extrabold mt-6 mb-4 text-gray-900 tracking-tight">Why it matters</h1>Immigration is not just paperwork - it’s access. Access to jobs, teams, opportunity. For companies, delays mean lost hires. For individuals, it can mean the end of a dream. We’ve already helped dozens of companies identify how to hire the top talent they want, retain key engineers, and unlock new markets—all while reducing legal spend by 30–50%. We are the bridge between great talent and the opportunities they deserve.<h1 class="text-3xl md:text-4xl font-extrabold mt-6 mb-4 text-gray-900 tracking-tight">Our customers</h1>We serve top-tier talent and teams, including startup founders from the AI2 Incubator, talent from Meta, Microsoft, and Amazon, and VC-backed companies hiring global operators. We’ve had zero customer churn to date and our customers consistently tell us Casium is the best immigration experience they’ve ever had. We’ve built a reputation for speed, transparency, and care and it shows in our word-of-mouth growth and extremely high approval record to date. We’re just getting started and the demand is already outpacing what we can build.<h1 class="text-3xl md:text-4xl font-extrabold mt-6 mb-4 text-gray-900 tracking-tight">Our investors</h1>We’re well funded and backed by world-class investors and operators across AI, SaaS, and global mobility who believe the future of innovation depends on global talent and that Casium will power it.If you want to build fast, own your work end-to-end, and make a real impact on real people’s lives, we’d love to talk. We’re hiring across engineering, legal ops, and growth. Reach out. We’ll show you what we’re building.<h1 class="text-3xl md:text-4xl font-extrabold mt-6 mb-4 text-gray-900 tracking-tight">About the Role</h1>We’re looking for a Founding Generalist Engineer to join Casium at the ground floor. This is a high-ownership role focused on core systems architecture, backend infrastructure, and product logic. We're solving one of the most complex and high-stakes problems in tech: helping extraordinary people navigate a broken immigration system using software, not spreadsheets.You’ll work directly with our founders, attorneys, and AI researchers to architect the systems that power Casium. If you’ve ever thought, “why does this still work like it’s 1998?” when working with an employer to file for a visa or dealing with legal software, we feel you, and we’re rebuilding it from first principles.This is a rare opportunity to build foundational tech for an industry that impacts millions of lives but has seen almost no real innovation.<h1 class="text-3xl md:text-4xl font-extrabold mt-6 mb-4 text-gray-900 tracking-tight">What You’ll Own</h1><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Architect and build our core backend systems: case pipeline logic, customer workflow infra, document storage and versioning, event systems, and compliance safeguards.</li><li class="leading-relaxed">Design a structured schema for immigration petitions, evidence generation, and multi-stakeholder collaboration (clients, lawyers, reviewers, employers).</li><li class="leading-relaxed">Build and scale AI-powered workflows for legal document preparation, expert review, and petition quality control.</li><li class="leading-relaxed">Interface deeply with LLMs, task queues, and decision engines to replace repetitive manual legal work with deterministic and probabilistic automation.</li><li class="leading-relaxed">Collaborate across legal, product, and engineering to turn messy policy and paperwork into clean abstractions that scale.</li><li class="leading-relaxed">Create internal platforms and developer tools to help our team ship high-quality code, faster, safely.</li></ul><h1 class="text-3xl md:text-4xl font-extrabold mt-6 mb-4 text-gray-900 tracking-tight">What We’re Looking For</h1><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">6–10+ years of professional software engineering experience with deep backend chops and a generalist mindset.</li><li class="leading-relaxed">Proven experience designing and scaling backend architectures in production (bonus if in regulated or high-trust domains like healthcare, finance, or legal).</li><li class="leading-relaxed">Comfort working with Python (FastAPI, Pydantic, SQLAlchemy), and Cloud environment such as AWS. We value pragmatism over stack purity.</li><li class="leading-relaxed">Experience building systems that combine human input + AI/ML outputs in reliable, testable ways.</li><li class="leading-relaxed">High agency and a strong product sense, you know when to slow down for correctness and when to ship scrappy.</li><li class="leading-relaxed">Thoughtful communicator. Clear written reasoning and clean architectural thinking matter more here than hot takes or whiteboard ping-pong.</li><li class="leading-relaxed">Startup experience or founder energy - you want to own outcomes, not just ship tickets.</li></ul><h1 class="text-3xl md:text-4xl font-extrabold mt-6 mb-4 text-gray-900 tracking-tight">Why Casium</h1><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">We’re building something that matters. Immigration is deeply broken - opaque, expensive, exclusionary. We help the people who build the future stay in the country legally, and we’re doing it with a full-stack, tech-forward approach.</li><li class="leading-relaxed">The market is huge and underserved. Business immigration is a massive market. We’ve already proven demand with real revenue and rapidly growing customer base.</li><li class="leading-relaxed">We’re early, but de-risked. Casium is backed by the AI2 Incubator, led by experienced operators, and well-funded by top-tier angels and VCs. You’ll get real equity with real upside.</li><li class="leading-relaxed">You’ll shape the company. As a founding engineer, your fingerprints will be on our culture, tech stack, and the company’s trajectory. This is not a backseat role.</li><li class="leading-relaxed">You’ll work on genuinely hard and novel problems - not yet-another CRUD app.</li><li class="leading-relaxed">You’ll join a team of builders. We are ex-Meta, Microsoft, and LegalPad, a founding team that cares deeply about output and impact.</li><li class="leading-relaxed">Access to unique learning opportunities. With the Allen Institute for AI (AI2) Incubator as a co-founder, our team gets access to numerous talks by leading AI researchers/paper authors, knowledge sharing amongst the community of hundreds of engineers working for AI2 companies, and much more. As a part of the multi-disciplinary team, you get to interact with people from very different backgrounds (from legal to AI to software engineers).</li></ul><h1 class="text-3xl md:text-4xl font-extrabold mt-6 mb-4 text-gray-900 tracking-tight">Why You Shouldn’t Join Us</h1><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">You need a PM to hand you specs. You won’t get one.</li><li class="leading-relaxed">You want predictable work and tight lanes. We’re still inventing the map.</li><li class="leading-relaxed">You don’t like talking to users or thinking in first principles.</li><li class="leading-relaxed">“Fast, high-quality, end-to-end shipping” sounds like a slogan, not a lifestyle.</li></ul>

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Acelab

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Join the AI revolution by contributing to our team's mission - helping businesses efficiently deploy AI at scale. You will be building distributed systems, designing reliable and adaptive solutions, and writing code that shapes the future of how AI is used.

Join the AI revolution by contributing to our team's mission - helping businesses efficiently deploy AI at scale. With us, you'll be building distributed systems, designing reliable and adaptive solutions, and writing code that shapes the future of how AI is used.<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Main Responsibilities:</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Design, develop and maintain highly scalable, resilient, and secure microservices built in Go.</li><li class="leading-relaxed">Design and implement metrics, logs, and tracing pipelines based on OpenTelemetry specifications and the product needs.</li><li class="leading-relaxed">Own our observability stack end to end, from design and implementation to scaling and optimization.</li><li class="leading-relaxed">Define and maintain observability best practices across engineering teams, from instrumentation and SLOs to dashboard design and alerting strategies.</li><li class="leading-relaxed">Create high-quality technical documentation and standards and help others to adopt new observability practices.</li><li class="leading-relaxed">Help teams and stakeholders navigate data and act on insights.</li><li class="leading-relaxed">Mentor and support other team members, share knowledge proactively.</li><li class="leading-relaxed">Respectfully taking ownership of architecture, design, development, and deployment initiatives.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Core Requirements:</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">5+ years of software engineering experience with senior-level proficiency in Go.</li><li class="leading-relaxed">Strong experience with some of the modern observability tools such as Prometheus, Grafana, LGTM Stack, ELK/OpenSearch, ClickHouse, Fluentbit, Vector, OTel Collector</li><li class="leading-relaxed">Solid understanding of metrics, logs, traces and how to turn these data to actionable insights.</li><li class="leading-relaxed">Hands-on experience running and monitoring workloads in Kubernetes clusters.</li><li class="leading-relaxed">Passion for building reliable, scalable systems and solving complex distributed systems problems.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Tools You Will Use:</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Go</li><li class="leading-relaxed">Kafka</li><li class="leading-relaxed">Redis</li><li class="leading-relaxed">Kubernetes</li><li class="leading-relaxed">Grafana,</li><li class="leading-relaxed">Mimir/Prometheus,</li><li class="leading-relaxed">ClickHouse</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Salary Range:</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Gross Salary 23800 - 33400 PLN/Month.</li></ul>What we offer• Professional growth. Internal and external events, online training, conferences, books - everything you need to reach full potential.• Health benefits. Private health insurance, sports access card, online workouts, consultations to feel and be your best.• Team spirit. Team buildings and parties with games, shows, tastings, food coupons, gifts, and it’s on us.• More free time. Stay with us and additional vacation days will be added to your calendar.• Additional paid leave. Additional days are covered by us in cases of illness or special occasions.• Flexibility. Flexible working time arrangement.We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

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Staff Founding Engineer [Full Stack]

AI Engineer

Job Details