Fullstack Engineer en US/EU - Remote, España

Oneleet is one of the fastest-growing security and compliance platforms in history. We are on a mission to change the compliance and security industry by making cybersecurity and compliance effective, easy, and painless. We provide a platform that helps companies build, manage, and monitor their cybersecurity programs and achieve compliance standards such as SOC 2 and ISO 27001 efficiently, without cutting corners.

Having just raised a $33 million Series A, we are rapidly growing in customers and employees. Our team has decades of experience in security and compliance. Join our team of opinionated rebels and help us build a category-defining company reshaping the broken and fragmented compliance and cybersecurity industry.

Our mission is simple: make effective cybersecurity painless. We believe cybersecurity should empower, not burden. This belief unites our team and drives every decision we make.

If you're ready to challenge the status quo and help shape the future of cybersecurity, we'd love to meet you.

As a Fullstack Engineer at Oneleet, you'll work across our entire stack to ship features that make our cybersecurity platform fast, reliable, and genuinely useful for security teams. You'll own features end-to-end - from backend services and APIs through to the UI components that customers interact with day-to-day.

This is a hands-on engineering role at a Series A startup. You'll work closely with backend engineers, AppSec, design, and product to take features from mock-up to shipped product, and you'll engage directly with customers to iterate based on real-world usage.

Working primarily in Go, TypeScript, and React, you'll help us ship fast without sacrificing reliability or design quality.

• Build features end-to-end across backend (Go) and frontend (React/TypeScript)

• Design and implement APIs that power dashboards, workflows, and reporting

• Build UI components that present complex data clearly and drive user action

• Map complex backend data to clear, actionable interfaces

• Implement robust error handling and fallback behaviors for upstream service failures

• Optimize end-to-end performance, including caching, pagination, and query design for high-volume data

• Develop reusable patterns and components that scale across many areas of the platform

• Work directly with customers and design partners to understand how features are used and iterate rapidly

• Build monitoring and analytics to track feature usage, success rates, and user engagement

• Collaborate with AppSec, backend, and design on how data flows from services through to the UI

• 2-4 years of fullstack software development experience with expertise in Go and JavaScript/TypeScript

• Strong experience building production APIs (REST and/or gRPC) and integrating with third-party services

• Proven track record of building responsive, intuitive user interfaces with modern JavaScript frameworks (React preferred)

• Experience with data transformation and mapping between different system formats

• Strong understanding of asynchronous programming patterns and API optimization techniques

• Solid debugging skills across the full stack - from backend services to frontend UI

• Experience with production monitoring, logging, and observability tools

• Experience gathering requirements from users and translating feedback into technical improvements

• Strong communication skills and comfort working directly with customers

• Ability to balance technical excellence with shipping features that provide immediate value

• Background in cybersecurity or security tools

• Experience building data visualization components

• Experience with workflow engines and async job orchestration

• Comprehensive health & wellness benefits

• 20 days PTO per year, plus 8 floating holiday

• Remote work culture

• Team off-sites in stunning places (Amsterdam, Italy, etc).

• Competitive compensation & equity

We hire globally and compensate competitively within each market using geographic pay bands. The range for this role reflects a US national baseline. Offers for candidates in higher cost-of-labor markets (e.g., San Francisco, New York, Zurich) may fall at or above the top of the posted range, while offers in other markets are benchmarked to local standards and are lower. Within any range, individual compensation is determined by work location, skills and experience demonstrated through the interview process, and relevant education or training. This posting reflects base salary only and does not include equity or benefits.

Remote-First & Global Hiring

We're a remote-first company and hire globally in regions where we can legally engage talent directly or via our employer-of-record (EOR) partner. If you're based outside the U.S., we'll explore the most compliant hiring arrangement for your location. We make hiring decisions based on merit, skills, and potential regardless of location.

U.S. Hiring & E-Verify

For U.S.-based candidates, Oneleet participates in E-Verify to confirm employment eligibility, in accordance with federal regulations. We are an equal opportunity employer. We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other characteristic protected by applicable law.

How we use AI in this Hiring Process

This company uses automated technology, including AI-assisted tools, to assist in reviewing applications, assessing candidate qualifications, and detecting fraudulent submissions. These tools analyze application data and identity signals to support, but not replace, human hiring decisions. All final hiring decisions are made by a human reviewer. Candidates who require accommodation or who wish to request information about how these tools are used, including requesting the bias audit results, may contact [email protected]. This process is conducted in compliance with applicable federal, state, and local laws.

Notice for New York City Residents:

You have a right to take at least 10 business days to decide whether to proceed with submitting your information through this process. By continuing, you confirm your understanding of this notice. If you choose to proceed before the 10-business-day period expires, you are making a knowing and voluntary decision to do so.

At Oneleet, you'll join a tight-knit team of rebels redefining the cybersecurity industry. We move fast, own our work, and challenge outdated models to make security effortless and effective for companies.

Here's what makes us special:

• We value impact over titles, autonomy over micromanagement, and clarity over jargon.

• You'll tackle meaningful, hard problems with real-world consequences.

• You'll work with smart, kind, and ambitious teammates who lift each other up.

We value passionate self-starters with a growth mindset and a bias for action and personal accountability. If you love solving hard problems, thrive in ambiguity, and want to make a real impact, you'll fit right in.

We're especially drawn to:

• Rebels with a cause - frustrated with the status quo and eager to disrupt it.

• Opinionated (but not obstinate) builders - decisive yet collaborative, who help us move fast.

• Clear communicators - who own their ideas and follow through.