Overview
Senior Product Engineer Jobs in South Africa at Castle
Direct message the job poster from Castle
Castle is a Series A startup on a mission to create a safer online world by protecting platforms from fraud, abuse, and malicious activity. Trusted by companies like Canva, Atlassian, and Rockstar Games, we’re backed by Y Combinator, Index Ventures, and top-tier angels from Datadog, Stripe, and New Relic. Our fast-moving team is scaling globally, helping platforms stay secure while thriving in a rapidly evolving digital landscape.
Every month, our systems process billions of API requests with strict latency requirements to enable real-time decision-making for our customers. In addition to solving cutting-edge scalability challenges, we strongly emphasize crafting exceptional user experiences and design.
This is a fully remote role, with teammates in the US, Poland, Portugal, Sweden, and France. We have a local presence in New York and Cracow if you prefer to come into the office. We expect candidates to be located in time zones between UTC-5 (New York) and UTC+1 (Cracow) to ensure smooth collaboration.
Responsibilities:
You’ll be working on our core platform and product, built on a modern stack including AWS Cloud, Ruby on Rails 7, and Angular 18.
You’ll collaborate closely with other team members, brainstorming ideas, providing constructive feedback, and reviewing their work to ensure high-quality outcomes.
You’ll ship incrementally and frequently, driving a constant flow of iterative, customer- and internal-feedback-driven development.
As part of a small team, you’ll have a significant impact on the direction and implementation of our projects, shaping the future of our product.
Qualifications:
6+ years of professional software development experience, ideally in a SaaS and/or startup environment.
Experience building large-scale, performance-optimized production applications, preferably in Ruby, but proficiency in other similar languages, such as Node.js should enable a relatively straightforward transition.
Experience shipping a public-facing API is highly valuable. You should be passionate about developer ergonomics, API design, and making our product as seamless and enjoyable to integrate with as possible.
Strong verbal and written English communication skills to effectively collaborate with a distributed team and engage with customers when needed.
At Castle, we foster a culture of innovation, collaboration, and ownership. If you enjoy working in a fast-paced, startup environment where you can make a real impact, you’ll thrive here.
We believe in empowering individuals to take full ownership of their work, driving projects from concept to completion with autonomy and accountability.
We value curiosity, adaptability, and a growth mindset. Whether you’re experimenting with new ideas or iterating on existing solutions, we encourage open communication and constructive feedback.
As a small team, we prioritize optimizing people’s efficiency and welcome the use of automation and AI-powered tools to enhance productivity.
Offer:
We pay US salaries globally.
Flexible work hours. We prioritize outcomes over hours spent.
Unlimited PTO. Take the time you need to recharge and maintain a healthy work-life balance.
Paid parental leave. Supporting new parents during their transition.
We’ll supply the computer and related gear you need to excel.
Seniority level
Mid-Senior level
Employment type
Contract
Job function
Software Development
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Title: Senior Product Engineer
Company: Castle
Location: South Africa
Category: Software Development (Software Engineer, Full Stack Developer, Cloud Engineer – Software, Backend Developer)
