[Hiring] Senior Fullstack Engineer @OfferZen

Role Description

We’re building the place where the right person meets the right opportunity. This is a role for an engineer who cares as much about the customer’s problem as they do about their craft.

Mission: OfferZen exists to help South African tech talent build an awesome future by connecting them to the right teams where they can do their best work. Our next big bet, Reduce the Noise, is all about making OfferZen the place where quality wins.

You’ll be building marketplace features, AI-powered tools (internally and externally), and internal tooling that makes this vision real. Your work will be felt by real candidates and real hiring companies every day.

Outcomes

• Design, build, and ship meaningful fullstack features every week across front-end and back-end.
• Act as an AI engineer on designated projects, building AI-powered features using tools and frameworks like OpenAI and Anthropic APIs.
• Own solutions end-to-end: from design and scoping through to delivery and post-ship iteration.
• Debug production issues, maintain a stable marketplace, and advocate for quality, performance, and security.
• Lead by example in AI-enabled engineering, using tools like Cursor and V0 to move faster without cutting corners.
• Mentor junior and intermediate engineers through pairing, code review, and honest feedback.
• Participate in Frontend and Backend Guilds, contributing to our component library, architecture, and testing standards.
• Document architectural decisions so new engineers can hit the ground running.
• Contribute to the technical roadmap by spotting areas to improve and making the case for them.

Tech Stack

• Ruby on Rails
• React
• Next.js
• MongoDB
• PostgreSQL
• ElasticSearch
• Redis
• AWS

Qualifications

• 7+ years of production software engineering experience.
• Strong across the full stack, with a frontend bias.
• 5+ years working with React (or similar) in a production environment.
• Product-minded: you think about the customer problem, not just the implementation.
• Strong instincts around patterns, responsibility separation, data modelling, and component-oriented design.
• You write unit tests, document your decisions, and write code that others can confidently build on.
• Experience with MongoDB and/or PostgreSQL.
• High confidence, low ego.
• You communicate proactively, unblock others, and make those around you better.
• AI Fluency: The 4 Ds.

Requirements

• Delegation: Know which tasks AI can do better or faster, and hand them off confidently.
• Description: Write precise, effective prompts that get the output you actually need.
• Discernment: Critically evaluate AI output. Catch what’s wrong, keep what’s right.
• Diligence: Use AI responsibly, ethically, and securely every time.

Background and personality

• 7+ years experience in software development.
• Used to working in small teams.
• Good communication skills.
• Driven by learning and continuously striving towards self-improvement.
• Attention to detail.

What it's like to work here

• We love to do fun stuff together and focus on building a connected tribe and a sense of belonging.
• We're dedicated to authenticity: treating people as people, caring personally, and speaking openly.
• We're passionate about learning and leveling up: striving for a growth mindset and sharing expertise.
• We’re all about balance: maintaining a healthy balance between home and work.
• This role can be based locally or remotely - we welcome all applicants based in South Africa.