Full Stack Engineer

OfferZen Enterprise; United Kingdom; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Remote work

Flexible hours

Work-life balance

Job summary

OfferZen is seeking a Senior Full-Stack Developer with Ruby on Rails and TypeScript experience to own the core platform. This fully remote role operates within UK/South Africa hours, balancing a sustainable pace with meaningful ownership and impact.

You will shape the product roadmap, ship features quickly, and work directly with leadership to drive architectural decisions in a mature software platform handling sensitive data.

Qualifications

• 6+ years building software at a senior or lead level.
• Production-level Ruby on Rails and TypeScript experience across the full stack.
• Own releases, migrations, backups and restores in a cloud setup.
• Comfort reading, understanding and improving an established codebase.
• Defensive, security-conscious coding for health-related data.
• Smart use of AI tools with engineering rigor.

Responsibilities

• Own the technical direction of the core platform and roadmap.
• Ship client-requested features with an autonomous, fast-moving approach.
• Collaborate with leadership with minimal bureaucracy.
• Handle deployments, migrations, and operational responsibilities.
• Balance quality with pragmatic, scalable solutions.

Skills

Ruby on Rails

TypeScript

Full stack

Deployment & ownership

Security & compliance

AI tooling usage

Tools

React/Next.js

PostgreSQL

Job description

Senior Full-Stack Developer (Ruby on Rails)

Location: Fully Remote (UK / South Africa Timezones)

A profitable, organically grown global tech team building adaptive compliance and risk-assessment software used by over 1,000 organizations and hundreds of thousands of knowledge workers across 100+ countries.

We are looking for a Senior Full-Stack Developer to take ownership of our core platform, working directly with leadership with zero bureaucratic friction.

About The Role

You will own the technical direction and decide how things get built. This is an autonomous role for someone who finds technical responsibility energising and wants a genuine say in shaping the product roadmap.

• Your First 6 Weeks: You’ll be shipping code right away, tackling a clear roadmap of client-requested features and smoothing out application rough edges, rather than spending a quarter reading documentation.


• What’s Next: Enterprise HR system integrations (without per-licence pricing models), advanced internationalisation for our expanding global market, and internal tooling for our domain experts.

How We Work

• Remote & Aligned: Fully remote, operating primarily within UK/South Africa working hours for seamless team overlap and zero timezone friction.


• Sustainable Pace: We are not a high-pressure environment. No one gets woken up at 3 AM. We believe great software comes from people who have lives outside of work and value careful engineering over rushed output.

What We Are Looking For

• Core Experience: 6+ years building software, with proven experience at a senior or lead level.


• The Stack: Production-level experience with Ruby on Rails and TypeScript on the front end. You will operate comfortably across the full stack.


• Deployment & Ownership: Experience handling your own releases, migrations, backups, and restores (we run on a streamlined modern cloud setup).


• Legacy Mastery: Our platform has evolved robustly over a decade. You must be comfortable reading, understanding, and improving an established, mature codebase.


• Security & Diligence: Because we handle sensitive health-related data for real employees, you write defensively by habit and take data protection seriously.


• Pragmatic AI Usage: We expect you to leverage modern AI tools intelligently while applying rigorous engineering critical thinking to the output.

Advantageous Skills

• Advanced SQL (CTEs, window functions, complex joins) & Postgres schema optimisation.


• Architectural patterns (CQRS, DDD, hexagonal architecture) and trade-off analysis.


• Containerised development/deployment, React/Next.js, or functional programming experience (Elixir, Scala, Clojure, OCaml).


• Familiarity with security frameworks like ISO 27001, SOC 2, or GDPR.

What Matters Beyond Code

We value teammates who care about business and product outcomes over pure code dogmatism. Someone who doesn't default to unnecessary rewrites, respects codebases they didn't design, and prioritizes getting the right result over being right.