🌳 🚀 Senior Software Engineer / Tech Lead (x5 Roles) - Go, PHP, OOP, AWS, APIs, Full Stack Engineering - Remote

Senior Software Engineer / Tech Lead (x5 Roles) – Go, PHP, OOP, AWS, APIs, Full Stack Engineering

Award-Winning, High-Growth SaaS Scale-Up | Remote UK | £67,000–£90,000 + Exceptional Benefits

Areti Group – Carbon Positive Tech Recruitment | People & Planet Before Profit

About the Opportunity

We are hiring five exceptional Senior Software Engineers / Tech Leads for one of the UK's fastest-growing technology scale-ups.

Following significant growth and investment, the business is embarking on a major platform evolution programme, transitioning from a mature PHP-based architecture towards a modern, scalable, cloud-native ecosystem built around Go, APIs, distributed services, and event-driven architecture.

This is a rare opportunity to help shape the future technical direction of a highly successful SaaS platform used by global organisations.

We're looking for engineers who enjoy solving complex problems, influencing architecture, mentoring teams, and remaining hands-on with technology.

The Opportunity

These roles sit at the heart of the engineering organisation.

You'll lead technical delivery while helping drive a strategic technology transformation, modernising existing systems and building the next generation of products and services.

This role combines:

Hands-on software engineering

Technical leadership

Architectural ownership

Mentoring and coaching

Cloud-native platform development

Full-stack product delivery

You'll work closely with Engineering, Product, Platform, and Architecture teams to build highly scalable solutions capable of supporting continued rapid growth.

What You'll Be Doing

Leading and mentoring teams of talented software engineers

Driving engineering best practices around Object-Oriented Design, SOLID principles, clean architecture, and maintainable code

Designing and building scalable APIs and backend services

Helping evolve a large PHP platform towards modern Go-based microservices

Contributing across the full stack, from backend services through to customer-facing applications

Influencing technical strategy, architecture, and platform direction

Working closely with Product teams to deliver business-critical features

Supporting CI/CD, cloud infrastructure, observability, and platform reliability initiatives

Taking ownership from concept through design, development, testing, deployment, and ongoing optimisation

Playing a key role in hiring and developing future engineering talent

Technology Environment

We're specifically seeking polyglot engineers who are comfortable working across multiple languages and technologies.

Core Technologies

Go (Golang)

PHP

REST APIs & Service-Oriented Architecture

Object-Oriented Programming (OOP)

AWS Cloud Platform

MySQL / PostgreSQL

Docker & Containerisation

CI/CD Pipelines

Git & Modern Development Practices

Front-End Technologies

JavaScript / TypeScript

Vue.js, React or modern SPA frameworks

HTML5

CSS / Tailwind

Bonus Experience

Event-Driven Architecture

Kafka, RabbitMQ or messaging systems

Kubernetes

Terraform / Infrastructure as Code

Distributed Systems

Domain-Driven Design (DDD)

Observability and Monitoring

About You

We're less interested in job titles and more interested in engineering mindset.

You'll likely be:

A strong software engineer with deep OOP and design pattern experience

An advocate of clean code and engineering excellence

Comfortable working across both backend and frontend technologies

Experienced building and consuming APIs at scale

A polyglot developer who enjoys working across multiple languages

Interested in modern Go development and platform engineering

Experienced with PHP and excited by large-scale transformation programmes

Comfortable influencing architecture and technical decisions

A natural mentor who enjoys helping engineers grow

Passionate about building scalable, maintainable software

What Success Looks Like

In your first 12 months you'll help:

Accelerate the migration towards Go-based services

Modernise key areas of the existing PHP platform

Improve scalability, resilience, and performance

Drive API-first engineering practices

Enhance cloud-native capabilities within AWS

Support engineering teams through the next stage of platform growth

Raise technical standards across the organisation

Package & Benefits

£67,000–£90,000 depending on experience

Remote-first working

£1,000+ annual learning and development budget

33 days holiday rising to 40 days

4-week paid sabbatical after 5 years

Private healthcare

Income protection

Death-in-service cover

Matched pension contribution up to 5%

Innovation Weeks twice per year

20 hours paid volunteering leave

Flexible working arrangements

Inclusive, collaborative engineering culture

Working Model

Remote-first across the UK

Flexible hours around a 37.5-hour week

Occasional team collaboration days

High trust, high autonomy environment

Outcomes over presenteeism

Immediate Hiring

Interview slots are already reserved for strong candidates.

Please ensure your CV clearly demonstrates:

Golang and/or PHP expertise

Object-Oriented Design principles

API development experience

AWS cloud experience

Full-stack engineering capability

Technical leadership or mentoring experience

Architectural ownership and decision-making

Why This Role?

These roles are incredibly urgent , with interview slots pre-booked for next week . We are moving fast, and suitable candidates can expect offers within 3 days of interviews. This is an exciting opportunity to join one of the most forward-thinking companies in the market.

If you're a polyglot fullstack developer ready to take on new challenges, eager to learn, and passionate about technology and teamwork, we want to hear from you.

Areti Group – Climate Positive Tech Recruitment

We’re on a mission to put people and the planet first, leaving the world better than we found it.