Polyglot Engineer (JS/Python/Go)

YLD.com; Greater London; Remote; GBP 85,000 - 120,000; Full time

Benefits offered by this job

Company Private Health care

Maternity/Paternity leave up to 6m

25 days annual holiday

Training/conference allowance

Hardware allowance

Mental Health support

Headspace or Calm subscription

Company laptop

Referral schemes

Job summary

YLD is seeking a Senior Software Engineer to join client teams building innovative products. You’ll design scalable, resilient architectures and collaborate with talented engineers to deliver features in a fast-paced environment.

This remote-first consultancy operates across London, Lisbon and Porto, offering mentoring and opportunities to work with modern stacks like React, FastAPI, and Kubernetes. You’ll contribute to production operations and drive CI/CD advancement.

Qualifications

• Ability to design scalable, resilient architectures.
• Strong communication and team collaboration skills.
• Experience with CI/CD workflows and modern stacks.

Responsibilities

• Craft features meeting client needs and user requirements.
• Move products to full CI/CD delivery model.
• Collaborate with the team on engineering initiatives.
• Mentor engineers to accelerate career growth.
• Architect and deliver highly available, zero-downtime products.
• Oversee production operations and SLAs.
• Promote best practices within the department.
• Present work in show-and-tells to the department and wider company.

Skills

JavaScript/TypeScript

Python

Go

React

FastAPI

Gin

Express

Testing

System design

REST/GraphQL

Kafka

Redis

Kubernetes

Docker

AWS

CI/CD

Observability

Tools

Docker

Kubernetes

AWS

GCP

Terraform

CI/CD tools

Git

Job description

Location: UK

Department: Engineering

Employment Type: Permanent

About YLD:

Our goal is to help our clients keep moving forward. We work with them to build the skills and capabilities they need to stay ahead of the competition, and we know our success only happens when they succeed. We’re a team of curious, talented people, and we’re committed to making YLD a place where great people want to work, grow, and stay. We’re a remote-first consultancy specialising in software engineering, product design, and data. Our teams are based across London, Lisbon, and Porto, and we create digital solutions that continue to deliver value long after our work is done.

About the role:

As a Senior Software Engineer at YLD, you’ll be part of a client team building innovative products. We’re looking for someone curious, passionate, driven, and enthusiastic. You should be skilled in problem-solving and experienced in designing scalable, resilient, and fault-tolerant architectures. You’re also an effective communicator and a strong team player. Together with your team, you’ll thrive in a fast-paced engineering environment, delivering outstanding results and exciting projects.

Your day-to-day responsibilities will look like this:

• Crafting excellent products! You will be building new features that meet the needs of our clients and customers;
• Continuously delivering changes to products, as our client is moving to a full CI/CD model;
• Working closely with your team, regularly collaborating and on engineering initiatives, to continually push yourselves to be better;
• Learning, growing, and mentoring the engineering team to accelerate their career growth and encourage them to progress;
• Working with the Lead to architect, design, build, and deliver highly available, always-on, zero downtime products;
• Being responsible for the production operation and monitoring of products in line with SLAs;
• Driving good practices within your team, making an impact on the whole department;
• Participating in regular show and tells, promoting your work to both your department and the wider company.

Preferred Skills

• Proficiency in JavaScript/TypeScript, Python, and/or Go, with the ability to rapidly learn new languages;
• Experience with modern frameworks across the stack (FastAPI, Gin, Express, etc.);
• Production experience with React, modern build tools, state management, responsive design, and accessibility standards;
• Comprehensive testing experience (unit, integration, E2E, security) and performance optimization;
• Scalable system design patterns, load balancing, and high-availability architectures;
• Database design and optimization (both relational and NoSQL);
• API development (REST, GraphQL, gRPC) and event-driven architectures;
• Caching strategies and message queue systems (Redis, Kafka, RabbitMQ);
• Cloud platforms (AWS, Azure, GCP) with containerisation (Docker, Kubernetes);
• CI/CD pipelines and Infrastructure as Code (Terraform, CloudFormation);
• Monitoring, observability, and performance optimisation tools;
• You can keep a cool head when debugging production issues;
• Use AI tools to augment your work, applying sound judgement to adopt emerging technologies where they genuinely add value and increase your impact as an engineer.

You should apply if you are:

• Self-motivated, proactive and always looking for ways to improve and develop yourself;
• A good communicator, both in writing and verbally. You’ll be able to explain technical ideas and concepts in business-friendly language.
• Detail-oriented;
• Possess strong problem-solving skills that balance innovation with pragmatic technology choices to solve business needs;
• Used to working in a team-oriented, collaborative environment;
• Analytical and problem-solving-oriented;A genuine believer in diversity and fairness.

Benefits you’ll receive:

• Company Private Health care (currently provided by Vitality)
• Enhanced fully paid maternity and paternity leave for up to 6 months
• 25 days annual holiday (excluding Public Holidays)
• £2000 annual allowance for Training/Conferences
• £300 annual allowance for additional hardware
• Mental Health support: access to Oli app
• Meditation/Sleep support: Headspace or Calm app subscription
• Bonus (depending on Company performance and results)
• Company laptop
• Generous referral schemes

Our typical Recruitment Process looks like this:

• 1st Interview with someone from the Talent team (30/45 mins)
• Technical Interview with our Senior Developers (1h30)

We live and breathe our values, and know you will too:

• Growing every day
• Including everyone
• Relationships built on honesty and ethics
• Inspiring solutions
• Winning together

We’re an equal-opportunity employer and value diversity in all its forms. We do not discriminate based on race, religion, colour, national origin, gender, sexual orientation, pregnancy or maternity, age, marital status, or disability. We also offer a remote-first working environment, with flexible working and work–life balance as standard for all employees.