Software Engineer – Early-Stage Start-up – up to £85k + significant equity

JR United Kingdom; London; On-site; GBP 60,000 - 85,000; Full time

Job summary

A leading early-stage deep tech start-up in London is seeking a Software Engineer to join their growing team. This role offers the opportunity to work on challenging technical problems, contribute to key builds, and help shape engineering practices in a fast-paced environment. Ideal candidates will have a passion for technology and a proactive mindset, with experience in backend languages like Python or Java.

Qualifications

• 3+ years of engineering experience.
• Solid understanding of computing fundamentals.
• Experience with at least one backend language.

Responsibilities

• Build and scale the platform across backend and frontend systems.
• Write clean, maintainable code and solve complex technical challenges.
• Contribute ideas to product and technical decisions.

Skills

Problem Solving

Curiosity

Proactive Mindset

Tools

Python

Java

Go

React

TypeScript

Job description

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Software Engineer – Early-Stage Start-up – up to £85k + significant equity, london

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Client:

Location:

london, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Views:

1

Posted:

25.05.2025

Expiry Date:

09.07.2025

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Job Description:

Opportunity & Requirement Summary

? Role | Software Engineer

? Company | Early-Stage Deep Tech Start-Up

? Location | London (Office-based – 5 days per week)

Detailed Overview

Kioni Talent is supporting an early-stage deep tech start-up in London as they continue to grow their engineering team.

This is an exciting opportunity for an enthusiastic Software Engineer who loves solving complex problems and wants to work on challenging technical problems from the ground up. You’ll be joining a small team, working closely with experienced founders and helping shape how the product and platform evolve.

It’s a great fit for someone who stays up to date with advancements in technology, enjoys learning fast, and thrives in a fast-paced, hands-on environment.

What You’ll Do

• Build and scale the platform across both backend and frontend systems
• Write clean, maintainable code and solve complex technical challenges
• Contribute ideas to product and technical decisions
• Work closely with the founders and broader team on new features and improvements
• Help shape engineering best practices as the company scales

? Your Impact

• Contribute to key technical builds during a crucial growth phase
• Help define how things are built, tested, and deployed
• Be part of a high-calibre team with the ambition to scale quickly

?? What You’ll Need

• 3+ years of engineering experience
• Solid understanding of the fundamentals of computing
• Experience with at least one backend language (e.g. Python, Java, Go)
• A proactive mindset and ability to thrive in an early-stage environment
• Curiosity and a passion for keeping up with new technologies and best practices

If you’re excited by the idea of joining a growing team, solving interesting problems, and building something from scratch. We’d love to hear from you!

? Apply now to find out more about the company and the opportunity.

(Software Engineer, Full Stack Developer, Deep Tech, Start-Up, Backend Developer, Frontend Developer, Python, React, TypeScript, Java, OOP, London Tech, Early Stage)