Join a high-performance team building the next generation of software development tools. Moving beyond simple coding agents, you will design and build an agent-native platform that integrates traditional agile processes with AI. You will have a deep impact on product architecture, culture, and quality as the company transitions out of private beta.
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Software Engineer at Rezonant
Are you ready to build the future of software development? This London-based startup is moving beyond simple coding assistants to create an agent-native SDLC platform. As an early engineer, you will design the technical architecture and build high-impact product features using Python and React. If you thrive on ambiguity and want to leverage LLMs to redefine how software is built, this is the role for you.
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Location
London, United Kingdom
Compensation
Not Disclosed
Company
Rezonant
About this role
Role overview
About the company
Software1-10 employeesLondon, United KingdomSeed (VC-backed)
Rezonant is building the delivery layer for AI-native software development. We help product teams ship in a world where AI writes the code. Our agentic product translates product vision into deployed software by reading codebases, generating context-aware engineering tickets, and coordinating coding agents. Backed by General Catalyst and Firstminute, we’re pre-launch and building a top-tier team in London.
Backed by General Catalyst, First Minute Capital, Stem AI.
What you'll do
What you will do
- Design, conceptualize, and build product features from the ground up using Python, React, Next.js, and Temporal.
- Develop and optimize agentic workflows, implementing evals and leveraging LLM tools like Langgraph and Claude CLI to increase velocity.
- Collaborate directly with the founding team and early adopters to validate features and iterate rapidly based on real-world feedback.
Who you are
Who this is a fit for
- Has 2+ years of professional software engineering experience with a strong degree in CS, AI, Math, or Physics.
- Possesses a philosophical belief in AI-native development and proficiency in building LLM-based applications including RAG and prompt engineering.
- Demonstrates a strong product mindset with the ability to lead cross-disciplinary teams and a desire to create beautiful user experiences.
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Why this role
Why this role is remarkable
- Shape the future of the SDLC by building agent-native systems that enable traditional companies to achieve 10x development velocity.
- Join an elite, high-performance culture that values deep intellectual curiosity, bottoms-up innovation, and rapid execution in an ambiguous environment.
- Gain massive ownership at a critical growth phase as the company exits private beta, directly influencing the technical architecture and product direction.
Jack & Jill
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
Meet Jack
What happens next?
Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and Rezonant wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.