At a Glance
- Tasks: Build backend systems for money movement, reconciliation, and AI integration.
- Company: Join Letly, an innovative AI-Native company transforming the rental industry.
- Benefits: Competitive pay, equity, and a chance to work in a high-growth environment.
- Other info: Fast-paced environment with opportunities for mentorship and career growth.
- Why this job: Tackle real-world challenges in a dynamic team while making a significant impact.
- Qualifications: Experience in backend development and a passion for system design.
The predicted salary is between 63000 - 77000 £ per year.
The role involves building the backend systems that Letly runs on — the software behind every viewing, tenancy, certificate, rent payment and repair. These systems require correctness, reliability and scale as they handle real people's money, homes and legal exposure.
This is a junior-to-mid hire. At junior level, you will ship features inside services owned by others, with review, mentoring and real production responsibility from the first month. At mid level, you will own features and services end-to-end.
What you'll work on:
- Money movement: Rent, deposits and payouts through pooled client-money accounts — idempotent processing, split-settlement, exactly-once across service and bank boundaries.
- Reconciliation & bookings: A penny-accurate, self-healing ledger reconciling bank activity across thousands of tenancies; contended scheduling for viewings, certificates, photography, maintenance against finite slots and vendor availability.
- Event-driven consistency: Services coordinating over Pub/Sub — sagas across offer, contract, tenancy and payment without relying on distributed transactions.
- AI harnesses in production: Deploying agentic AI into real-world operational settings — acting on real money, tenancies and legal exposure, with the necessary guardrails, observability and correctness.
Our stack: We build on NestJS and TypeScript on GCP/GKE, with MongoDB, Redis and GCP Pub/Sub. You don't need to arrive fluent in it. We hire strong backend engineers who've built production systems with any robust framework — Java/Spring Boot, Go, Kotlin, C#/.NET, Python (Django/FastAPI) or Ruby on Rails — and can ramp into TypeScript quickly.
How we build: We focus on small, well-factored services, using TDD and DDD as defaults. Trunk-based CI/CD allows you to ship to production and own it, with tests, observability and clean rollbacks.
What we're looking for:
- 0–2 years building production backend systems for junior, 3+ for mid; serious internships or shipped side projects count for junior.
- Fluency in at least one backend language and framework, with an appetite for system design.
- Strong fundamentals: concurrency, HTTP and API design, data modelling (document or relational), and understanding failure scenarios.
- You treat tests as part of shipping and can read a large codebase you didn't write.
- AI-Native engineer: you use AI across all layers of your work and understand LLM failure modes and patterns.
- Junior: you've shipped code real users depended on — an internship, a placement or a substantial side project counts.
- Mid: you've owned a service or a substantial feature in production end-to-end.
Nice to have:
- Experience with MongoDB and GCP/GKE.
- Familiarity with event-driven architecture and message brokers (Pub/Sub, Kafka).
- Exposure to payments, ledgers, reconciliation or similar domains where accuracy is critical.
- A computer science or other technical degree, or a relevant track record.
Who does well here:
- You are precise about correctness — these systems move money;
Software Engineer — Junior / Mid in London employer: Worky
Letly is an exceptional employer for aspiring Software Engineers, offering a unique opportunity to work on complex backend systems that directly impact real people's lives in the heart of London. With a strong focus on employee growth, you'll receive mentorship and hands-on experience from day one, while being part of a small, agile team that values correctness and innovation. Enjoy competitive pay, meaningful equity, and the chance to tackle challenging problems in a fast-paced environment, all while contributing to the future of AI-driven home management.
StudySmarter Expert Advice🤫
We think this is how you could land Software Engineer — Junior / Mid in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Worky or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Worky.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Worky.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Worky that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Software Engineer — Junior / Mid in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Worky.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Worky and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Worky
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Worky uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
