Senior Software Engineer

JLL supports the Whole You, personally and professionally.

Our people at JLL are shaping the future of real estate for a better world by combining world class services, advisory and technology to our clients. We are committed to hiring the best, most talented people in our industry; and we support them through professional growth, flexibility, and personalized benefits to manage life in and outside of work. Whether you’ve got deep experience in commercial real estate, skilled trades, and technology, or you’re looking to apply your relevant experience to a new industry, we empower you to shape a brighter way forward so you can thrive professionally and personally.

About the teamWe build and run shared platform services used by teams right across JLL's technology organisation. These are multi-tenant services with internal applications depending on them every day, so reliability, security and careful change management sit at the centre of how we work.

The team is small and distributed, with members in several regions. This role is based in Tel Aviv and collaborates across those regions daily, which calls for strong written communication and a high degree of independence.

About the roleThis is a hands-on contractor role covering both engineering and quality across the full stack. You will build features end to end, from the React front end through to the C# .NET Core services and APIs behind them, and you will own the testing that proves those services behave correctly for the applications that consume them.

End-to-end testing is a core part of the role rather than an afterthought. Alongside feature work, the team is delivering high-volume data operations whose results other applications depend on, so validating those flows, and automating that validation, carries the same weight as shipping the features themselves.

What you'll doOwn quality end to endTest application and integration flows from end to end, across both feature work and high-volume data operations

Write and maintain automated web tests

Validate that data processed in bulk lands correctly and stays available to the applications that read it

Build across the stackBuild and maintain single-page applications using React, JavaScript and TypeScript

Build and integrate REST APIs and backend services using C# .NET Core

Write clean, readable, well-tested code across the full stack

Use GitHub day to day: branches, pull requests, reviews

Use AI tools such as Claude and Claude Code to speed up coding, testing and documentation

Work with the teamWork with product, design and QA to turn requirements into working solutions

Take part in code reviews and help hold the team's engineering standards

Keep the team and stakeholders updated on progress, blockers and technical decisions

What we're looking forRequiredStrong hands-on experience with React, JavaScript and TypeScript

Proven experience building SPA architectures

Experience designing, building and integrating APIs

Experience with C# .NET Core backend services

Good working knowledge of GitHub for version control and team collaboration

Clear written and spoken communication in English

PreferredQA experience, including automated web testing

Experience with AI coding assistants (Claude, GitHub Copilot or similar), including custom prompts and Skills, and agentic workflows for development, testing or documentation

Load testing

Kafka and/or AWS MSK

Playwright

Octopus Deploy

Building or configuring AI agents for developer productivity: automated code review, test generation, workflow automation

How we work: you should be comfortable withA distributed team with limited timezone overlap, and the asynchronous habits that requires

High test coverage expectations on changed code

Services with production users, extended while they are running

Small team, broad surface area, direct ownership

If this job description resonates with you, we encourage you to apply even if you don’t meet all of the requirements below. We’re interested in getting to know you and what you bring to the table!

Personalized benefits that support personal well-being and growth:

JLL recognizes the impact that the workplace can have on your wellness, so we offer a supportive culture and comprehensive benefits package that prioritizes mental, physical and emotional health.

About JLL –

We’re JLL—a leading professional services and investment management firm specializing in real estate. We have operations in over 80 countries and a workforce of over 102,000 individuals around the world who help real estate owners, occupiers and investors achieve their business ambitions. As a global Fortune 500 company, we also have an inherent responsibility to drive sustainability and corporate social responsibility. That’s why we’re committed to our purpose to shape the future of real estate for a better world. We’re using the most advanced technology to create rewarding opportunities, amazing spaces and sustainable real estate solutions for our clients, our people, and our communities.

Our core values of teamwork, ethics and excellence are also fundamental to everything we do and we’re honored to be recognized with awards for our success by organizations both globally and locally.

Creating a diverse and inclusive culture where we all feel welcomed, valued and empowered to achieve our full potential is important to who we are today and where we’re headed in the future. And we know that unique backgrounds, experiences and perspectives help us think bigger, spark innovation and succeed together.