Middle / Middle+ Python Backend Developer

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Are you actively looking for a new opportunity? Or just checking the market? Well… you might be in the right place!

We're looking for a talented Software Development Team Lead to help us lead, mentor, and coach a high-performing software development team while fostering an inclusive environment that inspires them to do the best work of their career to date.

As a leader at Lightspeed, your primary responsibility is to the people you support: ensuring they are growing as engineers, doing valuable work, and generally having a great time at Lightspeed. You also lead the team's delivery, enabling productive and sustainable ways of working while focusing on the most important things that bring long-term business value.

As a leader of strong engineers, technical leadership and a solid background in software development are a must so that you can challenge and grow your team members. You will also be able to influence the culture, facilitate technical delivery and work with your team on strategy and execution.

If you’re motivated by tackling technical challenges, delivering impactful solutions, and pursuing excellence within our distributed workforce, we’d love to hear from you!

Your Mission

Under your guidance, the team will take on the critical mission of supporting and enhancing our Restaurant Point-of-Sale product, helping businesses worldwide streamline their operations. You foster and strengthen a healthy, highly collaborative, and continuously learning culture across the teams.

What you’ll be responsible for

• Be the trusted lead and partner of a development team of 5-6 members, guiding, motivating, and developing your team to solve complex business problems.

• Enhance team growth through effective mentoring, coaching, and constructive feedback, while fostering a mutually supportive, inclusive, and collaborative environment.

• You model hands-on, lead-by-example excellence—actively contributing to the codebase, providing high-quality code reviews and design feedback, and driving technical alignment in challenging areas.

• Lead the way to develop performant, scalable, and maintainable applications and microservices, ensuring high technical quality and operational excellence in your area.

• Collaborate closely with other teams, architects, product managers, and engineering leaders to align approaches and priorities.

• Continuously improve our software delivery processes and practices, staying updated with industry trends to influence our strategic direction and foster innovation.

• Provide technical and process guidance to your team, and participate in recruiting top talent for the organization.

What you’ll be bringing to the team

• Proven experience leading a team of developers through successful software projects

• Excellent written and verbal communication with the ability to convey technical information to a wide variety of audiences.

• Solid understanding of development processes, testing, and CI/CD best practices.

• Experience delivering horizontally scalable applications and microservices.

• Passion for learning new things and desire to improve continuously.

• Solution-oriented and constructive mindset and ability to manage ambiguity.

• A backend development background with:

  • Advanced skills in Python (preferred) or Java.

  • Strong experience designing and building scalable APIs (e.g., REST, GraphQL) and database architecture.

Even better if you have hands-on experience with (but not necessary):

• Interest in or experience with POS or eCommerce systems

• Experience building scalable SaaS solutions

• Experience working with relational and NoSQL databases

• Experience with cloud platforms, preferably AWS

• Bachelor's degree in Computer Science, Software Engineering, or equivalent

Who you are:

• You are a problem solver who does not shy away from tackling complexity and critical thinking.

• You have a strong will to learn, grow, and leave your comfort zone.

• You have great energy and passion for technology.

What’s in it for you?

Come live the Lightspeed experience!

• Lots of autonomy, flexible work culture with the option of working remotely or from one of our beautiful offices

• Genuine career growth opportunities within a company that's continuously expanding.

• Make a meaningful impact by helping merchants grow their businesses through creating or improving products and addressing customer feedback.

• Be part of a team large enough for growth yet agile enough for real impact.

• Work on high-traffic products with a global user base.

• Opportunities to learn, develop new skills, and expand your expertise.

To all recruitment agencies: Lightspeed does not accept unsolicited agency resumes. If we have not directly engaged your company in writing to supply candidates for a specific vacancy, Lightspeed will not be responsible for any fees related to unsolicited resumes.

Lightspeed is a proud equal opportunity employer and we are committed to creating an inclusive and barrier-free workplace. Lightspeed welcomes and encourages applications from people with disabilities. Accommodations are available on request for candidates taking part in all aspects of the selection process.

Where to from here?

Obviously, this has to be mutually beneficial: we want you to step into a role you love, and we want to offer you a place you’re proud to come to every day. For a glimpse into our world check out our career page here.

Lightspeed is building communities through commerce, and we need people from all backgrounds and lived experiences to do that. We were founded in 2005, in Montreal’s gay village and our original members were all part of the LGBTQ+ community. The ethos of our business has been about inclusion from the very beginning, and we strive to provide a workplace where everyone belongs.

Who we are:

Powering the businesses that are the backbone of the global economy, Lightspeed's one-stop commerce platform helps merchants innovate to simplify, scale, and provide exceptional customer experiences. Our cloud commerce solution transforms and unifies online and physical operations, multichannel sales, expansion to new locations, global payments, financial solutions, and connection to supplier networks.

Founded in Montréal, Canada in 2005, Lightspeed is dual-listed on the New York Stock Exchange (NYSE: LSPD) and Toronto Stock Exchange (TSX: LSPD). With teams across North America, Europe, and Asia Pacific, the company serves retail, hospitality, and golf businesses in over 100 countries.

Lightspeed handles your information in accordance with our Applicant Privacy Statement.

Location

The role is based in Lithuania, with compensation for other locations discussed during the interview process; no specific remote or on-site format is stated.

About the company

A global financial technology company building a broad consumer finance super app, serving tens of millions of customers with products spanning spending, saving, investing, exchanging, and travel.

The technology organization develops the infrastructure and features behind the app and is expanding its internal AI agent capabilities within a heavily regulated financial environment.

Responsibilities

• Design, build, and maintain scalable Python services, APIs, and data pipelines for an internal agent platform
• Develop and deploy LLM agents, covering tool integrations, orchestration, and state management
• Create reusable platform capabilities so teams can develop, test, and run AI agents in production
• Improve agent reliability, observability, performance, and cost efficiency through evaluation, monitoring, and robust error handling
• Break down complex AI and backend problems into technical designs, reviewable components, and delivery plans, and review designs and code for security and maintainability

Requirements

• 5+ years as a software engineer focused on backend systems, including 3+ years using Python as the primary language
• Hands-on experience building LLM agents, with production experience in AI agent systems or platforms, plus a STEM academic background
• Fluency in SQL and proficiency in another object-oriented language, with experience in API development, integration, and distributed systems
• Ability to write concurrent code for I/O-bound and CPU-bound workloads and familiarity with Docker, Kubernetes, CI/CD, monitoring, and alerting
• Understanding of production agent challenges such as tool execution, context management, evaluation, and failure handling, and the ability to turn ambiguous requirements into clear designs and trade-offs