Lightspeed
Posted 3mo ago

Principal Software Developer

Lightspeed
United States
RemoteFull Time
Responsibilities
  • design systems
  • scale architecture
  • mentor engineers
Requirements
  • 15+ years of software development
  • 5+ years leading multiple teams
  • 2+ years managing architecture across large teams
  • Cloud-focused architecture
  • Multiple tech stacks
  • Strong communication
Technical tools mentioned
GoPHPJavaRuby on RailsPython

Job description

Hi there! Thanks for stopping by 👋

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

As a hands-on Principal Software Developer, you’ll guide design and architecture of the critical system components of the flagship Lightspeed Retail product used by thousands of merchants around the world. You will personally contribute to the key parts of the systems to deliver innovative solutions that meet customer needs. You will uplevel engineering craft across the organization, by providing technical guidance, promoting best practices, mentoring fellow engineers, while empowering the teams to build towards a sustainable architecture.

For this role, you should be located in Canada/USA, and able to work within EST/EDT hours. We offer a choice of fully remote, partially remote or fully office-based work environments (in cities with local offices).

What you'll be responsible for

  • Ensuring that systems built to support new initiatives are well designed and scalable.

  • Analyzing existing systems and infrastructure landscape, identifying opportunities to improve architecture, reduce duplication, make systems more performant and robust.

  • Identifying key recurring patterns leading to incidents and non-project overhead, and coming up with a plan to address those

  • Driving improvements in our systems reliability and performance.

  • Improving development practices, from design reviews, to testing and deployment, and to incident management

  • You conduct architectural deep-dives and mentor key members across all services teams.

  • As a senior member of the engineering team, you will also play a key in developing a high-performance culture in the Retail organization.

  • Contributing as part of the wider team to achieve organizational objectives even if this means doing things that aren’t strictly within the scope of your role.

What you’ll be bringing to the team

  • 15+ years of professional experience in software development

  • 5+ years of experience as a technical leader for multiple teams

  • 2+ years of experience in managing architecture across multiple teams with more than 35+ engineers.

  • History of developing business critical systems at scale, to run on the cloud.

  • History of delivering key outcomes for the business, under challenging timelines.

  • Experience in more than one technology stack such as Go, PHP, Java, RoR, Python, etc.

  • Outstanding written and verbal communication skills, with the ability to convey ideas concisely.

  • Ability to moderate technical conversations, handle diverse opinions, and make quick decisions.

 

Even better if you have, but not necessary

  • Expertise in distributed systems and building multi-region systems for the cloud

  • Deep expertise in domain-driven software development

  • Ability to lead and guide a team of engineers while contributing alongside them

  • Retail or Ecommerce domain experience

  • Experience with people management responsibilities

Who you are

  • You have a passion for software development and a customer-focused mindset

  • You are a team player who can work with, and help grow, other developers

  • You understand the need for constant improvement, self-growth, and accountability

  • You step up to lead features, solve problems, and research new technologies

  • You set ambitious goals, and act with a sense of urgency and focus

  • As a global company with employees and clients outside of Quebec, fluency in English as a working language is required for this position.

What’s in it for you:

  • Join a growing team and help us move to the next level

  • Amazing benefits & perks, including equity for all Lightspeeders

  • Constant development of both your skill-set and business acumen with limitless growth opportunities

  • Lots of autonomy, flexible work culture

  • Innovation time to explore and learn at work

  • Shaping the company by joining cultural & technical committees

  • Tons of growth opportunities into technical or people management roles

  • Opportunity to join a fast-paced, high-growth company

  • Opportunity to learn, expand your skill set, forge wonderful relationships and make your mark within the diverse and inclusive Lightspeed family, a true Canadian tech success story

…. And enjoy a range of benefits that will keep you happy, healthy and (not) hungry.

  • Lightspeed equity scheme (we are all owners).

  • Flexible paid time off and remote work policies.

  • Health insurance.

  • Contributions to your pension plan - RRSP.

  • Health and wellness benefit of $500 per year.

  • Paid leave and assistance for new parents.

  • Mental health online platform and counseling & coaching services.

  • Training opportunities to grow your skills and career

  • Volunteer day.

  • Fully stacked kitchen (hot and cold beverages, meals served)

  • Happy hours to build your relationships with colleagues after work

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.

 

About Lightspeed

Cloud commerce platform for retail and hospitality businesses.

Similar jobs

Principal Software Developer roles
15h
Save
Mark Applied
Hide
Software Engineer Level 5
Norfolk, Virginia, United States
OnsiteFull Time
Base-2 Solutions
Base-2 Solutions: Delivers engineering and technology services for national security.
10+ YOERequires active TS/SCI with CI polygraph, backend, data engineering, and API experience, plus Python, FastAPI, PostgreSQL, Elasticsearch, and extensive experience based on education equivalency.
Python, FastAPI, PostgreSQL, Elasticsearch, SQL
17h
Save
Mark Applied
Hide
Data Platform Principal Software Engineer
Jersey City, New Jersey, United States
$204k-$285k/yr OnsiteFull Time
JPMorgan Chase
JPMorgan ChaseNYSE: JPM: Global financial services firm providing banking and investment solutions.
7+ YOERequires formal software engineering training or certification, 7+ years of applied experience in applicable regions, system design and development expertise, programming proficiency, cloud-native experience, and agentic AI workflow leadership.
2d
Save
Mark Applied
Hide
(USA) Principal, Software Engineer
Bellevue or Sunnyvale
$132k-$264k/yr OnsiteFull Time
Walmart
WalmartNYSE: WMT: Operates a chain of hypermarkets, discount stores, and grocery stores.
5+ YOEBachelor's degree plus 5 years of software engineering experience, or 7 years of experience. Preferred master's degree plus 3 years. Experience with cloud-native systems, AI/ML, distributed architecture, and technical leadership.
Python, Java, JavaScript, Dart, Rust, C++, GitHub Copilot, CI/CD, SDKs, model runtimes, feature stores
3d
Save
Mark Applied
Hide
Tech Lead/ Principal Software Engineer
Plymouth Meeting, Pennsylvania, United States
$182k-$200k/yr OnsiteFull Time
Towne Park
Towne Park: Valet parking and hospitality services for hospitals and hotels.
8+ YOE2+ MgmtBachelor's degree in a technical field, 8+ years developing enterprise software, and 2+ years leading engineering teams. Requires Azure, .NET/C#, Angular or React, SQL Server, NoSQL, REST APIs, Agile, and secure development experience.
Microsoft Azure, .NET, C#, Angular, React, SQL Server, REST APIs, Claude Code, GitHub Copilot, Cursor, OWASP, Python, Next.js, LLM, MCP
5d
Save
Mark Applied
Hide
Principal Engineer, Software
Houston, Texas, United States
HybridFull Time
Waste Management
Waste ManagementNYSE: WM: Provides waste collection, recycling, and environmental services in North America.
10+ YOEBachelor's degree in Computer Science, MIS, Engineering, or related field plus 10 years of software engineering experience. Requires cloud, database, Python, Java, software design, testing, and Agile expertise.
AWS, Lambda, IAM, S3, EFS, SQS, SNS, API Gateway, CLI, Kinesis, Glue, ElastiCache, CloudWatch, CloudFormation, Oracle, SQL Server, PostgreSQL, Cassandra, DynamoDB, Python, Java
1w
Save
Mark Applied
Hide
Principal Engineer - Contact Center AI Transformation & Cloud Optimization
Irving or Hopkins
$150k-$176k/yr HybridFull Time
U.S. Bank
U.S. BankNYSE: USB: Provider of personal, business, and institutional financial services.
8+ YOEBachelor's degree or equivalent experience; 8+ years in software engineering, architecture, or technology leadership; 5+ years designing large-scale cloud-native platforms; enterprise strategy leadership experience.
Amazon Connect, Conversational AI, Agent Assist, Agentic AI, LLMs, RAG, Prompt Engineering, Generative AI, AWS, Amazon Bedrock, Amazon Lex, Contact Lens, Amazon Q, AWS Lambda, Amazon API Gateway, Amazon DynamoDB, Amazon Kinesis, microservices, Databricks, Snowflake, Apache Spark, Lakehouse, MLOps, FinOps, AIOps
1w
Save
Mark Applied
Hide
Principal Engineer
United States
$210k-$265k/yr RemoteFull Time
ParentSquare
ParentSquare: Software platform for K-12 school and family communication.
Bachelor's degree or higher in computer science or a related field; extensive technical leadership and complex high-scale systems experience using Ruby, Python, JavaScript/TypeScript, PHP, databases, and cloud infrastructure.
Ruby, Python, JavaScript, TypeScript, PHP, MySQL, PostgreSQL, AWS Aurora, RDS, SQS, LLMs, AI agents
1w
Save
Mark Applied
Hide
Engineer Principal – Ground/Application Software
Aurora, Colorado, United States
$118k-$201k/yr OnsiteFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Designs and manufactures advanced defense and aerospace systems.
Bachelor's degree in engineering or related technical field plus 6+ years' experience; active TS/SCI clearance, U.S. citizenship, object-oriented design, software lifecycle, UML, and listed development technologies required.
CI/CD, C, C++, Rust, Python, Ruby, AWS, AWS Lambda, Docker, Kubernetes, Spring, Jersey, Flask, CherryPy, Ruby on Rails, JavaScript, Angular, React, JavaFX, Qt, SQL, NoSQL, JPA/ORM, UML, Azure, MQTT, AMQP, Kafka, Vue, Nginx, Apache, Postgres, MATLAB, Cameo, PlantUML, DevSecOps, gtest, ctest, Agile