Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Senior Back-End Engineer

LotusFlare

LotusFlare is a provider of cloud-native SaaS products based in the heart of Silicon Valley. Founded by the team that helped Facebook reach over one billion users, LotusFlare was founded to make affordable mobile communications available to everyone on Earth.

Today, LotusFlare focuses on designing, building, and continuously evolving a digital commerce and monetization platform that delivers valuable outcomes for enterprises. Our platform, Digital Network Operator® (DNO™) Cloud, is licensed to telecommunications services providers and supports millions of customers globally.

LotusFlare has also designed and built the leading eSIM travel product - Nomad. Nomad provides global travelers with high-speed, affordable data connectivity in over 190 countries. Nomad is available as an iOS or Android app or via getnomad.app.

Job Description and Responsibilities:

Senior Backend Engineers at LotusFlare are replacing traditional business back ends with an engagement-centric, dynamic product stack. They are responsible for further developing, securing, and scaling the back-end infrastructure to support the platform to handle millions of concurrent API calls. Every engineer is an integral part of our global engineering team and is directly responsible for more than half of a million users of our platforms. They are working on mission-critical, highly available distributed systems.

  • Your day usually starts with a daily meeting/standup/quick sync-up

  • Your daily responsibilities include the entire software cycle from developing/testing, to code reviews and maintaining/managing your code/application on production

  • You closely collaborate with product and other functional engineering teams

  • You take time out of your day to closely collaborate with your teammates, asking questions or providing answers

  • You take ownership of the code you write

Requirements:

  • A BA/BS in Computer Science, a related technical field, or equivalent practical experience would be a plus

  • 5-7+ years of work experience - designing, building, and deploying highly scalable and secure web services in production environments

  • We have a language-agnostic approach, we use Node.js, Lua, and Scala—experience with other languages such as Java, Python, Golang, C++, or similar is welcome

  • Strong understanding of security best practices, performance optimization, and fault tolerance

  • In-depth knowledge of distributed systems concepts (consistency, fault tolerance, consensus algorithms)

  • Mastery of RESTful API design principles. Experience with API gateways, API documentation tools, and API security

  • Deep understanding of network protocols (TCP/IP, DNS) and how they impact application performance and security

  • Strong understanding of concurrency models and their tradeoffs

  • Experience with techniques for handling concurrency challenges in high-traffic environments

  • Advanced data modeling skills in both SQL and NoSQL databases

  • Hands-on experience with a wider range of cloud platforms and technologies. This might include containerization (Docker, Kubernetes), serverless computing, and other DevOps tools


Benefits:

  • Competitive salary package.

  • Paid lunch (In the office)

  • Private healthcare

  • Yearly bonus

  • Training and workshops

  • Top-of-the-class engineers to learn from and work with

About us:

At LotusFlare, we attract and keep amazing people by offering two key things:
- Purposeful Work: Every team member sees how their efforts make a tangible, positive difference for our customers and partners.
- Growth Opportunities: We provide the chance to develop professionally while mastering cutting-edge practices in cloud-native enterprise software.

From the beginning, our mission has been to simplify technology to create better experiences for customers. Using an “experience down” approach, which prioritizes the customer's journey at every stage of development, our Digital Network Operator™ Cloud empowers communication service providers to achieve valuable business outcomes. DNO Cloud enables communication service providers to innovate freely, reduce operational costs, monetize network assets, engage customers on all digital channels, drive customer acquisition, and increase retention.

With headquarters in Santa Clara, California, and five major offices worldwide, LotusFlare serves Deutsche Telekom, T-Mobile, A1, Globe Telecom, Liberty Latin America, Singtel, and other leading enterprises around the world.

Website:
LinkedIn:
Instagram:
Twitter:

Vacancy posted more than 2 months ago
Similar jobs that could be interesting for youBased on the Senior Back-End Engineer in Toronto, ON vacancy
  • $130k - $160k per year

     ...to plan smarter and move faster. At Prophix, the OLAP cube engine sitting at the heart of FP&A Plus is what makes every budget, report...  ...possible for more than 3,000 finance teams worldwide. As a Senior Back-End Engineer specializing in Java and OLAP, you will own the Java side... 
    Senior
    Full time
    Contract work
    Internship
    Worldwide

    Prophix

    Toronto, ON
    20 hours ago
  • $135k - $154k per year

     ...solutions, and a non-custodial cryptocurrency wallet. The Senior   Back-End Developer is responsible for designing, building, and...  ...standards Desired Qualifications: - Degree in Computer Science/Engineering or related field - Experience migrating or modernizing legacy... 
    Senior
    Full time

    Rumble Inc.

    Toronto, ON
    20 hours ago
  •  ...optimize sales performance, enabling go-to-market agility. Our engineering organization includes multiple product application teams responsible...  ...join our application teams. You’ll work alongside other staff, senior, and early-career engineers to define, evolve ,and scale the... 
    Senior
    Long term contract
    Full time

    Forma.ai

    Toronto, ON
    20 hours ago
  • $40 - $50 per hour

     ...Benchmark , General Catalyst , Peter Thiel , Adam D'Angelo , Larry Summers , and Jack Dorsey . Position: Software Engineer Type: Contract Compensation: $40–$50/hour Role Responsibilities Develop MCP servers using Python... 
    Suggested
    Full time
    Contract work
    Summer work
    Local area

    Mercor

    Toronto, ON
    20 hours ago
  •  ...written communication skills; interpersonal and negotiation skills A team player with a track record for meeting deadlines   Back End Skills: Knowledge and experience with developing all server-side logic, definition and maintenance of the central database,... 
    Senior
    Full time

    Maarut Inc

    Toronto, ON
    20 hours ago
  • $60k - $65k per year

     ...implementation, testing, deployment, and production support. The position also involves collaborating with product, QA, DevOps, and other engineering teams to deliver secure, reliable, and high-performing backend solutions. Office Location: Toronto Employment Type:... 
    Permanent employment
    Full time
    Work at office
    Local area

    Infoya

    Toronto, ON
    20 hours ago
  •  ...Position: Software Developer – Back End Location: Toronto, ON Job ID#: RQ11143...  ...Role Overview We are seeking a Senior Back-End Software Developer to design, build...  ...encryption), and compliance ~ Knowledge of data engineering (ETL/ELT, Azure data services) and... 
    Senior
    Full time

    Symbiotic Digital

    Toronto, ON
    20 hours ago
  • $150k - $179k per year

     ...a video platform, cloud services, advertising solutions, and a non-custodial cryptocurrency wallet. Rumble is seeking a Senior Front-End Engineer to help evolve and scale the core web experiences across our platform, including video pages, listings, and short-form content... 
    Senior
    Full time

    Rumble Inc.

    Toronto, ON
    20 hours ago
  • $110k - $270k per year

     ...and communities. The Role We are looking for Front-End Software Engineers who are eager to build in a dynamic, startup environment inside...  ...Front-End Engineers will be directly collaborating with the back-end and design teams to develop and maintain the UI of Veeva'... 
    Senior
    Remote job
    Full time
    Work at office
    Local area
    Work from home

    Veeva Systems

    Toronto, ON
    20 hours ago
  •  ...autonomy, over-the-air servicing and AI-backed applications.   Ethernovia's co-...  ...class talent. We are looking for talented engineers and leaders who have an entrepreneurial...  ...silicon to the future of mobility. Senior ASIC (Front End) Design Engineer Summary: As a... 
    Senior
    Full time
    Flexible hours

    Ethernovia

    Toronto, ON
    20 hours ago
  • $136k - $187k per year

     ...'re all in on this mission. If you are too, let's talk. The End User Protection Team  Auth0 is an easy-to-implement authentication...  ...and ever-evolving tactics of these attacks.   The Senior Software Engineer Opportunity We are looking for a Senior Software Engineer... 
    Senior
    Long term contract
    Full time
    Local area
    Remote work
    Worldwide

    Okta

    Toronto, ON
    20 hours ago
  • $100k - $150k per year

     ...to leave our clients better than we found them, and to create a place where our people are proud to Build. Better. As a Frontend Engineer at RAVL, you’ll craft elegant, accessible, and performant user experiences that connect people with technology. You’ll bring deep technical... 
    Full time
    Flexible hours

    RAVL

    Toronto, ON
    20 hours ago
  • $120k - $130k per year

     ...who we are. If such a workplace intrigues you, we hope you’ll join us. About the role: We are looking for an experienced Senior Front-End Software Developer to help us craft scalable, accessible, and ultra-responsive web experiences. In this role, you will write clean... 
    Senior
    Full time
    Internship
    Work at office
    Flexible hours

    Financeit

    Toronto, ON
    20 hours ago
  • $120k - $160k per year

     ...people are proud to Build. Better.   As an Senior Full Stack Developer in our Build guild,...  ...designers, product managers, and fellow engineers to translate business requirements into...  ...platform teams to deliver complete features end-to-end. Contribute to CI/CD practices,... 
    Senior
    Permanent employment
    Full time
    Flexible hours

    RAVL

    Toronto, ON
    20 hours ago
  • $110k - $180k per year

     ...and other websites using the latest front-end technologies. Collaborate with product,...  ...and experience: BSc in Computer Science, Engineering, Physics, Math, or a related field....  ...professional software development experience. Senior: 6+ years of professional software... 
    Senior
    Long term contract
    Full time

    Xanadu

    Toronto, ON
    20 hours ago
  • $86.9 - $104.28 per hour

     ...RQ11359 - Software Developer- Front End - Senior 4 Months Contract (102 Business Days) Possible extension 5 Days ONSITE -222 Jarvis Street Must Have: Java 10 Oracle 12C or higher 10 DB SQL including DB Objects such as Tables Views Sequences Store Procedure... 
    Senior
    Full time
    Contract work
    Internship

    Source Code

    Toronto, ON
    20 hours ago
  •  ...Champion AI/LLM integration and prompt engineering best practices across the team. Drive...  ...licenses, Relevant experience and skills, Seniority and performance, Market and business consideration...  ...of their business needs. It delivers end-to-end services and solutions leveraging... 
    Permanent employment
    Full time
    Local area

    Capgemini

    Toronto, ON
    15 days ago
  • $150k - $190k per year

     ...something big!  About the Team Engineers on this team build our rules-based calculation engine for processing sales commissions....  ...scalable as Forma grows. As a Senior Engineer, Data Platform, you are...  ...engineering practices. By the end of your first 30 days, you will... 
    Senior

    Forma.ai

    Toronto, ON
    more than 2 months ago
  • $83.45k - $104.3k per year

     ...The Opportunity We are looking for a Senior Process Engineer to join our Paper Mill Division....  ...energy balances across stock prep, wet end, and ETP operations, including upstream...  ...: Uses structured root cause analysis, backs decisions with data, and builds lasting... 
    Senior
    Full time
    Local area
    Shift work

    Atlantic Packaging Products

    Toronto, ON
    12 hours ago
  • $130.5k - $159.5k per year

     ...requirements. That belief shapes how we build. Design Engineering is a small, deliberate function with a clear mandate: own the front-end across the product, hold a high bar of quality...  ...so you can take time off to recharge and come back better for our customers. Parental leave... 
    Senior
    Full time
    Internship
    Work at office
    Trial period
    Flexible hours
    3 days per week

    Relay

    Toronto, ON
    20 hours ago
  •  ...agentic workflows that accelerate investigations and back-office execution.   We are hiring a Senior backend engineer to  build and productionize agentic systems that...  ...release workflows  You will own services end to end:   Service design, API contracts, and... 
    Senior
    Hourly pay
    Permanent employment
    Full time
    Work at office

    Eq Bank

    Toronto, ON
    20 hours ago
  •  ...announced our $85 million Series C , and is backed by world-class investors, including Inovia Capital...  ...Role This is Float's first dedicated data engineering hire. You'll own the Snowflake architecture and ingestion layer end-to-end — the plumbing that carries data from banking... 
    Senior
    Long term contract
    Full time
    Work at office
    Immediate start

    Float

    Toronto, ON
    20 hours ago
  • $120k - $160k per year

     ...economic opportunity, alleviate poverty and end economic suffering for everyone. One...  ...We are looking for a Staff Software Engineer who can contribute across the product — building...  ...vibrant, smart team who have each other's back and believe in a culture of openness,... 
    Senior
    Long term contract
    Full time
    Internship
    Remote work
    Home office
    Flexible hours

    Newrich Network

    Toronto, ON
    20 hours ago
  •  ...SMBs be ‘on the money'. We’re looking for a Senior Software Engineer , who loves delivering robust code and...  ...receive feedback Our Tech Stack: Front-end : React, Typescript, Redux, Redux-Saga, React Native Back-end: Node.js, Typescript, Terraform, AWS (DynamoDB... 
    Senior
    Full time
    Internship
    Work at office
    Flexible hours

    Relay Financial

    Toronto, ON
    20 hours ago
  •  ...how they actually work. Own deployments end-to-end: discovery, build, integration,...  ...quality, catch regressions, and feed results back into the system. Build observability, tracing...  ...and standards for agentic systems; mentor engineers and partner with ML, product, and security... 
    Senior
    Full time

    Paytm

    Toronto, ON
    20 hours ago
  • $125k - $165k per year

     ...to plan smarter and move faster. As a Senior Software Engineer at Prophix, you'll play a central role...  ...technologies and bringing relevant insights back to the team. What You Will Bring...  ...working independently, owning deliverables end to end, and building relationships... 
    Senior
    Full time
    Internship

    Prophix

    Toronto, ON
    20 hours ago
  • $160k - $190k per year

     ...of connected & engaged teams.  As a Senior DevOps Engineer at 7shifts, you’ll join a high-performing...  ...and cost control Own work end to end, from problem definition and technical...  ...and fun. Equity: We’re a Series C, VC-backed SaaS company, and we believe everyone should... 
    Senior
    Long term contract
    Full time
    Work at office
    Remote work
    Home office
    Flexible hours
    Shift work
    Day shift

    7shifts

    Toronto, ON
    20 hours ago
  • $145k - $185k per year

     ...'re expanding rapidly and looking for a Senior Data Engineer to define and build the data foundation...  ...engineer, you'll own the data platform end-to-end: pipelines, warehouse, governance...  ...Equity Ownership : We’re a Series A, VC-backed company, and we believe in shared success... 
    Senior
    Long term contract
    Full time
    Flexible hours

    Cybrid Llc

    Toronto, ON
    20 hours ago
  •  ...Due to growth and internal promotions, we have multiple Senior Software Engineering roles available in various domains across the business. Report...  ...-to-day basis you will: Take ownership and lead complex back-end projects that  scale to millions of users .  Design,... 
    Senior
    Permanent employment
    Full time
    Work at office
    Work from home
    Flexible hours

    Achievers

    Toronto, ON
    20 hours ago
  • $153k - $240.5k per year

     ...with a sharp and passionate team at your back. If Braze sounds like a place where you...  ...such as MongoDB. We're looking for a Senior Cloud Security Engineer II to join our Security Engineering function...  ..., lead cross-team security initiatives end to end, take on the ambiguous problems... 
    Senior
    Full time
    Internship
    Work at office
    Local area
    Flexible hours

    Braze

    Toronto, ON
    12 hours ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior Back-End Engineer. Be the first to apply!