Sr. Software Engineer (Python, AWS Lambda)

Apptoza Inc.; Toronto; Hybrid; CAD 110,000 - 150,000; Full time

Job summary

Apptoza Inc. in Toronto is seeking a Sr. Software Engineer (Python, AWS Lambda) for a hybrid role with four days in-office.

The candidate will bring 10+ years of experience building large-scale, multi-tier distributed systems, deep Python expertise, and hands-on AWS capabilities including Lambda, APIs, and GenAI initiatives across global contact-centre solutions. Strong cross-functional collaboration and communication skills are essential.

Qualifications

• Bachelor’s degree in computer science or related field.
• 10+ years of experience building large-scale distributed software.
• Hands-on AWS cloud services experience.
• Proficiency in Python, Lambda, APIs, and LLM models.
• Strong communication and cross-functional collaboration abilities.

Responsibilities

• Design, develop, and roll out foundational cloud capabilities.
• Collaborate with teams to implement cloud, GenAI, and DevOps processes.
• Create and maintain design artifacts detailing functionality and data models.
• Contribute to global software engineering best practices.

Skills

Python

AWS Lambda

GenAI

Cloud technologies

Distributed systems

DevOps

Communication skills

Education

Bachelor's degree in computer science

Tools

Bitbucket

Ansible

Jenkins

CI/CD

Job description

Sr. Software Engineer (Python, AWS Lambda)

Toronto On, Hybrid- 4day a week in office

Experience Required: 10 & Above

Skillsets:

• 8+ Yrs of overall experience
• Strong / Advanced level Development skills in Python
• AI, GenAI, Agentic AI exposure / experience on AWS

Role Descriptions:

Role: Sr. Software Engineer - Contact Centre Innovation & GenAIThis role offers an exciting opportunity to shape the future of Customers contact center technology and drive innovation on a global scale. The successful candidate will play a pivotal role in transforming our engineering practices and delivering cutting‑edge solutions that enhance our clients experience and operational efficiency. We are looking for an experienced and high-performing Full-Stack Software Engineer with at least 10 years of software development experience. This role will be instrumental in driving innovation| implementing cloud capabilities| and building GenAI solutions across our contact centers in Canada| Asia| and the US. The ideal candidate has a passion for cutting‑edge technologies and a proven track record of building large-scale| complex software systems.Role and ResponsibilitiesParticipate in the design| development| and rollout of foundational cloud capabilities.Collaborate with cross-functional teams to implement key software delivery| cloud| GenAI| and DevOps processes.Create and maintain technical design artifacts that describe application functionality| solution designs| data models| interfaces| and integrations.Contribute and/or adopt global software engineering re‑usable best practice processes.

Essential Skills:

MUST HAVE Skill setsBachelors degree in computer science or a relevant field10+ years of experience building large-scale| multi-tier distributed software systemsHands on experience in cloud technologies| particularly AWS servicesHands‑on expertise with Python| Lambda functions| APIs| LLM Models| JavaExperience with DevOps culture| tools| and best practices (e.g. - Bitbucket| Ansible| Jenkins| CDD)Strong communication skills| able to articulate complex technical concepts to both technical and non-technical stakeholders.Ability to work and collaborate with cross-functional teams across multiple locations.Strong problem‑solving abilities and analytical skills with a keen eye for detail and the ability to assess alternatives| risks| and benefits.Demonstrates agility in learning and implementing cutting‑edge technologies across diverse tech stacks.

Additional Comments:

Candidates with eligibility for Reliability Status Clearance will be preferred.

Thanks & regards,