{"id":3808101,"url":"https://alion.io/job/paychex-senior-python-engineer","title":"Senior Python Engineer","company":{"id":1764039,"name":"Paychex","domain":"paychex.com","url":"https://alion.io/company/paychex-com","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Jibe","truth_index":{"grade":"A","score":92,"open_postings":11,"ghost_share":0,"stale_share":0.273,"repost_share":0.091,"time_to_fill_p50_days":48,"computed_at":"2026-11-06T05:58:05Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Belgrade, Serbia"],"countries":["RS"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Amazon Aurora","optional":false},{"name":"Amazon EventBridge","optional":false},{"name":"Amazon S3","optional":false},{"name":"API Gateway","optional":false},{"name":"AWS","optional":false},{"name":"AWS CDK","optional":false},{"name":"AWS Lambda","optional":false},{"name":"AWS Step Functions","optional":false},{"name":"CI/CD","optional":false},{"name":"CircleCI","optional":false},{"name":"CloudFormation","optional":false},{"name":"Datadog","optional":false},{"name":"DynamoDB","optional":false},{"name":"GitHub Actions","optional":false},{"name":"GraphQL","optional":false},{"name":"IAM","optional":false},{"name":"Incident Management","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Python","optional":false},{"name":"Rest API","optional":false},{"name":"Terraform","optional":false}],"status":"live","first_seen_at":"2026-11-05T10:58:00Z","employer_posted_date":"2026-11-05","last_verified_at":"2026-11-06T07:04:40Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Paychex is reimagining how businesses manage their workforce by bringing payroll, HR, benefits, and advisory services together into a single connected HCM platform. As Paychex and Paycor come together, we're combining innovative technology, data-driven insights, AI, and human expertise to help organizations work smarter, support their people, and achieve better business outcomes. This is an exciting time to join our team as we continue to invest in innovation, simplify client experiences, and shape the future of work. At Paychex, you'll have the opportunity to grow your career, make a meaningful impact, and be part of something bigger as One Paychex.Responsibilities\nOwn end-to-end backend feature delivery with Python on AWS serverless (Lambda, API Gateway, SQS/SNS, EventBridge, Step Functions).\n\nDesign, build and maintain clean, well-documented GraphQL APIs that power product experiences across the platform, with attention to schema design, versioning, performance and security.\n\nArchitect scalable, resilient distributed and event-driven services, including integrations with third-party systems, idempotency, retries and failure recovery.\n\nDesign and optimize data models and storage (e.g., DynamoDB, PostgreSQL/Aurora, S3), with a focus on data integrity, query performance and cost efficiency.\n\nWork closely with Product and the Design Agency to define roadmaps and create epics and stories.\n\nCollaborate on AI-powered features and intelligent automation services, with rigor in verifying AI-assisted work.\n\nIntegrate with and improve our fully automated CI/CD pipeline (CircleCI, GitHub Actions), including infrastructure as code (e.g., Terraform, AWS CDK or CloudFormation).\n\nDrive backend standards for security, observability and reliability, and mentor other engineers through design and code reviews.\n\nQualifications\n5+ years of backend development experience, with a focus on Python and AWS serverless.\n\nStrong experience designing and building GraphQL and/or REST APIs at scale.\n\nExperience building and supporting distributed, event-driven systems, including integrations with third-party services and designing for resilience and failure recovery.\n\nSolid knowledge of relational and NoSQL databases, data modeling and performance tuning.\n\nStrong testing and clean-coding mindset (BDD, TDD, SOLID).\n\nDevOps-aware mindset: CI/CD with CircleCI and GitHub Actions, infrastructure as code, observability with Datadog or equivalent, and rollback readiness.\n\nStrong sense of production ownership, including deployment, monitoring, incident management and operational support.\n\nSolid testing and verification mindset, with a focus on delivering reliable, high-quality software where accuracy and correctness are critical.\n\nUnderstanding of application security best practices (authentication/authorization, IAM, secrets management, data protection).\n\nExperience leading product delivery: roadmaps, epics, planning and collaboration.\n\nExperience using AI-powered tools.\n\nWhat's in it for you?\nA flexible work philosophy\nCompany paid private health insurance\nCompany paid life and disability insurance\nPaid leave for illness, birth parents, non-birth parents, elder caregivers, marriage, adoption of a child and bereavement\nInclusive and accessible Employee Assistance Program (EAP) to help with everyday challenges\nChristmas and Easter bonuses\nOpportunity for strengthening expertise and skills through Paychex’s learning platform, including lessons in English\nNot sure if you meet every requirement?\nAt Paychex, we know that great talent comes in many forms. If you're passionate about the role but don't check every box, we still encourage you to apply. You might be the right fit - either for this position or another opportunity with us.\n\nPaychex is an equal opportunity employer. We are committed to fostering a respectful and inclusive workplace where all individuals are treated fairly and evaluated based on their qualifications, experience, and merit. We comply with all applicable federal, state, and local laws prohibiting discrimination in employment.\nOwn end-to-end backend feature delivery with Python on AWS serverless (Lambda, API Gateway, SQS/SNS, EventBridge, Step Functions).\n\nDesign, build and maintain clean, well-documented GraphQL APIs that power product experiences across the platform, with attention to schema design, versioning, performance and security.\n\nArchitect scalable, resilient distributed and event-driven services, including integrations with third-party systems, idempotency, retries and failure recovery.\n\nDesign and optimize data models and storage (e.g., DynamoDB, PostgreSQL/Aurora, S3), with a focus on data integrity, query performance and cost efficiency.\n\nWork closely with Product and the Design Agency to define roadmaps and create epics and stories.\n\nCollaborate on AI-powered features and intelligent automation services, with rigor in verifying AI-assisted work.\n\nIntegrate with and improve our fully automated CI/CD pipeline (CircleCI, GitHub Actions), including infrastructure as code (e.g., Terraform, AWS CDK or CloudFormation).\n\nDrive backend standards for security, observability and reliability, and mentor other engineers through design and code reviews.\n\n5+ years of backend development experience, with a focus on Python and AWS serverless.\n\nStrong experience designing and building GraphQL and/or REST APIs at scale.\n\nExperience building and supporting distributed, event-driven systems, including integrations with third-party services and designing for resilience and failure recovery.\n\nSolid knowledge of relational and NoSQL databases, data modeling and performance tuning.\n\nStrong testing and clean-coding mindset (BDD, TDD, SOLID).\n\nDevOps-aware mindset: CI/CD with CircleCI and GitHub Actions, infrastructure as code, observability with Datadog or equivalent, and rollback readiness.\n\nStrong sense of production ownership, including deployment, monitoring, incident management and operational support.\n\nSolid testing and verification mindset, with a focus on delivering reliable, high-quality software where accuracy and correctness are critical.\n\nUnderstanding of application security best practices (authentication/authorization, IAM, secrets management, data protection).\n\nExperience leading product delivery: roadmaps, epics, planning and collaboration.\n\nExperience using AI-powered tools.","description_format":"text","description_chars":6381,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Flexible schedule","Health insurance"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Employer of Record & PEO","Payroll Services","HR & Payroll 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