Top Software Engineer Jobs in Buffalo, NY

Design, build, and maintain backend systems and versioned APIs for payments; collaborate with product, design, and infra; deliver features, tests, deployments, and long-term roadmaps while upholding high engineering standards.

Senior Backend Software Engineer responsible for extending APIs and backend systems, working with product and design, interfacing with PostgreSQL, improving testing, and addressing architecture, security, anti-fraud, performance, scalability, personalization, and payments. Mentor peers, participate in on-call rotation, coordinate across teams, and use LLMs where appropriate to improve product and development workflows.

Design, develop, and maintain software applications: implement features, fix bugs, participate in code reviews and Agile ceremonies, troubleshoot issues, support QA efforts, produce documentation, and collaborate across teams while occasionally leading small projects and training peers.

Designs, codes, tests, and documents .NET applications; follows SDLC and Agile/Scrum practices; supports Tier 3 incidents; works on system integration and CI/CD (Jenkins, GitHub); collaborates with product owners and vendors; participates in production releases and mentors junior developers.

Build, operate, and scale tier-0 backend services that ingest and process billions of emails daily. Design and deliver backend features, improve system stability, performance, and scalability, collaborate across R&D, participate in on-call rotations, and drive operational excellence and knowledge sharing.

Seeking a Software Engineer with 3+ years experience in software development, programming (Go, Java, C++, C#), and strong analytical skills.

The Staff Software Engineer will architect and develop high-performance cloud services, resolve infrastructure bottlenecks, ensure engineering best practices, and mentor junior members.

Collaborate with a distributed team to develop, maintain, and modernize the Landscape management software for Ubuntu, focusing on quality code and automated testing.

Build and maintain full-stack features for Cengage Learning Platforms using Java/Spring backends and React frontends. Integrate AI/LLM services, design APIs, improve platform architecture, troubleshoot cross-stack issues, write testable code, and collaborate with product, UX, and QA on accessible, high-quality learning experiences.

The Software Engineer will manage edge networking configuration, evolve the ingress layer, build network observability, and support regional expansion while defining technical standards for the team.

The Software Engineer will manage edge networking configuration, evolve the ingress layer, build network observability, support regional expansion, and establish team practices in a growing network-focused team.

Develop, test, and improve the OT Security Platform as part of the Microsegmentation Product Team, ensuring high-quality software and architecture.

Lead technical strategy and execution for multi-quarter initiatives; build and maintain AI-driven systems; mentor and raise the technical bar across teams; collaborate cross-functionally; ensure data security and HIPAA-compliant practices; operate in an AWS + Kubernetes environment while introducing new technologies as system load grows.

Lead technical strategy and architecture for Coinbase's Blockchain Platform, overseeing nodes, indexers, wallets, and asset lifecycle. Drive cross-team platform rearchitectures, enforce security and reliability standards, champion AI-driven automation, use observability to improve reliability, and represent the platform to executives to secure alignment and resources for large-scale blockchain infrastructure initiatives.

Define and drive Payments technical strategy and architecture for rails, routing, and funds-flow systems. Lead large cross-team initiatives, ensure financial correctness, improve reliability and cost via observability, mentor senior engineers, and align stakeholders across product, risk, and regulatory teams.

Lead design and implementation of Affirm's Lakehouse Platform using Iceberg, Spark, Snowflake, and cloud storage. Drive platform roadmap, governance, access controls, performance and cost optimization, analytics engineering best practices, observability, and on-call readiness. Partner cross-functionally, mentor engineers, and build scalable, secure, self-service data infrastructure and semantic/agentic data tools.

Design, build, and iterate patient onboarding systems and registration/eligibility flows. Own end-to-end projects, run experiments, optimize for performance, correctness, and resilience, and provide technical leadership, mentoring, and cross-functional collaboration with Product, Design, and Analytics.

Develop and maintain scalable investment portfolio management systems. Collaborate with cross-functional teams to ensure system correctness and client trust, focusing on complex domain logic.

As a Senior Full-Stack Engineer, you will design and deploy solutions for state governments, ensuring high standards of security and privacy while leading cross-functional teams.

The Senior SRE Engineer will design, build, and maintain resilient infrastructure systems, manage infrastructure-as-code, and write tooling in various languages.

As a Full Stack Software Engineer at Reacher, you'll own product features end-to-end, design scalable systems, mentor engineers, and lead architectural decisions in an AI-driven environment, focusing on both backend and frontend development.

Reacher seeks a Full Stack Software Engineer to lead product features, design scalable backend systems, mentor engineers in AI-native workflows, and enhance user experiences across the tech stack.

Develop and maintain Java applications for DoD systems, focusing on backend services, REST APIs, and microservices, while ensuring security and performance.

Build and scale backend systems and APIs for Segment CDP, collaborate with product and design, identify performance bottlenecks, improve reliability, participate in on-call rotation, and drive architectural decisions balancing velocity and stability.

The Staff+ Software Engineer will shape the technical direction, mentor junior engineers, and lead complex software system development while collaborating effectively with cross-functional teams.