Top Software Engineer Jobs in Buffalo, NY

Build and expand fintech and payment systems using Go, microservices, databases, and cloud technologies. Design production APIs and tooling, diagnose customer issues, manage full release lifecycles, document systems, and mentor engineers. Collaborate with product and business teams while guiding AI agents to produce maintainable, observable, testable code that meets engineering standards. Work independently in a high-availability environment and contribute to next-generation financial products.

Leads software engineering efforts by developing resilient applications, coaching engineers, reviewing code and designs, overseeing source control and deployments, improving testing and performance practices, and contributing to architecture and requirements. Partners with technical and business stakeholders, presents engineering work, supports risk and regulatory controls, and ensures adherence to SDLC, security, audit, and change-management standards.

Provides architectural and technical leadership for institutional exchange systems, including matching engines, order management, market data, risk, and unified trading platforms. Leads ultra-low-latency distributed-system design, cross-team technical alignment, reliability standards, incident response, and multi-quarter initiatives. Maintains hands-on engineering contributions while mentoring senior engineers and developing technical leadership across teams.

Designs, develops, tests, and supports complex Salesforce applications using APEX, LWC, JavaScript, HTML, CSS, and nCino. Performs systems analysis, REST API development, technical planning, application evaluation, documentation, and process improvement. Coordinates project resources, manages technical tasks, ensures application efficiency and compliance, designs software test plans, and mentors junior engineers.

Design, implement, and maintain partner integration solutions; translate partner requirements into scalable technical implementations; troubleshoot and automate fixes; collaborate with product and engineering teams to improve tools and ensure successful partner onboarding and launches.

Lead design and delivery of scalable customer-facing features, services, and APIs that process real-time data and AI-powered insights. Build web experiences, contribute to LLM/AI workflows, ensure reliability through observability and rollout practices, and collaborate cross-functionally with Product, Design, ML, and platform teams.

Lead technical strategy, build and maintain software systems using AI, mentor early-career engineers, collaborate across disciplines, and protect user privacy and security. The role involves developing scalable systems on AWS and Kubernetes while working with healthcare data and adhering to HIPAA and data-security best practices.

Lead the design, architecture, development, deployment, and optimization of scalable .NET backend systems processing millions of daily healthcare transactions. Mentor developers, guide technical decisions, improve CI/CD pipelines, implement secure APIs, and collaborate with product stakeholders. The role requires expertise in .NET, C#, ASP.NET Core, cloud-native AWS services, Kubernetes, microservices, distributed systems, testing, observability, and secure software development.

Build and scale backend systems for Stytch’s identity platform, including authentication, authorization, and non-human identity APIs. Partner with product and engineering leadership, make architectural decisions, write design documents, review code, and deliver customer-facing features. Improve reliability through observability, incident response, and remediation while collaborating across Twilio and Stytch teams. Mentor engineers and participate in on-call rotations.

Develop and maintain scalable full-stack web applications using TypeScript, Java, Node.js, HTML, CSS, and MS SQL in a microservice environment. Build AI-powered solutions using LLMs, RAG pipelines, GenAI agents, vector databases, and AI orchestration frameworks. Responsibilities include frontend development, performance optimization, debugging, code reviews, data integrity, and collaboration with AI/ML teams. The role is remote and requires CST availability and high-speed wired internet.

Design, build, deploy, and maintain resilient, scalable production systems for Toast’s retail customers. The role sets long-term technical architecture and strategy, communicates technical direction, mentors senior engineers, improves engineering productivity, diagnoses performance issues, and drives initiatives amid ambiguity. Engineers collaborate directly with retail customers, visit stores, understand operational workflows, and use AI tools to improve development velocity and quality.

Build and operate high-throughput backend services powering AI agent orchestration, connector integrations, and real-time data pipelines. Design scalable core platform services, collaborate with ML, frontend, and product teams, implement infrastructure-as-code and CI/CD, and mentor junior engineers to deliver reliable, AI-powered features.

As a Software Engineer, you'll design, build, and maintain IAM solutions, ensuring security and reliability while working with cloud computing standards.

Design and build reliable backend services and integrations for Coinbase’s Unified Merge Gate. Lead automated code review, policy evaluation, CI evidence, authorization, merge controls, repository migrations, safe rollouts, observability, and operational ownership. Partner with Security, Compliance, Infrastructure, and engineering teams to improve software review and deployment workflows while measuring merge quality, review volume, time-to-merge, and escaped defects.

Develop and lead scalable enterprise applications for the Tech 360 technology reporting platform. Responsibilities include building REST APIs, web applications, ETL solutions, databases, microservices, and cloud-native systems; implementing Kubernetes, container, and CI/CD solutions; defining integrations and access controls; mentoring engineers; and supporting Agile delivery, security, risk, and regulatory standards.

Leads development of the Tech 360 enterprise reporting platform. Designs scalable applications, REST APIs, web applications, ETL solutions, databases, microservices, cloud-native deployments, and CI/CD pipelines. Partners with architecture and security teams on integrations and access controls, mentors engineers, and contributes to Agile delivery. The role also supports executive reporting, data visualization, risk controls, regulatory standards, and engineering best practices.

Design, scope, and implement scalable backend and platform solutions for a reservations and waitlist product. Improve performance and usability, collaborate with Product and Design, identify high-impact opportunities, and contribute across the stack including APIs and front-end integration.

Leads technical vision and strategy for Affirm’s Marketplace, Search, Ads Platform, and consumer experiences. Designs scalable full-stack platforms, guides architecture and technical excellence, coordinates initiatives across engineering teams, mentors engineers, and drives reliable delivery of customer-focused products across iOS, Android, and Web.

Develop and maintain .NET Core APIs and React/Vue applications, test software across browsers and devices, resolve support tickets, collaborate with QA on fixes and deployments, contribute to project planning, analyze test results, report development status, and participate in Agile/Scrum ceremonies. The role is fully remote in the United States and requires experience with .NET, web technologies, APIs, relational databases, and AI-native development.

Develop, test, debug, and maintain game software for console, PC, and mobile platforms. Collaborate with artists, designers, and engineers to define and implement features, deliver systems to specification, provide ongoing technical support, and balance scope, quality, and development pace.

Build and maintain resilient backend services and APIs for fraud detection, identity verification, and transaction monitoring. Integrate third-party risk/compliance platforms, partner with product and engineering teams, contribute to architecture decisions, and produce documentation to ensure secure, reliable systems at scale.

Build responsive Bubble.io applications for startup clients, collaborate with product managers and designers, refine requirements, test tools and assumptions, communicate with clients weekly, and contribute reusable components and tutorials to the internal library. The role offers autonomy, client exposure, and opportunities to advance into technical leadership or product management.

Develop and support full-stack Java and Angular applications powering an enterprise banking API ecosystem. Design API-driven services, integrations, and platform solutions; troubleshoot enterprise environments; review code; support SDLC, change management, architecture, security, and regulatory controls. Collaborate with engineers, architects, product owners, and business stakeholders while contributing to high-availability platforms, AI-assisted development initiatives, and technology innovation.

Architect and re-engineer highly scalable, resilient backend data systems supporting patient services. Lead distributed systems strategy, make architectural decisions, improve performance and reliability, mentor engineers, establish operational practices, and collaborate with product managers and cross-functional stakeholders to shape engineering and product direction.

Own end-to-end frontend development for core crypto payment flows across web and mobile. Improve latency, availability, and SLOs; build user-facing features (contacts, real-time transaction status); identify and fix performance bottlenecks; partner with product/design/backend; mentor junior engineers to reduce customer friction at scale.