Top Senior Software Engineer Jobs in Boston, MA

Lead Software Engineers will develop software solutions for national security, oversee technical challenges, mentor juniors, and enhance real-time data communications.

Design, build, and maintain blockchain and payments infrastructure; develop scalable microservices and secure RESTful APIs to transfer value across blockchain and banking protocols; integrate with banks and fintech; own system design, testing, deployment, and troubleshooting; ensure reliability, code quality, and strong test coverage while collaborating with product and engineering teams.

Develop and own backend features for the Payments & Partnerships domain using server-side Kotlin/Java (or similar). Collaborate with product, marketing, and frontend teams from design through production. Produce clean, testable code with high test coverage, deploy via CI/CD, and leverage AI/LLM tools to improve developer productivity.

As a Senior Software Engineer, you will develop and validate real-time sensor software, integrate algorithms, and perform rigorous testing in a collaborative environment.

Build and maintain high-performance backend services in Go for a low-latency, high-throughput trading exchange. Design distributed systems, optimize performance, improve observability, and collaborate across Product, Data, and Ops to ensure resiliency and scalability.

Lead technical direction and maintenance of a React Native mobile app for iOS and Android. Improve security, authentication (Okta/MSAL/OIDC), Intune device-compliance, CI/CD and release engineering, dependency and SDK upgrades, automated testing, and documentation. Mentor engineers, partner with Security/DevOps/Product, and own production support, crash triage, and app-store compliance.

Design and build an authoritative end-to-end project system that unifies sales, estimating, procurement, and factory production. Develop full-stack applications, data models, pipelines, and interfaces; apply AI to unstructured processes; integrate real production data; set technical direction; and collaborate closely with operational teams to ship high-impact internal tools.

The Senior Software Engineer will design, build, and maintain CI/CD pipelines, improve automation workflows, and mentor junior engineers in a security-focused development environment.

The role involves providing technical leadership, hands-on execution, and cross-team influence in software engineering, focusing on solutions for scaling and performance challenges while using AI tools.

Design and build end-to-end web and AI-powered dashboard features, scale cross-platform full-stack infrastructure, standardize product patterns, mentor engineers, lead cross-team technical projects, and collaborate with product and design to improve user workflows and AI adoption.

Build and operate scalable backend services and integrations for chat, voice, and agent-assisted support. Improve reliability, performance, and AI-driven capabilities; collaborate across product, design, AI, and operations; mentor engineers and lead technical design and architecture.

Build and maintain full-stack features for Saga, Deepgram's voice OS. Develop backend services (Node.js, Socket.IO, DynamoDB, AWS Amplify), frontend interfaces (TypeScript, React, Next.js), and scalable REST/GraphQL APIs. Participate in architecture, code reviews, performance optimization, and translate product requirements into iterative deliverables.

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.

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.

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.

Own technically complex, mission-critical areas and define technical strategy for new products. Design and ship full‑stack, AI‑driven features end‑to‑end, build scalable data ingestion and API systems, partner with product/design/customer teams to translate ambiguous problems into measurable outcomes, mentor engineers, and raise engineering quality and standards across the organization.

Design, build, and operate low-latency authentication and authorization services (OAuth, sessions, tokens, 2FA, account recovery). Lead technical designs, ensure strong security and observability, collaborate cross-functionally, simplify integrations, and mentor engineers while running production services with measurable SLOs.

Develop, maintain, and support R&D software; ensure stability and reliability; own SDLC; improve observability, and mentor team members.

Build and scale the company's data infrastructure: design ingestion paths, event models, schema-flexible data models, change capture, query performance, freshness guarantees, and analytics serving for customer-facing dashboards and evaluation pipelines.

Lead design and delivery of large-scale distributed systems for Catering & Events. Own architecture, drive technical strategy, mentor engineers, collaborate with Product and Design, ensure scalability, reliability, observability, and champion AI adoption to improve developer productivity and product capabilities.

Lead design and implementation of Headway's insurance systems (eligibility, pricing, matching, claims). Build data-intensive, ML-powered platforms and automation, mentor engineers, write high-impact code, and improve accuracy and reliability across state and payer complexity to scale insurance-covered therapy.

As a Senior iOS Engineer at Speechify, you'll lead product decisions, ship production code, and enhance app architecture for a growing user base. You're expected to have track record in scalable products, possess strong technical skills in Swift and SwiftUI, and be customer-focused in creating user experiences.

The role involves managing data collection for AI model training at Speechify, optimizing ingestion pipelines on cloud infrastructure, and collaborating with scientists to enhance data quality and scalability.

The Lead Software Engineer will develop advanced technologies, design software solutions, and collaborate on multi-disciplinary teams to solve national security challenges.