Sean is available for hire

Sean Lyons

Verified Expert in Engineering

Software Developer

Location

Austin, TX, United States

Toptal Member Since

March 30, 2022

Sean has a passion for all layers of the technology stack. His greatest strengths lie in operational excellence and designing reliable architectures. He replaced a legacy prototype with a production-ready solution, developed POCs, built CI/CD pipelines, and migrated a legacy logging solution. Sean describes himself as a generalist engineer with a commitment to craftsmanship. He ties software development lifecycles to the business's short- and long-term needs to produce impact.

Back-end Agile Software Development Amazon Web Services (AWS)Distributed Systems Prometheus Full-stack API Development Java Kubernetes Continuous Delivery (CD)Docker Go Python JavaScript SQL

Portfolio

Amazon Web Services

Go, Kotlin, TypeScript, AWS CloudFormation, Distributed Systems, Java

Symbiont

Go, Clojure, Distributed Systems, Kubernetes

iHeartRadio

Kubernetes, Terraform, Chef, Docker, Go, Grafana

Experience

Distributed Systems - 5 years Java - 5 years Kubernetes - 5 years Continuous Delivery (CD) - 5 years Agile Software Development - 5 years Amazon Web Services (AWS) - 4 years Go - 4 years Prometheus - 4 years

Availability

Part-time

Preferred Environment

IntelliJ IDEA, Vim Text Editor

The most amazing...

...tool I created was a Prometheus product for scalable time-series metrics. It is a multi-tenant service that ingests millions of data points per day.

Work Experience

Senior Software Developer

2021 - PRESENT

Amazon Web Services

Migrated a legacy logging solution to AWS CloudWatch for internal applications.
Owned and operated an internal application for automated resolution of operational issues.
Contributed to container monitoring in large Kubernetes clusters.

Technologies: Go, Kotlin, TypeScript, AWS CloudFormation, Distributed Systems, Java

Senior Software Developer

2018 - 2021

Symbiont

Owned and implemented a distributed database and consensus protocol.
Replaced a legacy prototype with a production-ready solution built on top of an optimal and testable message-driven architecture.
Contributed to reliability by implementing Jepsen chaos testing.
Contributed substantially to regular improvements to software development practices (static analysis, project management practices, release process).

Technologies: Go, Clojure, Distributed Systems, Kubernetes

Senior Site Reliability Engineer

2018 - 2018

iHeartRadio

Migrated AWS infrastructure monitoring and observability tooling to a new stack of Prometheus, Alertmanager, and Grafana.
Developed proofs-of-concept for migrating audio streaming architecture to Kubernetes to address deployment and scaling concerns.
Mentored interns working on short-term projects, driving project ideation and providing regular feedback.

Technologies: Kubernetes, Terraform, Chef, Docker, Go, Grafana

Senior Software Developer

2016 - 2018

Commonbond

Owned architecture and back-end development for the CommonBond For Business platform.
Built CI/CD pipelines for all software packages and deployments.
Trained and managed a small team of developers to accelerate product delivery.

Technologies: Java, Amazon Web Services (AWS)

Software Developer

2015 - 2016

FactSet

Contributed to a scheduled news delivery system written in Perl.
Designed and implemented user interfaces for FactSet Market Intellingence and BookBuilder applications.
Implemented secure data access layer with Adobe ColdFusion.

Technologies: JavaScript, Perl, Adobe ColdFusion, SQL

Experience

Amazon Managed Prometheus

http://aws.amazon.com/prometheus

A managed Prometheus product for reliable and scalable time-series metrics ingestion and querying. This multi-tenant service ingests millions of data points per day. Prometheus is typically very complex to deploy and scale but adds significant value for operators who need increasing volumes of data to navigate the complexity of modern deployments.

Symbiont Smartlog

Symbiont Assembly is a private blockchain platform designed to empower major financial institutions to streamline workflows with smart contracts. Smartlog is the decentralized networking layer of Assembly. It is responsible for state machine replication, the process by which various institutions obtain consistent copies of the shared ledger of network activity.

CommonBond For Business

https://www.commonbond.co/student-loan-benefits

A suite of products for enterprises looking to provide benefits to employees with student debt. The suite consists of student loan matching, similar to the common 401K repayment benefit, and an evaluation tool for building a savvy repayment plan.

Skills

Paradigms

Agile Software Development, Continuous Delivery (CD), Event-driven Architecture

Platforms

Amazon Web Services (AWS), Kubernetes, Docker

Other

Back-end, Distributed Systems, Property-based Testing, Prometheus, Full-stack

Languages

Go, TypeScript, Java, Python, JavaScript, SQL, Scala, CSS, HTML, Kotlin, Clojure, Perl

Libraries/APIs

API Development, React, Node.js

Tools

AWS CloudFormation, Amazon CloudWatch, Terraform, Chef, Adobe ColdFusion, Amazon Cognito, GitLab CI/CD, Grafana

Frameworks

Apache Shiro, React Native

Storage

PostgreSQL, MySQL

Education

2010 - 2014

Bachelor of Science Degree in Mathematics and Computer Science

Clarkson University - Potsdam, New York, USA

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring