Lead Full Stack Engineer Job at Apex Systems (Mclean)

Technical Lead - Full-Stack AI Engineer - Private Equity SaaS

Our client, a cutting-edge SaaS platform for private equity and venture capital,...

Location

United States , Chicago

Salary:

170000.00 - 200000.00 USD / Year

Selby Jennings

Expiration Date

Until further notice

Requirements

6+ years in full-stack development
Strong skills in Go, Python, Node.js, and modern frontend frameworks (React, Next.js.)
Hands-on with LLMs (OpenAI, Anthropic preferred) and vector search (Pinecone, pgvector.)
Experience deploying in cloud environments (AWS, Azure, GCP.)
Startup-ready: thrives in ambiguity and owns projects end-to-end while moving fast and not overthinking.

Job Responsibility

Build scalable full-stack applications integrating AI agents into a secure SaaS platform.
Develop and optimize LLM pipelines, prompts, and backend systems (Supabase, Postgres, vector DBs).
Architect APIs and microservices for data processing and retrieval.
Implement responsive, high-performance frontend interfaces for complex workflows.
Ensure compliance with SOC 2, GDPR, and SEC standards.
Collaborate with product and design teams to translate requirements into seamless user experiences.

What we offer

equity

Fulltime

Staff/Principal Full Stack Software Engineer

Axon Records is a cloud-based records management system that modernizes how law ...

Location

United States , Boston

Salary:

168750.00 - 270000.00 USD / Year

Axon

Expiration Date

Until further notice

Requirements

8+ years of experience in full stack software engineering
A bachelor’s degree in Computer Science, Engineering, or a related technical field (or equivalent)
Experience building complex and impactful software in a team environment
Experience designing and delivering high-availability, scalable cloud-based systems
You write beautiful, simple, maintainable code for backend microservices
Deep skill in driving technical solutions across multiple teams
Backend service experience in managed languages such as Go, Java, Scala
Frontend experience in Javascript + Typescript, React
Strong experience with database, especially SQL
Interest in helping to set the technical and organizational direction for a growing engineering team across multiple global locations

Job Responsibility

Lead engineering architecture design reviews
Set a high technical bar for the team through code and architecture design reviews
Mentoring engineers
Working across teams with Product, Design, and Engineering to solve some of our biggest technical challenges within our stack for our customers
Improve our Engineering process, including long-term thinking, sprint planning and stand-ups
Building services that adhere to our high bar on availability and latency in this mission-critical space
Working with the latest open source technologies

What we offer

Competitive salary and 401k with employer match
Discretionary paid time off
Paid parental leave for all
Medical, Dental, Vision plans
Fitness Programs
Emotional & Mental Wellness support
Learning & Development programs
Snacks in our offices

Fulltime

Staff/Principal Full Stack Software Engineer

Axon Records is a cloud-based records management system that modernizes how law ...

Location

United States , Boston

Salary:

168750.00 - 270000.00 USD / Year

Axon

Expiration Date

Until further notice

Requirements

8+ years of experience in full stack software engineering
A bachelor’s degree in Computer Science, Engineering, or a related technical field (or equivalent)
Experience building complex and impactful software in a team environment
Experience designing and delivering high-availability, scalable cloud-based systems
You write beautiful, simple, maintainable code for backend microservices
Deep skill in driving technical solutions across multiple teams
Backend service experience in managed languages such as Go, Java, Scala
Frontend experience in Javascript + Typescript, React
Strong experience with database, especially SQL
Interest in helping to set the technical and organizational direction for a growing engineering team across multiple global locations

Job Responsibility

Lead engineering architecture design reviews
Set a high technical bar for the team through code and architecture design reviews
Mentoring engineers
Working across teams with Product, Design, and Engineering to solve some of our biggest technical challenges within our stack for our customers
Improve our Engineering process, including long-term thinking, sprint planning and stand-ups
Building services that adhere to our high bar on availability and latency in this mission-critical space
Working with the latest open source technologies

What we offer

Competitive salary and 401k with employer match
Discretionary paid time off
Paid parental leave for all
Medical, Dental, Vision plans
Fitness Programs
Emotional & Mental Wellness support
Learning & Development programs
And yes, we have snacks in our offices

Fulltime

Staff/Principal Full Stack Software Engineer

Axon Records is a cloud-based records management system that modernizes how law ...

Location

United States , Seattle

Salary:

168750.00 - 270000.00 USD / Year

Axon

Expiration Date

Until further notice

Requirements

8+ years of experience in full stack software engineering
A bachelor’s degree in Computer Science, Engineering, or a related technical field (or equivalent)
Experience building complex and impactful software in a team environment
Experience designing and delivering high-availability, scalable cloud-based systems
You write beautiful, simple, maintainable code for backend microservices
Deep skill in driving technical solutions across multiple teams
Backend service experience in managed languages such as Go, Java, Scala
Frontend experience in Javascript + Typescript, React
Strong experience with database, especially SQL
Interest in helping to set the technical and organizational direction for a growing engineering team across multiple global locations

Job Responsibility

Lead engineering architecture design reviews
Set a high technical bar for the team through code and architecture design reviews
Mentoring engineers
Working across teams with Product, Design, and Engineering to solve some of our biggest technical challenges within our stack for our customers
Improve our Engineering process, including long-term thinking, sprint planning and stand-ups
Building services that adhere to our high bar on availability and latency in this mission-critical space
Working with the latest open source technologies

What we offer

Competitive salary and 401k with employer match
Discretionary paid time off
Paid parental leave for all
Medical, Dental, Vision plans
Fitness Programs
Emotional & Mental Wellness support
Learning & Development programs
Snacks in our offices

Fulltime

Full Stack Java Tech Lead

We are looking for an experienced Tech Lead to guide development teams across se...

Location

Switzerland , Genève

Salary:

Not provided

Randstad

Expiration Date

February 28, 2026

Requirements

Degree in Computer Science, Engineering, or equivalent (HES, EPF, or federal diploma)
Minimum 6 years of experience as a Tech Lead
Expertise in Java/JEE and web technologies
Strong knowledge of development craftsmanship: Clean Code, Hexagonal Architecture, DDD, TDD, BDD
Proficiency with DevOps tools (Maven, NPM, GitLab CI, Docker, SonarQube)
Frontend technologies: TypeScript/JavaScript, HTML, Sass/CSS, Vue3/Pinia, Three.js
Backend technologies: Node.js, MongoDB, Express.js, Mongoose
Strong analytical mindset and attention to security practices
Proven experience leading a team of 5+ developers in an Agile environment

Job Responsibility

Act as a technical leader within the development team, taking ownership of critical components and ensuring alignment with architectural principles
Support developers with complex technical issues, code reviews, and knowledge transfer
Ensure compliance with coding standards, security guidelines, and organizational quality practices
Facilitate communication between architects and developers, translating decisions and collecting feedback
Stay up to date with new technologies and propose improvements to enhance efficiency and quality
Organize workshops, training sessions, and technical knowledge-sharing activities for the team
Drive continuous improvement initiatives in code quality, performance, and Agile practices
Collaborate with cross-functional teams and expert groups to ensure project success
In the first phase, work on existing systems related to 3D Building Information Modeling (BIM) projects, contributing to the digitization of building design, construction, and operational data

What we offer

Remote work is possible up to 40% (subject to agreement)
Service contract with a long-term perspective (up to 5 years)

Fulltime

Full-Stack Engineer (Data)

We are seeking a motivated and talented Full-Stack Engineer with a strong backgr...

Location

United Kingdom

Salary:

Not provided

Spectrum Life

Expiration Date

Until further notice

Requirements

Proven experience as a Full-Stack Engineer, with a strong portfolio of backend-focused or AI-driven projects
Expert proficiency in TypeScript and Node.js, with a deep understanding of modern JavaScript (ES6+), asynchronous programming patterns, and building scalable backend APIs and services
Extensive, hands-on experience architecting and building solutions on the AWS ecosystem. This includes core serverless services (Lambda, API Gateway, S3, EventBridge), databases (RDS, DynamoDB), security (IAM), and infrastructure as code tools (AWS CDK, CloudFormation, or Terraform)
Strong experience in database design and management, with proficiency in both relational (e.g., PostgreSQL) and NoSQL databases. You should be comfortable with schema design, query optimization, and data modeling
A solid understanding of Generative AI concepts and practical experience working with LLMs
Comfortable with the principles of LLM design, including prompt engineering and an understanding of model evaluation techniques
A solid understanding of the full software development lifecycle, including testing, monitoring, and deployment

Job Responsibility

Architectural Ownership & Design: Lead the technical design and architectural decisions for our core AI product. You will take ownership of the entire LLM lifecycle, from model selection and evaluation to deployment and monitoring, ensuring a clear and scalable design
LLM & Backend Engineering: Develop clean, secure, and performant serverless backend services using AWS Lambda and the wider AWS ecosystem
Design, build, and maintain the scaffolding for invoking Large Language Models (LLMs) via services like AWS Bedrock
Compare and evaluate different LLMs to determine the best fit for our use cases, establishing clear metrics and evaluation frameworks
Implement and manage robust data processing and storage solutions to support our AI features
Infrastructure & Best Practices: Design and deploy cloud infrastructure using modern best practices (e.g., Infrastructure as Code)
Implement comprehensive testing, robust exception handling, and application monitoring to ensure the high availability and reliability of our AI services
Take charge of your local development environment and see features through to production, collaborating with the wider team to ensure seamless product integration
Champion and maintain high standards for code quality, scalability, and maintainability

What we offer

Full time permanent contract
Competitive salary (Dependent on experience)
In-office, remote or hybrid working options
25 days annual leave
24/7 EAP and a wide range of health and wellbeing supports
Extensive list of employee perks and benefits

Fulltime

Lead Data Integration Specialist / Senior Full Stack Engineer

This young and agile company, providing identity risk solutions, is currently se...

Location

United States , New York

Salary:

Not provided

Orbis Consultants

Expiration Date

Until further notice

Requirements

10+ years of hands-on experience in developing production-ready software
Experience maintaining and working with data integrations / external API sources
Demonstrates skill in manoeuvring both front-end and backend technical projects, adept at prioritising tasks, defining requirements, and facilitating productive discussions within the team
Brings to the table a collaborative mindset, having effectively led engineering teams
Demonstrates a remarkable ability to adapt swiftly to the evolving needs of our growing organisation and dynamic product landscape
Proficient in client-side technologies such as TypeScript, JavaScript (ES6/React), HTML/CSS
Server-side proficiency in Python (Django)
Holds practical experience in managing relational databases, with a strong command over PostgreSQL

Job Responsibility

Design and build a scalable platform that simplifies the creation/operation of hundreds of data partner integrations
Liaise with engineers, designers, and product managers to translate our product and technical vision into a concrete roadmap
Partner with third-party vendors & our clients to gather requirements and co-create solutions
Craft high-quality, thoroughly-tested code that meets the unique requirements of our clients
Provide technical mentorship and guidance to fellow engineers

What we offer

Competitive Salary
Competitive Package
Opportunity to work with an Ambitious, Young, Growing Organisation
Unlimited PTO
Flexible work policy

Fulltime

Lead Software Engineer, Full-stack

Shape the next generation of browser-based 3D technology at scale. Push the boun...

Location

Germany , Munich

Salary:

Not provided

NavVis GmbH

Expiration Date

Until further notice

Requirements

7+ years of professional software development experience, with a proven track record of delivering complex, high-impact systems
Deep expertise in Java, Spring, and modern web application architectures, as well as advanced frontend experience with Angular and TypeScript
Strong knowledge of relational databases (PostgreSQL/PostGIS) and building scalable, data-intensive services
Demonstrated ability to lead architectural decisions, define technical roadmaps, and drive consensus in cross-functional environments
Experience delivering APIs and SDKs and gathering developer feedback to guide future development
Solid cloud infrastructure experience (preferably AWS) and familiarity with modern DevOps practices
Excellent communication and collaboration skills, with the ability to influence technical direction across teams and organizations

Job Responsibility

Architect and guide the evolution of our distributed client-server systems, driving performance, scalability, and maintainability of large-scale 3D rendering and spatial data services
Define and implement technical strategy in collaboration with engineering leads and product stakeholders, shaping how we process, enrich, and deliver geospatial data across the platform
Own critical backend and frontend components—including our Java/Spring services, Angular/TypeScript web client, and PostgreSQL/PostGIS data layer—ensuring robustness, performance, and long-term sustainability
Design and evolve APIs and integration patterns for internal and external use, influencing how partners and third-party developers extend the NavVis ecosystem
Drive cross-team initiatives—from introducing new technologies to improving development practices—with a focus on scalability, automation, and developer experience
Mentor and coach engineers within and beyond your squad, fostering technical excellence, knowledge sharing, and continuous improvement
Champion engineering quality by setting high standards for architecture, testing, observability, and operational readiness across services

What we offer

30 days of paid time off per year
Affordable access to a vast network of fitness and wellness facilities through EGYM Wellpass subsidy
Deutschlandticket subsidy to support sustainable travel using public transport
Flexible working hours and a hybrid work setup
Full visa and relocation support for international candidates
Attractive bike leasing model through JobRad
A competitive compensation package
Up to 4000 EUR employee referral bonus
Financial support for local language classes

Fulltime

Lead Full Stack Engineer

Apex Systems

Location:
United States , Mclean

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
January 20, 2026

Looking for more opportunities? Search for other job offers that match your skills and interests.

Similar Jobs for Lead Full Stack Engineer

Technical Lead - Full-Stack AI Engineer - Private Equity SaaS

Staff/Principal Full Stack Software Engineer

Staff/Principal Full Stack Software Engineer