Senior Backend developer

Role overview:

We are hiring one Senior Backend Engineer to take end-to-end ownership of our serverless backend — a hands-on IC role for someone both technically excellent and comfortable being one of the few people the entire backend depends on. You'll own the services across several Node.js and Python repositories, work directly with the founders and product team, and set the technical bar for reliability, security, and performance.

Key responsibilities

• Design, build, and operate AWS Lambda services across our HCM/workforce, project-management, commercial/revenue, permissions, and document domains — each comprising dozens of functions.
• Own the multi-tenant PostgreSQL data layer — schema design, query performance, and the permission/relationship model — end to end.
• Maintain and evolve the request path — API Gateway → custom Lambda authorizer → VPC-bound Lambda → private databases — including the runtime IAM/credential model that scopes every request.
• Safeguard tenant isolation and security across a per-company Cognito authentication model.
• Build and maintain integrations with external construction data environments (Asite, Autodesk Construction Cloud), including large-scale document synchronization.
• Optimize performance and reliability to keep latency-sensitive endpoints well within platform limits under growing load.
• Raise the engineering bar — testing, observability, CI/CD, and modernization of legacy components.
• Debug and resolve production incidents to root cause, and put safeguards in place so they don't recur.
• Document decisions and designs and collaborate with the frontend (Angular) and product teams.

Challenges you'll solve.

We prefer to be candid — these are the problems that make this role genuinely interesting:

Latency under a hard ceiling

API Gateway terminates any request beyond ~29 seconds regardless of the Lambda's own timeout — yet much of our value comes from heavy cross-project reporting. You'll keep p95 latency within budget through set-based SQL, pagination, streaming, and asynchronous processing.

Least-privilege, per-request security

A shared custom authorizer mints short-lived, request-scoped credentials via sts:AssumeRole under a strict 2,048-character inline session-policy limit. You'll design permission models that stay within that budget and reason about IAM precisely.

Graph-shaped data, relational store

The permission and relationship model is inherently graph-like, but lives in PostgreSQL — you'll model it with recursive queries, careful indexing, and set-based traversal rather than reaching for a separate graph engine.

Watertight multi-tenancy

One Cognito pool per company and tenant-scoped access throughout — isolation is a first-order concern.

VPC-bound serverless

Lambdas run inside a VPC to reach private databases; you'll manage cold starts, connection lifecycles, and pool limits.

Resilient external integrations

Syncing large document sets from third-party APIs (including SOAP/XML) demands backpressure, deduplication, retries, and graceful partial-failure handling.

Compute-heavy workloads

Server-side PDF generation, image processing, and multi-currency handling within Lambda's memory and time constraints.

The stack.

Runtime — Node.js, Python, AWS Lambda

AWS services — -1 API Gateway, Lambda, Cognito, STS / IAM, Secrets Manager, S3 CloudWatch, VPC, EC2

Infrastructure & CI/CD- AWS SAM, CodePipeline → CodeBuild Shared Data —PostgreSQL

Qualifications.

• 5+ years building and operating production backend systems.
• Deep expertise in Node.js and JavaScript — the asynchronous model, event loop, and memory behavior — plus solid working proficiency in Python and its production behavior.
• Strong hands-on AWS experience, ideally serverless (Lambda, API Gateway, IAM/STS, VPC, Secrets Manager, CloudWatch) — able to reason about IAM policies, not just apply them.
• Advanced SQL and relational data modeling — set-based query design and a working understanding of why N+1 patterns cause production issues.
• Proven production-debugging ability — root-cause analysis in distributed systems from logs and first principles.
• Strong ownership, sound judgment, and clear written communication — able to make good decisions with incomplete information and explain trade-offs to non-engineers.

Interview Process:

Introductory call-Mutual fit and role overview.

Technical deep-dive- A walkthrough of a challenging production problem you have owned.

Practical exercise -A realistic backend task, or a walkthrough of your own representative code.

System design- Collaborative design on a real scenario.

Final conversation- Values, ownership, compensation, and offer.

Position = Java Developer

We are looking forward to hire a committed Java Developer with experience in building high performing, scalable, enterprise-grade applications. You will be part of our Engineering team that works on mission-critical applications. You will be managing Java/Java EE application development while providing expertise in the full software development lifecycle, from concept and design to testing.

You are required to:

Contributing in all phases of the development lifecycle.

Write well designed, testable & efficient code.

Ensure designs are in compliance with specifications.

Prepare and produce releases of software components.

Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review.

Technical Skills required

Java, Springboot, Microservices, Data structures & Algorithms, MySQL, NoSQL, Mongodb and Hibernate.

OUR CURRENT STACK

Backend: Spring (JAVA), Laravel (PHP), MySQL, NoSQL, NGINX Plus.

Frontend: Angular 5+ Ngrx/store 5

Infrastructure: Google cloud platform (App engine, CloudSQL, BigQuery, PubSub, Firebase Hosting), Scrapy Cloud, Pusher.io (websockets), Getstream.io, Filestack, Postmark app, AS2 Gateway, Google Cloud Endpoints Framework, MongoDB, Algolia, Memcache

Tools: Gitlab, Postman app, JIRA. Wondering what your Responsibilities would be? Technical Skills required O

You are where our search ends, if you hold:

B. Tech/ M. Tech or corresponding degree

Experience in the same role of almost 1-6 years

Experience with connecting backend and frontend services.

Exposure to consuming data through different interfaces (Web API's/Socket/ REST/ RESTFUL/ JSON/ XML).

Proficiency in Data Structures and Algorithms.

Understanding of web markup, including HTML 5 CSS.

Understanding of client-side scripting and JavaScript frameworks.

Ability to write clean, reusable and well documented code.

Proficient understanding of code versioning tools, such as Git.

Knowledge of API authentication techniques (Token, JWT, OAuth2) - desirable but not mandatory. (Experience with API Design will be a plus)

Fair spoken and written English Flexibility - Things change around here. FAST!

Other Inter-personal skills like self-motivation, persistency, patience and eagerness to learn and work independently.

Key Responsibilities:

● Design, develop, and maintain applications using .NET Core, ensuring optimal

performance and scalability.

● Write clean, maintainable, and efficient code, adhering to coding standards and best

practices.

● Diagnose and resolve technical issues, optimizing applications for maximum speed and

scalability.

Technical Skills:

● Proficiency in .NET Core,C#,Web API,EF,LINQ and related technologies.

● Experience in developing applications using microservice architecture

● Experience with cloud platforms

● Familiarity with front-end technologies (e.g., Angular, React) is a plus.

● Knowledge of version control systems like Git.

● Demonstrated proficiency in database design and the ability to write complex queries

● Proven experience in leading development teams and driving technical initiatives.

Job Responsibilities:

Support, maintain, and enhance existing and new product functionality for trading software in a real-time, multi-threaded, multi-tier server architecture environment to create high and low level design for concurrent high throughput, low latency software architecture.

• Provide software development plans that meet future needs of clients and markets
• Evolve the new software platform and architecture by introducing new components and integrating them with existing ones
• Perform memory, cpu and resource management
• Analyze stack traces, memory profiles and production incident reports from traders and support teams
• Propose fixes, and enhancements to existing trading systems
• Adhere to release and sprint planning with the Quality Assurance Group and Project Management
• Work on a team building new solutions based on requirements and features
• Attend and participate in daily scrum meetings

Required Skills:

•  JavaScript and Python
• Multi-threaded browser and server applications
• Amazon Web Services (AWS)
• REST

Strong expertise in AWS architecture, deployment and coding using Python and AWS Lambda functions. She/ he should also have experience with NOSQL database like MongoDB/ DynamoDB and exposure to Machine Learning. She/ he should be familiar with Ajax calls, interaction with API using JSON files and xml.

Knowledge of testing tools like JMeter and Selenium and programming languages like Javascript and Dot Net will be a big advantage.
The person should be able to guide junior resources, perform code reviews and solve performance issues as required.

About Toyota Connected

If you want to change the way the world works, transform the automotive industry and positively impact others on a global scale, then Toyota Connected is the right place for you! Within our collaborative, fast-paced environment we focus on continual improvement and work in a highly iterative way to deliver exceptional value in the form of connected products and services that wow and delight our customers and the world around us.

About the Team

Toyota Connected India is hiring talented engineers at Chennai to use Deep Learning, Computer vision, Big data, high performance cloud-based services and other cutting-edge technologies to transform the customer experience with their vehicle.  Come help us re-imagine what mobility can be today and for years to come!

Job Description

Toyota Connected is looking for a Backend Developer who will architect, design, develop and participate in testing and documentation of large-scale, distributed software applications, systems and services. The Labs team is focused on creating products and services for next generation Connected vehicle systems and the team members are required to be creative in solving problems, excited to work in new technology areas and be ready to wear multiple hats to get things done. This is a highly-energized, fast-paced, innovative and collaborative startup environment; therefore, it is essential that not only the skillset, but also the personality matches such an environment.

 You are a successful candidate if you:

• Are smart and can demonstrate it.
• Have 3+ years of experience as a developer for web scale products and services
• Have strong experience in Java or Golang (minimum 1 year) and implemented key aspects of an end-to-end solution
• Have expertise in implementing microservices (using tools and technologies for messaging, RPC, containerization, etc)
• Have expertise in design and development using DB (RDBMS, NoSQL) and caching (e.g Redis) solutions, especially in microservices environment
• Have experience with Containerization (Docker, Kubernetes, etc)
• Have Public cloud technology experience in production (Azure, AWS, or Equivalent)
• Have the ability and willingness to manage other developers including mentoring, performance reviews, etc
• Have solved non-functional aspects of like scalability, security, reliability with cutting edge if not bleeding edge technology
• Are good about creating unit tests, performing code reviews, optimizing performance and ensuring standards for maintainability
• You can manage ambiguity and are comfortable being set loose without a lot of direction
• You are confident in expressing your point of view from a position of knowledge and experience. You are also receptive to feedback and open to revising your plans when appropriate
• We think the knowledge acquired earning a degree in Computer Science would be of great value in this position, but if you're smart and have the experience that backs up your abilities, for us, talent trumps degree every time

 It will be Nice if you have:

• Some front-end development experience
• Hands-on experience delivering products or solutions that utilized Machine learning, NLP or other forms of AI - with tools such as Scikit-learn, Tensor flow, Keras, Theano / Spacy, NLTK, etc

What is in it for you? 

• Top of the line compensation!
• You'll be treated like the professional we know you are and left to manage      your own time
• Yearly gym membership reimbursement & Free catered lunches.
• No dress code! We trust you are responsible enough to choose what’s appropriate to wear
• Opportunity to build products that improves the safety and convenience of millions of customers.

                 Cool office space and awesome benefits

 Our Core Values

• Passionate: We are here to build something great, not just for the money. We      are always looking to improve the experience of our millions of customers
• Innovative: We experiment with ideas to get to the best solution. Any constraint is a challenge, and we love looking for creative ways to solve them.
• Empathetic: We begin making decisions by looking at the world from the perspective of our customers, teammates, and partners.
• Collaborative: When it comes to people, we think the whole is greater than its parts and that everyone has a role to play in the success!
• Effective: We consistently go beyond, being smart and proactive, to make things the right things happen, not waiting to be told.